Clamp-on Ground Resistance Tester Model 6417
23
5.3 Display Example
Figure 5-2 shows a typical display upon
first use, with the device set to
Ω+A
. In
this example the measured current is
30.0mA and the impedance is 7.9
W
.
The buzzer is active and the memory is
empty.
NOTE:
This display corresponds to the
device in Standard mode. In Advanced
mode, two additional screens are
Figure 5-2
shows a display, upon first
use, with the device set to
A
. In this
example, the current measured is
30.0mA.
The buzzer is active and the memory is
empty.
Figure 5-3
5.4 Turning the Instrument ON
With the clamp closed and not clamped around any conductor, set the rotary
switch to a position other than OFF. All icons on the display light for approxi-
mately two seconds, before possible entry of the date and time (see
§
5.2).
During the first few seconds of operation, the clamp automatically adjusts cor
-
rection factors to optimize the impedance measurement. This correction makes
it possible to allow for the variations of the measurement head air gap that may
occur in some temperature and humidity conditions.
During this adjustment, the screen displays
CAL GAP
. If the clamp detects a
problem, it indicates
Err CAL
when the switch is set to
Ω+A
. Turn the instrument
OFF, disconnect it from any conductor and make sure the sensor heads are
clean with no obstructions, then turn it back ON.
When this adjustment is done, the clamp displays the screen corresponding to
the switch setting.
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