Changing calibrated electrochemical cells - AQT400 - AQT410 - AQT420

AQT400 Series User Guide

Document code
M211942EN
Revision
E
Language
English
Product
AQT400
Document type
User guide

AQT400 series uses electrochemical cells for pollution gas measurement. The electrochemical cells are consumables which must be changed at regular intervals. The estimated lifetime of the cells is 24 ... 36 months, depending on the conditions where the cells are operated.

Monitor the service indicator (device health) in Vaisala Beacon Cloud and AQ Tool. When the device health is lower than 30 %, Vaisala recommends changing the electrochemical cells.

To have the electrochemical cells changed, do one of the following:

  • (Recommended) Send AQT400 for preventive maintenance to Vaisala service center or to a qualified Vaisala representative. As part of routine maintenance, Vaisala cleans AQT400, changes new calibrated electrochemical cells to the AQT400 base module, and changes the LPC filter.
  • Purchase the AQT400 base module including new calibrated electrochemical cells. Replace the base module with the new one according to the provided instructions. See Vaisala Air Quality Transmitter AQT400 Series Configuration Guide. Only an experienced electromechanician may perform this maintenance procedure.