![](/html/5b/5b17/5b17dcd7630fd6b0becc43302cea0d291651a8fa1a12388e7a40660e5f6e0011/bg1.png)
Insulation Tester/Multimeter
With Wireless PC Interface
HHM-MG300
U Wireless USB Interface
Transmits Measurement
Data to a PC
U Backlit Super Large
Triple Display
U 125V, 250V, 500V, and
1000V Test Voltages
U Insulation Resistance from
0.001 to 4000M Ω
U Auto Discharge of
Capacitive Voltage
U Lock Power on Function
for Hands-Free Operation
U Data Hold to Freeze
Displayed Reading
U Min/Max and Relative Mode
U Auto Power Off
U Waterproof (IP67) Rugged
Double-Molded Design
The HHM-MG300 combines a
1000V insulation tester with a fullfeatured true RMS multimeter in
a single, compact instrument. The
HHM-MG300 wireless frequency
(914 MHz) is suitable for use in
US, Canada and Mexico. It is an
ideal instrument that can be used
in testing insulation of electric
machines, measure the insulation
resistance of transformer windings,
cables, electronic equipments,
electric facilities, and more.
Continuous data streaming to your PC in real time!
Q
HHM-MG300
shown actual size.
Q-1
![](/html/5b/5b17/5b17dcd7630fd6b0becc43302cea0d291651a8fa1a12388e7a40660e5f6e0011/bg2.png)
Measure the insulation resistance of transformer windings Only a True RMS meter can give accurate
readings of distorted waveforms.
Specifications
Insulation Tester Range Resolution Accuracy
Insulation Resistance
400M Ω, 4000M Ω
Insulation Test Voltages
500V, 1000V
4M Ω, 40M Ω,
125V, 250V,
0.001M Ω ±3%
— —
Multimeter
AC Voltage 1000V 0.1 mV ±1%
DC Voltage 1000V 0.01 mV ±0.06%
AC Current 10A 0.1 μA ±1.5%
DC Current 10A 0.01 μA ±1.0%
Resistance 40M Ω 0.01 Ω ±0.3%
Capacitance 40 mF 0.001 nF ±3.5%
Frequency 100 MHZ 0.001 HZ ±0.1%
Duty Cycle 0.1 to 99.9% 0.01 ±1.2%
Temperature -50 to 1200°C (-58 to 2192°F) 0.1°C (0.1°F) ±1% + 2.5°C (±1% + 4.5°F)
4-20mA% -25 to 125% 0.01% —
Continuity/Diode Yes — —
Power Source
Dimensions
6 x “AA” batteries (included)
200 x 92 x 50 mm
(7.8 x 3.6 x 1.9")
— —
— —
Weight 582 g (20.5 oz) — —
To Order Visit omega.com/hhm-mg300 for Pricing and Details
Model No. Description
HHM-MG300 Insulation tester/true RMS multimeter with wireless PC interface (915 MHz)
Comes complete with remote receiver with USB cable, Windows® compatible software, test leads with alligator clips, Type K bead wire
temperature probe with adaptor, carrying case, 6 x “AA” batteries and operator’s manual.
Ordering Example: HHM-MG3000, insulation tester/true RMS multimeter with wireless PC interface (915 MHz).
Q-2