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USER'S

MANUAL

AM-140
AM-140 TRMS
AM-160
AM-160 TRMS

Digital
Multimeters

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Summary of Contents for AM-140

Page 1: ...USER S MANUAL AM 140 AM 140 TRMS AM 160 AM 160 TRMS Digital Multimeters ...

Page 2: ...s AC DC and Category IV 600 Volts AC DC mAµA Category III and Category IV 600 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 not adopted as an UL published standard at the time this manual was written Per IEC61010 1 2nd Ed 2001 Measurement Category OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energ...

Page 3: ...d replace them immediately Do not measure any current that exceeds the current rating of the protection fuse Do not attempt a current measurement to any circuit where the open circuit voltage is above the protection fuse voltage rating Suspected open circuit voltage should be checked with voltage functions Never attempt a voltage measurement with the test lead inserted into the µA mA or A input ja...

Page 4: ...ures 3 Selector to turn the Power On or Off and Select a function 4 Input Jack for 10A 20A for 30sec current and for T2 function 5 Input Jack for all functions EXCEPT current µA mA A and T2 functions 6 Common Ground reference Input Jack for all functions EXCEPT T2 function 7 Input Jack for milli amp micro amp and T2 functions ...

Page 5: ... is a good example and the AC true RMS function will only give the AC component reading which is at 43 6 of the total effective DC AC RMS reading DC AC True RMS DC AC True RMS calculates both of the AC and DC components given by the expression when making a measurement and can respond accurately to the total effective RMS value regardless of the waveform Distorted waveforms with the presence of DC...

Page 6: ...and indicating signal spikes during adjustments Analog bar graph is not available in AC DC True RMS Voltage Current modes 4 OPERATION AC Voltage DC Voltage DC AC Voltage Hz Line Level Frequency In AC Voltage press SELECT button momentarily to toggle between AC and dBm In DC Voltage press SELECT button momentarily to toggle between DC and DC AC In mV Voltage press SELECT button momentarily to selec...

Page 7: ... measure the signal voltage or current level then activate the Hz function in that voltage or current range to automatically get the most appropriate trigger level When activated from voltage function you can also press the RANGE button momentarily to select another trigger level range manually The analog bargraph pointer will point at the selected trigger level range scale 1 2 3 or 4 If the Hz re...

Page 8: ... input sensitivity to measure digital type electronic signals T1 T2 Dual Channels Temperature function AM 160 only Press SELECT button momentarily to toggle between C and F readings and the new setting will be saved automatically in the non volatile memory as power up default Press T1 T2 RANGE button momentarily to select T1 T2 or T1 T2 readings Note Insert the banana plug K type temperature bead ...

Page 9: ...toggle between Ω and Continuity functions The new setting will be saved automatically to the non volatile memory as power up default Continuity function is convenient for checking wiring connections and operation of switches A continuous beep tone indicates a complete wire ...

Page 10: ...le memory as power up default CAUTION Discharge capacitors before making any measurement Large value capacitors should be discharged through an appropriate resistance load Note Normal forward voltage drop forward biased for a good silicon diode is between 0 400V to 0 900V A reading higher than that indicates a leaky diode defective A zero reading indicates a shorted diode defective An OL indicates...

Page 11: ...ns The analog bar graph remains the mA current value to alert the user Warning When measuring a 3 phase system special attention should be taken to the phase to phase voltage which is significantly higher than the phase to earth voltage To avoid exceeding the voltage rating of the protection fuse s accidentally always consider the phase to phase voltage as the working voltage for the protection fu...

Page 12: ...capture mode Auto Power Off feature will be disabled automatically in this mode Relative Zero mode Relative Zero allows the user to offset the meter consecutive measurements with the displaying reading as the reference value Practically MAX MIN recording feature readings can also be set as relative reference value Press the button momentarily to activate and to exit Relative Zero mode 500000 high ...

Page 13: ...n when the meter is not in use Disabling Auto Power Off Press the RANGE button while turning the meter on to disable the Auto Power Off APO feature 5 MAINTENANCE 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 equivale...

Page 14: ...t has a Time Current Characteristic Curves projection of approaching infinity at 0 5A It can also be loaded way beyond 1000 seconds at 1A and has a fast acting characteristic of below 0 01 second at beyond 2 5A This protection characteristic also matches our meter nicely Battery replacement Loosen the 2 screws from the battery access door of the case bottom Lift the battery access door and thus th...

Page 15: ...le 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 1010 1 92 to CAT III 1000V AM 140 Terminals to COM ratings V Category III 1000 Volts AC DC and Category IV 600 Volts AC DC A mAµA Category III and Category IV 500 Volts AC and 300 Volts DC AM 160 Terminals to COM ratings V A Category III 1000 Volts AC DC and ...

Page 16: ...pecial Features Record MAX MIN MAX MIN readings Crest Instantaneous Peak hold MAX MIN MAX MIN readings Relative zero mode 500 000 counts high resolution stable reading mode Backlighted display dBm readings T1 T2 differential temperature readings AM 160 only 4 20mA loop current readings High noise rejection filtered Line Level Frequency mode Data Hold Audible visible input warning Electrical Specif...

Page 17: ...80d From 5 to 10 of range accuracy of reading or in dB 180d From 10 to 15 of range accuracy of reading or in dB 100d CMRR 90dB DC to 60Hz Rs 1kΩ Input Impedance 10MΩ 30pF nominal 80pF nominal for 500mV range Residual reading less than 50 digits with test leads shorted dBM At 600Ω 11 76dBm to 54 25dBm Accuracy 0 25dB 2d 40Hz 20kHz Input Impedance 10MΩ 30pF nominal Selectable reference impedance of ...

Page 18: ...for 30 second max with 5 minutes cool down interval AC AC DC CURRENT AM 160 AM 140 RANGE Accuracy Burden 50Hz 60Hz 500 00µA 0 15mV µA 5000 0µA 0 15mV µA 50 000mA 3 3mV mA 500 00mA 3 3mV mA 5 0000A 0 03V A 10 000A 0 5 50d 1 0 40d 0 03V A 40Hz 1kHz 500 00µA 0 15mV µA 5000 0µA 0 15mV µA 50 000mA 3 3mV mA 500 00mA 3 3mV mA 5 0000A 0 03V A 10 000A 0 7 50d 1 0 40d 0 03V A 1kHz 10kHz 500 00µA 0 15mV µA 5...

Page 19: ...ocouple range accuracy not included Hz Line Level Frequency RANGE Accuracy 5 0000Hz 200 000kHz 0 002 4d Sensitivities Sine RMS 0 1V min 500mV range 1V min 5V range 10V min 50V range 100V min 500V range 900V min 1000V range Hz Logic Level Frequency RANGE Accuracy 5 0000Hz 2 00000MHz 0 002 4d Sensitivity 2 5Vp square wave DUTY CYCLE RANGE Accuracy 0 1 99 99 3d kHz 2d Input Frequency 5Hz 500 kHz 5V L...

Page 20: ...n tampered with or taken apart Should your instrument fail due to defective materials and or workmanship during this one year period a no charge repair or replacement will be made to the original purchaser Please have your dated bill of sale which must identify the instrument model number and serial number and call the number listed below Repair Department ATP Amprobe TIF Promax Miramar FL Phone 9...

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