Hioki CM7290, Инструкция по эксплуатации, Страница: 61 / 80

57
Troubleshooting
Problem Check Solution See
Display will not
reset to zero
• Has DC or AC+DC
measurement mode been
selected?
• Execute zero adjustment.
p. 16
• Is the possible range for
zero adjustment exceeded?
×1 range Approx.
± 80 dgt.
×10 range Approx.
± 800 dgt.
• If the range is exceeded,
the current sensor must be
repaired.
−
• Is the response speed set to
SLOW ?
• If the response speed is set
to SLOW , the display may
not read zero immediately.
p. 17
Display value is
lower than expected
Current measurement
• Are the sensor jaw tips
damaged?
• Is damage is evident, have it
repaired.
−
• Are the sensor jaws tightly
closed?
• Close them tightly. If they
are not properly closed, the
value will be low.
−
• Is the measurement mode
suitable?
• Select a measurement
mode that is suitable for the
conductor to be measured.
p. 16
• The method for executing
zero adjustment in the DC or
AC+DC measurement mode
is correct?
• Execute zero adjustment.
A lower than expected
display value will result if
the measurement are made
while the unit is displaying a
negative value.
p. 16
• Are you measuring a current
of 10 Hz or lower?
• To measure current of not
more than 10 Hz, select the
AC+DC mode, and set the
display/output update rate to
SLOW .
p. 16
• Has SLOW been set with
auto ranging?
• With SLOW , measurement
of rapid variation is not
possible. Set NORMAL or
FAST .
p. 37
10
9
8
7
6
5
4
3
2
1
Appx.
Ind.