AQ COMFORT Instruction & Operations Manual
Version 1.01
Page 36 of 44
CHAPTER 11
MAINTENANCE
The AQ Comfort Indoor Air Quality Monitor is a sophisticated analytical instrument
designed to perform accurate air quality measurements. However, because the monitor
is a portable, field/lab used instrument that can be used in many environments, care
must be taken to prevent physical and environmental abuse to help maintain trouble-
free operation.
There are some components that will require periodic inspection and/or replacement.
*Note: These stated intervals are dependent on the unit’s usage and applications
A. Sensor Replacement
This should be an infrequent operation, since the sensors have a typical life of a few
years.
If you receive an error message for one of the sensors during instrument operation you
may have to replace the sensor. Please contact E Instruments for replacement
sensors. The user can send the unit back to the factory for sensor installation and re-
calibration of the instrument or the sensors can be replaced in the field. The
replacement sensors will be supplied with installation instructions.
INTERVAL
ITEM
PROCEDURE
Weekly
ZERO Check of ALL Gas Sensors
Perform using ZERO AIR
Weekly
ZERO Check of the CO
2
Sensor
Perform using ZERO AIR
Annually
SPAN Calibration of ALL Gas Sensors
Perform Span or
Send to Factory
NOTE: You must always span calibrate the instrument every time
you replace a sensor.
NOTE: CO
2
should ALWAYS be Calibrated or Zeroed with a Cylinder of ZERO
AIR. Do Not Use Ambient Air for CO
2
sensor calibration.
