D.C. Milli-Ohm Meter GOM-804 & GOM-805 USER MANUAL GW INSTEK PART NO.
This manual contains proprietary information, which is protected by copyright. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of the Good Will company. The information in this manual was correct at the time of printing. However, Good Will continues to improve products and reserves the right to change specifications, equipment, and maintenance procedures at any time without notice. Good Will Instrument Co., Ltd.
Table of Contents Table of Contents SAFETY INSTRUCTIONS .................................................... 5 Safety Symbols .................................................... 5 Safety Guidelines ................................................ 6 GETTING STARTED ............................................................ 9 GOM-804/805 Characteristics........................... 10 Key Features ...................................................... 13 Model Lineup .......................................
GOM-804 & GOM-805 User Manual BINNing Commands ....................................... 108 Calculate Commands ...................................... 113 Memory Commands ........................................ 120 Sense Commands ............................................ 122 Source Commands .......................................... 126 Status Commands ........................................... 127 System Commands.......................................... 128 Temperature Commands .......................
SAFETY INSTRUCTIONS SAFETY INSTRUCTIONS This chapter contains important safety instructions that you must follow when operating the GOM-804/805 or when keeping it in storage. Read the following before any operation to insure your safety and to keep the GOM-804/805 in the best possible condition. Safety Symbols These safety symbols may appear in this manual or on the GOM-804/805. Warning: Identifies conditions or practices that could WARNING result in injury or loss of life.
GOM-804 & GOM-805 User Manual Safety Guidelines General Guideline CAUTION Do not place any heavy objects on the instrument. Avoid severe impact or rough handling that leads to damaging the instrument. Do not discharge static electricity to the instrument. Use only mating connectors, not bare wires, for the terminals. Do not disassemble the instrument unless you are qualified as service personnel. (Note) EN 61010-1:2010 specifies the measurement categories and their requirements as follows.
SAFETY INSTRUCTIONS (Note) EN 61010-1:2010 specifies the pollution degrees and their requirements as follows. The GOM-804/805 falls under degree 2. Pollution refers to “addition of foreign matter, solid, liquid, or gaseous (ionized gases), that may produce a reduction of dielectric strength or surface resistivity”. Storage Environment Disposal Pollution degree 1: No pollution or only dry, non-conductive pollution occurs. The pollution has no influence.
GOM-804 & GOM-805 User Manual Power cord for the United Kingdom When using the instrument in the United Kingdom, make sure the power cord meets the following safety instructions.
GETTING STARTED GETTING STARTED This chapter describes the GOM-804/805 in a nutshell, including its main features as well as its front and rear panels. After going through the panel overview, follow the Power-up sequence before attempting to use the instrument. Please note the information in this manual was correct at the time of printing. However as GW Instek continues to improve its products, changes can occur at any time without notice.
GOM-804 & GOM-805 User Manual GOM-804/805 Characteristics GOM-804 and GOM-805 are modern high precision programmable DC Milli-ohm meters suitable for low resistance measurements of switches, relays, connectors, PCB tracks and a variety of other devices. The meters feature a color TFT-LCD screen with easy-to-read measurement results. With the easy-to-use features, superior performance and automatic test interfaces, these meters are dependable instruments for resistance measurements.
GETTING STARTED Advanced Temperature Measurements The GOM-804/805 has a number of advanced temperature functions that can be used with the optional temperature probe, PT-100. The temperature compensation function can extrapolate what the resistance of a DUT will be at a desired temperature, if the temperature coefficient of the DUT and the resistance of the DUT at ambient temperature are known.
GOM-804 & GOM-805 User Manual Applications Production testing for contact resistance of switches, relays, connectors, cables and printed circuit boards and other low resistance devices. Component testing of resistors, motors, fuses and heating elements. Incoming inspection and quality assurance testing. Conductivity evaluation for product design.
GETTING STARTED Key Features 50,000 counts Measurement Range: 50mΩ~5MΩ Accuracy of up to 0.
GOM-804 & GOM-805 User Manual Model Lineup Feature / Model GOM-804 GOM-804G* GOM-805 Ohm Measurement ✔ ✔ ✔ Compare Function ✔ ✔ ✔ Diode Measurement ✔ ✔ ✔ Temp. Compensation ✔ ✔ ✔ Temp.
GETTING STARTED Front Panel Overview LCD display Arrow keys, Enter keys Function key G O M -8 0 5 ESC key DC Milliohm Meter Ohm Compare Binning TC TCONV TEMP Speed REL RT Scan Dry Trigger GND Enter ESC GUARD Display SOURCE G O M -8 0 5 Diode Local SENSE Range Drive SENSE SOURCE GND terminal GUARD terminal POWER Rx DC Milliohm Meter Ohm Compare Binning TC TCONV TEMP Speed REL RT Scan Dry Display Trigger Power Switch SOURCE Enter Sense-, SourceDiode Local G
GOM-804 & GOM-805 User Manual GND Terminal GND GUARD Terminal GUARD Function Keys Ohm Compare The GUARD terminal has the same potential as earth, but cannot be substituted for it. Connect the GUARD terminal to the cable shield layer of the test leads to help reduce noise. The Ohm key activates the resistance measurement function. The Compare key activates the comparator function.
GETTING STARTED Speed REL RT Scan The Speed key toggles between 10 samples per second and 60 samples per second (Slow rate and Fast rate). The REL key is used to perform a zero adjustment to the test leads or a DUT. The RT key is used to display the real-time (not averaged) measured resistance value. The Scan key is used to turn on the Scan function.
GOM-804 & GOM-805 User Manual Drive + Enter Long pressing the Range key will activate the auto ranging mode. Range Range Enter ESC Arrow Keys, Enter Key Enter 18 The Drive key in conjunction with the up/down arrow keys is used to select the measuring signal: DC+, DC-, Pulse, PWM, Zero. In particular, the Zero setting can be used as a +/-10mV DC voltmeter to measure the EMF of passive components. See page 33 for details. GOM-805 only. The drive signal is fixed to DC+ on the GOM-804.
GETTING STARTED TFT-LCD Overview Function mode Range Trigger mode Rate Average value Dry circuit Remote error Remote mode Drive signal Memory number REL value Function control indicators Main measurement display Function mode settings Secondary menus Function Control The function control indicators show all the currently Indicators active settings for the selected function mode: Func Currently selected function mode Range The measurement range.
GOM-804 & GOM-805 User Manual RMT Indicates that the unit is in remote control mode Mem No. Indicates which memory setting has been recalled Main Measurement Display Shows all measurement results for the selected function mode. Function Mode Settings Shows any function mode-specific settings. Secondary Menus The secondary menus show global menus (Meas. Setup), System, Memory) as well as function-specific secondary menus. 20 Meas. Setup Goes to the global Measurement Setup menu.
GETTING STARTED Rear Panel Overview GPIB port RS232 port Handler/Scan/Ext I/O GPIB RS232 AC 100 240V , 50 25VA MAX HANDLER / SCAN / EXT I/O 60Hz WARNING TC SENSOR USB B port TO AVOID SHOCK, REMOVE INPUTS BEFORE OPENING. SER.NO. LABEL AC power input AC Input Temperature sensor port AC 100 240V , 50 25VA MAX 60Hz Accepts the power cord. AC 100 240Vac; 50 - 60Hz. For the power up sequence, see page 24. RS-232 Port RS232 Accepts an RS-232C cable for remote control; DB-9 male connector.
GOM-804 & GOM-805 User Manual Temperature Sensor Port 22 TC SENSOR The temperature sensor input is for the optional PT-100 temperature probe.
GETTING STARTED Set Up Tilt Stand Tilt To tilt, pull the legs forward, as shown below. Stand Upright To stand the unit upright, push the legs back under the casing as shown below.
GOM-804 & GOM-805 User Manual Power Up 1. Connection Ensure that the input AC power voltage is within the range of 100~240 V. Connect the power cord to the AC Voltage input. CAUTION 1. Power up Ensure the ground connector of the power cord is connected to a safety ground. This will affect the measurement accuracy. Press the main power switch on the front panel. The display will light up and show the last setting used before the last shut down.
GETTING STARTED 4 Wire Kelvin Connection Background Connection Diagram The GOM-804/805 uses 4 wire Kelvin connections for accurate measurements. SOURCE SENSE SENSE SOURCE GUARD shielding + - Description Source + The Source + terminal carries the measuring current source. It is connected to the + side of the DUT. Source - The Source - terminal accepts the signal return current and connects to the – side of the DUT. Sense + Monitors the positive (+) potential.
GOM-804 & GOM-805 User Manual Zeroing (Relative Function) Background The Relative function is used to perform a zero adjustment on the test leads. After the Relative value is pre-set, each measurement that is displayed is equal to the actual value minus the relative preset value. Note 1. Short the cables The Relative function cannot be used with the Scan or Diode functions. Short the test cables together as shown in the diagram below: SOURCE SENSE SENSE Source+ /Sense+ 2.
MEASUREMENT MEASUREMENT Ohm Compare Binning TC TCONV TEMP Speed REL RT Scan Dry Trigger Display Resistance Local Diode Enter ESC Drive Range Resistance Measurement ....................................... 29 Select the Resistance Range ................................... 30 Drive Signal Measuring Signal (Drive) Overview ........................ 31 Select Measuring Signal (Drive) ............................. 33 Rate Select Measurement Rate .......................................
GOM-804 & GOM-805 User Manual Temperature Compensation Temperature Compensation ................................... 52 Temperature Conversion Temperature Conversion ........................................ 56 Measurement Settings Average Function ................................................... 60 Measure Delay ....................................................... 61 Trigger Delay .......................................................... 63 Trigger Edge ...........................................
MEASUREMENT Resistance Measurement 1. Select the Resistance function. 2. Resistance mode display appears. Press mode. Ohm to access the Resistance measurement Ohm measurement function indicator Resistance range and mode Ohm measurement 3. Connect the test lead and measure 4-wire resistance: Use the SOURCE + and the SOURCE - terminal for measurement, and the SENSE +, and SENSE - terminal for sensing.
Ohm rangeGOM-804 & GOM-805 User Manual Select the Resistance Range Background The resistance range can be used with normal resistance measurement as well as the temperature compensation function. Manual Press the RangeOhm keymeasurement and use the up and down arrow keys to manually select the resistance range. Set range Range select indicator Auto Range Long press the ranging.
MEASUREMENT Measuring Signal (Drive) Overview Background Note DC+ Resistance measurement has 5 different measuring signals that can be applied to obtain a resistance measurement: DC+, DC-, Pulse, PWM, Zero. These 5 signals are described in below. The Drive function is only applicable to the GOM-805. The Drive signal for the GOM-804 is fixed to DC+. V Open circuit voltage t ~ +6.5V 0V V DC- t Open circuit voltage 0V ~ -6.5V V Pulse ~+6.5V 0V ~-6.5V 50ms t 50ms V ON duty PWM ~+6.
GOM-804 & GOM-805 User Manual A note about Thermoelectric EMF When making low resistance measurements, thermoelectric electromotive force (Vemf) can affect measurement accuracy. Vemf is created at the junction of two dissimilar metals, such as the contact point of a test lead and the pin of a DUT. Vemf adds a small but measurable voltage to the measurement. There are primarily two different methods to compensate for Vemf in low resistance measurements: Offset Compensation and Vemf Cancelling.
MEASUREMENT Select Measuring Signal (Drive) Background Note Resistance measurement has 5 different measuring signals that can be applied to obtain a resistance measurement: DC+, DC-, Pulse, PWM, Zero. The Dive function is only applicable to the GOM-805. The drive signal for the GOM-804 is fixed to DC+. The Drive function cannot be used with the Scan or Diode functions. In addition, the “Zero” drive setting is only available with the Ohm measurement function. 1.
GOM-804 & GOM-805 User Manual Select Measurement Rate Background The resistance measurement speed has 2 ranges: slow and fast. Slow speed is the most accurate with 10 measurements/second. Fast speed has 60 measurements/second. Both have the same measurement resolution. The rate selection function is not applicable in Diode measurement mode. When the PWM drive signal is used or when the Scan function is activated, the only available rate setting is fast. 1. Select Rate Press the rates.
MEASUREMENT Display Mode Background The Display key can be used to toggle between the normal and the simplified display mode. The simplified display mode clears all text, menus and function indicators from the screen except for the measurement and measurement mode indicators. 1. Toggle Display Press the Display key to toggle the display between mode normal and simplified. The display will change accordingly.
GOM-804 & GOM-805 User Manual View Real-Time Measurement Background When measurements are smoothed using the averaging function, the RT key can be used to view the real-time results in addition to the averaged results. See page 60 for Average configuration. 1. Toggle Real-Time display Press the or off. RT The real-time measurement will appear in the bottom left-hand corner.
MEASUREMENT Dry-Circuit Measurement Background Note The Dry Circuit measurement function is used where the maximum open-circuit voltage must be kept to a minimum for applications such as measuring the contact resistance of switches, relays and connectors. The GOM-805 provides a maximum of up to 20mV in this mode. Dry circuit testing is for switch and connector contact resistance.
GOM-804 & GOM-805 User Manual 1. Toggle Dry mode on or off Press the Dry key to toggle the dry circuit measurement mode on or off. The DRY function indicator will appear in the middle of the display when active. Dry Circuit measurement mode indicator Using the Trigger Function Background The GOM-804/805 can use internal or manual triggering for the Resistance, Temperature, Temperature Compensation, Temperature Conversion, Binning, Handler and Scan modes.
MEASUREMENT 3. Internal Triggering Long press Trigger to return the triggering mode back to internal mode. The Int indicator will be shown on the display.
GOM-804 & GOM-805 User Manual Diode Function Background The Diode function can be used to measure the forward bias voltage of a diode under test. 1. Select the Diode function. Press 2. Diode mode appears. Diode function indicator Diode to access the Diode measurement mode. Forward bias voltage 3. Connect the test lead and measure 40 Connect the Sense+, Source+ to the anode. Connect the Sense-, Source- to the cathode.
MEASUREMENT Compare Function Background The compare function compares a measured value to a “Reference” value that has an upper (HI) and lower (LO) limit. If the measured value is within the upper and lower limit, then the measured value is judged as IN. There are three compare modes that can be used to make a judgment: ABS, △% and % modes.
GOM-804 & GOM-805 User Manual The △% compare function displays the deviation of the measured value from the reference value as a percentage. { [(Measured Value-Reference)/Reference]%}. Compare function indicator Measured value Deviation of the measured value from the reference value as a percentage Pass/Fail judgment Reference, limits, compare mode and beep mode The upper (HI) and low (LO) limits are set as a percentage from the reference value.
MEASUREMENT Compare function indicator Measured value Measured value as a percentage of the reference value Pass/Fail judgment Reference, limits, compare mode and beep mode A measured value that falls within the upper and lower limits is considered IN (pass), a value that falls below the lower limits is considered LO, and a value that falls over the upper limit is a HI.
GOM-804 & GOM-805 User Manual 3. Reference value setting Use the arrow keys to navigate to the Reference setting and press Enter. Use the left and right arrow keys to select a digit. Use the up and down arrow keys to edit the value of the selected digit and the unit. Press Enter to confirm the setting. Move and edit Enter Select and confirm 000.0001~ 999.
MEASUREMENT 5. Beep setting Use the arrow keys to navigate to the Beep setting. Press Enter to toggle the beep setting. Move Beep setting Beep Setting: Note Enter Toggle Off, Pass, Fail The Beep setting can also be set from the System>Utility>Beep>Compare menu.
GOM-804 & GOM-805 User Manual Binning Function Background The Binning function is used to grade DUTs into eight different bins according to 8 sets of upper and lower limits. Two compare modes can be used in this function, ABS and △% modes. Binning function indicator Grading results Upper and lower limits for the 8 bins Reference, compare mode, beep mode and display mode Press the 1. Select the Binning function 2. Select the compare mode Binning key to access this function.
MEASUREMENT Note 3. Reference value setting For further details on the ABS or △% compare modes, see the description in the Compare section, page 41. Although the 8 bins have their own upper and lower limits, they still share a common reference value. Use the arrow keys to go to the Reference setting and press Enter. Use the left and right arrow keys to select a digit. Use the up and down arrow keys to edit the value of the selected digit and the unit. Press Enter to confirm the setting.
GOM-804 & GOM-805 User Manual Note 5. Beep setting The upper limit must be higher than the lower limit. Not setting the upper limit higher than the lower limit is not allowed. Likewise the lower limit cannot be set higher than the upper limit. Use the arrow keys to navigate to the Beep setting. Press Enter to toggle the beep setting. Move Enter Beep setting Beep Setting: Note 6. To start binning Toggle Off, Pass, Fail The Beep setting can also be set from the System>Utility>Beep>Binning menu.
MEASUREMENT The Count display mode tabulates the results on the right-hand side of the display and shows the bin settings on the left. Tabulated result of each bin Overall results Upper and lower limits of Bin 1~8 Clear results To toggle the display mode, go to the Disp setting and press Enter. Move Disp setting 8. How to clear the result count Enter Toggle When in the Count display mode, press the ESC key. Go to the Clear setting and press Enter.
GOM-804 & GOM-805 User Manual Temperature Measurement Background The temperature measurement function uses the optional PT-100 temperature probe. The measured temperature is displayed on the display. For more information on the optional PT-100 sensor, see the appendix on page 149. There is only one range for the temperature function. However the resistance measurement range can still be changed when in the temperature function.
MEASUREMENT 3. Ambient Temperature The Ambient temperature setting should be turned off when using the temperature function. From the bottom menu go to Meas. Setup > Ambient Temperature and turn the Ambient Temperature setting off. See page 66 for setting details. 4. Temperature mode connection The temperature sensor uses the rear panel TC Sensor port for input. GPIB RS232 AC 100 240V , 50 25VA MAX HANDLER / SCAN / EXT I/O 60Hz WARNING TO AVOID SHOCK, REMOVE INPUTS BEFORE OPENING.
GOM-804 & GOM-805 User Manual Temperature Compensation Background If the resistance of a DUT at a particular temperature is needed, the compensation function can be used. This function can simulate the resistance of a DUT at a desired temperature. If the ambient temperature and the temperature coefficient of the DUT are known, it is possible to determine the resistance of a DUT at any temperature.
MEASUREMENT 1. Select the Temperature Compensation mode Press TC function. to access the Temperature Compensation The temperature-compensated resistance measurement will appear on the display. Temperature compensation function indicator Extrapolated resistance measurement at the desired (“correct”) temperature Ambient temperature source Ambient temperature Correct Temperature, Temperature Coefficient settings 2.
GOM-804 & GOM-805 User Manual 3. Temperature compensation Use arrow keys to go to Correct Temperature or to Temperature Coefficient and press Enter to select the setting. To edit the setting values use the left and right arrow keys to select a digit and use the up and down arrow keys to edit the digit. Press Enter to confirm the setting. Move and edit Enter Select and confirm Correct temperature, temperature coefficient settings Desired Temperature range -50.0 ~ +399.
MEASUREMENT 3. Temperature compensation connection Sensor Connection: GPIB RS232 AC 100 240V , 50 25VA MAX HANDLER / SCAN / EXT I/O PT-100 temperature sensor 60Hz WARNING TC SENSOR TO AVOID SHOCK, REMOVE INPUTS BEFORE OPENING. SER.NO. LABEL Note: If the sensor is not connected, then the Ambient temperature needs to be manually set.
GOM-804 & GOM-805 User Manual Temperature Conversion Background The Temperature Conversion function allows you to determine the temperature change of a DUT at any given resistance, if the initial temperature, the inferred zero resistance temperature for the DUT and the initial resistance of the DUT are known. The displayed result can also be the extrapolated to calculate the final temperature (T) or the extrapolated temperature difference (△T)*.
MEASUREMENT Common inferred Metallic conductors show increased resistivity when zero resistance temperature is increased, and likewise show reduced temperatures resistivity when temperature is reduced. Inferred zero resistance temperature is simply the inferred temperature at which the material will have no resistance. This value is derived from the temperature coefficient of the material. Note: the inferred zero resistance temperature is an ideal value, and not a real-world value. 1.
GOM-804 & GOM-805 User Manual 2. Initial Resistance, Initial Temperature and Constant settings Use the arrows keys to go to Initial Resistance, Initial Temperature or Constant (inferred initial resistance temperature) and press Enter. Use the left and right arrow keys to select a digit and use the up and down arrow keys to edit the digit. Press Enter to confirm the edit. Move and edit Select and confirm Enter 3.
MEASUREMENT DUT connection 4 wire Kelvin: SOURCE SENSE SENSE SOURCE GUARD shielding 59
GOM-804 & GOM-805 User Manual Measurement Settings Background The following measurement settings are used to configure the various measurement modes. Average Function Background The average function smoothes measurements using a moving average. The average function sets the number of samples used for the moving average; a higher number results in smoother measurement results. The average function is turned off by default. 1.
MEASUREMENT Measure Delay Background The Measure Delay setting inserts a delay time between each measurement. Measure delay is turned off by default. Measurement start with Measure delay time Test signal Measure delay time Default Measurement start time The measure delay setting is useful for measuring components that need some time to charge if the default measurement start time is not adequate.
GOM-804 & GOM-805 User Manual Note 62 Pressing ESC before pressing ENTER will exit the Measure Delay settings.
MEASUREMENT Trigger Delay Background The Trigger Delay setting adds a delay to when an external trigger signal is recognized. Normally the external trigger is recognized when there is no contact bounce in the signal for a fixed length of time, this time is known as the bounce monitoring window. This ensures that the external trigger signal is stable before it is recognized. The Trigger Delay time starts right after the bounce monitoring window ends.
GOM-804 & GOM-805 User Manual 2. Trigger Delay setting appears Use the arrow keys to turn Trigger Delay on and set the delay time. Press Enter to confirm the settings. Trigger Delay setting Trigger Delay Note OFF, ON: 0 ~ 1000ms Pressing ESC before pressing ENTER will exit the Trigger Delay settings. Trigger Edge Background The Trigger Edge setting sets the external trigger edge as rising or falling. By default the trigger edge is set to rising. 1.
MEASUREMENT Temperature Unit Background Temperature units can be set to Fahrenheit or Celsius for all temperature measurements. From one of the main screens, press 1. Select ESC Temperature Unit the key so that the menu setting system at the bottom of the display Meas. Setup menu icon has focus. Go to Meas. Setup and press Enter. Go to Temperature Unit and press Enter. 2.Temperature Unit setting appears Move Enter Select menu or setting Use the arrow keys to set the Temperature Unit.
GOM-804 & GOM-805 User Manual Ambient Temperature Background The Ambient Temperature setting is used to set the ambient (room temperature) for the Temperature Compensation or Temperature Conversion function in the absence of the PT-100 temperature sensor. See page 52 and 56 respectively for details. 1. Select Ambient From one of the main screens, press Temperature the ESC key so that the menu setting system at the bottom of the display Meas. Setup menu icon has focus. Go to Meas.
MEASUREMENT Line Frequency Background The Line Frequency setting selects the appropriate line filter to reduce the influence of the AC line frequency on the milliohm measurements. This setting is set to AUTO by default. 1. Select Line Frequency setting From one of the main screens, press the ESC key so that the menu system at the bottom of the display has focus. Meas. Setup menu icon Go to Meas. Setup and press Enter. Go to Line Frequency and press Enter. Move Enter Select menu or setting 2.
GOM-804 & GOM-805 User Manual PWM Setting Background The PWM setting will set the duty of the PWM Drive setting. The duty is set with ON and OFF times for the waveform. OFF time ON time See page 31 for Drive setting details. 1. Select PWM setting From one of the main screens, press the ESC key so that the menu system at the bottom of the display has focus. Meas. Setup menu icon Go to Meas. Setup and press Enter. Move Go to PWM and press Enter. Enter 2.
MEASUREMENT System Settings Background The System settings are used to view the system information, set the power on state, the remote interface, screen brightness, external interface and beep settings as well as access the calibration menu. System Information Background The System Information will show the manufacturer, model, software version and serial number of the unit. The system information is the equivalent of the return string from the *idn? query (page 144). 1.
GOM-804 & GOM-805 User Manual Power On Status Setup Background The Power On Status Setup allows you to either load the previous settings or the default settings on startup. 1. Select Power On Status setting From one of the main screens, press the ESC key so that the menu system at the bottom of the display has focus. System menu icon Go to System and press Enter. Go to Power On Status Setup and press Enter. 2.
MEASUREMENT Interface Background Note The remote interface can be set to RS232, GPIB or USB. The GPIB interface is only available on the GOM-804G and the GOM-805. From one of the main screens, press 1. Select ESC Interface setting the key so that the menu System menu icon system at the bottom of the display has focus. Go to System and press Enter. Move Go to Utility and press Enter. Go to Interface and press Enter. 2.
GOM-804 & GOM-805 User Manual Brightness Background The Brightness setting sets the backlight brightness of the TFT-LCD panel. 1. Select Brightness setting From one of the main screens, press the ESC key so that the menu system at the bottom of the display has focus. System menu icon Go to System and press Enter. Move Go to Utility and press Enter. Go to Brightness and press Enter. 2. Brightness setting appears Enter Select menu or setting Use the arrow keys to set the brightness level.
MEASUREMENT User Define Pins Background The External I/O User Define Pin settings set the logic and the active level for the Define 1 and Define 2 pins on the Handler/Scan/EXT I/O port on the rear panel. The External I/O pins are used with the compare or bin functions. The logic settings can be based on the pass, fail, high, low or bin grade results of the selected function. 1.
GOM-804 & GOM-805 User Manual *The OFF operator sets the Logic as true when Operand1 is true. ** Bin O is defined as outside bin 1~ 8. The Bin logic settings are not available for the GOM-804. Note Pressing ESC before pressing ENTER will exit from the selected External I/O setting. Handler Mode Background The Handler Mode setting determines the behavior of the result signals from the handler interface. There are two settings, Clear and Hold.
MEASUREMENT Hold example Hold: The results of the previous tests are held until the current test has completed. EOT falling edge EOT rising edge Trigger Ready EOT Pass Fail High Low Previous results Previous results held New results 1. Select External From one of the main screens, press I/O setting the ESC key so that the menu System menu icon system at the bottom of the display has focus. Go to System and press Enter. Move Go to Utility and press Enter. Go to External I/O and press Enter. 2.
GOM-804 & GOM-805 User Manual Beep Background The Beep setting will configure the beeper sound for the key presses, the Compare function and the Binning function. For the Compare and Binning function the beep can be configured to beep on a pass or fail judgment. 1. Select Beep setting From one of the main screens, press the ESC key so that the menu system at the bottom of the display has focus. System menu icon Go to System and press Enter. Move Go to Utility and press Enter.
HANDLER/SCAN INTERFACE HANDLER/SCAN INTERFACE Handler Handler Overview ................................................... 78 Pin Definitions for the Handler Interface ............... 80 Handler Interface for Binning and Compare Functions ............................................................... 80 Scan Scan Overview ........................................................ 82 Pin Definitions for the SCAN Interface ................... 83 Scan Interface ..............................................
GOM-804 & GOM-805 User Manual Handler Overview Background The Handler interface is used to help grade components based on the Compare or Binning function test results. The appropriate pins on the handler interface are active when the Compare or Binning function is used. There are 17 TTL outputs and 1 TTL inputs. The Handler interface is only applicable with the Binning function or Compare measurement modes.
HANDLER/SCAN INTERFACE FAIL High when the compare result is either HI or LO (fail). PASS High when the compare result is IN (pass). For the full pin definition, please refer to the table listed below. Note The output current from all the pins and the VINT(+5V) pin cannot exceed 60mA.
GOM-804 & GOM-805 User Manual Pin Definitions for the Handler Interface As this interface is used for the handler and scan functions, the interface pinout depends on the function mode. The following pinout is only applicable when using the Binning or Compare function.
HANDLER/SCAN INTERFACE 13 15 16 19 20 21 22 23 24 25 Bin5 High when the binning sorting result is within the bin5 setting range. Userdefine2 High or low when the user define2 logic conditions are met. Userdefine1 High or low when the user define1 logic conditions are met. VEXT External DC Voltage, acceptable range is +5V. Ready High when the measurement has finished. The instrument is ready for the next trigger. Bin6 High when the binning sorting result is within the bin6 setting range.
GOM-804 & GOM-805 User Manual Scan Overview Background The Scan function is used to automatically bin groups of up to 100 components. The associated pins in the handler interface are active when the Scan function is activated. There are a total of 6 outputs, 3 inputs as well as a GND and power (+5V) pin. HANDLER / SCAN / EXT I/O Interface and pin assignment 25Pin D-SHELL (Female) Pin Assignment Relay Controls the relay output. Pass Pass signal. Indicates the compare result is IN(pass).
HANDLER/SCAN INTERFACE Pin Definitions for the SCAN Interface As this interface is used for the handler and scan functions, the interface pinout depends on the function mode. The following pinout is only applicable when using the Scan function. HANDLER / SCAN / EXT I/O 13 1 25 14 Scan Interface Pin Name Description In/Out 1,9-13,15-17,21,23 Reserved -25 2 Trigger Start for Scan measurement. In 3,14,18 GND Ground. 4 High High signal. Indicates a HI compare Out result.
GOM-804 & GOM-805 User Manual Scan Setup Background The Scan function sequentially scans up to 100 channels and grades the resistance of the DUT on each channel to a reference value. An automated handler or test fixture is required to interface the DUTs to the measurement terminals and the scan interface that controls the timing of each scan.
HANDLER/SCAN INTERFACE the measured value from the reference value as a percentage. { [(Measured Value-Reference)/Reference]%}. A measured value that falls within the upper and lower limits is considered IN (pass), a value that falls below the lower limits is considered LO, and a value that falls over the upper limit is a HI.
GOM-804 & GOM-805 User Manual 3. Channel setting The Channel setting sets the number of DUT channels that are used. Use the arrow keys to navigate to the Channel setting and press Enter. Use the left and right arrow keys to select a digit. Use the up and down arrow keys to edit the value of the selected digit. Press Enter to confirm the setting. Move and edit Channel setting Channel Range: 4.
HANDLER/SCAN INTERFACE Scan function indicator Measured value Pass/Fail judgment Change display view Reference, limits, scan mode, current channel, measurement delay 6. View Results After the last SCAN test has finished, press the ESC key so that the menu system at the bottom of the display has focus. Go to View and press Enter to view the results of each channel. View display results Move Enter Select Use the Previous and Next soft-keys to view each page.
GOM-804 & GOM-805 User Manual Scan Output The timing diagrams for the scan output under different conditions are shown below. Background Ready message displayed… Relay Pass Low High Clock STRB 100 99 98 97 After the manual trigger key is pressed…. 2 1 Scan channel 1. Delay time has elapsed. Relay Pass Low High Clock STRB 100 99 2 88 100 99 2 1 Relay Pass Low High Clock STRB 100 99 98 98 97 2 1 n 1 20us 168us 99 n+1 Scan output signal timing.
HANDLER/SCAN INTERFACE GOM-802 Compatibility for Scan and Handler Interfaces As the handler interface on GOM-802 is a 9-pin D-sub and the GOM-805 is a 25-pin D-sub, the GOM-805 handler interface cannot be used with existing GOM-802 ATE equipment or environments without modification.
GOM-804 & GOM-805 User Manual Configure Interface Overview The RS-232 and USB interfaces are standard for all models, however the GPIB interface is only applicable for the GOM-804G and GOM-805. The remote control interfaces allow the GOM-804/805 to be programmed for automatic testing. For more information on remote control programming, please see the Command Overview chapter on page 102.
HANDLER/SCAN INTERFACE Install USB Driver Background The USB driver needs to be installed when using the USB port for remote control. The USB interface creates a virtual COM port when connected to a PC. 1. Select the USB Configure the interface to USB in driver. System>Utility>Interface menu. Page 71 Connect the Type A-B USB cable to the rear panel USB B port on the GOM-804/805. Connect the other end to the Type A port on the PC. Go to the Windows Device Manager.
GOM-804 & GOM-805 User Manual Configure RS-232 Interface Background The GOM-804/805 can also use an RS-232C connection for remote control. When connecting to a PC ensure the correct baud rate, parity, data bits, stop bit and data control settings are used. Settings Baud rate 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 Parity None Data bits 8 Stop bit 1 Data flow control None Configure the interface to RS232 and 1.
HANDLER/SCAN INTERFACE Configure GPIB Interface Background Note 1. Select the GPIB address The GPIB interface is SCPI-1994, IEEE488.1 and IEEE488.2 compliant. The GPIB interface is only available on the GOM-804G and GOM-805. Configure the interface to GPIB and set Page 71 the GPIB address in System>Utility>Interface menu. Connect one end of the GPIB cable to the computer and the other end to the GPIB port on the GOM-805.
GOM-804 & GOM-805 User Manual Using Realterm to Establish a Remote Connection Background Realterm is a terminal program that can be used to communicate with a device attached to the serial port of a PC or via an emulated serial port via USB. The following instructions apply to version 2.0.0.70. Even though Realterm is used as an example to establish a remote connection, any terminal program can be used that has similar functionality. Note Realterm can be downloaded on Sourceforge.net free of charge.
HANDLER/SCAN INTERFACE 2. Run Realterm Start Realterm on the PC as an administrator. Click: Start menu>All Programs>RealTerm>realterm Tip: to run as an administrator, you can right click the Realterm icon in the Windows Start menu and select the Run as Administrator option. After Realterm has started, click on the Port tab. Enter the Baud, Parity, Data bits, Stop bits and Port number configuration for the connection.
GOM-804 & GOM-805 User Manual 3. Test remote command Click on the Send tab. In the EOL configuration, check on the +CR and +LF check boxes. Enter the query: *idn? Click on Send ASCII. The terminal display will return the following: GWINSTEK,GOM805,GXXXXXXXX,V1.00 (manufacturer, model, serial number, version) 4. Errors or Problems If Realterm fails to connect to the GOM-804/805, please check all the cables and settings and try again.
HANDLER/SCAN INTERFACE Start>All Programs>National Instruments>Measurement & Automation Step a. From the Configuration panel access; My System>Devices and Interfaces>GPIB0 Step b. Press the Scan for Instruments button. Step c. In the Connected Instruments panel the GOM-804/805 should be detected as Instrument 0 with the address the same as that configured on the unit. Step d. Double click the Instrument 0 icon. b a c d Step e. Click on the Attributes tab at the bottom. Step f.
GOM-804 & GOM-805 User Manual Step g. In the NI-488.2 Communicator window, ensure *IND? is written in the Send String: text box. Click on the Query button to send the *IDN? query to the instrument. Step h. The String Received text box will display the query return: GWINSTEK,GOM805,GXXXXXXXX,V1.00 (manufacturer, model, serial number, version) f g h e The function check is complete.
SAVE/RECALL SAVE/RECALL The settings for all the major functions can be saved and recalled from 20 memory slots. Settings can saved/recalled for the following functions: Ohm, Compare, Binning, TC, TCONV, TEMP, Scan, Diode. Save/Recall Settings Background The save function saves the current function as well the settings related to that function. There are 20 memory slots that can be used to save and recall settings on the GOM-804/805. 1.
GOM-804 & GOM-805 User Manual The Recall/Save Setup menu will appear. 2. Save/ Recall/Clear Memory The No. setting should be already highlighted when entering the Recall/Save Setup menu. If not, use the Left/Right arrow keys to highlight the No. setting. No. setting Recall, Save, Clear settings Move and edit Enter Select and confirm Use the up and down arrow keys to select a memory space.
SAVE/RECALL Press Enter again when asked to confirm the selected operation. After saving the settings, press ESC to return to the current function mode. After recalling settings, the unit will automatically go to the recalled setting function. Note View memory slot availability Pressing ESC before pressing Enter will exit the Save/Recall/Clear operation. Press the Enter key when the No. setting is highlighted to see which memory slots are empty.
GOM-804 & GOM-805 User Manual COMMAND OVERVIEW The Command overview chapter lists all the programming commands in alphabetical order. The command syntax section shows you the basic syntax rules you have to apply when using commands. Command Syntax Compatible Standard IEEE488.2 Partial compatibility SCPI, 1994 Partial compatibility Command Structure SCPI (Standard Commands for Programmable Instruments) commands follow a tree-like structure, organized into nodes.
COMMAND OVERVIEW Query A query is a simple or compound command followed by a question mark (?). A parameter (data) is returned. Example SENSe:RANGe? Command Forms Commands and queries have two different forms, long and short. The command syntax is written with the short form of the command in capitals and the remainder (long form) in lower case. The commands can be written either in capitals or lower-case, just so long as the short or long forms are complete.
GOM-804 & GOM-805 User Manual Any of NR1,2,3 1,1.5,4.5e-1 ASCII text string TEST_NAME Marks the end of a command line. The following Message Terminator (EOL) messages are in accordance with IEEE488.2 standard. Message Separator 104 Remote Command LF, CR, CR+LF, LF+CR The most common EOL character is CR+LF Return Message LF User configurable (excluding GPIB) See page 71. EOL or ; Command separator.
COMMAND OVERVIEW Command List Binning Commands (GOM-805 only) BINNing:COUNt:CLEar ....................................................................... 108 BINNing:COUNt:TOTal ....................................................................... 108 BINNing:COUNt:OUT ......................................................................... 108 BINNing:COUNt:RESult ................................................................ 108 BINNing:LIMit:LOWer .............................................
GOM-804 & GOM-805 User Manual Sense Commands SENSe:AUTo ....................................................................................... 122 SENSe:DISPlay .................................................................................... 122 SENSe:FUNCtion ................................................................................ 122 SENSe:RANGe .................................................................................... 123 SENSe:SPEed ...............................................
COMMAND OVERVIEW TEMPerature:CONVersion:RESistance ................................................. 135 TEMPerature:CONVersion:TEMPerature .............................................. 136 TEMPerature:DATa .............................................................................. 136 TEMPerature:STATe ............................................................................. 136 TEMPerature:UNIT ..............................................................................
GOM-804 & GOM-805 User Manual BINNing Commands Binning commands are only applicable to GOM-805. BINNing:COUNt:CLEar Set Query Description Clear all bin sorting function test result counts. Syntax BINNing:COUNt:CLEar Parameter/ BINNing:COUNt:TOTal Query Description Returns the total number (count total) of test bin results.
COMMAND OVERVIEW Parameter 1~8 Return parameter 0~99999999 Example BINN1:COUN:RES? >100 Indicates that bin1 has a pass count of 100. Set BINNing:LIMit:LOWer Query Description Sets or returns the lower limit value (absolute value) for the selected bin. Syntax Query Syntax BINNing:LIMit:LOWer {[,]} BINNing:LIMit:LOWer? Parameter 1~8 000.0000~999.
GOM-804 & GOM-805 User Manual Example BINN1:LIM:UPP 0.95,maohm Sets bin1 upper limit value to 0.95MΩ. BINN1:LIM:UPP? >0.9500E+6 Returns the upper limt as 0.95MΩ. Set BINNing:PERCent:LOWer Query Description Sets or returns the lower value percentage value for the selected bin. The value is a percentage offset from the reference value. Syntax Query Syntax BINNing:PERCent:LOWer BINNing:PERCent:LOWer? Parameter 1~8 000.00~999.99 Return parameter 000.00~999.
COMMAND OVERVIEW Set BINNing:LIMit:BEEPer Query Description Sets or returns beeper mode for the bin sorting function. Syntax Query Syntax BINNing:LIMit:BEEPer {OFF|PASS|FAIL} BINNing:LIMit:BEEPer? Parameter/ Return parameter OFF Turns the beeper off. PASS The beeper will sound on a pass test result. FAIL The beeper will sound on a fail test result. Example BINN:LIM:BEEP OFF Turns the beeper off.
GOM-804 & GOM-805 User Manual Example BINN:LIM:MODE DPER Sets the mode to Δ%. Set BINNing:LIMit:REFerence Query Description Sets or returns the limit reference value for the bin sorting function. Syntax Query Syntax BINNing:LIMit:REFerence {[,]} BINNing:LIMit:REFerence? Parameter 000.0001~999.9999 mohm/ohm/kohm/maohm,unit If the unit is not set, the unit will be automatically set by the present range. Return parameter 000.0001~999.
COMMAND OVERVIEW Calculate Commands Set CALCulate:COMPare:BEEPer Query Description Sets or returns the compare function beeper mode. Syntax Query Syntax CALCulate:COMPare:BEEPer {OFF|PASS|FAIL} CALCulate:COMPare:BEEPer? Parameter/ Return parameter OFF Turns the beeper off. PASS The beeper will sound on a pass test result. FAIL The beeper will sound on a fail test result. Example CALC:COMP:BEEP FAIL Sets the beeper on when the test result is a fail.
GOM-804 & GOM-805 User Manual Set CALCulate:COMPare:LIMit:MODE Query Description Sets or returns the compare mode for the compare function. Syntax Query Syntax CALCulate:COMPare:LIMit:MODE {ABS|DPER|PER} CALCulate:COMPare:LIMit:MODE? Parameter/ Return parameter ABS The test results are judged from absolute values. DPER The test results are judged from a reference value ± a percentage offset. (delta percentage) PER The test results are displayed as a percentage of the reference value.
COMMAND OVERVIEW CALCulate:COMPare:LIMit:RESult Query Description Returns the compare function test result. Query Syntax CALCulate:COMPare:LIMit:RESult? Return parameter Example CALC:COMP:LIM:RES? >2 Indicates that the test result is HI. 0: LO 1: IN 2: HI Set CALCulate:COMPare:LIMit:UPPer Query Description Sets or returns the upper limit value for the compare function.
GOM-804 & GOM-805 User Manual Set CALCulate:COMPare:PERCent:LOWer Query Description Sets or returns the lower limit percent value for the compare function. Syntax Query Syntax CALCulate:COMPare:PERCent:LOWer CALCulate:COMPare:PERCent:LOWer? Parameter 000.00~999.99 Return parameter 000.00~999.99 Example CALC:COMP:PERC:LOW 10.00 Sets the lower limit percent value to -10.00%. CALC:COMP:PERC:LOW? >10.00 Returns the lower limit as -10.00%.
COMMAND OVERVIEW Example CALC:SCAN:CHAN 5 Sets the channel to 5. Set CALCulate:SCAN:DELay Query Description Sets or returns the interval delay for the scan function. Syntax Query Syntax CALCulate:SCAN:DELay CALCulate:SCAN:DELay? Parameter/ Return parameter Example CALC:SCAN:DEL 500 Sets interval delay of the scan to 500ms. 400~30000 Unit:ms Set CALCulate:SCAN:LIMit:LOWer Query Description Sets or returns the lower limit value for the scan function.
GOM-804 & GOM-805 User Manual DPER Example The test results are judged from a reference value ± a percentage offset. (delta percent) CALC:SCAN:LIM:MODE ABS Sets compare mode to absolute values. Set CALCulate:SCAN:LIMit:REFerence Query Description Sets or returns the reference limit for the scan function. Syntax Query Syntax CALCulate:SCAN:LIMit:REFerence {[,]} CALCulate:SCAN:LIMit:REFerence? Parameter 000.0001~999.
COMMAND OVERVIEW Set CALCulate:SCAN:PERCent:LOWer Query Description Sets or returns lower limit percent value for the scan function. Syntax Query Syntax CALCulate:SCAN:PERCent:LOWer CALCulate:SCAN:PERCent:LOWer? Parameter 000.00~999.99 Return parameter 000.00~999.99 Example CALC:SCAN:PERC:LOW 10.00 Sets the lower limit percent value to -10.00%. CALC:SCAN:PERC:LOW? >10.00 Returns the lower limit as -10.00%.
GOM-804 & GOM-805 User Manual Memory Commands MEMory:CLEar Set Query Description Clears the data from the selected memory slot. Syntax MEMory:CLEar Parameter Example MEM:CLE 1 Clear data from memory slot 1. 1~20 MEMory:RECall Set Query Description Recalls the settings from the selected memory slot. Syntax MEMory:RECall Parameter Example MEM:REC 1 Recall the settings from memory slot 1.
COMMAND OVERVIEW Example MEM:STAT? > NFFNN-NNNNN-NNNNN-NNNNN Indicates that memory slots 2 and 3 have data and that all other memory slots are empty.
GOM-804 & GOM-805 User Manual Sense Commands Set SENSe:AUTo Query Description Sets or returns the auto-range state. Syntax Query Syntax SENSe:AUTo | {OFF|ON} SENSe:AUTo? Parameter/ Return parameter 0:OFF. 1:ON. OFF Auto-Range is off. ON Auto-Range is on. Example SENS:AUT ON Sets auto-range mode on. Set SENSe:DISPlay Query Description Sets or returns the display mode. There are two display modes, normal and simple.
COMMAND OVERVIEW Parameter/ Return parameter Example OHM OHM MODE COMP COMP MODE BIN BIN MODE TC TC MODE TCONV TCONV MODE SCAN SCAN MODE DIODE DIODE MODE SENS:FUNC OHM Sets ohm mode on. Set SENSe:RANGe Query Description Sets or returns the range of the present function. Syntax Query Syntax SENSe:RANGe SENSe:RANGe? Parameter 5E-2 ~ 5E+6 Return parameter 5E-2 ~ 5E+6 Example SENS:RANG 0.05 Sets range to 50mΩ. SENS:RANG? >5.0000E-2 Returns the range as 50mΩ.
GOM-804 & GOM-805 User Manual Set SENSe:REL:DATa Query Description Sets or returns the relative value for the relative function. Syntax Query Syntax SENSe:REL:DATa SENSe:REL:DATa? Parameter 0.0000~500.00 The unit will be auto set by the present range. Return parameter ±0.0000~5.1000E±X Example SENS:REL:DAT 490.32 Sets the relative function value to 490.32Ω. SENS:REL:DAT? >4.9032E+2 Returns the relative value (490.32Ω).
COMMAND OVERVIEW Parameter/ Return parameter Example 0:OFF. 1:ON. OFF Turn the real time function off. ON Turn the real time function on. SENS:REAL:STAT ON Turns the real time function on.
GOM-804 & GOM-805 User Manual Source Commands Set SOURce:DRY Query Description Sets or returns the dry circuit test mode. Only applicable to the GOM-805. Syntax Query Syntax SOURce:DRY { | {OFF|ON} SOURce:DRY? Parameter/ Return parameter 0:OFF. 1:ON. OFF Turn dry circuit test mode off. ON Turn dry circuit test mode on. Example SOUR:DRY On Turns the dry circuit test mode on. Set SOURce:DRIVe Query Description Sets or returns the drive mode.
COMMAND OVERVIEW Status Commands STATus:PRESet Set Query Description Sets the QUESTionable enable register to zero. Syntax STATus:PRESet Parameter Set STATus:QUEStionable:ENABle Query Description Sets or returns the Questionable Data Enable register. Syntax Query Syntax STATus:QUEStionable:ENABle STATus:QUEStionable:ENABle? Parameter/ Return parameter Example STAT:QUES:ENAB 2560 Sets the Questionable Data Enable register to 000101000000000. 0~32767.
GOM-804 & GOM-805 User Manual System Commands Set SYSTem:AVERage:DATa Query Description Sets or returns the number of measurements used for the average function. Syntax Query Syntax SYSTem:AVERage:DATa SYSTem:AVERage:DATa? Parameter/ Return parameter Example SYST:AVER:DAT 5 5 measurements are used to perform the average function. 2~100 Set SYSTem:AVERage:STATe Query Description Sets or returns the average function state.
COMMAND OVERVIEW Example SYST:BRIG 4 Turns the brightness level to 4. SYSTem:ERRor Query Description Returns the current system error, if any. Query Syntax SYSTem:ERRor? Return parameter Example SYST:ERR? >0,”No error”. Indicates that there is no error message. Error number,”Error message” Set SYSTem:HANDler Query Description Sets or returns the handler state.
GOM-804 & GOM-805 User Manual Set SYSTem:LFRequency Query Description Sets or returns the frequency setting for the line filter. Syntax Query Syntax SYSTem:LFRequency {AUTO | 50 | 60} SYSTem:LFRequency? Parameter/ Return parameter AUTO The frequency setting for the line filter is automatically detected. 50 The frequency is 50Hz. 60 The frequency is 60Hz. Example SYST:LFR 60 Sets the line frequency to 60Hz. SYST:LFR? >60Hz Returns the line frequency as 60Hz.
COMMAND OVERVIEW Example SYST:MDEL:DAT 1.105 Sets the delay time of measure is 1.1s. SYST:MDEL:DAT? >001.100 Returns the measurement delay as 1.1s. Set SYSTem:MDELay:STATe Query Description Sets or returns the measurement delay function state. Syntax Query Syntax SYSTem:MDELay:STATe | {OFF|ON} SYSTem:MDELay:STATe? Parameter/ Return parameter 0:OFF. 1:ON. OFF Turn the measurement delay off. ON Turn the measurement delay on.
GOM-804 & GOM-805 User Manual Set SYSTem:PWM:OFF Query Description Sets or returns the duty OFF period for the PWM drive mode. Syntax Query Syntax SYSTem:PWM:OFF SYSTem:PWM:OFF? Parameter/ Return parameter Example SYST:PWM:OFF 200 Sets the duty OFF period to 200 ms. 100~9999 Unit:ms SYSTem:SERial Query Description Returns the serial number.
COMMAND OVERVIEW Temperature Commands Set TEMPerature:AMBient:DATa Query Description Sets or returns the user-set ambient temperature value for the temperature compensation and the temperature conversion function. Syntax Query Syntax TEMPerature:AMBient:DATa TEMPerature:AMBient:DATa? Parameter -50.0~399.9 (Unit: ºC) Return parameter -50.0~399.9 (Unit: ºC) Example TEMP:AMB:DAT 25.6 Sets the user ambient temperature value to +25.6ºC. TEMP:AMB:DAT? >25.
GOM-804 & GOM-805 User Manual Set TEMPerature:COMPensate:COEFficient Query Description Sets or returns the temperature coefficient for temperature compensation function. Syntax Query Syntax TEMPerature:COMPensate:COEFficient TEMPerature:COMPensate:COEFficient? Parameter/ Return parameter Example TEMP:COMP:COEF 3930 Sets the temperature coefficient to 3930ppm.
COMMAND OVERVIEW Set TEMPerature:CONVersion:DISP Query Description Sets or returns the temperature display mode for the temperature conversion function. Syntax Query Syntax TEMPerature:CONVersion:DISP TEMPerature:CONVersion:DISP? Parameter/ Return parameter Example TEMP:CONV:DISP 1 Sets the temperature display mode for the temperature conversion function is ΔT. 1:ΔT 2:T TEMPerature:CONVersion:MATH:DATa Query Description Returns conversion function deviation value.
GOM-804 & GOM-805 User Manual Example TEMP:CONV:RES 10.00,maohm Sets initial resistance value to 10.00MΩ. TEMP:CONV:RES? >10.0000E+6 Returns the initial resistance as 10.00MΩ. Set TEMPerature:CONVersion:TEMPerature Query Description Sets or returns the initial temperature for the temperature conversion function. Syntax Query Syntax TEMPerature:CONVersion:TEMPerature TEMPerature:CONVersion:TEMPerature? Parameter -50.0~399.9 (Unit: ºC) Return parameter -50.0~399.
COMMAND OVERVIEW Example TEMP:STAT ON Sets the temp function on. Set TEMPerature:UNIT Query Description Sets or returns the temperature unit. (Only used for the display readback.) Syntax Query Syntax TEMPerature:UNIT {DEGC|DEGF} TEMPerature:UNIT? Parameter/ Return parameter DEGC ºC DEGF ºF Example TEMP:UNIT DEGF Sets temperature unit to ºF (Fahrenheit).
GOM-804 & GOM-805 User Manual Trigger Commands READ Query Description Returns the measurement value. Query Syntax READ? Return parameter Example READ? >+2.2012E+0 Returns the measurement. ±0.0000~5.1000E±X MEASure Query Description Returns the results of the selected channel in the scan mode, including HI/LO/IN and value. Query Syntax MEASure? Parameter Channel 1~100 Return parameter 0|1|2, 0:LO 1:IN 2:HI : Measurement result. Example MEAS1? >1,+0.
COMMAND OVERVIEW Example SHOW? Returns 1111111111______________________________________ ________________________________________________ ____. Set TRIGger:EDGE Query Description Sets or returns the trigger edge (falling or rising edge). Syntax Query Syntax TRIGger:EDGE {RISING|FALLING} TRIGger:EDGE? Parameter/ Return parameter RISING Select rising trigger. FALLING Select falling trigger. Example TRIG:EDGE FALLING Sets the trigger to falling edge.
GOM-804 & GOM-805 User Manual Example TRIG:DEL:STAT OFF Turns the trigger delay function off. Set TRIGger:SOURce Query Description Sets or returns current trigger source. Syntax Query Syntax TRIGger:SOURce {INT|EXT} TRIGger:SOURce? Parameter/ Return parameter INT Internal trigger mode. EXT External trigger mode. Example TRIG:SOUR EXT Sets the current trigger source to external trigger.
COMMAND OVERVIEW Userdefine Commands Set USERdefine:ACTive Query Description Sets or returns the active output state of the selected Userdefine pin. Syntax Query Syntax USERdefine:ACTive USERdefine:ACTive? Parameter/ Return parameter Userdefine pin 1~2 1:active low state 2:active high state Example USER1:ACT 1 Sets the userdefine1 pin IO to active low state.
GOM-804 & GOM-805 User Manual Syntax Query Syntax USERdefine:LOGic USERdefine:LOGic? Parameter/ Return parameter Userdefine pin 1~2 1:off(only judge first data) 2:logical and. 3:logical or. Example USER1:LOG 1 Sets the operator of userdefine1 to off. (I.e., only the first operand determines the output of userdefine1.) Set USERdefine:SEConddata Query Description Sets or returns the second operand for the selected user define pin.
COMMAND OVERVIEW IEEE 488.2 Common Commands *CLS Set Query Description Clears the Event Status register (Output Queue, Operation Event Status, Questionable Event Status, Standard Event Status). Syntax *CLS Parameter Set *ESE Query Description Sets or returns the ESER (Event Status Enable Register) contents.
GOM-804 & GOM-805 User Manual *IDN Query Description Returns the manufacturer, model No., serial number and system version number. Query Syntax *IDN? Return parameter Example *IDN? >GWINSTEK,GOM805,GXXXXXXXX,V1.00. 31 characters Set *OPC Query Description Sets or returns the operation complete bit (bit0) in SERS (Standard Event Status Register) when all pending operations are completed.
COMMAND OVERVIEW Syntax Query Syntax *SRE *SRE? Parameter/ Return parameter Example *SRE 7 Sets the SRER to 00000111 *SRE? >3 SRER=00000011 0~255 *STB Query Description Returns the SBR (Status Byte Register) contents. Query Syntax *STB? Return parameter Example *STB? >81 SESR=01010001 0~255 *TRG Set Description Manually triggers the instrument.
GOM-804 & GOM-805 User Manual Status system The diagram below is a description of the status system.
FAQ FAQ ● What are the different measurement speeds? ● The GOM-804/805 performance does not match the specifications. What are the different measurement speeds? There are two measurement speeds for both resistance and temperature measurement. At the slow measurement rate, the measurement speed is 10 samples/s and at the fast measurement rate the measurement speed is at 60 samples/s. The GOM-804/805 performance does not match the specifications.
GOM-804 & GOM-805 User Manual APPENDIX Function Combinations Function Selection Combinations ........................ 149 Temperature Measurement Reference Temperature Table ............................... 150 RTD Sensors ........................................................ 151 Optional Platinum Sensor.................................... 151 Specifications Resistance Measurement ..................................... 153 Dry Resistance Measurement ..............................
APPENDIX Function Selection Combinations Function Combination Table Overview The following table shows which functions can be used with the Relative, Drive and Dry Circuit functions. Function Rel Dry( *1 ) Drive( *2 ) Ohm ✔ ✔ ✔ Comp ✔ ✔ ✔ Bin ✔ ✔ ✔ TC ✔ ✔ ✔ Tconv ✔ ✔ ✔ Temp ✔ ✔ ✔ Scan ✘ ✘ ✘ Diode ✘ ✘ ✘ *1. When the Dry Circuit measurement function is turned on, only the DC+, DC- and Pulse signals can be selected.
GOM-804 & GOM-805 User Manual Temperature Measurement Reference Temperature Table Overview Background Element (H 2 ) (Ne) (O 2 ) (Ar) (Hg) (H 2 O) (Ga) (In) (Sn) (Zn) (Al) (Ag) (Au) 150 The International Temperature Scale (ITS) is based on the following table. The table has 17fixed calibration points as of 1990.
APPENDIX RTD Sensors Overview Resistive Thermal Devices (RTDs) are commonly used as temperature sensors. RTDs change resistance linearly over a specific range of temperature. The table below shows some of the inherent features of RTDs compared to thermocouples. Feature Accuracy Resolution Speed of response Self-heating Long term stability Output characteristics Description Higher accuracy 0.1~1.0˚C, higher resolution Slower Yes Good Approx. 0.
GOM-804 & GOM-805 User Manual PT-100 sensor are listed below: Type PT-100 Standard ITS90 Temperature Calculation Example Alpha 0.003850 Beta 0.10863 Delta 1.49990 Ω @ 0˚C 100Ω Example—Calculating the resistance of a PT-100 RTD at 100˚C (T). The following R0 (Ω at 0˚C), alpha, beta, and delta values are used for the PT-100 RTD: T=100˚C R 0 ( Ω at 0˚C) = 100 Ω Alpha=0.003850 Beta=0.10863 Delta=1.49990 A, B, and C are calculated according to equations listed above: A=0.00391 B=5.77e-7 C=4.
APPENDIX Specifications Conditions Background The specifications are applicable under the following conditions: A 1-year calibration cycle. An operating temperature of 18 to 28 ˚C (64.4 to 82.4˚F). Relative humidity not exceeding 80%. Accuracy is expressed as ±(percentage of reading + percentage of range). The instrument requires 30 minutes warm-up time and must be operated at the slow measurement rate to achieve rated accuracy.
GOM-804 & GOM-805 User Manual temperature and the calibration temperature. *Accuracy for Measuring current is ± 3%. Measurement Auto-ranging Over input range Comparator Buzzer mode switchable Four-terminal method. Provided. “------” indicates over range 20 sets of comparator status can be selected. OFF, PASS, FAIL Dry Resistance Measurement Range 500mΩ 5Ω 50Ω Measuring Current 100mA 10mA 1mA Accuracy ±(0.3%+0.05%) ±(0.3%+0.05%) ±(0.3%+0.
APPENDIX Interface Handler interface* Scan* Communication Interfaces Signal: Trigger: TTL input Signal: LOW, HIGH, FAIL, PASS, EOT, READY, BIN 1~8, BIN OUT: total 15 TTL outputs. Signal: RELAY, PASS, LOW, HIGH, CLOCK, STRB total 6 TTL outputs. GOM-804: USB/RS-232 GOM-804G: USB/RS-232/GPIB GOM-805: USB/RS-232/GPIB *The Scan and Handler interface use the same connector. Environmental Operation Environment Storage Conditions Indoor use, altitude up to 2000m. Operation Environment: 0˚C to 40˚C.
GOM-804 & GOM-805 User Manual Dimensions DC Milliohm Meter Ohm Compare Binning TC TCONV TEMP REL Scan Dry RT Trigger ESC GUARD Display Diode Local SOURCE SENSE SENSE Rx 275.5 282.9 156 214.0 222.8 Range Drive SOURCE POWER 101.5 Speed GND Enter 85.
APPENDIX Declaration of Conformity We GOOD WILL INSTRUMENT CO., LTD. No.7-1, Jhongsing Rd., Tucheng Dist., New Taipei City, Taiwan GOOD WILL INSTRUMENT (SUZHOU) CO., LTD. No.
GOM-804 & GOM-805 User Manual INDEX Binning function setting ............................................................... 46 Characteristics .................................................. 10 Compare function setting ............................................................... 41 Declaration of conformity ............................. 157 Dimensions ..................................................... 156 Diode ................................................................. 40 Display mode ..
Index output ............................................................... 88 overview .......................................................... 82 pinout ............................................................... 83 setup ................................................................. 84 Service contact ................................................ 147 Specifications .................................................. 153 Status system ..................................................
