Amprobe AM-520 HVAC Multimeter

(8 customer reviews)

  • Measures AC/DC voltage up to 600 V, AC/DC current, resistance, frequency, capacitance and temperature
  • CAT III 600 V safety rated
  • Non-contact voltage detection enhances safety
  • Audible continuity quickly identifies shorts and opens
  • Diode test to verify polarity
  • Data hold freezes the reading on the display for further analysis
  • MIN/MAX recording records min/max measurements over time to show voltage fluctuations
  • Relative zero mode displays the difference between the actual reading and a stored reference value and may be used with any function or range
  • Combines user friendly features such as, auto power-off to conserve battery life, low battery warning, a “third hand” test probe holder, built-in test leads storage, a built-in flashlight, and a Velcro strap to hang the meter
  • Auto and manual-ranging delivers maximum flexibility
  • Backlit LCD display with analog bar graph makes it easy to view results
SKU: 4018649 Category:


Designed primarily for HVAC professionals, the AM-520 autoranging digital multimeter offers all the most commonly used HVAC digital multimeter features such as temperature, micro amps to troubleshoot flame sensors, and capacitance to check motor startup capacitors. With its CAT III safety rating, this high voltage multimeter measures a broad range of electrical parameters. The backlit LCD display makes it easy to read, and it’s easy to use with non-contact voltage detection, the “third hand” probe holder, and the built-in flashlight.

AM-500 AM-510 AM-520 AM-530 AM-560 AM-570
Multimeter Type Auto-ranging Com / Res HVAC Electrical Adv. HVAC Industrial
Safety Rating Safety CAT III 600V CAT III 600V CAT III 600V CAT III 600V CAT IV 600V
CAT III 1000
CAT III 1000
Measure voltage in noisy environments True rms
Electrical panels, AC outlets AC Voltage (V) 600 600 600 600 1000 1000
DC systems, auto/marine batteries DC Voltage (V) 600 600 600 600 1000 1000
AC Current – electrical panels, appliances AC Current (A) 10 10 10 10 10 10
DC Current-electronics, DC motors DC Current (A) 10 10 10 10 10 10
Specified resistance and continuity Resistance (MOhms) 20 40 40 40 60 60
Flame sensors Microamps
Diodes in AC to DC converters Diode Test
Fuses, lightbulbs, wire connections Continuity
Household batteries Battery test
Motor startup or run capacitors Capacitance
Frequency verification Frequency
Non-contact voltage test Non-contact voltage
Electrical load-time on vs time off Duty cycle
Temp of air vents, fuses, transformers Temperature inputs 1 1 2 2
Automatically selects measurement range Autoranging
Manually select measurement range Manual ranging
Voltage on variable frequency drives Low pass filter
Detect stray voltages Low Z
Dimly lit areas Built-in flashlight
Meter resolution LCD Counts 2,000 4,000 4,000 4,000 6,000 6,000
Dimly lit areas Backlight
Monitoring fast changing signals Bar graph
Two relative measurements on one screen Dual display
Data memory Data hold
Difference between two measurements Relative reading
Max/min peak measurement Max/min hold
Specialized signal measurements Peak hold (crest)


FEATURE AM-520 Best Accuracy
AC Voltage 400 mV, 4.000 V, 40.00 V,
400.0 V, 600 V
+/- (1.0 % rdg + 3 LSD)
@ 45 Hz to 400 Hz, 4 V to 400 V ranges
DC Voltage 400 mV, 4.000 V, 40.00 V,
400.0 V, 600 V
+/- (0.8% rdg + 1 LSD)
@ 4 V to 400 V ranges
AC Current 400.0 μA, 4000 μA,
40.00 mA, 400.0 mA,
4.000 A, 10.00 A
+/- (1.2% rdg + 3 LSD)
@ 400 μA V to 400 mA ranges
DC Current 400.0 μA, 4000 μA,
40.00 mA, 400.0 mA,
4.000 A, 10.00 A
+/- (1.2% rdg + 3 LSD)
@ 400 μA to 400 mA ranges,
45 Hz to 400 Hz
Frequency 10 Hz to 10 MHz +/- (0.1% rdg + 4 LSD)
@ 400 μA to 400 mA ranges
Resistance 400.0 Ω,
4.000 kΩ, 40.00 kΩ, 400.0 kΩ,
4.000 MΩ, 40.00 MΩ
+/- (1.0% rdg + 2 LSD)
@ 4 kΩ to 400 kΩ ranges
Capacitance 40.00 nF, 400.0 nF,
4.000 μF, 40.00 μF, 400.0 μF, 4000 μF
+/- (3.0% rdg + 5 LSD)
@ 400 nF to 40 μF ranges
Temperature -40 °F to 1832 °F
-40 °C to 1000 °C
+/- (1.8% rdg + 6 °F) @ >32 °F to 212 °F
+/- (1.2% rdg + 3 °C) @ >0 °C to 100 °C
Number of temperature inputs Single Thermocouple



Amprobe AM-500 Series

Learn about the AM-500 Digital Multimeter Series.

What’s Included

  • AM-520
  • 9V(6F22) x1 battery installed
  • Test leads
  • Type-K Probe x 1
  • Velcro strap
  • Carrying case


Datasheet »
Product Manual »

8 reviews for Amprobe AM-520 HVAC Multimeter

  1. hvacserviceinstructor

    Perfect HVAC Multimeter for the Professional and Student Technician

    This HVAC multimeter is now my first choice for a troubleshooting meter. I have been using several types of meters, for my HVAC troubleshooting calls, and now I’ve returned to the Amprobe brand. I have worked in the HVAC / Electrical trade for almost 30 years, as a field technician, and using electrical meters is required in my daily job duties. I am a HVAC / Electrical Service Instructor, at the Union, so buying and using digital multimeters is a very important part of my career and job.

    The price is excellent, the combined functions of this meter are superior to other manufacturers on the market.
    The built in strap bracket on the top of the meter makes it easy to hang with the included Velcro strapping.
    The selection dial is easy to read with clear selection points.
    Display light is clear white and lights up the entire display.
    I found the display easy to understand with large numbers to read in tight locations.
    The LED work light, on the top of the multimeter, is great when you are trying to see into a dark HVAC unit or ceiling.
    I love the capacitance checking capability and the ability to check temperatures with one multimeter.
    The micro-amp setting allows you to test flame sensors for heating troubleshooting calls.
    The non-contact voltage detection is a great feature, and helps you troubleshoot with one meter.

    The non-contact voltage detector does not measure low voltage control voltages below 90V-AC.
    The piercing tips on the test leads don’t pierce the wiring insulation.
    I found the hold button is a little awkward to use on the front of the meter.
    The display light only stays on for 25 seconds, this time a little short for most troubleshooting.
    I would like to have had a Type K thermocouple plug on the front of the meter and not the, large plug, Type K thermocouple adaptor.

    ✔ Yes, I recommend this product.

  2. aica0177


    I love its wonderful and the support and warranty are great

    ✔ Yes, I recommend this product.

  3. zenc

    muy contento con este articulo de vuestra casa

    en relacion calidad y precio creo que es de los mejores si no es ya lo mejor. si lo recomiendo a mis amigos y compañeros , muy buen producto

    ✔ Yes, I recommend this product.

  4. Dawson

    awesome meter

    works awesome and has all the options of a fluke with less then half the price!

    ✔ Yes, I recommend this product.

  5. Patrick413

    Nice features, nice price

    I needed something with more features and reliability than the 20 year old hand-me-down multimeter I was using. I primarily use it for HVAC related work (I am not a licensed professional) and automotive hobby work. The back lit display and flashlight have been handy. I’m pretty happy with it. I bought mine on Amazon.

    ✔ Yes, I recommend this product.

  6. luckyskreet


    Very solid electrical multi meter, tackles projects with ease, has all features one could possibly need or want.

    ✔ Yes, I recommend this product.

  7. Buckeye32141

    Happy with the product and results

    I have used this meter since obtaining it in an HVAC class I took. I use it often in a variety of environments. I am very pleased with the meter.

    ✔ Yes, I recommend this product.

  8. Yambo59

    Good quality and value for the money, some improvements needed

    Ive had the AM520for a few months now and I have mixed feelings. Its a nicely built meter with a good overall quality feel , nice range switch and good looking display, but like so many meters the back light shuts off way too soon – there should be an option in the software to leave it on until manually shut off like some cheaper meters I have. Another issue is the continuity is not near loud or fast enough, also its painfully slow at reading capacitors, its seem to take much longer than most meters and I do discharge the caps first. I like the meter for the most part but feel it should have been better in these areas – for its price point it misses the mark and I dont see why from a company like Amprobe. We went to the moon 50 years ago the technology for these improvements is cheap and it seems to me a multimeter from a company like Amprobe in this price range should not have these flaws in this day and age, especially when some cheaper ones dont.

    ✔ Yes, I recommend this product.

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