38
Attached function
Auto-light
function
Display brightness is controlled after measurement from the front light
sensor. This saves energy.
Power failure
countermeasure
The setting data is backed up in the non-volatile IC memory.
Self-diagnosis
The CPU is monitored by a watchdog timer, and if an abnormal status
is found on the CPU, the controller is switched to warm-up status.
Cold junction
temperature
compensation
This detects the temperature at the connecting terminal between the
thermocouple and the instrument, and always maintains it at the same
status as if the reference junction location temperature was at 0
(32 ).
Available for the SE2U/SE1U/SEWU (thermocouple input), SE2E, SE1E.
10. Troubleshooting
10.1 Indication
Problem
Presumed cause and solution
The Input display is
flashing "
" or
"
".
• 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 with 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 ( / )
setting 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
Setting or adjustment is
not possible.
• “Lock” is selected during Set value lock selection.
Select “Unlock”.
