Operating Instructions ACT720 True RMS Datalogging Multimeter 0.000 AUTO ~ O 2 1 3 V 4 5 MultiLog 72O True RMS ▼ RANGE Hz = ▼ AC/DC SELECT HOLD AUTO POWER OFF Ω Temp A mA CAP ► µA mV OFF VDC ◄ VAC OFF 1OA 1OA µA MAX 1OA FUSED MAX O.5A FUSED COM V.TEMP Ω.CAP CATIV 6OOV CAT III 1OOOV Using high end technology, the ACT 720 combines a wide range of measurements with datalogging capabilities to help the engineer monitor and locate faults – fast. www.actmeters.
ACT 720 Important Information The ACT 720 measures AC/DC voltage and current, resistance, frequency, capacitance, temperature, diode and continuity. The ACT 720 offers a built-in datalogger and an optical RS-232 interface. The meter stores 43,000 data points in internal memory.
ACT 720 Important Information 1. Improper use of this meter can cause damage, shock, injury or death. Read and understand this user manual before operating the meter. 2. Make sure any covers or battery doors are properly closed and secured. 3. Always remove the test leads before replacing the battery or fuses. 4. Inspect the condition of the test leads and the meter itself for any damage before operating the meter. Repair or replace any damage before use. 5.
ACT 720 Important Information important PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level. Note examples include protected electronic circuits. OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation.
ACT 720 Specifications DC VOLTAGE Range Accuracy 50.00 mV 0.12% + 2d 500.0 mV 0.06% + 2d 5.000V, 50.00V, 500.0V, 1000V 0.08% + 2d NMRR: >60dB @ 50/60Hz, CMRR: > 120dB @ DC, 50/60Hz, Rs+1kΩ Input impedance: 10MΩ, 16pF nominal (44pF nominal for 50mV & 500mV ranges) AC VOLTAGE Range 50Hz/60Hz 50.00mV, 500.0mV, 5.000V, 50.00V, 500.0V, 1000V 0.5% + 3d 40Hz to 500Hz 50.00mV, 500.0mV 0.8% + 3d 5.000V, 50.00V, 500.0V 1.0% + 4d 1000V 1.2% + 4d Up to 20kHz 50.00mV, 500.0mV 0.5dB* 5.000V, 50.
ACT 720 AC CURRENT Range Accuracy Burden Voltage 500.0µA, 5000µA 0.6% + 3d 0.15mV/µA 50.00mA, 500.0mA 0.6% + 3d 3.3mV/mA 5.000A, 10.00A* 0.6% + 3d 0.03V/A 500.0µA, 5000µA 0.8% + 4d 0.15mV/µA 50.00mA 0.8% + 4d 3.3mV/mA 500.0mA 1.0% + 4d 3.3mV/mA 5.000A, 10.00A* 0.8% + 4d 0.03V/A 50 / 60Hz 40Hz to 1kHz *10A continuous, 20A for 30-second max with 5 minute cool down interval TEMPERATURE Range Accuracy -50°C to 1000°C 0.3% + 3d -58°F to 1832°F 0.
ACT 720 FREQUENCY Function Sensitivity (ACrms) Range mV 300mV 10Hz - 125kHz 5V 2V 10Hz - 125kHz 50V 20V 10Hz - 20kHz 500V 80V 10Hz - 1kHz 1000V 300V 10Hz - 1kHz Ω, Cx, diode 300mV 10Hz - 125kHz µA, mA, A 10% F.S. 10Hz - 125kHz Accuracy: 0.01% + 2d Accuracy Notes: Accuracy is ± (% reading digits + number of digits), or as otherwise specified, at 23ºC ±5ºC < 75% R.H. True RMS accuracies are specified from 5% to 100% of range or as otherwise specified.
ACT 720 Temp. Coefficient Nominal 0.15 x specified accuracy per ºC (between 0 and 18ºC or 28 to 50ºC), or as otherwise specified Power Supply 9V battery (NEDA 1604, JIS006P or IEC6F22) AC Sensing True RMS Auto Power Off After 17 minutes or inactivity with no input signal Safety Intended for indoor use and protected by double insulation per EN61010-1 and IEC61010-1 2nd Edition (2001) to CAT III 1000V & CAT IV 600V. The meter also meets UL3111-1(1994)* and CSA C22.2 No.
ACT 720 Meter Description 1. 5000 count liquid crystal display 2. Function push buttons 3. Rotary function switch 4. 10A input jack 5. V/Hz/Ω/Cap/Temp input jack 6. COM input jack 7. mA/µA current input jack 8. RS232 connector (rear) 0.000 AUTO ~ O 2 1 3 V 4 5 1 MultiLog 72O True RMS ▼ RANGE Hz = ▼ AC/DC SELECT 8 HOLD 2 AUTO POWER OFF Ω Temp A mA CAP ► µA mV OFF VDC 3 ◄ VAC 4 7 6 5 OFF 1OA 1OA µA MAX 1OA FUSED www.actmeters.com +44(0)1744 886660 MAX O.
ACT 720 Features Analog Bargraph Display Visual indication of measurement in the tradition of an analog meter pointer. The bargraph consists of 52 discrete viewing segments. The bargraph is useful for detecting faulty contacts, identifying potentiometer graduations and viewing signal spikes. True RMS v Average Sensing (AC Measurements) True RMS meters can accurately measure non-sinusoidal waveforms, as well as distorted sine waves that contain harmonics.
ACT 720 Measurement Considerations NOTICE: Read and understand all WARNING and CAUTION statements listed in the safety section of this operation manual prior to using this meter 1. Always move the rotary function switch to the OFF position when the meter is not in used. The meter has Auto Power OFF that automatically shuts the meter OFF if 17 minutes elapse without activity 2. If ‘OL’ appears on the display during a measurement, the measurement exceeds the range selected. Change to a higher range.
ACT 720 Resistance and Continuity Measurements 1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the V/Ω/CAP jack 2. Set the function switch to the ‘Ω ‘ position 3. Press the SELECT key momentarily to select Continuity (if required) 4. Touch the test probe tips across the circuit or part under test. It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading. 5.
ACT 720 Important Information Frequency Measurements 1. Connect and make the measurement required as described in the previous paragraphs 2. Press the Hz key to select the Frequency (Hz) function 3. Read the frequency on the display Notes on Sensitivity Input sensitivity varies automatically with function range selected. The mV function has the highest (300mV) and the 1000V range has the lowest (300V) sensitivity.
ACT 720 Smart Power Auto Power Off Smart Power shuts the meter down automatically after approximately 17 minutes of inactivity. The 17 minute time period is reset any time the rotary switch is moved or as long as the signal being fed into the meter is greater than 10% of the range. This prevents auto powering off during long terms. To wake the meter, press the SELECT key or turn the meter off and on again. Audible Beeper The audible beeper can be disabled by pressing the Hz key while turning the meter on.
ACT 720 Datalogging Datalogging Basics The ACT 720 can store up to 43,000 readings automatically. These readings can be viewed on the LCD display or transferred to a PC using the PC interface cable and Windows software included. Datalogging NOTE: Each time the datalogging ‘Strt’ process is initiated, existing data will be erased. Always review or download stored data before beginning a new recording session. 1. Press the timer key to enter the sample rate mode. The default setting is 0.05 seconds 2.
ACT 720 Recalling Stored Readings To recall stored data, press the START, UP or DOWN arrow key momentarily to ‘CALL’ the logged data. The LCD will show a flashing ‘C’ (CALL) to indicate that the data shown is logged data. The data can also be transferred to a PC using the supplied Windows software and interface cable. When the datalogger is paused or when the CALL mode is activated, select from the following activities for datalog viewing: 1.
ACT 720 Datalogging Sample Rate Press the TIMER key momentarily to display the datalogger’s sampling rate (recording interval). The factory default interval is 0.05 seconds, meaning that a reading will be logged every 5 hundredths of a second. Press the UP and DOWN arrow key momentarily to select an alternate sampling interval. Choose from 0.05 up to 480 seconds. Note that the fastest sampling interval for Temperature and Resistance readings is 0.2 seconds: For Frequency it is 0.
ACT 720 WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input jacks and turn OFF the meter before opening the case. Do not operate with open case. Install only the same type of fuse or equivalent. Cleaning and Storage Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solvents. If the meter is not to be used for periods of longer than 60 days, remove the battery and store it separately.
ACT 720 Battery Replacement Loosen the 2 screws from the battery access door of the case bottom. Lift the battery access door and thus battery compartment up. Replace the battery. Refasten the screws. Battery: Standard 9V Alkaline (NEDA 1604, JIS006P, IEC6F22) Fuse Replacement 1. Remove the four screws from the case bottom and stand using a Philips head screwdriver 2. Lift the end of the case bottom nearest the input jacks until it unsnaps from the case top 3. Replace the battery or blown fuses(s) 4.
