!
WARNING
PART 8 AND 9 ARE ONLY FOR
SKILLED AND PROFESSIONAL
PERSONNEL ONLY.
Users are not suggested to try
to carry out the operations in
part 8 and part 9. Improper
operation will lead to the FHT
tester inaccurate, even could
not work.
8.HOW TO SET THE TIME OF
AUTO POWER OFF
The default setting for auto power
off at the factory is 5 minutes.
That means the tester will auto
power off 5 minutes from the time
of last key operation. Users can
change it to any value between 0-
9 minutes by following steps.
Depress the POWER for about 4
seconds, release it after "OFF"
shows on display, then press the
key 'MAX' to preset the time as
desired. To disable the function of
auto power off, just preset the
time to 0. the tester will only be
shut down manually in such a
case.To quit the time setting, just
press the key ZERO.
Model
Tip
Coefficient
FHT-801
FHT-802
FHT-803
3.5mm
7.9mm
11.1mm
k=10.399
k=2.041
k=1.053
3.5mm
k=10.399
9.ACCURACY VERIFICATION
Prior to use, the FHT tester
accuracy should be verified by
testing with weights.
FHT accuracy can be easily
verified by the following formula.
P=N/S
Here P is FHT reading
N is the force applied to the
plunger tip
S is the area on which the
force is applied.
Based on the above formula,
coefficients are given for
different models below.
7
