User manual

Fault Action
Ghost peaks appear in the
gradient profile 1 A charged sample has been detected (e.g. protein).
2 Air bubbles are passing through the flow cell. Check for
loose tubing connections. If necessary, use a flow restrictor
after the conductivity flow cell.
Other problems
Error in external pH or Cond. 1 Check the chart recorder in accordance with its manual.
chart recorder 2 Test the recorder function and input voltage, which should
be 1 V full scale.
3 Check the conductivity scaling and pH scaling, see
section 3.8
Setting the Cond analogue output and section B.1.4
Checking recorder.
No text on the front display 1 Check that the mains cable is connected and the power
switch is in ON-position.
Monitor UPC-900
User Manual 18-1125-55 Edition AE
30
5 Trouble-shooting