Data Sheet
AM-270
TRMS Industrial Multimeter
A commercial - industrial multimeter for Electrical and HVAC
applications dedicated for electrical and HVAC professionals.
Safety rated to CAT IV 600V and CAT III 1000V for outdoor and
indoor applications requiring direct connection to main panel of
the building or measurement of the outdoor wiring connecting
building the utility transformer. The AM-270 measures complete
range of electrical parameters including voltage, current,
resistance and frequency. It also covers HVAC application with
temperature, capacitance and micro amps functions. TRMS
sensing for superior accuracy.
18 Features
True RMS (TRMS)
Measures AC/DC voltage up to 1000V, Current, Resistance,
Frequency, Capacitance and Temperature
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charges.
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and customer service
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Tool requires warranty
service, any of our
local dealers are
authorized to replace
it, on the spot.
(note: $500 MSLP limit)
Auto and manual ranging
Auto power off
Data hold
Backlight display
Large, easy to read LCD display
Diode Test
Audible continuity
Safety CAT III 600V
Amprobe® Test Tools
AM-270 TRMS Industrial Multimeter
Data Sheet
General Specifications
Display -4/5 digits 5000 counts LCD display
Update Rate Digital Data 5 per second nominal;52 Segments Bar-graph 60 per second nominal
Operating Temperature 0°C to 45°C (32F-113F)
Relative Humidity Maximum relative humidity 80% for temperature up to 31°C decreasing linearly to 50% relative
humidity at 45°C
Altitude Operating below 2000m
Storage Temperature -20ºC ~ 60ºC (-4F to 140F) , < 80% R.H. (with battery removed)
Temperature Coefficient nominal 0.15 x (specified accuracy)/ºC @(0ºC -18ºC or 28ºC -45ºC), or otherwise specified
Pollution Degree 2
Safety The meter (all versions) is protected, against the users, by double insulation per EN61010-1 and
IEC61010-1 2nd Edition (2001) to CAT III 1000V & CAT IV 600V. The meter (all versions) also meet
CSA C22.2 No. 1010-1-92* to CAT III 1000V.
AM-120 & AM-130 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.
E.M.C. Meets EN61326(1997, 1998/A1), EN61000-4-2(1995) and EN61000-4 -3(1996). Also meets former stan
dards 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 above 3V/m is not specified
Power Supply Single standard 9V battery NEDA1604, JIS006P or IEC6F22
Power Consumption 4.3 mA typical
Low Battery Below approx. 7V
APO Timing Idle for 17 minutes
Dimension L317.5 x W177.8 x H76.2mm (12.5 x 7 x 3in) with clamshell
Weight 689.46g (1.52lb) with clamshell
Special Features Data-Hold; Range-Hold; Backlighted Display; Optional PC-interface capabilities
50ms Record MAX-MIN readings at fast 20/second measurement mode; 5ms Crest (Instantaneous
Peak-Hold) MAX-MIN readings; Relative-Zero offset mode; Zoom 5x analog pointer at 60/s
Accessories Test leads (pair); Battery (installed); User’s manual; banana plug K type thermocouple
Optional PC-interface Capabilities 50ms Record MAX-MIN readings at fast 20/second measurement mode; 5ms Crest (Instantaneous
Peak-Hold) MAX-MIN readings; Relative-Zero offset mode; Zoom 5x analog pointer at 60/s
Amprobe® Test Tools
AM-270 TRMS Industrial Multimeter
Data Sheet
Electrical Specification
AAccuracy is +/-(% reading digits + number of least significant digits) or otherwise specified, at 23°C +/- 5°C & less than 75% R.H. True
RMS models ACV & ACA accuracies are specified from 5 % to 100 % of range or otherwise specified. Maximum Crest Factor <3:1 at full
scale & <6:1 at half scale, and with frequency spectrums, besides fundamentals, fall within the meter specified AC bandwidth for nonsinusoidal waveforms.
Range Accuracy
50.00 mV 0.12% + 2d
500.0 mV 0.06% + 2d
5.000V,50.00V,500.0V,1000V 0.08% + 2d
DC Voltage 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 Accuracy*
50Hz -- 60Hz
50.00mV, 500.0mV, 5.000V, 0.5% + 3d
50.00V, 500.0V, 1000V
40Hz - - 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, 50.00V, 500.0V 3dB*
1000V Unspec’d
*Specified from 30% to 100% of range
CMRR : >60dB @ DC to 60Hz, Rs=1kΩ
Input Impedance : 10MΩ, 16pF nominal (44pF nominal for 50mV & 500mV ranges)
Temperature Range Accuracy*
-50 ºC TO 1000 ºC 0.3% + 3d
-58 ºF TO 1832 ºF 0.3% + 5d
*Thermocouple range & accuracy not included
DC Current Range Accuracy Burden Voltage
500.0µA 0.2%+4d 0.15mV/µA
5000µA 0.15mV/µA
50.00mA 3.3mV/mA
500.0mA 3.3mV/mA
5.000A 0.03V/A
10.00A* 0.03V/A
*10A continuous, 20A for 30 second max with 5 minutes cool down interval
AC Current Range Accuracy Burden Voltage
50Hz -- 60Hz 500.0µA 0.15mV/µA
5000µA 0.6%+3d 0.15mV/µA
50.00mA 3.3mV/mA
500.0mA 1.0%+3d 3.3mV/mA
5.000A 0.6%+3d 0.03V/A
10.00A* 0.03V/A
Amprobe® Test Tools
AM-270 TRMS Industrial Multimeter
440Hz --1kHz Range Accuracy Burden Voltage
500.0µA 0.8%+4d 0.15mV/µA
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 0.8%+4d 0.03V/A
10.00A* 0.8%+4d 0.03V/A
*10A continuous, 20A for 30 seconds max with 5 minutes cool down interval
Crest mode for V & A functions
Accuracy: Specified accuracy ±150 digits for changes > 5 ms in duration
Ohms Range Accuracy
50.00Ω 0.2% + 6d
500.0Ω 0.1% + 3d
5.000kΩ, 50.00kΩ, 500.0kΩ 0.1% + 2d
5.000MΩ 0.4% + 3d
50.00MΩ 1.5% + 5d
Open Circuit Voltage < 1.3VDC (< 3VDC for 50Ω & 500Ω ranges)
Audible Continuity Tester
Audible Threshold : between 20Ω and 200Ω. Fast response time < 100µs
Diode Tester Range Accuracy Test Current (Typical) Open Circuit Voltage
2.000V 1%+1d 0.8mA < 3.5 VDC
Frequency Function Ensitivity (Sine RMS) Range
Accuracy: 0.01% + 2d mV 300mV 6Hz - 125kHz
5V 2V 6Hz - 125kHz
50V 20V 6Hz - 20kHz
500V 80V 6Hz - 1kHz
1000V 300V 6Hz - 1kHz
Ω, Cx, diode 300mV 6Hz - 125kHz
µA, mA, A 10% F.S. 6Hz - 125kHz
Data Sheet
Capacitance Range Accuracy*
50.00nF 0.8% + 3d
500.0nF 0.8% + 3d
5.000µF 1.0% + 3d
50.00µF 2.0% + 3d
500.0µF 3.5% + 5d
9999µF 5.0% + 5d
*Accuracies with film capacitor or better
Amprobe® Test Tools
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6/2010 AM-270_ DS Rev A
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