Dionex ICS-900 - Page 76

ICS-900 Operator’s Manual
68 Doc. 065215-02 9/09
Calibration
• Pressure Transducer
• Use the Calibrate Offset and Calibrate Slope buttons
when performing the pressure transducer calibration
procedure (see Section 5.1.3
).
• The Offset and Slope values and the date of the last
calibration are displayed.
• Conductivity Cell
• Use the Calibrate Offset and Calibrate Slope buttons
when performing the cell calibration procedure (see
Section 5.1.4
).
• The Offset and Slope values and the date of the last
calibration are displayed.
• Pump Flow Rate Calibration
• Click Calibration Procedure to perform the calibration
(see Section 5.1.5
).
• Click Log to record the calibration value in the Audit
Trail.
Diagnostic
• The Pump and Conductivity Cell Variance values are a
measure of the noise of the respective channels. The values of
these measurements will vary with differing eluents, pump
seal age and wear, background conductivity, and so on. When
values (obtained under the same conditions) are compared
they can be used as a relative measure of the performance of
the system.
• The Variance, Minimum, and Maximum readings for the
last time the Pump and Conductivity Cell diagnostic tests
were run are displayed.
Dummy Cell
Test
• 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 Log to perform the test and record the value in the
Audit Trail. Clicking Log enables the dummy cell, logs the
value, and then disables the dummy cell.
• The Dummy Cell On check box enables and disables the
dummy cell.