Dionex UltiMate 3000 Series, Руководство по эксплуатации

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UltiMate 3000 Series:
SD, RS, and BM Pumps
Page 82 Operating Instructions
5.5.4 Setting the Pressure Limits
The pump firmware and Chromeleon provide default values for the upper and lower
pressure limits. The limits depend on the pump type. You are free to change the limits
within the allowed pressure range.
If the pump pressure is outside the specified limits, the related message appears on the pump
display. If the pump is operated with Chromeleon, the message is also displayed in the
Chromeleon Audit Trail. In addition, Chromeleon stops the flow and aborts the batch. Check
the Troubleshooting section for a short description of possible causes along with
recommended courses of action (

page 103).

Lower pressure limit
Helps to prevent the pump, and thus the column, from running dry. A typical setting is
1 MPa.

Upper Pressure Limit
Helps to protect the column from too high a pressure. The application and column type
determine the setting.
To set the pressure limits in Chromeleon
A Pressure range
The range within which the pressure limits can be set and the pressure unit are specified in the
in the Properties dialog for the pump (

page 39). You can set the upper and lower pressure
limits only within the specified range.
B To change the pressure limits for a specific application
1. Open the Commands dialog box for the pump (

page 65).
2. Select Pressure and enter the new limits under LowerLimit and UpperLimit .
The property is listed under PumpModule > [Pump Device Name] (

page 37).
To set the pressure limits on the pump display
1. Select the Control menu.
2. Check and change the settings for Max. pressure and Min. pressure if necessary.
You can change the Pressure unit on the Configuration menu. When the pump is operated
with Chromeleon, the pressure unit specified in Chromeleon will be used.