Edwards nEXT240, Инструкция по эксплуатации

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Operation
B800-00-880 Issue A
For information on how to perform these settings, refer to the TIC Turbo and Instrument Controller or TIC Turbo
Controller Instruction Manuals.
Note: It is not possible to configure the Analogue Output Options using the TIC. There is also no facility within
the TIC to assign a multi-drop address to the nEXT pump.
There is a further option of connecting the TIC to a PC and using the TIC PC Program to configure the nEXT pump.
The TIC PC Program allows you to configure all the settings shown in the list above as well as allowing configuration
of the Analogue Output Options and assignment of a multi-drop address. Refer to the TIC PC Program Instruction
Manual for more information.
4.3 Start-up
Irrespective of the system you use to control the nEXT pump, work through the following steps before starting the
pump.
4.3.1 Close the vent valve

If you are using a manual vent valve, turn it clockwise to close it.

If you are using your own control system to drive a vent valve, make sure that the vent valve is closed.

If you are driving a TAV solenoid valve from the Controller, the TAV valve will automatically shut when the
pump is started.

If you are using the TIC to operate the vent valve, refer to Section 4.7 .
Note: The backing pump and nEXT pump can be started at the same time, the nEXT pump will not be damaged
and can operate as an effective baffle. However, if the vacuum system is large (100 litres or larger) it will
be more efficient to allow the backing pump to reduce system pressure to 10 mbar before starting the nEXT
pump. In this case it will be necessary to close the vent valve in advance of starting the backing pump.
If you are using the Controller to control a TAV solenoid valve but you are operating in pure Parallel Interface Mode,
you will NOT be able to shut the valve in advance of starting the nEXT pump because you do not have the facility to
send the appropriate serial command. If you have the facility to send serial commands you can perform a delayed
start, refer to
Section 4.5.1 .
Note: If you are using a diaphragm pump for backing the nEXT pump, allow a delay of 2 minutes before starting
the nEXT pump.
4.3.2 Pre-start checks
1. Turn on the appropriate cooling device (fan or cooling-water supply).
Note: If you have configured the Controller to drive a fan, the fan will automatically start when power is supplied
to the nEXT pump.
2. Start the backing pump.
3. Switch on the power supply to the pump. Check that the three LEDs on the Controller light up for approximately
0.5 seconds and then extinguish.
If the LEDs do not light up as expected, or if the red or yellow LED begins to flash a repeated sequence , refer to
Section 5.5 .