© PCE Instruments
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Device description
1.
Display
2.
„HOLD“ key
3.
Zero adjustment wheel
4.
Backlight key
5.
„TEST“ key
6.
Measuring function selector
7.
V/
Ω/C socket
8.
P socket
9.
COM socket
10.
Holder for carrying strap
11.
Battery compartment cover
5
Operating instructions
Measurement of the effective resistance of earth electrodes
W
arning:
Before you start the measurement, read the safety instructions above.
Note:
Low batteries can falsify the measurement results. Therefore, pay attention
to the battery level and replace the batteries before starting the measurement if
necessary.
1.
Short-circuit the test leads and press the "TEST" key. Use the zero adjustment wheel
to set the value
to 0 Ω.
2.
Move the measuring function selector to the "EARTH VOLTAGE" position and press
the "TEST" key. The ground voltage is shown on the display. If the voltage is more
than 10 V, this can lead to an incorrect measurement of the earth resistance.
3.
To make a precise measurement of the earth resistance:
(1) Connect the green, yellow and red test leads to the device connections E, P and
C.
(2) Connect the crocodile clips of the test leads to the earth electrodes (according to
the figure below). The auxiliary electrodes attached to P and C must form a
straight line with the electrode to be tested (attached to E).
(3) Set the measuring function selector to a suitable measurement range, press the
"TEST" key and read the measured value.
