323511 Earth Ground Resistance Tester, 3 Pole, with Carrying Case
Manufacture: Yokogawa Product Description: The Yokogawa 3235 Earth Tester is used as a convenient test set for simple, accurate measurements of earth resistance. Without a hand-driven Generator, this instrument consists of battery-operated silicon-transistorized DC-AC inverter, An AC potentiometer measuring dial, and a galvanometer. Just push the push-button switch and move the dial so that the galvanometer shows balanced conditions. Then the resistance is directly read on the dial scale. A Wide range of earth resistance of 0 to 1k Ohms can be measured by a single measuring Dial without range changeover. The earth voltage can also be measured on the galvanometer scale by positioning the selector switch.
Three Input Resistances Ranges - up to 1k Ohms
Accurate, Wide Range Logarithmic Scale
+-5% Accuracy From 2 to 1,000 Ohms
Maximum resolution is 0.1 Ohms
AC potentiometer Bridge, synchronous detector
Portable and shockproof
Specifications:
Measuring Range (Earth Resistance) 0 to 1,000 Ohms (Min. Scale Div. 0.1 Ohms)
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 Ohms (+-0.5 Ohms or min. one div) in the range of 2 to 20 Ohms +-2.5% of 200 Ohms(+-5% or min. one div.) in the range of 20 to 200 Ohms +-5% of 2 Ohms(+-0,1 Ohms or min. one div.) in the range of 0 to 2 Ohms 5% of 1,000 Ohms(+-50 A or min. one div.) .in the range of 200 to 1,000 Ohms
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 degrees 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 100M Ohms 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
 "323511 Earth Ground Resistance Tester, 3 Pole, with Carrying Case")