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Replace CPU or
Display/Keyboard Board
See note below **
* The low and high end of the sensor input is calibrated at the factory. Field calibration of the sensor may be
performed using the following technique: Enter the configuration routine and press the top left switch until a
little "c" (Item H) is displayed. Add water that is around 10°C to the bath completely covering the sensor.
Insert a calibrated thermometer. After the thermometer stabilizes, match the display setting to the thermom-
eter reading by pressing the "UP" or "DOWN" push button switch. Press the top left switch. The readout will
now display a big "C" (Item I). Remove water from the bath and add hot water of about 70 - 80°C. After the
unit stabilizes, match readout display to temperature on thermometer and press the top left switch. Calibra-
tion is now complete.
**Note:
When replacing CPU printed circuit board reprogramming may be necessary.
Follow thoroughly instructions provided with the replacement circuit board.
PARTS REPLACEMENT (CONT'D)
6. The software must be configured to match the Bath model.
To enter configuration mode, press the upper left push-button
switch while applying power. The upper left switch is labeled
"Set Point." This switch is used to enter configuration
codes and steps through the different levels of configurations.
When a triangle is shown in the chart, the push-button is to be
depressed once for each symbol.
Immediately following power up with the switch depressed,
the readout will display a 3-digit number. This is the software
revision. The readout will then begin to do a self-test of
digits. Press the "Set Point" button once. The readout will display
0000. Follow the listing below to complete the
configuration.
A. Enter 37 using up/down arrows. Press "Set Point"
B. Enter 31 using up/down arrows. Press "Set Point"
C. Enter 2.0 using up/down arrows. Press "Set Point"
D. Enter 500 using up/down arrows. Press "Set Point"
E. Enter 1 using up/down arrows.
F. Display Not Used.
G. Display Not Used.
H. LOW TEMP CALIBRATION*
LITTLE c. Factory Setting.
I.
HI TEMP CALIBRATION
BIG C. Factory Setting.
Configuration is now complete
14
Press "Set Point"
Press "Set Point"
Press "Set Point"
Press "Set Point"
Press "Set Point"
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