Maintenance Intervals

The following maintenance activities are required.

Interval	Function
During Commissioning	Perform bump check or calibration to confirm instrument functionality.
	Check LEDs for proper operation.*
	Check for proper buzzer and relay operation.*
	Check signal transmission to the BMS/BAS (central controller) if connected.*
Periodic Maintenance Interval**	Inspection by trained service personnel.
	Check LEDs for proper operation.*
	Check for proper buzzer and relay operation.*
	Check signal transmission to the BMS/BAS (central controller) if connected.*
	Calibrate the sensor or contact MSA to purchase a factory‑calibrated sensor.
As Required	Replace sensor module(s)

* Feature may be activated via Modbus commands or monitor X-Series App.

** Typical maintenance frequency may vary by sensor type.

Sensor Type	Maintenance Interval	Typical Sensor Lifetime (Individual sensor performance can vary based on specifics of sensor usage.)
Semiconductor*	6 months after commissioning 12 months thereafter	~5 years
Infrared	12 months	5+ years

* Sensors should be checked, calibrated, and potentially replaced after exposure to significant concentrations of gas, which can shorten the sensor lifetime and/or reduce its sensitivity.