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“It should be impressed on all personnel that a lethal potential can exist between the station ground and a remote ground if a system fault involving the station ground occurs while tests are being made. Since one of the objects of tests on a station ground is the establishment of the location of an effectively remote point for both current and potential electrodes, the leads to the electrodes must be treated as though a possible potential could exist between these test leads and any point on the station ground...
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Ground Resistance Tester Model 4620 ......Cat. #2130.43 Includes 8 C cell batteries and user manual. Ground Resistance Tester Model 4620 Kit (150 ft) ..Cat. #2135.19 Includes ground tester, two 150 ft color-coded leads on spools (red/blue), one 30 ft...
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Test Kit for 3-Point Testing (150 ft) ........Cat. #2135.35 Includes two 150 ft color-coded leads on spools (red/blue), one 30 ft lead (green), two T-shaped auxiliary ground electrodes, set of 5 spaded lugs, one 100 ft AEMC ® tape measure and carrying bag. Test Kit for 4-Point Testing (300 ft) ........
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Measurement Range: Operating Frequency: Max. Auxiliary Rod Resistance: Response Time: Interference: 45 to 55%, battery power at 9.5V, auxiliary resistance at the measurement terminals = 0, no Voltage Detection Range: Frequency: Voltage Withstanding: Fuse Protection: 1.800.561.8187 information@itm.com www. .com...
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Model 4620 Power Source: Battery Life: Low Battery Indicator: Model 4630 Power Source: Battery Life: Battery Charging: Low Battery Indicator: Connection: Display: Dimensions: Weight: Colors: Mechanical Protection: 1.800.561.8187 information@itm.com www. .com...
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Figure 6 Seasonal variation of earth resistance with an electrode of 3/4" pipe in rather stony clay soil. Depth of electrode in earth is 3 ft for Curve 1, and 10 ft for Curve 2. Table 4 1.800.561.8187 information@itm.com www. .com...
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Table 5 *Such as copper sulfate, sodium carbonate and others. Salts must be EPA or local ordinance approved prior to use. 1.800.561.8187 information@itm.com www. .com...
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® ® “How low in resistance should a ground be?” or less ® Code ® 1.800.561.8187 information@itm.com www. .com...
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® The National Electrical Code ® and NEC ® are registered trademarks of the National Fire Pro- tection Association. resistance R. 1.800.561.8187 information@itm.com www. .com...
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between electrodes are identical. Example: between electrodes. A = distance between electrodes in cm = resistivity in 1.800.561.8187 information@itm.com www. .com...
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Lay out the electrodes in a grid pattern (Figure 20) and connect to the Model 4630 as shown in Figure 19. Proceed as follows: Figure 19 1.800.561.8187 information@itm.com www. .com...
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Figure 20 between 24.1 and 25.9 Figure 21 1.800.561.8187 information@itm.com www. .com...
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To open the internal unit: ment. To free the display board from the cover: To free the power supply board from the bottom of the body: 1.800.561.8187 information@itm.com www. .com...
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To achieve maximum charge capacity: 1.800.561.8187 information@itm.com www. .com...
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is blown. 1.800.561.8187 information@itm.com www. .com...
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For instrument repair and calibration: Ship To: 1.800.561.8187 information@itm.com www. .com...
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® ® Please print the online Warranty Coverage Information for your records. What AEMC Instruments will do: ® ® What you must do to return an Instrument for Warranty Repair: 1.800.561.8187 information@itm.com www. .com...
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