Hioki FT3151, Instruction Manual

Page: 121 / 132

57
Before Returning for Repair
Symptom Checkpoint
The S or H check does not enable
the needle to rest on the green
range.
The earth resistance of the auxiliary
earthing rod pole is too high.
Change the position of the rod, and/
or pour water over the rods.
When measurement is performed
with the E, C, and P terminals
short-circuited with each other, the
measurement result is 0
Ω
.
This is not a defect.
Check a break in the measurement
cable and the earthing condition of
the earth electrode.
The 2-pole measurement method
cannot be carried out for the newly-
built house.
Measurement cannot be performed
in the absence of electric power
distributed by a power company.
The result measured with the 2-pole
measurement method is larger than
the expected resistance value.
As for the 2-pole measurement
method of the FT3151, the accuracy
of the ×1
Ω
range is not guaranteed.
So the measurements of a low earth
resistance (10
Ω
or lower) is not
accurate.
The measurement result obtained
by using the existing auxiliary
measurement electrodes is 0 Ω .
The earth electrode may be
connected to the auxiliary
measurement electrodes through
concrete.
Do not use the auxiliary
measurement electrodes. Instead,
drive the auxiliary earthing rods into
the ground and measure it with using
them.
The battery voltage check does not
enable the needle to move even
after the batteries are replaced with
fresh ones.
The instrument has been damaged.
Contact your authorized Hioki
distributor or reseller.
1
2
3
4
5
6
7
Appx.
Ind.