Thermo Scientific Dionex UltiMate 3000 Series, Operating Instructions Manual

Page: 132 / 270

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Page 124 Operating Instructions
5.5.8 Purging the Pumps
If you observe pressure pulsation, a high noise level, or pulsation during the operation of
the pump or if the analysis is not reproducible, this may indicate that there are air bubbles
in the system.
If you observe shifts in retention time for a longer period with the NC pump, the reason may
be that you have changed solvents. When the previous solvent has not been removed
completely from the pump, shifts in retention time may be observed for a long time.
In these cases, purge the pumps as described in section 4.5.3 ( → page 72).
5.5.9 Detecting Liquid Leaks in the Pump Module
Leak detection is enabled as a standard when the module is shipped. When leak detection
is active and the leak sensor reports a leak
•
The Status LED on the front panel door is red.
• A message appears in Chromeleon and on the pump display.
• The Leak property in Chromeleon is set to Leak.
• A beep alerts you.
• The pump stops the flow if the leak sensor reports a leak for at least 3 minutes.
When the leak sensor reports a leak,
• Locate the source for the leak, eliminate the cause, and dry the leak sensor ( → page 177).
• You can disable the alarm temporarily.
To do so, open the
Commands dialog box for the pump and perform the AlarmOff
command.
This also turns off the beep and allows you to restart the pump flow.
If the leak sensor does not report Leak = NoLeak within 30 minutes after you have
restarted the flow, another leak alarm will be issued and the pump flow will be stopped
again.
You may disable leak detection permanently. (However, it is not recommended to do so.)
To do so, select one of the following alternatives:
• In Chromeleon, open the Commands dialog box for the pump module and set
LeakSensorMode to Disabled .
• On the pump display, select the Configuration menu ( → page 103) and set Leak Sensor
Mode
to
Disabled
.