201 6 ½ Digit Multimeter User’s Manual Printed Date: 04/2008
Table of Contents 1 GENERAL INFORMATION .......................................................................................... 6 1.1 FEATURE OVERVIEW ............................................................................................... 6 1.2 WARRANTY INFORMATION ...................................................................................... 7 1.3 PRECAUTION OF OPERATION .................................................................................. 8 1.4 UPKEEP OF 1201...........
.7.2 RTD Measurements ........................................................................... 45 3.7.2.1 2-Wire RTD Measurements .............................................................. 45 3.7.2.2 3-Wire RTD Measurements .............................................................. 47 3.7.2.3 4-Wire RTD Measurements .............................................................. 49 4 FRONT PANEL OPERATIONS.................................................................................. 52 4.
.4.6 Stepping (Step) .................................................................................102 4.4.7 Initial Mode .........................................................................................103 4.4.8 Language.............................................................................................104 4.4.9 Error Condition...................................................................................105 4.4.10 Firmware Revision ................................................
1 General Information This section contains general information about BERKELEY NUCLEONICS CORPORATION 1201 Multimeter. The information is shown below: Feature Overview Warranty Information Safety Information Symbols and Terms Specifications Inspection Options and Accessories If you have any questions after reading this information, please contact your local service representative. 1.1 Feature Overview 1201 is a 6.5 digit digital multimeter. It has 0.
100MΩ. Frequency: From 3Hz to 300kHz. Period measurement. Diode measurement. Continuity measurement for resistance. Thermocouple temperature & RTD measurements. Some additional capabilities of 1201 include: Full math functions – dB, dBm, MX+B, ratio, %, Max/Min, null & limits. Optional multipoint scanner card – For internal scanning, options include 1201–opt01, a 10-channel, general-purpose card. USB and GPIB (Optional) remote control interface.
maintenance, unauthorized modification, improper operation, ignorance of environmental specifications or improper software or interfacing. 4. Remarks: No other warranty is expressed or implied, except for the above mentioned. The remedies provided herein are the buyer’s sole and exclusive remedies. BERKELEY NUCLEONICS CORPORATION shall not be liable for any direct, indirect, special, incidental or consequential damages. Limitation of warranty 1.
dangerous situations where damage may result. This product should be placed in a safe area in case of unpredictable personnel use. The rear protective conduct terminal needs to be connected to the actual earth ground or electric shock may occur. The patent and related documents for the equipment belong to BERKELEY NUCLEONICS CORPORATION CORP. and they aren’t allowed to be used by others without permission. 1.
Use caution when measuring voltages above 30 V RMS, 42 V peak, or 60 V DC. These voltages pose an electric shock hazard. When using the probes, always keep your fingers behind the finger guards. Always connect the common test leads (black) before connecting the live test leads (red), and disconnect the live test leads (red) before disconnecting the common test leads (black). This will reduce the chance of an electric shock.
This symbol indicates “Protective Conductor Terminal”. This symbol indicates earth (ground) terminal. This symbol indicates this product complies with the essential requirements or the applicable European laws or directives with respect to safety, health, environment and consumer protections. Note: Full 1201 specifications are included in Appendix A. 1.7 Inspection Your product package is supplied with the following items: One 1201 Multimeter unit. (85 (H) x 210 (W) x 350 (D) mm, approx. 4.
Material: Probe Body: Outer Insulation-Santoprene Rubber. Banana Plug: Body Brass, Nickel Plated Spring Beryllium Copper, Nickel Plated. Insulation: Polypropylene Resin Flasme Retardant Grade 2038. Others If any part of the Test Lead Set is damaged, please do not use and replace with a new set. ※ Warning: If users use the Test Lead Set without following the specification of Berkeley Nucleonics Corporation, the protection of the Test Lead Set could be impaired.
1.9 1201’s Dimension Please get the dimension’s information in the following different ways. 1. The dimension without the handle and the front & Rear Bumpers is in the following Picture 1. (LxWxD - 213.6x88.6x370 mm) 2. The dimension with the handle and the front & Rear Bumpers is in the following Picture 2. (LxWxD - 255x113x373 mm) 3. The dimension with the front & Rear Bumpers, but without the handle is in the following Picture 3.
2 Overview This chapter will give you an overview of 1201’s basic features and guide you through the basics of 1201 digital multimeter. Users will become familiar with those features after reading this chapter. 2.1 Setting up Your 1201 Digital Multimeter The purpose of this section is to prepare users for using 1201 DMM. You may want to check if you have all the parts with your multimeter. All our products are handled and inspected professionally before shipping out to our customers.
Figure 1-1 【Step 2】(Pull out the handle) When the handle is turned up to 90° with the multimeter please pull out the handle from the multimeter as shown in Figure 1-2. Figure 1-2 Ⅱ. Adjusting the position for your convenience Here are some example positions to suit users’ needs.
Figure 1-3 【Position 2】 The adjusted position is for operation as shown in Figure 1-4。 Figure 1-4 【Position 3】 The carrying position is with the handle as shown in Figure 1-5。 Figure 1-5 16
2.1.2 To connect the power Check the power-line voltage on the rear panel to see if voltage setting is correct for your area. Change the setting if it is not correct or the fuse is broken. Please follow the steps below. 2.1.2.1 To convert the voltage Warning! In some areas, the power supplied voltage is 240V or 120V; in others, the power supplied voltage is 220 V or 100 V. Please refer to your local power supplied voltage to see if you have the right setting.
Figure 2-1 【Step 2】 Open the voltage setting selector cap as shown in Figure 2-2. (You might need a screwdriver to do so.) Figure 2-2 【Step 3】 Remove the red voltage setting selector from the right middle seam as shown in Figure 2-3. (You might need a screwdriver to do so.
Figure 2-3 【Step 4】 Turn it over to 220V position as shown in Figure 2-4. Figure 2-4 【Step 5】 Insert the voltage setting selector back into the socket and close the cap as shown in Figure 2-5.
2.1.2.2 To change the fuse Warning! Before replacing the power-line fuse, make sure the multimeter is disconnected from the AC power. You must be a qualified personnel to perform this action. Warning! For continued protection against fire or instrument damage, only replace fuse with the same type and rating. If the instrument repeatedly blows fuses, locate and correct the cause of the trouble before replacing the fuse. Verify that the power-line fuse is good. Replace the fuse if it is damaged.
【Step 2】 Open the voltage setting selector cap as shown in Figure 2-7. (You might need a screwdriver to do so.) Figure 2-7 【Step 3】 Remove the red voltage setting selector from the right middle seam as shown in Figure 2-8. (You might need a screwdriver to do so.
【Step 4】 Remove the broken fuse from the selector as shown in Figure 2-9. Figure 2-9 【Step 5】 Replace with the new fuse as shown in Figure 2-10. Figure 2-10 【Step 6】 Insert the voltage setting selector back into the socket and close the cap as shown in Figure 2-11.
【Step 7】 Make sure the power switch on the front panel is in “Power OFF” condition before plugging as shown in Figure 2-12. Figure 2-12 Power switch: “POWER OFF” 【Step 8】 After finishing the above procedures, you can plug in your power cord as shown in Figure 2-13.
【Step 9】 Press on the power switch on the front panel for activating 1201 as shown in Figure 2-14. Figure 2-14 Power switch: - 2.1.3 “POWER ON” Factory Default When Power-ON Table 2-1 shows the factory default of 1201.
AC Digits Voltage 5.5 Slow 5.5 DC digits (1 PLC) Current Range Auto AC Digits 5.5 DC Digits Slow 5.5 (1 PLC) Frequency Range Auto Digits 5.5 Range AUTO and Period Rate Diode Test Medium (100ms) Digits 5.5 Range 1mA Rate 0.1 PLC Slow 5.5 Resistance Digits (1 PLC) (2-wire) Range Auto Slow 6.
2.2 Features Resolution: 6.5 digits. 5*7 dot matrix VFD, dual displays with 3-color annunciators. 11 standard measurement functions & 8 math functions. 4 front ground terminal are connected to Chassis. Stability, Accuracy and Speed (2000RDGS/Sec at 4.5 Digit, 50 RDGS/Sec at 6.5 Digit in 60 Hz) Multi-Points Scanner Card: Up to 10 Channels. (Optional) RTD probe Adapter (optional) convenient to use. Built-in USB and GPIB (Optional) Interfaces. Easy & Free PC applications. 2.
6 7 1 2 3 4 5 Figure 2-15 1. Power & Display: Power: Activates 1201 DMM. Display: Shows model, version & condition by pressing round PREV & NEXT buttons. 2-1. First row without SHIFT button: DCV: Selects DC voltage measurement. ACV: Selects AC voltage measurement. Ω2: Selects 2-wire resistance measurement. FREQ: Selects frequency measurement. CONT: Selects the continuity test. TEMP: Selects RTD temperature measurement. 2-2.
DIGITS: Changes resolution. RATIO: Enables the dcv:dcv ratio function. %: Calculates the ratio to a target value in percentage. MIN/MAX: Captures the minimum or maximum readings from the measurement. NULL: Activates the offset function in order to get the real measured reading. 2-4. Second row with SHIFT button: STEP: Scans from a channel to the next channel in delayed action when using the scanner card. SCAN: Enables scanning function when using the scanner card.
measuring. 3-2. The second row in SETUP section: ESC: Cancels selection, moving back to measurement display. ENTER: Accepts selection, moving to next choice or back to measurement display. LOCK: Presses SHIFT then ESC button to prevent unpredictable operation on the panel. In order to release lock condition, please press ESC again. 3-3. The third row in SETUP section: CONFIG: Offers setting or adjusting function, relating some front panel buttons.
Figure 2-16 2.3.2 The Display 1201 has a 5x7 dot matrix, dual-display with three-color (White, Red and Yellow) annunciators for a better view. There are two rows in the dual-display screen. The upper row displays readings and units. A maximum 13 characters are allowed for upper row dot-matrix display. The lower row displays range of the measurements, condition or information about an ongoing configuration. A maximum 16 characters are allowed for lower row dot-matrix display.
2.3.2.1 Annunciators at Upper Side Figure 2-18 ADRS: Indicates the multimeter is controlled via GPIB Interface. RMT (REMOTE): Indicates the remote state. (USB Interface) MAN: Indicates the manual range is taken. TRIG: Shows the single triggering is enabled. HOLD: Indicates reading hold function is enabled. MEM: Indicates the using of internal memory. RATIO: Indicates the dcv:dcv ratio operation. MATH: Indicates the “MATH” operation is taken. ERR: Error occurs.
2.3.3 The Rear Panel The rear panel of the 1201 is shown in Figure 2-20. This figure includes important abbreviated information that should be reviewed before using the instrument. 7 6 1 2 34 5 Figure 2-20 1. Inserted Connections & Fuse Device: HI & LO: Used for all measurements, except AC & DC current and temperature. LO & I: Used for making DC and AC current measurements. Rear Fuse: Secures your Meter against damage of strong current pulse. 2.
line voltage setting. Configured for line voltages of 100/220V or 120/240V. (Depend on the power utility in your area.) 6. Option Slot: Designed for installing an optional multi-point scanner card (Model: 1201-opt01). 7. Option GPIB/IEEE488 Connection: Connects a remote computer with an IEEE488 cable for changing operation environment instead of the front panel control (Model: 1201-opt04).
3 Basic Measurement Function This chapter introduces some basic measurement functions in 1201. You will learn how to use your 1201 multimeter to measure voltage, current, resistance, frequency, period, continuity, diode and temperature in this chapter. 3.1 Voltage Measurements (DC & AC) The ranges for DC voltage measurements in 1201 are 100mV, 1V, 10V, 100V and 1000V. For AC voltage measurements, the ranges are 100mV to 750V AC-Coupled TRMS, or 1000V peak.
⑥ Connect test leads to your source signal and observe the reading shown on the display. If the input signal is beyond the allowed range, an overflow message “OVLD” will be displayed. 2 6 4 5 1 3 Figure 3-1 2 6 4 5 1 3 Figure 3-2 ※ Note: The rear panel terminals can also be used via the same procedures as the front panel terminals. (Refer to Figure 3.
Figure 3-3 3.2 Current Measurements (DC & AC) The ranges for DC current measurements in 1201 are 10mA, 100mA, 1A and 3A. For AC current measurements, the range is 1A with a sensitivity of 1 μA to 3A AC-Coupled TRMS with a sensitivity of 10μA. Figure 3-4 and 3-5 show you how to measure DC/AC currents in 1201. Warning! The maximum input current allowed is 3A, 250V. Do not apply excess current to your meter to avoid damaging the fuse of current input.
panel or use △ and ▽ buttons to select desired range. ⑥ Connect test leads to your source signal and observe the reading shown on the display. If the input signal is greater than the allowed range, an overflow message “OVLD” will be displayed. 6 2 4 5 1 4 3 Figure 3-4 ※ Note: The rear terminal panel also can be used via the same procedures as the front panel.
3.3 Resistance Measurements (2 & 4-wire) The ranges for resistance measurement are 100 Ω, 1KΩ, 10kΩ, 100kΩ, 1MΩ, 10MΩ, and 100MΩ, with a sensitivity of 100 μΩ (on 100 Ω range.) There are two modes for measuring the resistance: 2-wire mode as shown in Figure 3-6 and 4-wire mode as shown in Figure 3-7.
6 2 4 5 1 3 Figure 3-6 6 2 4 5 1 3 Figure 3-7 ※ Note: The rear terminal panel also can be used via the same procedures like the front panel as shown in Figures 3-8 and 3-9.
Figure 3-8 Figure 3-9 3.4 Frequency & Period Measurements 1201 uses an on-board counter with 25MHz to measure the frequency (period). The measurement band is from 3Hz to 300kHz (or 333 ms to 3.3 μs) and the measurement voltages range from 100mV to 750 V in AC. The default for “RANGE” is auto-range. Warning! The maximum input allowed is 1000V. Applying excess voltage may damage your meter. How to measure frequency and period ① Selects input signal connections on front or rear panel.
③ Set RESOLUTION (Refer to 4.1.1) and INPUT JACK. Or skip this step if default is to be used. ④ Press FREQ button for frequency measurement or SHIFT + FREQ buttons for period measurement. ⑤ Select the auto-range function by pressing AUTO button on the front panel or use △ and ▽ buttons to select the desired range. ⑥ Connect test leads to your source signal and observe the reading shown on the display. If the input signal is beyond the allowed range, an overflow message “OVLD” will be displayed.
value. 5 4 1 2 3 Figure 3-10 3.6 Diode Measurements 1201 uses a current source of 1 mA for diode testing. The maximum resolution is 10 μV on a fixed range of 1 V DC. The default threshold voltage is fixed between 0.3 and 0.8 volts and the reading rate is fixed at 0.1 PLC (The voltage bound is adjustable from 0.01V up to 1.2V.). A “Beep” sound will appear when the diode measured value is in the range.
2 4 1 4 3 Figure 3-11 3.7 Temperature Measurements The 1201 supports thermocouples and resistance temperature detector (RTD) types of probes. For thermocouples, 1201 supports 7 types: E, J, K, N, R, S and T. Please refer to Table 3-1 for their temperature ranges. Be sure that the temperature function is configured for the right sensor type before making measurements (Refer to 4.1.8 for how to make the sensor configuration).
Sensor Type Temperature Temperature Range(°C) Range(°F) E -270~1000 -518~1832 J -210~1200 -140~2192 S -50~1768 -122~3236 T -270~400 -518~752 RTD (PT 100) -200~850 -392~1562 Table 3-1 3.7.1 Thermocouple Measurements Connect the thermocouple adapter to the banana jacks on the front panel. The difference between each type is subject to the patch thermal leads. ※ Note: Only connection via the front panel can be used for temperature measurements.
④ Press SHIFT + TEMP buttons. ⑤ Take the reading on the display. 5 4 3 1 2 Figure 3-12 3.7.2 RTD Measurements There are three kinds of temperature measurements with RTDs: 2-wire, 3-wire and 4-wire measurements. You will find connection instructions and measuring procedures in the following sections. 3.7.2.1 2-Wire RTD Measurements How to measure temperature with 2-Wire RTD The following Figure 3-13 shows theory diagram of 2-Wire RTD measurement. ① Use terminals switch to select front terminals.
2 5 4 1 3 Figure 3-13 1 2 3 4 5 46
Figure 3-14 3.7.2.2 3-Wire RTD Measurements How to measure temperature with 3-Wire RTD The following Figure 3-15 shows theory diagram of 3-Wire RTD measurement. ① Use terminals switch to select front terminals. ② Insert a specified adapter into the front terminals. Connect the low thermal patch leads to the adapter as shown in Figure 3-16. ③ Configure sensor type as you would be with 4-wire RTD and unit using CONFIG + TEMP and ◁ or ▷. When ready, press ENTER button. ④ Press TEMP button.
5 5 2 4 1 3 Figure 3-15 1 2 3 4 5 48
Figure 3-16 3.7.2.3 4-Wire RTD Measurements How to measure temperature with 4-Wire RTD The following Figure 3-17 shows theory diagram of 4-Wire RTD measurement. ① Use terminals switch to select front terminals. ② Insert a specified adapter into the front terminals. Connect the low thermal patch leads to the adapter as shown in Figure 3-18. ③ Configure sensor type and unit using CONFIG + TEMP and ◁ or ▷. When ready, press ENTER button. ④ Press TEMP button.
2 5 5 4 1 3 Figure 3-17 1 2 3 4 50
5 Figure 3-18 51
4 Front Panel Operations This chapter contains information about how to change the parameters and settings for your measurements and all the details about each feature and function. 4.1 Measurement Configuration The following information will guide you through ways to configure measurement functions.
Defaults The default settings for Auto Zero and Auto Gain are enabled. The user selected values for Auto Zero and Auto Gain are stored in a volatile memory and the default settings will be restored when the meter is power-off. How to set Auto Zero and Auto Gain You can change the Auto Zero and Auto Gain setting through the front panel or through the remote interface operation. Front Panel Operation The following steps show how to set Auto Zero and Auto Gain directly through the front panel.
Fast 5 ½ digits Off Off 0.1 Slow 5 ½ digits On On 1 Fast 6 ½ digits On On 1 Slow 6 ½ digits On On 10 Table 4-1 ※ Note: To change resolution, refer to Section 4.1.3: Resolution Setting in this chapter. Figure 4-1 Remote Interface Operation To set Auto Zero and Auto Gain through the remote interface, use the following commands: SENSe:ZERO:AUTO {OFF|ONCE|ON} SENSe:GAIN:AUTO {OFF|ONCE|ON} The OFF and ONCE parameters have a similar effect.
4.1.2 Filter Filter is used to remove noises in measurement readings. equipped with two types of filters: AC filter and digital filter. for AC measurements only. 1201 is AC filter is It also affects the speed of the multimeter to yield a measurement reading. Digital filter further stabilizes the measurement readings by averaging. Both of them are described in detail in the subsequent sections respectively. 4.1.2.
Front Panel Operation Press CONFIG + ACV button. Use ◁ and ▷ buttons to locate “BAND WIDTH” submenu, and then press ENTER to select it. Look for the desired bandwidth using ◁ and ▷ buttons. Then press ENTER on your selection. There are three options: 3Hz, 20Hz and 200Hz. The locations of these buttons are shown with red rectangle frames in Figure 4-2.
the stack. In the repeating average mode, the multimeter waits for the measurement reading stack to fill up and then take an average to produce a reading for display. It then flushes the stack and starts over with an empty stack. Consequently, the repeating digital filter yields one reading for display every specified number of measurement readings. Digital filter is not available for diode, continuity, frequency and period measurements.
SENSe:AVERage:COUNt {|MINimum|MAXimum} SENSe:AVERage:COUNt? [MINimum|MAXimum] SENSe:AVERage:STATe {OFF|ON} SENSe:AVERage:STATe? 4.1.3 Resolution Setting (Digits) Definition Resolution is the number of digits a multimeter can measure. User can select the resolution for a specific measurement. The choices for the resolution setting are: fast 4.5, slow 4.5, fast 5.5, slow 5.5, fast 6.5 and slow 6.5. For a higher accuracy, user can select 6.5 digit resolution.
Front Panel Operation There are two ways to set the resolution. The locations of the buttons are shown with red rectangle frames in Figure 4-3. A. First select your desired measurement function by pressing one of the function buttons located on the first row of your meter's front panel. Press DIGITS button to select your desired resolution for your measurement. User can press DIGITS button several times to see how the resolution setting changes from 4.5, 5.5 to 6.5.
Remote Interface Operation Use the following commands on your PC terminal to set the resolution for your measurement. CONFigure: , MEASure:? , SENSe::RESolution 4.1.4 DC Input Resistance Definition To reduce the effect of loading errors due to the input resistance, 1201 allows user to select a much larger input resistance (> 10G Ω) for low input DC voltage (100mV, 1V and 10V) measurements.
Figure 4-4 Remote Interface Operation The automatic input resistance mode can be enabled / disabled. With AUTO OFF (default), the input resistance is fixed at 10MΩ for all ranges. With AUTO ON, the input resistance is set to >10GΩ for the three lowest DC voltage ranges (100mV, 1V and 10V). Use the following command from your PC terminal to disable the auto input DC resistance setting (the result is a fixed input DC resistance at 10M Ω for all measurements.) INPut:IMPedance:AUTO {OFF | ON} 4.1.
Press CONFIG button and then CONT button. Use ◁ and ▷ buttons to move through the digits and lower or increase the number to your desired value using △ and ▽ buttons , then press ENTER button to set the value. The locations of these buttons are shown with red rectangle frames in Figure 4-5. + Figure 4-5 4.1.
How to set the auto / manual range: You can set the auto / manual range either through the front panel operation or through the remote interface operation. Front Panel Operation First choose a measurement function on the front panel, then press “AUTO” button to select auto-range feature. Or use △ and ▽ buttons to manually select a range. If selected range is not shown on the bottom of the display, press round PREV or NEXT buttons until the range information appears.
noise rejection and the accuracy of the measurement. The unit of the integration time is in PLC (power line cycles). One PLC for 60 Hz is 16.67 ms, and for 50 Hz is 20 ms. There are 4 different integration times in 1201 for user to select from: 0.02, 0.1, 1 and 10 PLCs. Default For DCV, DCI, and resistance measurement, the default integration time is 1 PLC. The user selected value is stored in a volatile memory and the default value will be restored when the meter is power-off.
SENSe:FRESistance:DC:NPLCycles {0.02|0.1|1|10|MINimum|MAXimum} SENSe:FRESistance:DC:NPLCycles? [MINimum|MAXimum] For frequency and period measurements, aperture time (or gate time) is analogous to integration time, and you can use the following commands to set it. Specify 10 ms (4.5 digits), 100 ms (default; 5.5 digits), or 1 second (6.5 digits). SENSe:FREQuency:APERture {0.01|0.1|1|MINimum|MAXimum} SENSe:FREQuency:APERture? [MINimum|MAXimum] SENSe:PERiod:APERture {0.01|0.
NTCT 0.003850 0.10863 1.49990 100Ω Table 4-3 Here is the temperature equation that is used to determine the RTD temperature: When t 0 C : Rt R0 1 At Bt 2 Ct 3 t 100 When 0C t 630C : Rt R0 1 At Bt 2 Where: A 1 100 B 10 4 C 10 8 If you are using SPRTD(Standard Platinum RTD), select SPRTD and specify the seven coefficients under SPRTD submenu.
You can set up the RTD configuration either through the front panel operation or through the remote interface operation. Front Panel Operation If you are using RTD, press CONFIG and then TEMP. Use ◁ and ▷ to locate SENSOR submenu. Press ENTER to go to the submenu. Use ◁ and ▷ to locate your sensor type Press ENTER to select your desired sensor type. Choosing USER takes you to a menu where you can specify factors used in the calculation equation to obtain the temperature.
Definition If you are using the thermocouple, the options are: type E, J, K, N, R, S and T. After selecting your thermocouple type, you need to configure the reference junction also. Typically, each thermocouple card uses one reference junction. If the junction type is simulated, the defined simulated junction temperature is used. If the junction type is real, you need to close that channel from the scanner card before acquiring the temperature.
4.1.9 Remote Interface Selection The multimeter supports both GPIB and USB interfaces, but only one interface can be activated at a time. If you are using GPIB, you must set the address for the multimeter. You can set the address to any value from 0 and 31. The address is set to “11” when the multimeter is shipped from the factory. ※ Note: The remote interface can only be set through the front panel operations. How to select a remote interface Press MENU and then use ◁ and ▷ to select INTERFACE.
“TERMINALS” switch button on the front panel. Please see the following figure for the location of the switch. The location of the button and terminals is shown with a red rectangle frame in Figure 4-7. Figure 4-7 4.2 Trigger Operations In this section we will discuss the triggering system in 1201. 1201 provides a variety of trigger operations for user. User can select a trigger mode, a trigger source and different trigger settings for a specific measurement.
There are three trigger modes in 1201: auto, immediate, and single triggering. User can specify the trigger mode for their measurement. The factory default is auto triggering when the meter is power-on. A. Auto Triggering Mode (Front Panel Operation only) Definition Auto triggering takes continuous readings at a fastest rate possible for the present measurement. The rate of taking readings depends on the current settings. This function is only available through the front panel.
immediate trigger. TRIGger:SOURce IMMediate C. Single Trigger Mode (accessible only through the front panel) Definition Single trigger mode takes one reading (or specified number of readings) each time when user presses SINGLE key. (Please refer to 4.2.3 for setting the number of samples on each trigger.) When the TRIG annunciator on the display is lit, the meter is ready for next trigger event. The single trigger mode is only available through the front panel operations.
In 1201, user can specify the trigger source to be one of these three options: front panel operations, external hardware trigger source and remote interface operations. Front Panel Operation Use the front panel buttons - AUTO TRIGGER for auto triggering and SINGLE for single triggering. External Hardware User applies a trigger pulse to the Ext TRIG (BNC) terminal on the rear panel. External hardware triggering is like using single trigger but the trigger source is an external hardware.
number of samples per trigger, the number of triggers per event, reading hold, and the trigger delay for their measurements. A. Number of samples on each trigger By default, the multimeter takes only one reading on each trigger, but you can instruct the multimeter to take specific number (up to 50000) of readings each time it receives a trigger. The user’s input setting is stored in a volatile memory which will be cleared after the meter has been turned off and the default value will be restored.
SAMPle:COUNt B. Number of triggers Although the meter normally takes one trigger before returning to the “idle” state, user can manually specify the number of triggers it accepts before the “idle” state. However, this can only be done through the remote interface. The following command show how to set multiple triggers per returning idle state. TRIGger:COUNt C. Reading hold The reading hold feature is used to hold a stable reading on the display.
system is called the “settling time.” The settling time depends on the measurement range, cable properties and signal source. Defaults The default of the trigger delay is automatic. 1201 automatically selects a delay time for you according to the setting of the measurement if you do not specify a delay. A list of the default for each measurement function is shown on Table 4-4. The range for the delay is from 0 to 3600 seconds.
Measurement Function Setting Trigger Delay Time PLC >= 1 1.5 ms PLC < 1 1.0 ms 100Ω ~ 100kΩ 1.5 ms 1 MΩ 15 ms 10 MΩ ~ 100 MΩ 100 ms 100Ω ~ 100kΩ 1.0 ms 1 MΩ 10 ms 10 MΩ ~ 100 MΩ 100 ms 3 Hz 7.0 s 20 Hz 1.0 s Single Trigger) 200 Hz 600 ms ACV/ACI 3 Hz 1.5 s (Front Panel w/ Auto 20 Hz 200 ms 200 Hz 100 ms DCV/DCI Ω2 and Ω4 (PLC >= 1) Ω2 and Ω4 (PLC < 1) ACV/ACI (Remote Interface/ External Trigger/ Trigger On) Remote Interface / External 1.
locate “TRIG” option. Press ENTER to select it. Then again find “DELAY” option using ◁ and ▷ buttons. Press ENTER to select it. Then use ◁ and ▷ buttons to move through the digits and △ and ▽ buttons to set the desired delay time (between 0 to 3600 second). The locations of the buttons are shown with red rectangle frames in Figure 4-13. Figure 4-13 Remote Interface Operation You can also use the remote interface operations from your PC terminal to set the trigger delay.
※ Note: Press RATIO button, the “RATIO” anunnciator will be lit on the display. 4.3.1 Ratio This function calculates the ratio of an input DC voltage to a reference DC voltage according to the following equation: How to make a ratio measurement There are two ways to make a ratio measurement: Through the front panel operation or through the remote interface operation. Front Panel Operation Use TERMINALS button to select the front terminals or the rear terminals.
Figure 4-14 Remote Interface Operation Use the following command to make a RATIO measurement. CONFigure:VOLTage:DC:RATio{|MIN|MAX|DEF},{|MIN|MAX|DEF} 4.3.2 % (Percent) Definition This mathematical function calculates the ratio of a measurement reading to a specified target value as the form of percentage. The calculation formula is shown below: The specified target value is store in a volatile memory and will be cleared after the meter has been turned off or a remote interface reset.
and △ and ▽ buttons to increase or decrease the numbers to a desired target value. Press ENTER to set the value. Press % to activate this function. And then observe the calculated percent value on the display as shown as Figure 4-15. ※ Note: Press % again to disable this function. The “MATH” annunciator on the display indicates the state of a mathematical feature.
and will be cleared when the meter is turned off, or when the MIN/MAX is turned on, or after a remote interface reset. The meter beeps every time when it captures a new minimum or maximum. How to use Min/Max You can use the Min/Max feature either through the front panel operation or the remote interface operation. Front Panel Operation User first selects the measurement function they wish to use, and then press MIN/MAX button to enable the Min/Max function.
CALCulate:AVERage:MINimum? CALCulate:AVERage:MAXimum? CALCulate:AVERage:AVERage? CALCulate:AVERage:COUNt? 4.3.4 Null Definition When null function is enabled, the displayed measurement reading is the difference between the measured input signal reading and the stored null (also called relative) value. The null (relative) value is stored in a volatile memory and the value will be cleared when the multimeter is power-off. Moreover, user can specify or alter a null value.
Figure 4-17 The Remote Interface Operation You can use the following commands on your PC terminal to make a null measurement. CALCulate:FUNCtion NULL CALCulate:STATe {OFF|ON} CALCulate:STATe? CALCulate:NULL:OFFSet {|MAXimum|MINimum} 4.3.5 Limits Test The limits testing operation allows user to adjust a maximal and a minimal limit values. The multimeter beeps and an “HI” or “LO” message will be shown when the reading exceeds the upper or lower limit respectively.
limit you wish to set. Then use ◁ and ▷ to move through the digits and △ and ▽ to increase or decrease the numbers to a desired value. Press ENTER to set the value. The locations of the buttons are shown with red rectangle frames in Figure 4-18. Figure 4-18 How to make a limit testing The locations of the buttons are shown with red rectangle frames in Figure 4-19. Select a measurement function for purpose except continuity and diode. Enable the limit operation by pressing SHIFT + RATIO buttons.
Figure 4-19 Remote Interface Operation Use the following commands to enable the limits function or to set the limits: CALCulate:FUNCtion LIMit CALCulate:STATe {OFF|ON} CALCulate:STATe? CALCulate:LIMit:LOWer {|MINimum|MAXimum} CALCulate:LIMit:UPPer {|MINimum|MAXimum} 4.3.6 MX+B Definition This mathematical function multiplies a measurement reading (X) by a specified scale factor (M) and add an offset (B) automatically.
and B. Press ENTER on your selection. Then use ◁ and ▷ to move through the digits and use △ and ▽ to increase or decrease the number to a desired value. Press ENTER to set the value. User needs to set the values of M and B first. Then Select a measurement function and press SHIFT + % to activate MX+B function as shown as Figure 4-20.
calculation of dB is listed below: V dB 20 log( in Vref ) or dB = (Input signal in dBm) – (relative value in dBm) ※ NOTE: The Vin is the input signal and the Vref is the relative reference. The dB measurement is applied to DC and AC voltage only. The relative value is adjustable and is stored in a volatile memory. The range for the relative value is between 0 dBm and 200 dBm.
Observe the displayed reading. Figure 4-22 shows the locations of these buttons with red rectangle frames. ※ Note: Press SHIFT+NULL again to disable this feature. The “MATH” anunnciator on the display indicates the state of a mathematical feature. or Figure 4-22 Remote Interface Operation Use the following commands from your PC terminal to make the dB measurement: CALCulate:FUNCtion DB CALCulate:STATe {OFF|ON} CALCulate:STATe? CALCulate:DB:REFerence {|MINimum|MAXimum} B.
reference value. The Zref is adjustable with a range from 50Ω to 8000 Ω. The default value is 600 Ω. The user selected reference value is stored in a volatile memory and will be cleared after the multimeter has been power-off. This feature is available for DCV and ACV only. How to set the reference resistance User can set the reference resistance either through the front panel operation or the remote interface operation.
resistance is 600 Ω. The locations of the buttons are shown with red rectangle frames in Figure 4-24. ※ Note: Press SHIFT+MIN/MAX again to disable this feature. The “MATH” anunnciator on the display indicates the state of a mathematical feature. or Figure 4-24 Remote Interface Operation Use the following commands to enable dBm feature or to set the reference resistance: CALCulate:FUNCtion DBM CALCulate:STATe {OFF|ON} CALCulate:STATe? CALCulate:DBM:REFerence {|MINimum|MAXimum} 4.
allowed for upper row dot-matrix display and a maximum 16 characters are allowed for lower row dot-matrix display as shown on Figure 4-25. User has an option to turn off the display for a faster measurement without waiting for display, or when the measurement is done through the remote interface operations on their PC terminal. Figure 4-25 When the display is turned off, an “OFF” will be lit at the lower right corner of the display screen.
and ▷ buttons. Press ENTER on your selection. The locations of the buttons are shown with red rectangle frames in Figure 4-26. Procedures: MENU → SYSTEM → DISPLAY → {ON|OFF} Figure 4-26 Remote Interface Operation The following commands show how to control the display as well as how to send a message to the display: DISPlay {OFF|ON} (turns off or turns on the display) DISPlay:TEXT (displays the string you type in) DISPlay:TEXT:CLEar 4.4.
the test voltage is within the limits in diode testing. the source signal fails the limit testing. After the beeper is disabled, the meter still emits a tone when: an error occurs. any button on the front panel is pressed. the threshold value is exceeded in continuity testing. Default The beeper is enabled when it is shipped from the factory. How to control the beeper User can control the beeper from either the front panel operation or the remote interface operation.
The following commands show how to use the remote interface operation to disable or enable the beeper: SYSTem:BEEPer SYSTem:BEEPer:STATe {OFF|ON} 4.4.3 Reading Memory (Store & Recall) 1201 has a memory capacity of 2000 readings. The readings are stored in first-in-first-out order and the memory type is volatile, which means the stored readings will be cleared when the multimeter is power-off.
※ Note: The MEM annunciator will be lit while the multimeter stores readings and be turned off when the specified number of readings is reached. Procedures: CONFIG +STORE→ Figure 4-28 To recall the stored readings, use the following steps: Press RECALL button, and the multimeter will display all the stored readings starting from the first reading. Use ◁ and ▷ or ▽and △ buttons to move from the first reading to the last reading the meter has stored.
or retrieve readings in the memory. In addition, the number for STORE function only can be set through front panel. INITiate (This command tells the meter to be on “wait-for-trigger” state. After a measurement is taken, measurement readings will be placed in the memory.) FETCh? (Use this command to retrieve stored readings.) DATA:POINts? (Use this command to query the number of stored readings.) 4.4.4 Sensitivity Band (Hold) The reading hold function captures and holds a stable reading on the display.
Figure 4-30 4.4.5 Scanning (Scan) User can purchase an optional internal scanner card to be used with 1201 as the following picture shown. This multipoint scanner card lets you switch and scan up to 10 channels of input signals. User can open and close individual channels, set scan count and scan interval, store measurement readings and activate measuring through channels defined with different measurement functions. The measurements are taken through all defined channels in sequence.
※ Note: The output 2 is only for 4-wired resistance measurement. Please refer to the above picture for more connection information. When you use 4-wired resistance measurement with scanner card, please note that the channel 1 is relative to the channel 6, channel 2 to channel 7 and so on. ※ Note: Setting range of scanner card is only limited on DCV, DCI, ACV, ACI and Resistance functions.
DC Signals: 110V DC, 1A switched, 30VA maximum (resistive load). AC Signals: 125V AC rms or 175V AC peak, 100kHz maximum, 1A switched, 62.5VA maximum (resistive load). Contact Life: >100000 operations at maximum signal level; >100000000 operations cold switching. Contact Resistance: <1ohm at end of contact life. Actuation Time: 5ms maximum on/off. Contact Potential: <±500nV typical per contact, 1μV max. <±500nV typical per contact pair, 1μV max. Connector Type: Screw terminal, #22 AWG wire size.
Mix function (VDC+2WRES) (Slow 5.5 & Fast 6.5) 1 105 19.0 (Slow 6.5) 10 408 4.9 NPLC Take Time with 2000 Readings(sec) rate(ch/s) (Fast 4.5) 0.02 306 6.5 (Slow 4.5 & Fast 5.5) 0.1 318 6.3 (Slow 5.5 & Fast 6.5) 1 442 4.5 (Slow 6.5) 10 1710 1.2 How to program each channel with measurement function Press CONFIG + SHIFT + DIGITS for scanning configuration. Use ◁ and ▷ to scroll through submenus. Press ENTER on “SET SCAN CHA” submenu.
The locations of the buttons are shown with red rectangle frames in Figure 4-31. Figure 4-31 4.4.6 Stepping (Step) Stepping is scanning with a specified time delay between taking input signal through the defined channels. ※ Note: Setting range of scanner card is only limited on DCV, DCI, ACV, ACI and Resistance functions. How to program each channel with measurement function Press CONFIG + SHIFT + FILTER for scanning configuration. Use ◁ and ▷ to scroll through submenus.
STORE option, you can select ON to instruct the meter to store the measurement results for later retrieving or select OFF. Press ENTER to set the value. How to open and close the channels Press CONFIG + SHIFT + FILTER for scanning configuration. Use ◁ and ▷ buttons to scroll through submenus. Press ENTER on “----” when you need to close a specific channel. Press ENTER again on “CHANNEL”. Use ◁ and ▷ to move through the digits and △and ▽ to increase or decrease the numbers to the desired channel number.
7 MX+B Values: M, B 8 Reading Hold Sensitivity Band 9 Input R DC Input Resistance 10 Interface 11 System USB、GPIB ADDR、RS232 baud & parity Language、Beep、IDN string Table 4-5 How to save the settings Press MENU and then use ◁ and ▷ to locate “SYSTEM” submenu. Press ENTER to select it. Again use ◁ and ▷ to locate “INIT MODE” submenu, and then press ENTER to select it. Use ◁ and ▷ to switch from “SAVE DATA” and “DEFAULT”.
Figure 4-34 4.4.9 Error Condition The error annunciator on the front panel display tells about the error condition of the multimeter. If there are one or more syntax or hardware errors found, the error annunciator will be lit to inform user. The multimeter stores errors using the first-in-first-out (FIFO) order and it records up to 20 errors in the error queue. The first error detected will be the first error retrieved. Refer to Chapter 6 for the list of error messages. 1.
Figure 4-35 4.4.10 Firmware Revision 1201 has three microprocessors for various internal systems. You can query the multimeter to determine which revision of firmware is installed for each microprocessor. How to check the firmware revision Press MENU and then use ◁ and ▷ to locate “SYSTEM” submenu. Press ENTER to select it. Again use ◁ and ▷ to locate “REVISION” option. Press ENTER to select it. The multimeter gives three numbers in xx-xx-xx format on the display.
4.4.11 Calibration 1201 will show the latest calibrated date and the next calibration date on the display after following the operation below. The location of the buttons is shown with red rectangle frames in Figure 4-37. How to see the calibration information Press MENU then locate “CALIBRATE” option using ◁ and ▷. Press ENTER to select it. Use ◁ and ▷ to switch from the last calibrated date and the next calibration date. Figure 4-37 4.4.
Warning! Erroneous self-test failures may occur if the setting of power line voltage is incorrect. Errors may also occur because of signals present on the input terminal (front and rear) during self-test procedure. Long test leads can act as an antenna causing pick-up of ac signals. How to execute Self-test Users may execute a complete self-test by front panel operation. This test procedure provides more tests for the hardware of 1201 than the power-on tests.
Communication must function in both directions for this test to pass. 602 RAM read/write failed This test writes and reads a 55h and AAh checker board pattern to each address of ram U1701. Any incorrect read back will cause a test failure. This error is only readable from the remote interface. 603 Front-End MCU does not respond The main CPU U1601 attempts to establish serial communications with the front-end processor U2001. Communication must function in both directions for this test to pass.
input. The 500nA ohms current source is connected to produce a nominal 5V signal. A 20ms ADC measurement is performed and the result is checked against a limit of 5V 1V. 613 Ohms 5 uA source failed This test configures to the 1000V dc range with the internal 10M 100:1 divider R204 connected across the input. The 5 A ohms current source is connected. The compliance limit of the current source is measured. A 20ms ADC measurement is performed and the result is checked against a limit of 0.12V 0.01V.
619 Ohms 1 mA source failed his test configures to the 1000V dc range with the internal 10M 100:1 divider R204 connected across the input. The 1mA ohms current source is connected. The compliance limit of the current source is measured. A 20ms ADC measurement is performed and the result is checked against a limit of 0.12V 0.01V. 620 AC rms zero failed This test configures for the 100mV ac range with the ac input grounded.
5 Remote Interface Operations 1201 supports two remote interfaces: the built-in USB and optional GPIB (IEEE-488). With GPIB, you will need a GPIB interface card. This chapter lists the SCPI (Standard Commands for Programmable Instrument) commands available to control the multimeter. For the first time to use SCPI, users would better to refer to Appendix B. for SCPI reference. 5.1 Pass/Fail Output From USB Connector The USB connector on the rear panel of 1201 is a series “B” connector.
Number Assignment 1 VBUS Red Floating 2 D- White Limit Test Pass 3 D+ Green Limit Test Fail 4 GND Black GND Table 5-1 If you disable the USB interface, the Pass/Fail output function will enable automatically. Please follow the procedure below to enable/disable this function.
※ Note: The icons, pictures and words will be changed or edited with different versions without informing. 1 2 Figure 5-1 3 Figure 5-2 Figure 5-3 How to set up for GPIB interface Insert GPIB interface card into the interface slot on the rear panel. Install the 1201 application in your PC and execute the program. Click Tool tab for Command Control, then type in your command. The icons and buttons are shown with red rectangle frames in Figures 5-1, 5-2 and 5-3. 5.
automatically sets the other parameters for you, make the measurement and send the result to the output buffer.
DIODe TCOuple TEMPerature CONFigure? The READ? Command The READ? Command changes the state of the trigger system from the “idle” state to the “wait-for-trigger” state. When the specified trigger condition requirements are met after the multimeter receives the READ? command, the measurement will be initiated. The results are sent to the output buffer right away. You must enter the reading data into your bus controller or the multimeter will stop making measurements when the output buffer fills.
[SENSe:] FUNCtion “VOLTage:DC” FUNCtion “VOLTage:DC:RATio” FUNCtion “VOLTage:AC” FUNCtion “CURRent:DC” FUNCtion “CURRent:AC” FUNCtion “RESistance” (2-wire Ω) FUNCtion “FRESistance” (4-wire Ω) FUNCtion “FREQuency” FUNCtion “PERiod” FUNCtion “CONTinuity” FUNCtion “DIODe” FUNCtion “TCOuple” FUNCtion “TEMPerature” FUNCtion? [SENSe:] VOLTage:DC:RANGe {|MINimum|MAXimum} VOLTage:DC:RANGe? [MINimum|MAXimum] VOLTage:AC:RANGe {|MINimum|MAXimum} VOLTage:AC:RANGe? [MINimum|MAXimum] CURRent:DC:RANGe {
VOLTage:AC:RANGe:AUTO {OFF|ON} VOLTage:AC:RANGe:AUTO? CURRent:DC:RANGe:AUTO {OFF|ON} CURRent:DC:RANGeAUTO? CURRent:AC:RANGe:AUTO {OFF|ON} CURRent:AC:RANGe:AUTO? RESistance:RANGe:AUTO {OFF|ON} RESistance:RANGe:AUTO? FRESistance:RANGe:AUTO {OFF|ON} FRESistance:RANGe:AUTO? FREQuency:VOLTage:RANGe:AUTO {OFF|ON} FREQuency:VOLTage:RANGe:AUTO? PERiod:VOLTage:RANGe:AUTO {OFF|ON} PERiod:VOLTage:RANGe:AUTO? [SENSe:] VOLTage:DC:RESolution {|MINimum|MAXimum} VOLTage:DC:RESolution? [MINimum|MAXimum] VOLTage
TCOuple:RJUNction:SIMulated? TCOuple:RJUNction:REAL:OFFSet {|MINimum|MAXimum} TCOuple:RJUNction:REAL:OFFSet? [MINimum|MAXimum] [SENSe:] TEMPerature:RTD:TYPE {PT100|D100|F100|PT385|PT3916|USER|SPRTD|NTCT} TEMPerature:RTD:TYPE? TEMPerature:RTD:RZERo {|MINimum|MAXimum} TEMPerature:RTD:RZERo? [MINimum|MAXimum] TEMPerature:RTD:ALPHa {|MINimum|MAXimum} TEMPerature:RTD:ALPHa? [MINimum|MAXimum] TEMPerature:RTD:BETA {|MINimum|MAXimum} TEMPerature:RTD:BETA? [MINimum|MAXimum] TEMPerature:
FRESistance:NPLCycles {0.02|0.1|1|10|MINimum|MAXimum} FRESistance:NPLCycles? [MINimum|MAXimum] [SENSe:] FREQuency:APERture {0.01|0.1|1|MINimum|MAXimum} FREQuency:APERture? [MINimum|MAXimum] PERiod:APERture {0.01|0.
ROUTe:OPEN ROUTe:STATe? ROUTe:SCAN:FUNCtion ,{|“VOLT:DC”|“VOLT:AC”| “FREQuency”|“RESistance”|“FRESistance”|“NONE”} ROUTe:SCAN:FUNC? ROUTe:SCAN:TIMER? ROUTe:SCAN:TIMER ROUTe:SCAN:COUNT? ROUTe:SCAN:COUNT ROUTe:SCAN:STATe? ROUTe:SCAN:SCAN ROUTe:SCAN:STEP MATH OPERATION Commands There are eight math operations. Only one of them can be enabled at a time. They either store data for later use or perform mathematical operations on the readings.
AVERage:AVERage? AVERage:COUNt? CALCulate: NULL:OFFSet {|MINimum|MAXimum} NULL:OFFSet? [MINimum|MAXimum] CALCulate: LIMit:LOWer {|MINimum|MAXimum} LIMit:LOWer? [MINimum|MAXimum] LIMit:UPPer {|MINimum|MAXimum} LIMit:UPPer? [MINimum|MAXimum] CALCulate: MXB:MMFactor {|MINimum|MAXimum} MXB:MMFactor? [MINimum|MAXimum] MXB:MBFactor {|MINimum|MAXimum} MXB:MBFactor? [MINimum|MAXimum] CALCulate: DB:REFerence {|MINimum|MAXimum} DB:REFerence? [MINimum|MAXimum] CALCulate: D
accept the trigger. The multimeter takes immediate internal trigger, a software trigger from a remote interface and external trigger from the rear panel. Then be sure that the multimeter is ready for a trigger (in the “wait-for-trigger” state). The multimeter accepts a trigger only when it is in the “wait-for-trigger” state.
Each system related operation performs a task that is not measurement related but plays an important role in making your measurements.
STATUS REPORTING Commands SYSTem:ERRor? STATus: QUEStionable:ENABle QUEStionable:ENABle? QUEStionable:EVENt? STATus:PRESet *CLS *ESE *ESE? *ESR? *OPC *OPC? *PSC {0|1} *PSC? *SRE *SRE? *STB? Other Interface Commands SYSTem:LOCal SYSTem:REMote IEEE-488.
*RST *SRE *SRE? *STB? *TRG 126
6 Error Messages Errors are retrieved in first-in-first-out (FIFO) order. The first error returned is the first error that was stored. When user has read all errors from the queue, the ERROR annunciator turns off. 1201 beeps once each time an error occurs. Should more than 20 errors have existed, the last error stored in the queue (the most recent error) is replaced with -350, “Too many errors”.
-104 Data type error A parameter type error was found in the command string. -105 GET not allowed A Group Execute Trigger (GET) is not allowed in the command string. -108 Parameter not allowed More parameters were found than needed for the command . -109 Missing parameter Not enough parameters were received for the command. -112 Program mnemonic too long A command header with too many characters was received. -113 Undefined header An invalid command was received.
-148 Character not allowed A discrete parameter was received but a character string or a numeric parameter was expected. -151 Invalid string data An invalid character string was received. -158 String data not allowed A character string was received but not allowed for the command. -160~-168 Block data errors Block data is not acceptable. -170~-178 Expression errors The meter does not accept mathematical expression.
-222 Data out of range A numeric parameter value is out of range. -223 Too much data A character string was too long. -224 Illegal parameter value A discrete parameter was received which was not a valid choice for the command. -230 Data Stale A FETCh? Command was received but the memory was empty. -350 Too many errors The error queue is full. -410 Query INTERRUPTED A command was received which sends data to the output buffer, but the output buffer contained data from a previous command.
531 Insufficient memory There is not enough memory to store the requested number of readings in internal memory using the INITiate command. The product of the sample count (SAMPle:COUNt) and the trigger count (TRIGger:COUNt) must not exceed 512 readings. 532 Cannot achieve requested resolution The multimeter cannot achieve the requested measurement resolution. You may have specified an invalid resolution in the CONFigure or MEASure command.
Appendix This appendix contains the performance specifications of the 1201. It covers the AC, DC, Resistance, Temperature, and Frequency/Period characteristics under a variety of conditions. It also contains the general characteristics and accuracy calculations for your convenience. A lot of efforts are made to make sure these specifications serve your needs for production, engineering and/or research purposes. All specification applies to 1201 unless noted otherwise. A.
Function Range Resolution Shunt 1 Year Resistance (23°C ± 5°C) 10.000000mA 10 nA 5.1Ω 0.050 + 0.020 100.00000mA 100 nA 5.1Ω 0.050 + 0.005 1.000000A 1 uA 0.1Ω 0.100 + 0.010 Current) 3.00000A 10 uA 0.1Ω 0.120 + 0.020 Function Range Resolution Test Current DCI (DC 1 Year (23°C ± 5°C) Resistance 100.0000 Ω 100 uΩ 1 mA 0.010 + 0.004 1.000000 KΩ 1 mΩ 1 mA 0.010 + 0.001 10.00000 KΩ 10 mΩ 100 uA 0.010 + 0.001 100.0000 KΩ 100 mΩ 10 uA 0.010 + 0.001 1.
Frequency and Period Characteristics 5 Accuracy ± (% of reading) Function 6 Range Frequency (Hz) 1 Year 23º C±5º C 3-5 0.10 5-10 0.05 10-40 0.03 40-300K 0.01 100mV Frequency & to Period 750V AC Characteristics 7 Accuracy ± (% of reading + % of range) Function 8 Range Resolution (23°C ± 5°C) 3-5 1.00 + 0.04 5-10 0.35 + 0.04 ACV (AC TRMS Voltage) 100.0000mV 1 Year Frequency (Hz) 0.1 uV 9 5 Specifications are for 6 ½ digits and two hours warm up.
1.000000V To 750.000V 10-20K 0.06 + 0.04 20-50K 0.12 + 0.05 50K – 100K 0.60 + 0.08 100K – 300K 4.00 + 0.50 3-5 1.00 + 0.03 5-10 0.35 + 0.03 10-20K 0.06 + 0.03 20-50K 0.12 + 0.05 1.0 uV To 10 50K – 100K 1mV 1.000000A 1 uV 0.60 + 0.08 100K – 300K 4.00 + 0.50 3-5 1.00 + 0.04 5-10 0.30 + 0.04 10-5K 0.10 + 0.04 3-5 1.10 + 0.06 5-10 0.35 + 0.06 10-5K 0.15 + 0.06 ACI (AC TRMS Current) 11 3.000000A 10 uV 0.1% of range. For 50 KHz to 100 KHz, add 0.13% of range.
B. General Specifications item Power Supply Power Line Frequency Power Consumption Operating Temperature Limitation & description 100V/120V/220V/240V ± 10% 50~60 Hz ± 10% 25 VA peak (16 W average) 5 ℃ to 40 ℃ Maximum relative humidity 80% for Operating Humidity temperature up to 31 ℃ decreasing linearly to 50% relative humidity at 40℃ Storage Temperature Operating Altitude Bench Dimensions (WxHxD) Weight - 40 ℃ to 70 ℃ Up to 2000m 224mm x 113mm x 373mm 4.
C. Remote Interface Reference C.1 An Introduction to the SCPI Language SCPI (Standard Commands for Programmable Instruments) is an ASCII-based instrument command language designed for test and measurement instruments. Refer to “Simplified Programming Overview,” for an introduction to the basic techniques used to program the multimeter over the remote interface. SCPI commands are based on a hierarchical structure, also known as a tree system.
keywords. A colon ( : ) separates a command keyword from a lower-level keyword. Command Format Used in This Manual The format used to show commands in this manual is shown below: VOLTage:DC:RANGe {|MINimum|MAXimum} The command syntax shows most commands (and some parameters) as a mixture of upper- and lower-case letters. The upper-case letters indicate the abbreviated spelling for the command. For shorter program lines, send the abbreviated form. For better program readability, send the long form.
Instead of selecting a specific voltage range, you can substitute MIN to set the range to its minimum value or MAX to set the range to its maximum value. Querying Parameter Settings You can query the current value of most parameters by adding a question mark ( ? ) to the command.
IEEE-488.2 Common Commands The IEEE-488.2 standard defines a set of common commands that perform functions like reset, self-test, and status operations. Common commands always begin with an asterisk ( * ), are four to five characters in length, and may include one or more parameters. The command keyword is separated from the first parameter by a blank space.
“ON” or “1”. When you query a boolean setting, the instrument will always return “0” or “1”. The following command uses a boolean parameter: INPut:IMPedance:AUTO {OFF|ON} String Parameters String parameters can contain virtually any set of ASCII characters. A string must begin and end with matching quotes; either with a single quote or with a double quote. You can include the quote delimiter as part of the string by typing it twice without any characters in between.
C.3 The MEASure? Command MEASure:VOLTage:DC? {|MIN|MAX|DEF},{|MIN|MAX|DEF} Preset and make a dc voltage measurement with the specified range and resolution. The reading is sent to the output buffer. MEASure:VOLTage:DC:RATio? {|MIN|MAX|DEF },{|MIN|MAX|DEF} Preset and make a dc:dc ratio measurement with the specified range and resolution. The reading is sent to the output buffer.
resolution. The reading is sent to the output buffer. For frequency measurements, the meter uses only one “range” for all inputs between 3Hz and 300kHz. With no input signal applied, frequency measurements return “0”. MEASure:PERiod? {|MIN|MAX|DEF},{|MIN|MAX|DEF} Preset and make a period measurement with the specified range and resolution. The reading is sent to the output buffer. For period measurements, the meter uses only one “range” for all inputs between 0.33 seconds and 3.3 μsec.
measurement. The specified range applies to the source signal and autorange is selected for the reference signal. CONFigure:VOLTage:AC {|MIN|MAX|DEF},{|MIN|MAX|DEF} Preset and configure the multimeter for AC voltage measurements with the specified range and resolution. This command does not initiate the measurement. For AC measurement, resolution is fixed at 6½ digits. Therefore the resolution parameter only affects the front panel display.
CONFigure:PERiod {|MIN|MAX|DEF},{|MIN|MAX|DEF} Preset and configure a period measurement with the specified range and resolution. This command does not initiate the measurement. For period measurements, the meter uses only one “range” for all inputs between 0.33 seconds and 3.3 µsec. With no input signal applied, period measurements return “0”. CONFigure:CONTinuity Preset and configure for a continuity measurement. This command does not initiate the measurement.
[SENSe:]FUNCtion? Query the measurement function and return a quoted string. [SENSe:]:RANGe {|MINimum|MAXimum} Select a range for measurements, range the selected function. For applies to the signal’s frequency and period input voltage, not its frequency (use FREQuency:VOLTage or PERiod:VOLTage). MIN selects the lowest range for the selected function. MAX selects the highest range. [SENSe:]:RANGe? [MINimum|MAXimum] Query the range for the selected function.
[SENSe:]TCOuple:TYPE {E|J|K|N|R|S|T} Select thermocouple sensor type. [SENSe:]TCOuple:TYPE? Query thermocouple sensor type. [SENSe:]TCOuple:RJUNction:RSELect {REAL|SIMulated } Select a reference junction type, real or simulated. [SENSe:]TCOuple:RJUNction:RSELect? Query the reference junction type, real or simulated. [SENSe:]TCOuple:RJUNction:SIMulated {|MINimum|MAXimum} Set the default temperature of the simulated reference junction.
[SENSe:]TEMPerature:RTD:ALPHa? [MINimum|MAXimum] Query the alpha constant for the user type. [SENSe:]TEMPerature:RTD:BETA {|MINimum|MAXimum} Set the beta constant for the user type. [SENSe:]TEMPerature:RTD:BETA? [MINimum|MAXimum] Query the beta constant for the user type. [SENSe:]TEMPerature:RTD:DELTa {|MINimum|MAXimum} Set the delta constant for the user type. [SENSe:]TEMPerature:RTD:DELTa? [MINimum|MAXimum] Query the delta constant for the user type.
Query the A coefficient. [SENSe:]TEMPerature:SPRTD:BX {|MINimum|MAXimum} Set the B coefficient. [SENSe:]TEMPerature:SPRTD:BX? [MINimum|MAXimum] Query the B coefficient. [SENSe:]TEMPerature:SPRTD:CX {|MINimum|MAXimum} Set the C coefficient. [SENSe:]TEMPerature:SPRTD:CX? [MINimum|MAXimum] Query the C coefficient. [SENSe:]TEMPerature:SPRTD:DX {|MINimum|MAXimum} Set the D coefficient. [SENSe:]TEMPerature:SPRTD:DX? [MINimum|MAXimum] Query the D coefficient.
[SENSe:]FREQuency:APERture? [MINimum|MAXimum] Query the gate time (or aperture time) for frequency function. [SENSe:]PERiod:APERture{0.01|0.1|1|MINimum|MAXimum} Set the gate time (or aperture time) for period function. Specify 10 ms (4.5 digits), 100 ms (default; 5.5 digits), or 1 second (6.5 digits). [SENSe:]PERiod:APERture? [MINimum|MAXimum] Query the gate time (or aperture time) for period function.
100mV, 1V and 10V ranges. With AUTO OFF, the input resistance is fixed at 10MΩ for all ranges. INPut:IMPedance:AUTO? Query the input resistance mode. Returns “1”(ON) or “0”(OFF). ROUTe:TERMinals? Query the multimeter to determine if the front or rear input terminals are selected. Returns "FRON" or "REAR" ROUTe:CLOSe Set channels which need to be closed. ROUTe:CLOSe? Query channels which were closed. ROUTe:OPEN Open all channels.
ROUTe:SCAN:COUNT? Read the number of times of scanning. ROUTe:SCAN:COUNT Set the number of times of scanning. ROUTe:SCAN:STATe? Read the state of scanning. 1 means “finished”. 0 means “not finished”. ROUTe:SCAN:SCAN Run SCAN mode ROUTe:SCAN:STEP Run STEP mode C.6 The Math Operation Command CALCulate:FUNCtion {PERCent|AVERage|NULL|LIMit|MXB|DB|DBM} Select the math function. Only one function can be enabled at a time. The default function is percent.
CALCulate:PERCent:TARGet? [MINimum|MAXimum] Query the target value for percent math function. CALCulate:AVERage:MINimum? Read the minimum value found during the Min/Max operation. The multimeter clears the value when Min/Max is turned on, when the power has been off or a remote interface reset. CALCulate:AVERage:MAXimum? Read the maximum value found during the Min/Max operation. The multimeter clears the value when Min/Max is turned on, when the power has been off or a remote interface reset.
CALCulate:LIMit:UPPer {|MINimum|MAXimum} Set the upper limit for limit testing. You can set the value to any number from 0 to 120% of the highest range, for the present function. CALCulate:LIMit:UPPer? Query the upper limit for the limit testing. CALCulate:MXB:MMFactor {|MINimum|MAXimum} Set the value of M. CALCulate:MXB:MMFactor? [MINimum|MAXimum] Query the value of M. CALCulate:MXB:MBFactor {|MINimum|MAXimum} Set the value of B.
when INITiate is executed. The MEASure? And CONFigure commands automatically select “CALC”. With memory disabled (DATA:FEED RDG_STORE,“”), readings taken using INITiate are not stored. This may be useful with the Min/Max operation since it allows you to determine an average of the readings without storing the individual values. An error will be generated if you attempt to transfer readings to the output buffer using the FETCh? command. DATA:FEED? Query the reading memory state. Return “CALC” or “”.
Set a trigger delay time in seconds. The delay is the time between the trigger signal and each sample that follows. Specify a delay time from 0 to 3600 seconds. TRIGger:DELay? Query the trigger delay time. TRIGger:DELay:AUTO {OFF|ON} Disable or enable a automatic trigger delay. The delay is determined by function, range, integration time, and ac filter setting. Specifying a delay time automatically turns off the automatic trigger delay. TRIGger:DELay:AUTO? Query the automatic trigger delay mode.
where you are able to read them into your bus controller. READ? Change the state of the triggering system from the “idle” state to “wait-for-trigger” state. The meter will start to make measurements when a required triggering condition is met after the READ? command is received. Measurement readings are sent to the output buffer immediately. DISPlay {OFF|ON} Turn off or on the display. DISPlay? Query the display setting. Returns “0” (OFF) or “1” (ON).
SYSTem:VERSion? Query the present SCPI version. L0 Set to the default identification string. L1 Set to the compatible identification string. SYSTEM:IDNSTR "Manufacturer,Product" Change the multimeter’s identification string, such as the maker’s and the product’s names (be sure to dimension a string variable with at most 39 characters). DATA:POINts? Query the number of readings stored in the multimeter’s internal memory. *RST Reset the multimeter to the power-on configuration.
SYSTem:ERRor? Query the multimeter’s error queue. Up to 20 errors can be stored in the queue. Errors are retrieved in first-in-first out (FIFO) order. Each error string may contain up to 80 characters. STATus:QUEStionable:ENABle Enable bits in the Questionable Data enable register. The selected bits are then reported to the Status Byte. STATus:QUEStionable:ENABle? Query the Questionable Data enable register.
*OPC Sets the “operation complete” bit (bit 0) in the Standard Event register after the command is executed. *OPC? Returns “1” to the output buffer after the command is executed. *PSC {0|1} Power-on status clear. Clear the Status Byte and Standard Event register enable masks when power is turned on (*PSC 1). When *PSC 0 is in effect, the Status Byte and Standard Event register enable masks are not cleared when power is turned on.
Many of the required SCPI commands are accepted by the multimeter but are not described in this manual for simplicity or clarity. Most of these non-documented commands duplicate the functionality of a command already described in this chapter.
LIMit:UPPer {|MINimum|MAXimum} LIMit:UPPer? [MINimum|MAXimum] MXB:MMFactor {|MINimum|MAXimum} MXB:MMFactor? [MINimum|MAXimum] MXB:MBFactor {|MINimum|MAXimum} MXB:MBFactor? [MINimum|MAXimum] DB:REFerence {|MINimum|MAXimum} DB:REFerence? [MINimum|MAXimum] DBM:REFerence {|MINimum|MAXimum} DBM:REFerence? [MINimum|MAXimum] CONFigure: CONTinuity DIODe INPut: IMPedance:AUTO {OFF|ON} IMPedance:AUTO? C.11 IEEE-488 Compliance Information IEEE-488.
*SRE? *STB? *TRG Dedicated Hardware Lines Addressed Commands ATN IFC REN SRQ Attention Interface Clear Remote Enable Service Request Interrupt DCL EOI GET GTL LLO SDC SPD SPE Device Clear End or Identify Message Terminator Group Execute Trigger Go to Local Local Lock-Out Selected Device Clear Serial Poll Disable Serial Poll Enable Using Device Clear to Halt Measurements Device clear is an IEEE-488 low-level bus message which can be used to halt measurements in progress.
configuration states are left unchanged when a device clear message is received. Device clear performs the following actions. All measurements in progress are aborted. The multimeter returns to the trigger “idle state.” The multimeter’s input and output buffers are cleared. The multimeter is prepared to accept a new command string. For RS-232 operation, sending the character will perform the equivalent operations of the IEEE-488 device clear message.
Visual C++ In an MFC application, you can override BERKELEY NUCLEONICS CORPORATION IOUtils interfaces in a class as well as provide additional interfaces. The example in this article illustrates how to override an interface in a class while preserving the original interface implementation so that it can be delegated to by the new interface implementation. Browse the Visual C++ samples code; see Visual C++ DEVQUERY Sample Application.
Instance, and Unhandled Exception) is not executed. The Startup Object property can be set in the Application pane of the Project Designer. To change the startup object 1. With a project selected in Solution Explorer, on the Project menu click Properties. 2. Select the Application pane. 3. Select a Startup object from the Startup object drop-down list. To set the startup object for a Windows Application to Sub Main 1. With a project selected in Solution Explorer, on the Project menu click Properties.
Rem Open a session to each and determine if it matches stat = viOpen(dfltRM, desc, VI_NULL, VI_NULL, sesn) If (stat < VI_SUCCESS) Then MsgBox "Open device failed.", vbExclamation, "1201 multimeter device test" stat = viClose(fList) Exit Sub End If Rem send reset command '*RST' -- reset 1201 stat = viWrite(sesn, "*RST", 4, ret) If (stat < VI_SUCCESS) Then MsgBox "System command error.
Using CONFigure with a Math Operation The following example uses CONFigure with the dBm math operation. The CONFigure command gives you a little more programming flexibility than the MEASure? command. This allows you to “incrementally” change the multimeter’s configuration. The example is is shown in Visual Basic. Creating the Application Create a new Visual Basic project as follows: 1. Create a new Standar.EXE project. 2. To set the startup object for a Windows Application to Sub Main 3.
If (stat < VI_SUCCESS) Then 'Rem Error finding resources ... exiting MsgBox "1201 device not found.", vbExclamation, "1201 multimeter device test" viClose (dfltRM) Exit Sub End If Rem Open a session to each and determine if it matches stat = viOpen(dfltRM, desc, VI_NULL, VI_NULL, sesn) If (stat < VI_SUCCESS) Then MsgBox "Open device failed.
MsgBox "System command error.", vbExclamation, "1201 multimeter device test" stat = viClose(fList) Exit Sub End If Rem send command -- Trigger source is IMMediate stat = viWrite(sesn, "TRIG:SOUR IMM", 13, ret) If (stat < VI_SUCCESS) Then MsgBox "System command error.", vbExclamation, "1201 multimeter device test" stat = viClose(fList) Exit Sub End If Rem send command -- Select dBm function stat = viWrite(sesn, "CALC:FUNC DBM", 13, ret) If (stat < VI_SUCCESS) Then MsgBox "System command error.
stat = viClose(dfltRM) For i = 0 To (5 - 1) ' print out the 5 times samples reading Debug.Print "Rdgs = "; Mid(readin, i * 16 + 1, 15) Next i MsgBox "End of Job." End Sub C++ DEVQUERY Sample Application This C sample application is a Win32 console application. It illustrates how to use the BERKELEY NUCLEONICS CORPORATION IOUtils COM. A Win32 console application is a Win32 application which uses text-based input and output, not a graphical interface.
void main(int argc, char* argv[]) { // TODO: Add your control notification handler code here HINSTANCE hUSBTMCLIB; // for USBTMC HANDLE unsigned long m_defaultRM_usbtmc, m_instr_usbtmc; unsigned long m_findList_usbtmc; unsigned long m_nCount; ViStatus status; int char BYTE int m_Timeout = 7000; *pStrout; // Write out data buffer pStrin[64]; // Read in data buffer len; ULONG nWritten; ULONG nRead = 0; char buffer[256]; char instrDescriptor[256]; // Load the NI-VISA library for USBTMC device
timeout, unsigned long *vi); signed long (__stdcall *PviClose_usb) (unsigned long vi); signed long (__stdcall *PviWrite_usb) (unsigned long vi, unsigned char *name, unsigned long len, unsigned long *retval); signed long (__stdcall *PviRead_usb) (unsigned long vi, unsigned char *name, unsigned long len, unsigned long *retval); signed long (__stdcall *PviSetAttribute_usb) (unsigned long vi, unsigned long viAttr, unsigned long attrstat); PviOpenDefaultRM_usb = (signed long (__stdcall*)
if (PviOpenDefaultRM_usb == NULL || PviFindRsrc_usb PviClose_usb == NULL || == NULL || PviOpen_usb == NULL || PviWrite_usb == NULL || PviRead_usb == NULL || PviSetAttribute_usb == NULL ) { FreeLibrary (hUSBTMCLIB); hUSBTMCLIB = NULL; MessageBox(NULL, "NIVISA for USBTMC library not ready.", "1201 multimeter device test", MB_OK); return; } printf("\n ###### Start C++ Example program.
instrDescriptor); if (status < 0L) { // Find the USBTMC device USB[0-9]*::0x164E::0x0FA3::?*INSTR ( Dec ) status = PviFindRsrc_usb "USB[0-9]*::5710::4003::?*INSTR", (m_defaultRM_usbtmc, &m_findList_usbtmc, &m_nCount, instrDescriptor); if (status < 0L) { PviClose_usb(m_defaultRM_usbtmc); hUSBTMCLIB = NULL; m_defaultRM_usbtmc = 0; } else { PviOpen_usb(m_defaultRM_usbtmc, instrDescriptor, 0, 0, &m_instr_usbtmc); status = PviSetAttribute_usb(m_instr_usbtmc, VI_ATTR_TMO_VALUE, m_Timeout); } } else
// Write command "*IDN?" and read the 1201 identification string len = 64; pStrout = new char[len]; ZeroMemory(pStrout, len); strcpy(pStrout, "*idn?"); status = PviWrite_usb(m_instr_usbtmc, (unsigned char *)pStrout, 6, &nWritten); Sleep(30); if (status != VI_SUCCESS) { MessageBox(NULL, "Write to device error.
// Set sample count to 1 strcpy(pStrout, "SAMP:COUN 1"); status = PviWrite_usb(m_instr_usbtmc, (unsigned char *)pStrout, 12, &nWritten); Sleep(30); // Set configure Voltage AC, range 0.1A strcpy(pStrout, "CONF:VOLT:AC 0.1,0.
printf(" output : READ?\n"); status = PviRead_usb(m_instr_usbtmc, pStrin, 64, &nRead); if (nRead > 0) { for (len=0; len < (long) nRead; len++) { buffer[len] = pStrin[len]; } } buffer[nRead] = '\0'; printf(" input : %s\n\n", buffer); // Set device to local mode strcpy(pStrout, "system:local"); status = PviWrite_usb(m_instr_usbtmc, (unsigned char *)pStrout, 13, &nWritten); free(pStrout); // Close device if (!hUSBTMCLIB) return; m_nCount = 0; m_defaultRM_usbtmc = 0; FreeLibrary (hUSBTMCLIB); hUSBTMCLIB = NU
