Omega Products HHM-GRT300 User Manual

4-Wire Earth Ground
Resistance Tester Kit

HHM-GRT300

U 2, 3, and 4-Wire Testing
U Large Dual Line LCD
U Autoranging
U Automatic I (Current) Spike Check
U Automatic P (Potential) Spike Check
U Test Hold Function for Easy Operation
U Automatic Zero Adjustment
U AC Earth Voltage
U Data Hold and Auto Power Off
U Overrange and Low Battery Indication

The HHM-GRT300 4-wire earth resistance tester
has been designed and tested according to the
IEC Publication 348, safety requirements for
Electronic Measuring Apparatus,
EN 61010-1, EN 61326-1,
EN 61557-1, EN 61557-5 and
other safety standards.

SPECIFICATIONS

Measuring Ranges Earth Resistance:

0 to 2Ω, 0 to 20Ω, 0 to 200Ω, 0 to 2 KΩ

Earth Voltage: 0 to 300 Vac (40 to 500 Hz)
Accuracy Earth Resistance: ±(2% rdg + 3 dgt)
Earth Voltage: ±(2% rdg + 3 dgt)
Earth Resistance/Resolution:

0 to 2 Ω/0.01 Ω
0 to 20 Ω/0.1 Ω
0 to 200 Ω/1 Ω
0 to 2 KΩ/0.01 KΩ

Test Frequency: 820 Hz
Test Current: 2mA
Temperature and Humidity
Operating: 0 to 50°C (32 to 122°F)

80% relative humidity

Storage: -10 to 60°C (14 to 140°F)

80% relative humidity

Power Source: 1.5V “AA” x 8 (included)
Dimensions: 250 L x 190 W x 110 mm D (9.84 x 7.5 x 4.33")
Weight: Approx. 1430 g (50.44 oz)(battery included)
Fuse: 0.1A/250V 5 x 20 mm

HHM-GRT300 shown smaller than actual size with test
leads and 4 auxilliary earth bars (included).

To Order Visit omega.com/hhm-grt300 for Pricing and Details

Model No. Description
HHM-GRT300 4-wire earth ground resistance tester kit

Comes complete with test leads with alligator clips, 4 auxiliary earth bars, hard carrying case, eight “AA” batteries and operator’s manual.
Ordering Example: HHM-GRT300, 4-wire earth ground resistance tester kit.

Q

Q-1