9 Controller Operation

9.7Cutout

As a protection against software or hardware fault or user error, the bath is equipped with an adjustable cutout device that shuts off power to the heater if the temperature exceeds a set value. This protects the instrument, probes, and fluid from excessive temperatures. The cutout temperature is programmable by the operator from the front panel of the controller. The cutout should be set to the temperature limits of the selected fluid.

If the cutout is activated because of excessive temperature, power to the heater shuts off and the instrument cools. The bath cools until it reaches a few degrees below the cutout set-point temperature. At this point the cutout resets and al- lows normal operation.

The cutout set-point may be accessed within the secondary menu. Press “SET” and “EXIT” to enter the secondary menu and show the heater power. Then press “SET” twice to access the cutout set-point.

S+E Access heater power in secondary menu

12.0P Heater power in percent

SAccess proportional band

Pb= 0.05C Proportional band setting

SAccess cutout set-point

CO= 80C

Cutout set-point

To change the cutout set-point press “UP” or “DOWN”.

CO= 70C New cutout set-point

To accept the new cutout set-point press “SET”.

SAccept cutout set-point

The next function is the configuration menu. Press “EXIT” to resume display- ing the temperature.

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GE CTR 80 manual Cutout, CO= 80C

CTR 80 specifications

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