AEMC 4500 Ground Resistance Tester
- Description
Description
The Digital Ground Resistance Tester Model 4500 is a rugged, easy-touse tester which is specifically designed for measuring very low resistance
on large grounding systems (ground grids, ground mats), even under difficult conditions such as high stray currents or excessive auxiliary electrode
resistance.
This high performance instrument is capable of measuring up to 20kΩ,
and direct reading with a resolution of 1 milliohm is possible. The extra
large 3½ digit LCD display minimizes the possibility of operator reading
error, and dual indicators (blinking display and arrow) warn the operator
when excess stray current or auxiliary electrode resistance is present, or
when there is a lack of continuity between leads and electrodes. A beeper
notifies the user if a voltage greater than 20V peak is present between the
terminals X and Y or X and Z when the ground leads are connected.
The Model 4500 can be used to perform soil resistivity measurements with
the four-point method by using the high 20kΩ range and is designed in a
sturdy, dust and water-resistant carrying case with a detachable cover.
Key Specifications & Features
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Test current ranges: selectable 2 mA, 10 mA and 50 mA.
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Resistance measurement ranges (selectable): 2 Ω, 20 Ω, 200 Ω, 2000 Ω, 20 kΩ; resolution as low as 1 mΩ on the lowest range.
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The instrument is designed to reject high levels of interference (stray currents, auxiliary electrode resistance) in field conditions.
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Dual power modes: Internal rechargeable 12 V battery, and also compatible with external 12 V DC supply.
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Rugged, dust/water resistant case suited for field use.
