CS200
Control Systems
36
Access the menu by pressing
Highlight CHANGE SETTINGS and press
Highlight TEMPERATURE and press
Highlight CALIBRATE and press
Highlight CALIBRATE THERMOCOUPLE 1.
The display will read Dip the thermocouple into ice water.
Submerge the thermocouple into an ice water bath. The bar graph will fluctuate. When a good
stable reading in obtained, the bar graph will decrease to 1 or 2 bars. At this point, press to
lock in the value. Dry the thermocouple.
The display will read Dip the thermocouple into LN
2
.
Submerge the thermocouple into LN
2
. The bar graph will fluctuate. When a good stable read-
ing in obtained, the bar graph will decrease to 1 or 2 bars. At this point, press to lock in the
value
If the calibration values fall within the expected range, “DONE!” Will be displayed on the
screen.
Test Temperature System
The temperature circuitry can be checked at any time through the menu system. This check will tell if the
thermocouples are working or if they are “open” (broken or unplugged). If a thermocouple is not connected to
the control it will check as “open.” If a thermocouple is “
Disabled
” through the menu system, it will not show up
on the check.
Test Level Sensors
The sensor assembly can be tested through the menu system. The sensor diagnostics indicates the sensor
number and the status (whether in liquid or gas). If the control is set for an eight-thermistor it will indicate 9
sensors in the diagnostics. The status is indicated with either an “O” for open, a “G” for gas or an “L” for
liquid. This is an easy means to tell if sensors are in or out of liquid or if a new sensor assembly is needed
(open or defective sensors).
If the sensor assembly is unplugged and the main control is still on, the display will indicate that a sensor error
Table 8.0 Temperature Calibration Instruction
Controller
Operation
Summary of Contents for CS200
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