323511 EARTH TESTERS
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
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Specifications - 323511 Earth Testers
| Measuring Range (Earth Resistance) | 0 to 1,000 Ω (Min. Scale Div. 0.1 Ω) |
| 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 |
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Features - 323511 Earth Testers
Two earth etoctrodes are used in addition to the system earth under test. Test electrode resistance is not critical, up to 10 kΩ is tolerable.
YOKOGAWA's technology has produced a potentiometer with accurate, wide-range logarithmic scale to eliminate the necessity for range changeover. Accuracy is better than 5% from 2 to 1/1000Ω, and maximum resolution is 0.1Ω
The bridge uses a transistorized 500 Wt invertor and synchronous detector, so is not affected by DC or 50/60 Hz earth voltages of normally operating equipment. (An AC voltmeter mode is provided to check earth voltage)
Accessories
B9646CG Auxiliary Earthing Net
(2 pcs./unit. order qty 1 unit)
The auxiliary earthing nets are used to improve the earthing conditions of the earth spikes. For example, on soft ground such as hard places such as concrete, etc. where the spikes cannot be driven.
However, please note that the earth resistance cannot be measured if the water does not permeate into the place such as newly paved road, a heavy thick intermediate on the earth, etc.
322710 Test Box for Model 3226
A switch box to facilitate the measurement of leakage currents. A simple switch operation reverses the polarity of the voltage applied to the appliance being tested by the Type 3226.
