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9.7 Cutout
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
12.0 P Heater power in percent
S
Access proportional band
Pb= 0.05C Proportional band setting
S
Access 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”.
S
Accept cutout set-point
The next function is the configuration menu. Press “EXIT” to resume display
-
ing the temperature.
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9 Controller Operation