The 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 adjustments are not
necessary.
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