Chapter 15 Maintenance and troubleshooting15.2 Troubleshooting208 HORIBA15.2.2 More troubleshootingThis section explains how to respond to vari-ous symptoms of trouble that are not indi-cated by an error number.Nothing shows up on the display when the power is turned ONThe indicated value fluctuatesWhen there is a problem with the electrode;Cause How to solve problemAC adaptor is notproperly connected.Check the connection of the AC adaptor.The pH meter isdefective.Contact with the nearest sales representative.Cause How to solve problemThe responsivemembrane is dry ordirty.Wash the responsive membrane.The responsivemembrane is dam-aged or worn out.Replace the electrode.There are air bub-bles on the elec-trode.Shake the electrode to remove the air bub-bles.There is no standardsolution remaining.Fill the electrode with new standard solution,as noted in the electrodeoperation manual.The wrong standardsolution is beingused.Use the correct standard solution.Influence of sample. Readout may fluctuate according to the char-acteristics of sample.
