ACT720_Operating Manual
Contents
1. 4 Press the UP or DOWN arrow key momentarily while holding the HOLD key to search all of the trends in the recorded data list This LCD will indicate MIN or MAX for each trend in the list Meter Memory Full When the meter memory is full the datalogging process ceases automatically and the meter will enter the Auto Power OFF mode Note that while datalogging the Auto Power OFF mode is disabled Low Battery Datalogging If the 9V battery voltage falls critically low while the meter is datalogging the meter automatically ceases logging to ensure the integrity of the data recorded Non Volatile Data Storage Data are stored in non volatile memory shortly after each measurement is taken to maximize data safely However the end of data information can only be stored after a datalogging event is complete Always StoP the datalogger before switching off the meter www actmeters com 44 0 1744 886660 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 4 seconds and for Capacitance it is 1 second Press the2. Average Sensing AC Measurements True RMS meters can accurately measure non sinusoidal waveforms as well as distorted sine waves that contain harmonics Average sensing is a fast accurate and cost effective method of measuring pure sine wave signals However non sinusoidal waveforms cannot accurately be measured using average sensing techniques Backlit Display The ACT 720 is equipped with a backlight for viewing the LCD display in poorly lit areas Data Hold The HOLD function freezes the reading on the display for later viewing Manual and Automatic Ranging The ACT 720 is autoranging with manual override Smart Power Auto Power Off Smart power shuts the meter down automatically after appromimately 17 minutes of inactivity Audible Beeper To disable the audible meter tones press and hold the Hz key while powering the meter Automatic Test Lead Resistance Compensation Automatically compensates for the resistance of the test leads as well as the internal protection circuitry ensuring greater accuracy of low resistance measurements Datalogging The ACT 720 will store reading for review on the LCD display or download to a PC using the supplied software www actmeters com 44 0 1744 886660 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 ik Always move the rotary function switch to the OFF position w
3. EC61010 1 2nd Ed Car IV E M C Meets EN61326 1997 1998 A1 EN61000 4 2 1995 and EN61000 4 3 1996 Also meets former standards EN55011 1991 and EN50082 1 1997 In an RF field of 3V m capacitance function is not specified Other function ranges Total Accuracy specified accuracy 30 digits Performance gt 3V m is not specified Overload Protection UA mA Range 0 63 500V IR 200kA F fuse A Range 12 5A 500V IR 20kA F fuse V Range 1050V rms 1450V peak mV Q and other 600VDC VAC rms Power Consumption 2 7mA typical Dimension 186mm x 87mm 35 5mm with holster Weight 430g with holster www actmeters com 44 0 1744 886660 ACT 720 Meter Description OO Dn Oe ON ie OOS a 5000 count liquid crystal display Function push buttons Rotary function switch 10A input jack V Hz Q Cap Temp input jack COM input jack mA pA current input jack RS232 connector rear o 1 2 3 4 5 PTL CEETLETETI ETEL ETETA TELI ETTEI CETEL MultiLog 720 True RMS Ce acoc SELECT RANGE HOLD 4 con A Q CAP max 0 sa JIL catv soovJ FUSED TAT III 1000V 4 www actmeters com 44 0 1744 886660 ANON B w 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
4. Note examples include household office and laboratory appliances OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations Note examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation Note examples include electricity meters and primary over current protection equipment www actmeters com 44 0 1744 886660 ACT 720 Specifications DC VOLTAGE 50 00 mV 0 12 2d 500 0 mV 0 06 2d 5 000V 50 00V 500 0V 1000V 0 08 2d NMRR gt 60dB 50 60Hz CMRR gt 120dB DC 50 60Hz Rs 1kQ Input impedance 10MQ 16pF nominal 44pF nominal for 50mV amp 500mV ranges AC VOLTAGE 50 00mV 500 0mV 5 000V 50 00V 500 0V 1000V 50 00mV 500 0mV 5 000V 50 00V 500 0V 50 00mvV 500 0mV 5 000V 50 00V 500 0V 3db 1000V Unspecified Specified from 30 to 100 of range CMRR gt 60dB DC to 60Hz Rs 1kQ Input Impedance 10MQ 16pF nominal 44pF nominal for 50mV amp 500mV ranges DC CURRENT 500 0uA 5000 UA 0 2 4d 0 15mV yA 50 00mA 500 0mA 0 2 4d 3 3mV mA 5 000A 10 00A 0 2 4d 0 03V A 10A continuous 20A for 30 seconds max with a 5 minute cool down interval www actmeters com 44 0 1744 886660 ACT 720 AC CURRENT 500 0pA 5000A 0 15mV pA 10A c
5. Operating Instructions ACT 7 20 True RMS Datalogging Multimeter MultiLog 720 True RMS w Ce SELECT RANGE 4 A A n M max osa JIL catv sou FUSED TAT gr 1000V FUSED 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 com 44 0 1744 886660 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 Safety International Safety Symbols This symbol adjacent to another symbol or terminal indicates the user must refer to the manual for further information This symbol adjacent to a terminal indicates that under normal use hazardous voltages may be present gt gt Double insulation www actmeters com 44 0 1744 886660 ACT 720 Important Information 10 Ti 12 13 Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operating the meter Make sure any covers or battery doors are properly closed and secured Always remove the test leads before replacing the battery or fuses Inspect the condition of the test leads and the meter itself for any damage before operating the mete
6. TIMER key again to confirm the new setting The Sampling Rate cannot be changed while the meter is datalogging When a Sampling Rate of 20 seconds or longer is selected the meter enters a standby state between readings to conserve battery life While in stand by the bargraph will continue to operate To wake up meter from a stand by state in order to view a real time measurement press the SELECT key momentarily RS232C PC Computer Interface Capabilities This device is equipped with an optical isolated interface port located on the rear of the meter The data acquisition package includes an interface cable and Windows data acquisition software The software provides in the format of a digital meter a analog meter a comparator meter and a graphical display Refer to the README file on the software disk for further details www actmeters com 44 0 1744 886660 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 UL Listed The UL mark does not indicate that this product has been evaluated for the acc
7. and F Touch the Temperature Probe tip to the device under test Oi oP to N Wait 30 seconds for the measurement to stabilize then read the display www actmeters com 44 0 1744 886660 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 www actmeters com 44 0 1744 886660 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 Press the up down arrow keys to select the desired sample rate Press the timer key to store the selected sample rate Press and hold the Jf Strt PAUS StoP key for 1 second until S
8. hen the meter is not in used The meter has Auto Power OFF that automatically shuts the meter OFF if 17 minutes elapse without activity If OL appears on the display during a measurement the measurement exceeds the range selected Change to a higher range AC DC Voltage Measurements 1 3 Insert the black test lead into the negative COM jack and the red test lead into the positive V jack Set the function switch to the VAC VDC mV position Press the SELECT key momentarily to toggle between AC and DC Read the voltage measurement on the display AC DC Current Measurements CAUTION Do not make current measurements at 20A for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 2 Insert the black test lead into the negative COM jack For current measurements up to 4000p set the function switch to the UA position and insert the red test lead into the mA pA jack For current measurements up to 400mA set the function switch to the mA position and insert the red test lead into the mA pA jack For current measurements up to 10A set the function switch to the A position and insert the red test lead into the A jack Press the SELECT key momentarily to toggle between AC and DC Remove power from the circuit under test and open the circuit at the point where you wish to measure current Touch the black test probe tip to the negative side of the ci
9. ing Temperature 32 to 113 F 0 to 45 C Storage Temperature 4 to 140 F 20 to 60 C Relative Humidity Max 80 up to 87 F 31 C descreasing linearly to 50 at 113 F 45 C lt 80 storage Altitude Operating below 2000 meters www actmeters com 44 0 1744 886660 ACT 720 Temp Coefficient Nominal 0 15 x specified accuracy per C between 0 and 18 C or 28 to 50 C or as otherwise specified Power Supply 9V battery NEDA 1604 JISOO6P 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 amp CAT IV 600V The meter also meets UL3111 1 1994 and CSA C22 2 No 1010 1 92 to CAT III 1000V Terminals to COM ratings V CATEGORY III 1000 VOLTS AC amp DC AND CATEGORY IV 600 VOLTS AC amp DC A MAPA CATEGORY III AND CATEGORY IV 500 VOLTS AC AND 300 VOLTS DC Category IV safety standard for DMMs was first released in IEC61010 1 2nd Edition in year 2001 and was yet a UL published standard at the time this manual was written UL Certification Meters that bear the UL marking have been investigated by UL headquarter in the USA per UL standard UL3111 1 1st Ed to its highest CAT III rating and international standard IEC61010 1 Second Edition year 2001 to CAT IV rating The UL markings as UL Listed Cat III only and UL Classified to I
10. itivity Input sensitivity varies automatically with function range selected The mV function has the highest 300mV and the 1000V range has the lowest 300V sensitivity It is recommended that the user first measure the signal voltage or current level before activating the Hz function to automatically set the most appropriate trigger level You can also press the RANGE button momentarily to select another trigger level manually If the Hz reading becomes unstable select a lower sensitivity to avoid electrical noise If the display is zero select a higher sensitivity Diode Test 1 Insert the black lead into the negative COM jack and the red test lead into the positive jack Set the function to Bf CAP position Press the SELECT key momentarily to select the diode function if required 4 Touch the test probe tips to the diode or semiconductor junction you wish to test Note the meter reading 5 Reverse the test lead polarity by reversing the red and black leads Note this reading 6 The diode or junction can be evaluated as follows A If one reading displays a value and the other reading displays OL the diode is good B If both readings display OL the device is open C If both readings are very small or 0 the device is shorted Temperature Measurements 1 Insert the Temperature Probe into the COM and TEMP input jacks observing polarity Set the function switch to the TEMP position Use the SELECT key to toggle between C
11. ontinuous 20A for 30 second max with 5 minute cool down interval TEMPERATURE 50 C to 1000 C 0 3 3d 58 F to 1832 F 0 3 6d RESISTANCE Range Accuracy Open Circuit Voltage lt 1 3VDC lt 3VDC for 500 amp 5000 ranges CAPACITANCE 50 00nF 500 0nF 0 8 3d 5 00UF 1 0 3d 50 00uUF 2 0 3d 500 0uF 3 5 5d 9999uF 5 0 5d Accuracies with film capacitor or better www actmeters com 44 0 1744 886660 ACT 720 FREQUENCY Accuracy 0 01 2d Accuracy Notes Accuracy is reading digits number of digits or as otherwise specified at 23 C 5 C lt 75 R H True RMS accuracies are specified from 5 to 100 of range or as otherwise specified Maximum Crest Factor lt 3 1 at full scale amp lt 6 1 at half scale with frequency component within the specified frequency bandwidth for non sinusoidal waveforms Audible Continuity Measurement threshold Beeper will sound if measurement is below 200 Beeper will not sound if measurement is above 200Q Beeper may or may not sound if measurement is between 20 and 2000 Response time lt 100us Digital Display 5000 count LCD display 5 per second nominal refresh rate Bar Graph Display 52 segment bargraph 60 per second nominal refresh rate Datalogging Capacity 43000 points Datalog Sample Rate 0 05 0 2 for C F amp O 0 4 for Hz and 1 for C 1 20 40 60 120 240 amp 480 seconds Low Battery Below approx 7V Operat
12. r Repair or replace any damage before use Do not exceed the maximum rated input limits Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard Always discharge capacitors and remove power from the device under test before performing capacitance diode resistance or continuity tests Remove the battery from the meter if the meter is to be stored for long periods To avoid electric shock do not measure AC current on any circuit whose voltage exceeds 500V AC Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the electrical contacts Other means should be used to ensure that the terminals are not live The product is intended only for indoor use If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired Pollution degree 2 www actmeters com 44 0 1744 886660 ACT 720 Important Information PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY Equipment of OVERVOLTAGE CATEGORY 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
13. rcuit and touch the red test probe tip to the positive side of the circuit Apply power to the circuit Read the current on the display www actmeters com 44 0 1744 886660 ACT 720 Resistance and Continuity Measurements 1 5 6 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the V Q CAP jack Set the function switch to the ayy position Press the SELECT key momentarily to select Continuity if required 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 For Resistance tests read the resistance on the display For Continuity tests if the resistance is lt 200 an audible tone will sound Capacitance Measurements 1 Insert the black lead into the negative COM jack and the red test lead into the positive CAP jack Set the function switch to the gt CAP position Press the SELECT key momentarily to select the Capacitance function if required Touch the test leads to the capacitor to be tested and read the measured value www actmeters com 44 0 1744 886660 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 Sens
14. trt appears in the display to start the datalogging process The baragraph display will appear with a single oscillating pointer to indicate the datalogging process is in progress Press the J Strt PAUS StoP key to pause datalogging A blinking H will appear in the display Press Il again to continue datalogging Cont will appear momentarily in the display Press the SELECT key to toggle between the measured value display and the data list item number display Press and hold the key for 1 second until StoP appears in the display to stop the data logging process and store the data www actmeters com 44 0 1744 886660 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 Use the arrow keys to scroll through the data on the meter s LCD display 2 Press and hold the UP or DOWN arrow keys to quickly scan the logged data The meter provides an audible tone when the first or last reading is reached 3 Press the UP and DOWN arrow keys at the same time momentarily to display alternately the MINIMUM and MAXIMUM readings
15. uracy of its readings www actmeters com 44 0 1744 886660 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 JISOO6P 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 Replace the case bottom and ensure that all the gaskets are properly seated and that the two snaps on the case top near the display side are engaged 5 Refasten the screws Fuses FS1 uA mA Range 0 5 0 63 ampere F fast acting ceramic Preferred Ferraz C084205 0 63A Acceptable Bussmann ABC 1 2 0 5A FS2 A Range 12 ampere F fast acting ceramic Preferred Ferraz D085448 12 5A Acceptable Bussmann ABC 12 12A www actmeters com 44 0 1744 886660
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