Check drive motor fuse, if open replace the new one with same rating.Also check for the clogging of dispense tip and replace if required.Please check for the stirrer speed ,should not be on Zero position.
Perform the electrode maintenance task.Refill the electrolyte in the electrode Activate the electrode in the suitable solvent.Check for the proper connectivity of the instrument and the electrode.Check for the physically damage of the electrode if any.
Please check for the air bubble if any in the dispensing. Also check the weighing accuracy Please check for the electrode activation. If required change the electrolyte.Check for any contamination during analysis