- 18 Features
- Measures AC/DC voltage up to 1000V, current, resistance, frequency, capacitance and temperature
- Auto and manual ranging
- Auto power off
- Data hold
- Backlight display
- Large, easy to read
- LCD display
- Audible continuity
- Diode test
The Amprobe AM-270 is a commercial, true-rms multimeter for electrical and HVAC applications and is dedicated to 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 Amprobe AM270 true-rms multimeter measures complete range of electrical parameters including voltage, current, resistance and frequency. The AM270 features audible continuity, diode test, auto and manual ranging, data hold, and had a large, easy to read backlight LCD display. The AM-270 also covers HVAC application with temperature, capacitance and micro amps functions. True-rms sensing for superior accuracy.
Why you need a True-RMS Reading Multimeter
True-RMS instruments are accurate on any AC waveform. There are two basic AC measuring systems. One is "average sensing, RMS indicating." This is the most common system because it is affordable and easy to manufacture. An instrument with this type of measuring system measures the average of a sine wave, and then multiplies it by 1.112, allowing the instrument to indicate RMS. This measuring system is only accurate on sine waves.
The second measuring method is called "RMS Sensing, RMS Indicating." An instrument with this type of measuring system computes the RMS value of the measured waveform (sine or otherwise). This is referred to as "True-RMS" reading. This measuring system is accurate for any waveform. When an average sensing instrument is used on a non-sinusoidal waveform, measurement accuracy could be off as much as 50%. Since you may not know what type of AC waveform you are measuring, a True-RMS instrument should be used whenever possible.
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