Thermo Scientific Dionex ICS-5000 Operator's Manual page 86

Dionex ICS-5000 Operator's Manual
cycling in the baseline. This, in turn, can affect the reproducibility of an
analysis. The higher the conductivity, the more pronounced the effect.
To reduce the effect of temperature variation, the DC provides temperature
control of both the DC compartment and the cell. A heater inside the cell
regulates the cell temperature. The cell heater temperature range is from a low
of 5 °C above the temperature of the upper DC compartment to a high of
60 °C.
Temperature Compensation
Built-in temperature compensation helps minimize changes in the baseline or
in peak heights if the operating temperature is different from the temperature
at which the cell was calibrated. The default temperature compensation is
1.7% per °C. This can be reset to between 0% and 3.0% per °C, depending on
the eluent. If you notice that the baseline shifts up when the temperature
increases, the compensation factor is too low and should be reset to a higher
value.
To change the temperature compensation factor:
1. Open the Chromeleon 7 ePanel Set or the Chromeleon 6.8 panel tabset.
2. Press the F8 key to open the Commands dialog box.
3. Select the conductivity detector.
4. Select the Temperature_Compensation property and enter the value.
5. For Chromeleon 6.8, click Execute.
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