CATEGORY Ground Resistance Testers 3-4 Pole MAIN MENU ....................................... |
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Catalog:Ground Resistance Testers 3-4 Pole 
Biddle Three-Terminal Ground Resistance Tester Cat-250260/1 Description Click here to view full-pdf specification sheets Simple to operate For quick, routine single-electrode tests Direct readout in ohms The Biddle Three-Terminal Ground Resistance Tester is the economical choice for electrical contractors, plant electricians, telephone and CATV technicians making routine ground resistance tests on single electrodes and other simple grounding systems. The instrument is easy to use for quick measurement of resistances from 0.5 to 500 ohms. Because factors such as seasonal variations in temperature, moisture and salt content affect soil resistivity, periodic tests are essential to ensure that resistance to ground remains at a safe value. The instrument is simple to operate: Drive probes and hook up the leads. Push switch to READ and ground resistance is displayed directly. If reading is questionable, switch to CHECK to verify test lead continuity and probe resistance. Designed for simplicity of use, the instrument is operated by a single three-position switch to read the measurement, check the probe resistance and turn the instrument off. Measurements are displayed directly in ohms; range changing, multipliers or calibration ad- justments are not necessary. Applications The instrument can be used to make the usual fall-of-potential ground resis-tance measurements. Two models are available, one for testing in the vicinity of 60-Hertz power systems; the other near 50-Hertz systems. Applications include testing grounds of: Utility poles Distribution transformers Residential wiring systems Lightning arresters Computer grounds Machinery safety grounds Features Measures ground resistance down to 0.5 ohm Reads directly in ohms on a single range scale Stable calibration requires no field adjustments Checks probe resistance and battery condition Powered by replaceable C cells Limits output to 50 volts open circuit, 5 mA short circuit Weighs less than 3 lb (1.5 kg) Specifications Please see pdf. for more detailed specifications Input Power Source: Four C alkaline batteries Output Test Frequency Cat. No. 250260: 135 Hz Cat. No. 250261: 121.6 Hz Maximum Output Voltage: 50 V Maximum Test Current: 5 mA Accuracy 1 to 100 W: ±2% of full-scale deflection 500 W: ±4% of full-scale deflection Range 0.5 to 500 W Interference 2 V peak to peak Dimensions 7.5 H x 6.5 W x 4.75 D in. 190 H x 165 W x 120 D mm Weight 2.8 lb (1.3 kg) Ordering Details Three-Terminal Ground Resistance Tester 60 Hz ....................................................................... 250260 50 Hz ....................................................................... 250261 Included Accessories Test record cards ...................................................... 250942 Batteries, C cells (4) ................................................... 19111 Getting Down to Earth manual ......................... AVTM25-TA Instruction manual ............................................. AVTM25-J4 Optional Accessories Accessory kit Includes three color-coded test leads, 12, 31 and 50 ft [3.6, 9.4 and 15 m] (1 set); ground rods, 11 in. [250 mm] (1 pr); and a calibration standard ..250560 Test leads, color-coded, 12, 31 and 50 ft [3.6, 9.4 and 15 m] (1 set) .. 250574 Ground rods 11 in. [250 mm] (1 pr) ..250584 20 in. [510 mm] (1 pr) ..250580 30 in. [760 mm] (1 pr) ..250582 Field calibrator ..10245 Canvas case for leads and rods only .. 250578 Instrument case ......................................................... 217719 Instrument and accessory case ............................... 250855 Click here to purchase accessories Please call 1800 783 6664 for any items not listed Model Three-Terminal Ground Resistance Tester 60 Hz ..250260 50 Hz ..250261 Please order from the menu below
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