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(1) Insert Test Lead with probe (MODEL7208) into the Earth terminal of the
Tester, and contact the tip of the Test Lead with the earth contacts of the
socket on the Tester.
(2) Hold down NULL switch at least 2 sec. on any screen.
(3) The screen switches to NULL screen, and NULL measurement starts. The
LCD shows blinking “MEAS” mark and measured value during a
measurement. The measured value is saved and subtracted from the
further measured values.
(4) If
the measured value is less than 3 Ω, previous NULL value is cleared and
a new value is saved. When
3 Ω or higher is measured, previous NULL
value is just cleared (NULL mark disappears).
4.3.2 Voltage setting for insulation resistance measurement
(How to change between 250V and 500V)
Two difference rated voltages, 250 V and 500 V, are available for insulation
resistance test. Press 250V/500V switch on the stand-by screen or while
measured result is being displayed at CL I/ CL II/ Extension lead test. Default
setting is 250 V.
Sets to 250 V.
Sets to 500 V.
