Fieldpiece SMG5
Digital Megohm Meter

  • Evaluate Compressor Insulation
  • 1000VDC Voltage Source
  • Backlit LCD
  • 1000VDC stresses insulation to Measure up to 2000MΩ
  • Helps predict compressor failure
  • Auto-off to extend battery life
  • Case, alligator clip, leads with removable tips
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Fieldpiece SMG5 Shown
Product Information
Manual 415 KB PDF
SMG5 Movie
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The Fieldpiece SMG5 Digital Megohm Meter is a compact standalone meter designed for checking HVAC compressor insulation. The Fieldpiece SMG-5 provides a 1000V voltage source, monitors current, and displays the resistance between the test points. Maximum current output is >1mA. The Fieldpiece SMG5 can be used to determine the condition of insulation from winding to ground in a motor, compressor, or transformer.

The Fieldpiece SMG5 Megohm Meter is in a class of it’s own. The Fieldpiece SMG5 affordable and was designed with your safety in mind. When used properly, detachable lead tips and probes along with and alligator lead tip allow for one-handed testing. The compact, slim shape allows for easier testing as well while the Auto power off (APO) helps the user to conserve battery life.

Why a Digital Multimeter (DMM) Often Isn't Enough
To test resistance, a DMM supplies low voltage (>1V) to the test points and is capable of delivering only a few milliamps. It's not a high enough voltage to detect high resistance problems that might indicate moisture and other contaminants and it's not enough current to measure lower values of resistance.

Electrical Specifications
Ranges: 20 ΜΩ, 2000 ΜΩ
Resolution: 10K Ω on 20ΜΩ range, 1 ΜΩ on 2000 ΜΩ range
Accuracy: 20 ΜΩ range: ±(2%rdg + 2dgts)
2000 ΜΩ range: >500ΜΩ ±(4%rdg + 2dgts)
<500 ΜΩ ±(5%rdg + 2dgts)
Rated voltage: DC-DC converter to 1000VDC
Accuracy temperature: 23°C ± 5°C less than 70%RH
Temperature Coefficient: 0.1X (specified accuracy)/°C (28°C)
Physical Specifications
Display: 3 1/2 digit liquid crystal display (LCD) with maximum reading of 1999
Overrange: "OL" or "-OL" mark indication.
Low battery Indicators: Continuity beeper (>100Ω)
Auto power off: 15 seconds approx.
Operating environment: 0 to 40°C at <70% R.H.
Storage Temperature
(with batteries removed):
-20°C to 60°C, 0 to 80% R.H. with battery removed from meter
Standby consume current: <10μA
Battery type: 4 pcs 1.5V (AAA size) UM-4 R03
Battery life: 200 hours typical
Stated accuracies: 74°F ± 8°F (23°C ± 4°C), 75%RH
Ordering Information
Model Description Buy Online Price
SMG5 Fieldpiece SMG5 Digital Megohmmeter - Insulation Resistance Tester,1000V DC Test Voltage, 2 Gohm Buy Now Sale $101.60
(Reg. $127.00)
Included Accessories
  • 2 - Probe tips
  • 1 - Ground lead with detachable tip
  • 1 - Alligator probe tip
  • 1 - Carrying Case
  • 4 - 1.5V AAA batteries (installed)
  • 1 - Operator’s manual