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10. Troubleshooting
10.1 Indication
Problem
Presumed Cause and Solution
The Input display is
flashing "
" or
"
".
The input value does not
change.
• The sensor may be burnt out.
Change each sensor.
• Check whether the sensor is securely connected to the
input terminals of the instrument.
Ensure that the sensor terminals are securely connected to
the input terminals of the instrument.
• Check the input signal source.
• Check whether polarity of thermocouple or compensating
lead wire is correct.
Check whether codes (A, B, B) of the RTD match the
instrument terminals.
Ensure that they are wired properly.
The indication of the
Input display is irregular
or unstable.
• Check whether the sensor input and temperature unit
( / ) settings are correct.
Ensure that sensor type and temperature unit ( / ) are set
properly.
• Check whether the sensor correction value is suitable.
Set it to a suitable value.
• AC leaks into the sensor circuit.
Use an ungrounded type sensor.
• There may be equipment that interferes with or makes
noise near the unit.
Keep equipment that interferes with or makes noise away
from the unit.
10.2 Key Operation
Problem
Presumed Cause and Solution
Settings are not possible. • “Lock 1” or “Lock 2” is selected in [Set value lock].
Select “Unlock”.
10.3 Operation
Problem
Presumed Cause and Solution
Alarm output does not
turn ON.
• Check whether alarm value and alarm delay time have
been set to suitable values.
• Check whether Alarm type and Alarm Energized/
De-energized have been selected correctly.
Alarm output does not
turn OFF.
• Check whether alarm value and alarm hysteresis have
been set to suitable values.
• Check whether Alarm type and Alarm Energized/
De-energized have been selected correctly.
• Check whether Alarm HOLD function is working.
To turn the alarm output OFF while Alarm HOLD function is
working, turn the power to the unit OFF.