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5.3 CALIBRATION
Sensors naturally degrade over time, losing about 2% of their sensitivity per month. Over time a
sensor will start to underreport gas concentrations, meaning that a calibration is necessary to
maintain a safe environment.
When the Sensor Module(s) are due for calibration the respective LED will blink cyan-yellow as
opposed to its usual green to be able to see at a glance which sensor(s) is(are) overdue.
Information on Calibration Dates (when calibration is due, calibration frequency) can be found in
the UTx Menu.
Caution:
- Only qualified personnel should perform the actual calibration.
- Users new to gas calibration are advised to consult with Armstrong Monitoring
The Armstrong Monitoring Corporation offers the following calibration plans:
1. Factory pre-calibrated exchange replacement smart sensor 2 modules.
2. On site installation by Armstrong Monitoring.
3. On site calibration by Armstrong Monitoring.
4. Training by Armstrong Monitoring for end users.
For additional details please refer to Section 1.4 Contact Information.
5.3.1 REQUIRED EQUIPMENT; EZ Cal EXCHANGE PROGRAM
The following is a recommended list of equipment required:
•
Phillips and Robertson (Square) screwdriver set
5.3.2 REQUIRED EQUIPMENT; ON-SITE SENSOR MODULE CALIBRATION
We recommend calibration gas concentrations be as close to the maximum detection range as
possible. See Section 2.2 for recommended calibration gas and concentration.
Note: Calibration gas concentrations 20% higher than maximum detection range are not
supported the onitor’s enu.
Please refer to Section 3.3.1 for the Calibration Kit that provides the mating adaptor for
connecting the calibration gas cylinder to the face of the Sensor Module.