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Page 51
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Operation
B800-00-880 Issue D
4
Operation
Before operating the pump, it is worthwhile configuring the various controller settings so that they are suitable for
the application.
If the system is designed to operate with parallel control and monitoring, there is no facility to change the majority
of the controller settings once the nEXT pump is installed on the system. The pump is supplied with all settings at
factory default values, as shown in
Table 16
. If any of the controller settings are to be changed, change them before
installing the nEXT pump on the system.
The nEXT pump can be configured using the customer serial system.
Section 4.1
details the commands that will be
needed to configure the controller. Alternatively, use the Edwards TIC Turbo and Instrument Controller or TIC Turbo
Controller. Further information regarding this is detailed in
Section 4.2
.
Note:
The standby speed may be adjusted using the button on the controller as described in
Section 4.1.4
.
If the nEXT pump is operated with parallel control and monitoring and the controller settings will not be reconfigured,
go straight to
Section 4.3
.
4.1
Configuring the nEXT pump using serial commands
Refer to
Table 16
for a summary of the full set of serial commands, parameter ranges and factory defaults for each
setting. The following sections describe the settings in more detail.
4.1.1
Power limit setting
Table 21
shows the power limit setting options for the nEXT pumps. The pump is supplied with a default power limit
as shown. If this limit is not suitable for the application, change it to any value between the maximum and minimum
shown.
Send the command as follows (where the 'd' characters represent the value in Watts that will be set. For example,
to set the limit to 90 W, type 90).
The reply will be in the following format:
The power limit setting is now stored in memory within the nEXT pump.
To check what power limit is set, send a query as follows:
WARNING
Do not operate the nEXT pump unless it is connected to the vacuum system. The pump rotor
rotates at very high speeds and the rotating blades might not be visible. If the pump is run
unconnected, the pump rotor can cause injury.
Table 21 - Power limit setting
Maximum value setting
Minimum value setting
Default power setting
200 W
50 W
160 W
Command
!
S
8
5
5
sp
d
d
d
cr
Reply
S
8
5
5
sp
r
cr
Command
?
S
8
5
5
cr
