Controller Internal And External Fan - Agilent Technologies TV 303 Bedienungshandbuch

17 Technical Information
Interconnections
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Note that the vent valve can also be controlled by means of the serial
connection.
A serial communication kit with a serial cable and the Navigation
software is available (optional).

Controller Internal and External Fan

The fan logic is the following:
Controller Over-Temperature Limit
The controller over-temperature limit is set at 70 °C.
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internal and external fan ON when pump is in "ramp" status
internal and external fan OFF if power is less than 34W
internal and external fan ON if power is greater than 36W
internal fan ON if controller temperature is greater 65 °C
internal fan OFF if controller temperature is less than 55 °C
internal fan can be switched ON by setting WIN 138 to "1" and
stays on for a period of time configurable using WIN138
A+ (RS422 Optional)
GND
A + (RS485)
B - (RS422 Optional)
B - (RS485)
Reserved
TV 303 User Manual / 87-901-019-01 (A)