- 130 -
Problem
Possible Cause
Solution
Check whether the input terminals
of thermocouple, RTD or DC
voltage (0 to 1 V DC) are securely
mounted to the instrument input
terminals.
Connect the sensor terminals to the
instrument input terminals securely.
The PV Display
flashes [
____
].
The PV Display
indicates [
____
]
and [
er07
]
(*)
alternately.
PV has dropped below the
Indication range and Control
range.
Check the input signal source and wiring of
input terminals.
Check whether input signal wire
for direct current (4 to 20 mA DC)
or DC voltage (1 to 5 V DC) is
disconnected.
How to check whether the input signal
wire is disconnected:
[Direct current (4 to 20 mA DC)]
If the input to the input terminals of the
instrument is 4 mA DC and if a scaling low
limit value is indicated, the instrument is
likely to be operating normally, however, the
signal wire may be disconnected.
[DC voltage (1 to 5 V DC)]
If the input to the input terminals of the
instrument is 1 V DC and if a scaling low
limit value is indicated, the instrument is
likely to be operating normally, however, the
signal wire may be disconnected.
Check whether input signal wire for
direct current (4 to 20 mA DC) or DC
voltage (1 to 5 V DC) is securely
connected to the instrument input
terminals.
Connect the input signal wire to the terminals
of this instrument securely.
Check if polarity of thermocouple
or compensating lead wire is
correct.
Check whether codes (A, B, B) of
RTD agree with the instrument
terminals.
Wire them correctly.
The PV Display
indicates [
].
Hardware malfunction
Contact our agency or us.
The indication of
PV Display is
irregular or
unstable.
Check whether sensor input or
temperature unit (
or
) is
correct.
Select the sensor input and temperature
unit (
or
) correctly.
Sensor correction coefficient or
Sensor correction value is
unsuitable.
Set them to suitable values.
Check whether the sensor
specification is correct.
Use a sensor with appropriate
specifications.
AC leaks into the sensor
circuit.
Use an ungrounded type sensor.
(*) Available when ‘Enabled’ is selected in [Error indication].
Содержание PCB1
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