Hioki 3151 - Page 32

20
―――――――――――――――――――――――――――
Chapter 4 Measurement Procedure
――――――――――――――――――――――――
NOTE
① Checking earthing condition of auxiliary
earthing rod
C
Set the range selector to C and press the
measurement button (
PRESS ON
). Verify that
the needle of the galvanometer is within the
green "
P/C CHECK" range.
② Checking earthing condition of auxiliary
earthing rod
P
Set the range selector to P and press the
measurement button (
PRESS ON). Verify that
the needle of the galvanometer is within the
green "
P/C CHECK" range.
If the needle of the galvanometer is not
within the green range, the earthing
resistance of the auxiliary earthing rod is too
high and accurate measurement results will
not be obtained.
Change the position of the rod, and/or make
sure that the ground has sufficient humidity
(pour water if necessary). Then repeat the
check.
If the 2/3 pole measurement selector
(
TERMINALS) is set to "2a"or"2b", the check
will not give correct results.