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Microprocessor Control Water Baths
1. Place a calibrated reference thermometer in the bath (a thermometer clip is provided with the
accessories package). (See Figure 2 for placement.) Allow the thermometer to reach temperature and
remain stable for one (1) hour.
2. Compare the reading on the reference thermometer with the temperature control display. If there is a
difference, put the display into calibrate mode by pressing both the Up and Down arrow pads at the
same time until the two (2) outside decimal points begin to blink.
3. When the decimal points are blinking, press the Up or Down arrow pad to adjust the display to match
the reference thermometer. If the arrow pads are not pressed within five (5) seconds the display will
revert to showing the temperature within the bath.
4. Allow the unit to stabilize again, and repeat calibration if necessary.
5. On the W614M, both tanks will need to be calibrated individually.
Setting the Overtemperature Limit Thermostat
To set the Over Temperature Limit Thermostat, perform the following steps:
1. Verify that the Limit Thermostat was set to its maximum position to allow the water bath to stabilize.
2. Turn the Limit Thermostat counterclockwise until the Safety indicator light turns on.
3. Turn the Limit Thermostat clockwise until the OTL indicator light turns off.
4. Turn the thermostat clockwise again, two (2) of the smallest divisions on its scale past the point where
the indicator light went out. This will set the Safety Thermostat at approximately 1
C above the Main
Temperature set point.
Figure 2. Thermometer Placement
9850563
Note:
Water bath thermometer must be placed so that the bulb is always fully immersed. The thermometer
must not touch the sides or the bottom of the bath tank.
Bath Cover Assembly
To assemble the bath cover, perform the following steps:
1. Insert two (2) self-tapping screws through the respective cover holes and into the holes in the handle,
leaving the first self-tapping screw loose to assure proper alignment. See Figure 3. Firmly fasten both
screws into place. Do not over-tighten.
Figure 3. Bath Cover Assembly
Handle Part #3800609
