WIKA CF1M User Manual
Page 11
Operating Instructions Temperature Indicating Controller CF1M
V1.
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(2) Self-diagnostic function
The CPU is monitored by a watchdog timer, and when any abnormal status is found on the CPU,
the controller is switched to warm-up status.
(3) Automatic cold junction temperature compensation (thermocouple input type)
Detects the temperature at the connection terminal between thermocouple and instrument,
and always keeps it on the same status as when the reference junction is located at 0°C (32°F).
6. Action explanations
6.1 Standard action drawing
Non-contact
voltage output
Indicator (OUT)
Green
ON
OFF
ON
OFF
12Vdc
Heating (reverse) action
Cooling (direct) action
Proportional band
Proportional band
Action
Setting
Setting
Cycle action
according to deviation
Changes continuously
according to deviation
Control action
Current output
Lit
Unlit
Unlit
Lit
part: Acts ON or OFF.
Relay contact
output
+
12/0Vdc
0Vdc
+
+
0Vdc
+
0/12Vdc
+
+
12Vdc
+
+
+
+
+
+
20mAdc
20 to 4mAdc
4mAdc
4mAdc
4 to 20mAdc
20mAdc
3
4
3
3
4
4
3
4
4
4
3
3
3
4
3
4
4
4
4
4
3
3
3
3
4
3
3
3
3
3
4
4
4
4
4
3
Cycle action
according to deviation
Cycle action
according to deviation
Cycle action
according to deviation
Changes continuously
according to deviation