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Diagnostics
Dummy Cell
Test
Audit Trail
5.1.2
Calibrating the Pressure Transducer
1. To remove any air in the injection valve loop, toggle the injection
valve position a few times by clicking Load and Inject on the
Chromeleon ePanel.(You should hear a click when the valve position
changes.)
2. Wait about 10 minutes, and then go on to
3. To open the Wellness panel, click Wellness on the Chromeleon
ePanel (see
4. Under Pressure Transducer, click Calibrate Offset. A panel with
instructions and command buttons appears.
5. Follow the instructions on the panel to complete the transducer offset
calibration procedure. The new offset will be determined and then
stored as the current value.
Doc. 155028-01 08/20
•
The Pump and Conductivity Cell Variance values are a
measure of the noise of the respective channels. These values
will vary, depending on eluent, pump seal age and wear,
background conductivity, and so on. The comparison of
values obtained under the same conditions can be used as a
relative measure of system performance.
•
The Variance, Minimum, and Maximum readings for the
last time the Pump and Conductivity Cell diagnostic tests
were run are displayed.
•
The dummy cell test connects a fixed resistance in place of
the conductivity cell. A measured value outside the typical
range of the test indicates a failure in the detector electronics.
•
Click the Log Dummy Value button to enable the dummy
cell, log the value, and then disable the dummy cell.
•
Click the Disabled check box to enable and disable the
dummy cell.
•
The Chromeleon audit trail displays an account of every event
(including errors, status messages, and operational events)
that occurs during Dionex Easion operation.
Figure
2-10).
5 • Service
Step
3.
63
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