Vent Valve Operation - Manual Venting - Agilent Technologies TwisTorr Medium Notice De Mode D'emploi

Vent Valve Operation – Manual Venting
The vent valve is operated manually, either via FRONT panel or via
SERIAL command.
Via SERIAL command, use WIN 122 = 1.
After pump STOP command, the vent valve stays closed waiting for
command given to the vent valve (WIN122 = 1 = open). When the
command OPEN VALVE is given, the controller performs a
CONTROLLED VENTING (see dedicated paragraph) to reduce the
rotational speed down to 100 Hz.
After the pump has reached 100Hz, the valve is closed for a time
defined by WIN 126 (delay), then it opens as set in WIN 147.
If WIN147 = 0, the valve remains open until next START command. If
WIN 147 ≠0, the valve opens for the time indicated. Then it closes
until the next START command.
Please refer to following graph:
Reference to existing description: ON COMMAND, WIN 125 = 0.
If the pump is STARTING or in NORMAL OPERATION or in AUTOTUNING, the
NOTE
controller rejects the command OPEN VALVE.
TwisTorr Medium-TMP Rack Controller User Manual / 87-901-049-01 (B)
Connection J1 Remote I/O Interconnections
Technical Information
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