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.
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 |