To ensure proper function of your LabMaster-aw neo, it is inevitable that the measurement sensor works as intended. But when is a sensor change needed and how is that done?
The sensor in your aw meter will lose its measuring capabilities over a life cycle of 3-5 years. These 3-5 years are depending on the amount of measurements you go through and the applied measurement temperature. Note that chemical protection filters must be used and exchanged once saturated once sample contains volatile compounds as glycerol, polyethylene glycol, acetic acid, strong aroma etc.. Otherwise, life cycle will be shortened remarkably.
Use the SAL-T standards included in delivery to check, if your LabMaster-aw neo is in perfect shape. This verification is recommended to be done regularly (weekly or biweekly). Best practice is a verification tolerance of +/- 0.005 aw but you can set the limit according to internal rules or however you think is best for your accuracy and repeatability needs. As the SAL-T standards contain RFID identification, this check is proceeded automatically and fool-proof.
If verification is out of tolerance, a calibration at 2 points is required at least. If a chemical protection filter is installed, monitor the calibration interval. If verification fails more often and thereby calibration needs to be performed more frequently, it is an indication that the measurement sensor is contaminated and chemical protection filter needs to be replaced.
For detailed information about verification and calibration of your LabMaster-aw neo, please refer to the operating manual or contact your local Novasina distributor. Contact details can be found here.
Sensor's end of life-time is indicated if a calibration at a specific point cannot be performed anymore. In this case, the sensor drift became to much and it is time to say good-bye to the installed sensor and hello to a new one. But first make sure if used SAL-T standards are in perfect conditions!
Once you got the new sensor for your LabMaster-aw neo, learn how to replace it by watching the video below: