E5CS-X
E5CS-X
45
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WHEN ALL FUNCTIONS HAVE BEEN SELECTED
To Set Temperature
Press the return key until the SP indicator lights. Then set the
desired temperature value by using the Up and Down keys.
To Set Alarm Value
Press the return key until the AL indicator lights. Then set the
desired alarm value in units of
°
F or
°
C. If the present tempera-
ture exceeds the set alarm value, the alarm output will be issued.
Neither the set alarm value is displayed nor the AL indicator
lights with the integral alarm mode setting switch set to 0 or 9. Be
sure to check the alarm mode setting switch, located inside the
housing, for proper setting.
In Case of Sensor Failure
The error message “FFF” or “–––” will appear on the main display
if the temperature sensor short-circuits or breaks.
Precautions
The E5CS-X temperature controller has self-diagnostic functions that display the following error messages to simplify troubleshooting.
Message
Cause
Control output
fff
(1) Temperature has risen beyond temperature scale range
(2) Thermistor has been short-circuited
OFF during heating (reverse) operation
ON during cooling (normal) operation
---
(1) Temperature has fallen below temperature scale range
(2) Thermistor has broken
ON during heating (reverse) operation
OFF during cooling (normal) operation
fff
(blinks)*
(1) Failure has occurred in thermocouple or platinum RTD
(2) Temperature has risen much beyond scale range
OFF
---
(blinks)*
(1) Failure has occurred in platinum RTD
(2) Polarities (positive and negative) of thermocouple are reversed
(3) Temperature has fallen much below scale range
OFF
e11
or
e33
*
(1) Memory failure (E11) display
(2) Analog-to-digital converter failure (E33) display
Temperature controller must be repaired if recovery is not made
by turning power off once and on again.
Both control outputs and the alarm output
are OFF
Note: *Key operations are disabled.
When the alarm outputs are used, an alarm output occurs when the “FFF” and “–––” messages appear in the display. These dis-
plays indicate when the temperature has risen beyond or fallen below the temperature scale range.
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SENSOR FAILURE INDICATION
Condition
Display
Control output
Thermocouple sensor
Break in sensor
fff
blinks
OFF
Short-circuit
Ambient temperature
OFF
Platinum RTD sensor
Break in sensor
fff
blinks
OFF
---
blinks
OFF
Disconnection of two or three wires
fff
blinks
OFF
Short-circuit
---
blinks
OFF
Thermistor sensor
Break in sensor
---
ON during heating (reverse) action
OFF during cooling (normal) action
Short-circuit
fff
ON during heating (reverse) action
OFF during cooling (normal) action
Note: The resistance of the platinum RTD is 100
Ω
at 0
°
C and increases to 140
Ω
at 100
°
C.
