magnetic stirrers MCS66/MCS67 - FineMech

12.0 Error messagesThe MCS66/67 hotplate magnetic stirrer has been designed especially to be set up to operate completelyunsupervised. Therefore, it has an on-board self diagnostic program that detects possible failures and,should one occur, the MCS66/67 shuts itself down. To enable the user to prevent the problemre-occurring, the MCS66/67 will display any of the following error messages as it is switched on again.Please read carefully the following table of error messages.Error message:Reason for shut down:hotplate failure the hotplate temperature has exceeded 360 °Cthe hotplate temperature sensor is broken or damagedPlate > Safetythe measured plate temperature was greater than the safety temperatureProbe > Safetythe measured probe temperature was greater than the safety temperatureTIMER expiredNo Liq. contactDifferential ErrProbe failureTriac failurePlate SensorFailthe timer has expired (timer key)The "Liquid detection" circuit of the MCS66/67 has detected a too slow change in the temperaturemeasured by the external PT100 probe, while a significant increase of the hotplate temperature wasmeasured and the plate was switched on. The sensitivity of this safety circuit can be changed or disabled inthe setup menu.When operating with extremely large volumes, it can be necessary to set the sensitivity of this alarm to avery low level or even disable it.Differential AlarmThe differential alarm was triggered (Temperature measured by the PT100 probe dropped too fastalthough the plate was switched on). This error can be triggered if the probe is taken out of hot liquid, whilethe plate is switched on. The sensitivity of the differential alarm circuit can be changed in the setup menu.The external PT100 probe has failed (e.g. broken or short circuit)This error message can also occur if the PT100 probe is disconnected while the unit is runningThe Triac for hotplate heating is damaged.This alarm is triggered if the hotplate temperature still increases fast, although the plate is switched off.This error can accidentally be triggered, if the hotplate is switched off during a fast heat up of the hotplate.To verify if the triac for heating has really blown out, switch the unit off and let it cool down. Then switch theunit on (Plate must stay turned off). If a triac failure message is not again displayed within two minutes, thetriac works ok.the hotplate temperature sensor is broken or damaged13.0 MaintenanceThe outer housing of the MCS66/67 consists of a coated aluminum casing, together with an anodizedaluminum hotplate and a chemically resistant splash-proof membrane key-pad and therefore is easilycleaned with warm water and any proprietary liquid laboratory detergent. Do not use steel wool or anysimilar plastic wool sponge to clean the unit.In case of malfunction do not attempt to repair the unit. There are no user-serviceable parts inthis instrument.The CAT MCS66/67 should only be opened and repaired by authorized service personnel. Any work onthe electronics in the unit should only be carried out by knowledgeable, trained personnel. Any attempt bythe user to repair the unit will immediately render the guarantee null and void. Please contact your localdistributor in the event of a problem.version 1.04 page: 27