GE Analytical Instruments ©2010 163 of 226 DLM 74001-04 Rev. A
Chapter 8: Troubleshooting
10. On the Analyzer’s touch screen, press the Menu button, then select Maintenance Advanced
Diagnostics
Test Pumps.
11. Press the Sample Pump button and then select On.
12. Let the Analyzer run this way for approximately 5 minutes. Then, press the Sample Pump button and
select Off.
13. Restore the sample pump tubing connections to their normal configuration.
14. Restore the inlet and waste fittings to their normal configuration.
Negative, High, or Erratic Measurements
Many of the previous steps in this chapter will help troubleshoot negative or erratic measurements. If the
previous steps did not remedy the situation, you may need to perform one of the following procedures.
Conductivity Autozero
If the Analyzer is returning unusually high IC or conductivity values, a sample conductivity cell autozero may be
necessary. If you have recently run a system protocol, let the Analyzer run for at least five hours before
performing a conductivity autozero.
1. Make sure the Analyzer is not taking measurements.
2. Press the Menu button and select the Maintenance tab.
3. Press the Advanced button.
4. Press the Cond. Autozero button.
Sample Conductivity Cell Calibration
If for any reason the sample conductivity cell has been replaced, or you suspect poor performance of the cell,
then you may need to perform a sample conductivity cell calibration. For this protocol you will need a Sievers 25
µS/cm Conductivity Standard (as HCl). If you have a Super iOS, place this standard in vial port 1.
1. Make sure the Analyzer is not taking measurements.
2. Press the Menu button and select the Maintenance tab.
3. Press the Cal/Ver/Validate button.
4. Press the Sample Cell Cal button.
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