1623-2
Users Manual
10
Description of Functions
The functions are selected with the central rotary switch. Measurement values are shown
on a liquid crystal display with correct decimal point and unit. Additional special
characters indicate measurement mode, operating condition, and error messages.
The Tester includes these measurement functions:
• Earthing Resistance (R
E
) The earthing resistance is determined by a 3-pole or
4-pole current and voltage measurement. The
measuring voltage is a square pulse ac voltage with
48 / 20 V and a frequency of 94, 105, 111 or 128 Hz.
The frequency can be selected manually or
automatically (AFC).
• Selective Measurement of
Earthing (R
E
)
Measurement of a single earth electrode in a mesh
operated (parallel) earthing system. The current flowing
through the single earth electrode is measured with an
external current transformer.
• Low Battery Indicator Battery voltage is low, replace batteries.
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