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Technical Information
Vent Valve Operation – Pulsed Venting (AUTO PUMP SPEED)
After pump STOP command, the controller performs a CONTROLLED VENTING
(see dedicated paragraph) to reduce the rotational speed down to 100 Hz. When
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: WIN 125 = 1, Auto Pump Speed.
If the pump is STARTING or in NORMAL OPERATION or in AUTOTUNING, the
NOTE
controller rejects the command OPEN VALVE.
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Agilent TwisTorr Medium-TMP Rack Controller User Manual
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