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Problem
The
PV
display
Check whether the input signal
keeps
indicating
wires of DC voltage (0 to 5 V
the value set in
DC, 0 to 10 V DC) and direct
[Scaling low limit].
current (0 to 20 mA DC) is
disconnected.
Check
terminals of DC voltage (0 to
5 V DC, 0 to 10 V DC) or direct
current (0 to 20 mA DC)
securely
instrument input terminals.
The indication of
Check whether sensor input or
PV
display
is
temperature unit (
irregular
or
correct.
unstable.
Sensor correction coefficient or
Sensor correction value is
unsuitable.
Check whether the sensor
specification is correct.
AC leaks into the sensor circuit. Use an ungrounded type sensor.
There may be equipment that
interferes with or makes noise
near the instrument.
Values on the PV
Terminals 14 and 17 are
display
do
not
closed, and the HOLD function
change.
is working.
Even if the UP key
Set value lock (Lock 1 or Lock
or DOWN key is
2) is selected.
pressed, values do
not change.
Possible cause
whether
the
input
are
connected
to
the
or
) is
How to check whether the input signal wire is
disconnected
[DC voltage (0 to 5 V DC, 0 to 10 V DC)]
If the input to the input terminal of this instrument is 1
V DC, and if a value corresponding to 1 V DC is
indicated, the instrument is likely to be operating
normally, however, the input signal wire may be
disconnected.
[Direct current (0 to 20 mA DC)]
If the input to the input terminal of this instrument is 4
mA DC, and if a value (converted value from scaling
high, low limit setting) corresponding to 4 mA DC is
indicated, the instrument is likely to be operating
normally, however, the input signal wire may be
disconnected.
Connect the input terminals of DC voltage and current
to the input terminals of this instrument securely.
Select the sensor input and temperature unit (
correctly.
Set them to suitable values.
Use a sensor with appropriate specifications.
Keep the instrument clear of any potentially disruptive
equipment.
Cancel the HOLD function by opening terminals 14 and
17.
Release the lock in [Set value lock].
25
Solution
or
)
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