Ground Resistance Tester Model 6471
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CHAPTER 5
AUTOMATIC MODE
VOLTAGE CHECK: The tester first checks for possible interference. If there
is an external voltage of more than 42V, the warning triangle will be
displayed. If measurements are being performed in AUTO mode and a
disturbance frequency is detected, the tester will automatically look for a
frequency that is different from the default 128Hz.
5.1 Switching the Test Voltage
Available in all functions except mΩ and 2 Clamp.
If necessary, the test voltages can be switched to either 16 or 32V as follows:
• Press the Hz/OPTIONS button, then press it again to make the output volt-
age (Uout) blink.
• Use the ► button to switch to 16 or 32V, then press Hz/OPTIONS again.
This setting is retained when the unit is turned off.
5.2 Resistance Measurement mΩ (2-Wire)
WARNING: Before performing the resistance test, verify that the sample
under test is not energized.
1. Set the switch to
.
2. Connect the resistance to terminals H (Z) and E (X).
R
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