ZC29B-2 Ground Resistance Tester

ZC29B-2 ground shake table, ZC29B-2 Ground Resistance Tester ZC29B-2 Ground Resistance Tester Uses: ZC29B-2 type Ground Resistance Tester **** measure various grounding power systems, electrical equipment, lightning rod grounding devices resistance. It can measure the resistance of the low resistance conductor; also measuring soil resistivity. ZC29B-2 Ground Resistance Tester specifications and performance: ZC29B ground resistance tester 1 Specifications Model Range Minimum Scale Auxiliary probe grounding resistance type ZC29B-1 0 ~ 10Ω 0.1Ω ≤1000Ω 0 ~ 100Ω 1Ω ≤2000Ω 0 ~ 1000Ω 10Ω ≤5000Ω ZC29B-2 type 0 ~ 1Ω 0.01Ω ≤500Ω 0 ~ 10Ω 0.1Ω ≤1000Ω 0 ~ 100Ω 1Ω ≤2000Ω 2. Operating temperature: -20 ℃ to + 50 ℃ 3. Relative Humidity: 85% (+ 25 ℃) 4. Accuracy: 30% of the nominal rated below ± 1.5%, more than 30% of rating to the rating of ± 5% indicated value. 5. Shake the speed: 150 revolutions per minute. 6. tilt effect: in either direction is inclined 10 °, indicating the value does not change beyond accuracy. 7. Temperature effect: when the ambient temperature to standard temperature changes by ± 10 ℃, change the instrument indicated value does not exceed ± 1.2% of the external magnetic field affect 8: When the external magnetic field intensity of 5 Oe, change the instrument indicated value does not exceed ± 2.5% 9. Insulation resistance: at room temperature, relative humidity less than 85%, no less than 20MΩ. 10. Dielectric Strength: Insulation between the line and the shell can withstand 50 Hz sine wave AC voltage 0.5KV lasted one minute. 11. (1) Continuous Shock Test: Acceleration: 10 ± 1g; corresponding pulse duration: 11 ± 2ms; pulse repetition frequency: 60 to 100 beats / min; continuous impact frequency: 1000 ± 10 times; pulse waveform: approximately half sine wave; Test time: no damage after 3 to 10 minutes. (2) Drop test: 250mm height of the free fall four times, no damage. 12. Dimensions: approximately 172 × 116 × 135 mm. 13. Weight: about 2.4 kg. ZC29B-2 Ground Resistance Tester structure and working principle: ZC29B-2 Ground Resistance Tester structure: ZC29B-2 Ground Resistance Tester by a hand-cranked generator, current transformers, slide resistance and galvanometer and other components. All bodies packed in plastic case, easy to carry outside the hull. Accessory wires and other auxiliary probe, installed in the annex bag. ZC29B-2 Ground Resistance Tester works: two E terminals when the generator crank 150 rpm rotational speed, resulting in 105 to 115 weeks of alternating current, the tester through 5 m wires to the measured object, P and C-terminal side button button connected to the corresponding two auxiliary probe. After starting the generator current I1 current probe C'R5 to earth, analyte and the current transformer primary winding back CT generator, producing I2 via potentiometer RS ??by the current transformer secondary winding induction, with the adjustment potentiometer RS galvanometer can reach zero. Therefore, the full scale of 10 in the dial reading when N: K = CT current transformer current ratio ZC29B-1 K = 4 ZC29B-2 K = 1/4 so RX is the measured ground resistance values. ZC29B-2 Ground Resistance Tester Description: wiring the earth resistance measurements, ZC29B-2 specific steps are as follows: 1. The measured along the ground electrode (wire) E 'the potential of the probe P' and the current probe C ' straight-line distance of 20 meters from each other, and the potential probe P 'department at E' between and C '. 2. E side button then 5 meters wire, P side button then 20 m wire, C side button then 40 m wire. 3. Place the instrument level and then check the galvanometer points to zero, or can be zero alignment adjustment zero. 4. "magnification scale" at the maximum rate, the generator crank slowly shaking his left hand while rotating the potentiometer dial galvanometer pointer to "0." 5. When the galvanometer pointer close to balance (a small swing) is to accelerate the speed of the generator cranks to 150 revolutions per minute. Then turn potentiometer dial galvanometer balance (pointer to "0"), then the potentiometer dial reading multiplied by the rate (speed) is the value measured grounding resistance. 6. When the dial reading is less than 1, it should switch to a smaller magnification ratio, readjust the dial to get the correct reading. 7. When the measurement is less than the grounding resistance 1Ω and shall end E and E 'between the open ends of the gusset, respectively, with two conductors (E terminal connected to the ground line is grounded object, E' end to close to the ground line grounding) to eliminate additional errors coupled wire resistance measurements, the steps above. 8. When the galvanometer sensitivity is too high, the probe may be two roots into the soil lighter, when the galvanometer sensitivity is too low, the probe along the water to make it moist. ZC29B-2 Ground Resistance Tester Notes: 1. disabled when there is lightning or charged analyte measurement. 2. measure, to clear the ground line of paint and rust, reduce contact resistance E-E 'end of the line. 3. Measure the instruments should be put smooth, not shake the instrument to make the galvanometer pointer smooth point "0." 4. ZC29B-2 meter transport shall be handled with care to avoid severe shock move.