The Model 323511 Earth Tester is a convenient test set to facilitate very easy, accurate measurements of earth resistance. Without a hand-driven generator, this instrument consists of a battery-operated silicon-transistorized DC-AC inverter, an AC potentiometer measuring dial and a galvanometer. Just push the pushbutton switch and move the dial so that the galvanometer shows balanced condition Then, resistance is directly read on the dial scale. A wide range of earth resonance of 0 to 1,000 Ω can be measured by a single measuring dial without range changeover. Furthermore, earth voltage can also be measured on the galvanometer scale by positioning the selector switch.
Earth Ground Resistance Tester, 3 Pole, with Carrying Case
Measuring Range (Earth Resistance) | 0 to 1,000 Ω (Min. Scale Div. 0.1 Ω) |
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Measuring Range (Earth Voltage) | 0 to 30 V |
Scale (Earth Resistance) | 3-dign logarithmic continuous scale on measuring dial |
Scale (Earth Voltage) | Uniform state on galvanometer |
Accuracy (Earth resistance) | ±2.5% of 20 Ω (±0.5 Ω or min. one div) in the range of 2 to 20 Ω ±2.5% of 200 Ω(±5% or min. one div.) in the range of 20 to 200 Ω ±5% of 2 Ω (±0,1 Ω or min. one div.) in the range of 0 to 2 Ω 5% of 1,000 Ω (±50 A or min. one div.) .in the range of 200 to 1,000Ω |
Accuracy (Earth Voltage) | plusmn;5% of full scale value |
Measuring Frequency | 500 Hz |
Ambient Temperature Influence | Variation in indication Is within the corresponding one scale division for temperature charge by 20 ± 20°C. |
Battery Voltage Influence | The accuracy is maintained within the specified limit even if the voltage decreases dawn to approx. 4 V under operating condition. |
Earth Voltage Influence | Variation in Indication is within the corresponding one scale division for the earth voltages of up to 10V at commercial frequency. |
Power Source | Four 1.5 V batteries (JIS SUM-1, ANSI D, Mono 1.5 V or equivalent) |
Insulation Resistance | More than 100MΩ at 1,000V DC between electrical circuit and case |
Dimensions | Approx. 122 x 190 x 124 mm (4 7/8 x 7 1/2 x 4 7/8") not including accessories. |
Weight | Approx. 1.5 kg (3.3 lbs) for Instrument only. Approx. 3.5 kg (7.7 lbs) including all accessories |
Accessories1 | Accessory storage bag - 1 pcs. (cloth-made knapsack) Carrying case - 1 pcs. (Shoulder bag type) Earth spikes - 2 pcs. (one each for potential and current) Measurement leads (yellow 10 m or 11 yd for potential) 3pcs. Measurement leads (green 5 m or 5.5 yd for earth plate) 3 pcs. Measurement leads (red 20 m or 22 yd for current) 3 pcs. |
Optional Accessories | B9646CG Auxiliary earthing net |
1 Accessories Supplied at No Extra Cost