AQT400 maintenance - AQT400 - AQT410 - AQT420

AQT400 Series User Guide

Document code
M211942EN
Revision
E
Language
English
Product
AQT400
Document type
User guide
The maintenance interval depends strongly on usage conditions, but a typical maintenance interval is 24... 36 months. Vaisala recommends performing maintenance regularly.

AQT400 requires the following maintenance activities:

  • Remove visible obstructions and dust from the device.
  • Change electrochemical gas cells every 24 ... 36 months.

    Vaisala offers changing of the gas cells as a service in Vaisala service center. Alternatively a qualified Vaisala representative can perform the operation locally. To support maintenance planning and preventive maintenance, AQT400 provides a service indicator for replacing the electrochemical cells.

  • (AQT420) Replace the LPC filter every 24 ... 36 months. Vaisala provides the LPC filter as a spare part.
  • Replace the combined humidity and temperature sensor when it is not functioning properly.

After the warranty period, a fixed-price repair service is available.

To purchase the services, visit https://vaisala.com/store.

Table 1. Spare parts and order codes
Spare part Order code

AQT400 base module, including new calibrated electrochemical cells

Compatible with AQT420 and AQT410

AQT400U-SP

AQT400T-SP

AQT400I-SP

Filter for the AQT420 laser particulate counter (LPC) Contact your Vaisala representative
Combined humidity and temperature sensor