AirTest TR9277-EO-B User Manual - Page 2

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Quick Overview
Performing An Ambient CO
It is recommended that the installer perform an ambient air calibration of the TR9277-EO as part of the
installation process. This process takes 10–15 minutes and can be performed on site or prior to visiting
the site. Multiple sensors can be calibrated at the same time. The process outlined below activates the
automatic background calibration function with adjustment every 3 weeks and performs an ambient air
CO
calibration. Page 8 of this manual provides further instructions on other adjustments that can be
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made.
1)
Place the sensor(s) in outside air above 32ºF (0ºC), and out of direct sunlight for 10 to 15
minutes. Avoid breathing in the vicinity of the sensor during this process.
2)
Hold down the lower right button on the transmitter for 6 seconds until the green LED is
flashing.
3)
Next, press the side button until the red LED flashes to enter CO
4)
Hold side button in for 6 seconds to enter CO
blinking.
5)
Pressing the side button will cycle the device through different adjustment options. Press
the side button until the amber (middle) LED is activated. This option will Activate the ABC
self-calibration interval and perform an ambient calibration (assuming outside air is 420
ppm).
6)
Press and hold the button 6 seconds or until the Amber LED is rapidly flashing. Put the unit
in a shaded outdoor location and wait until the amber LED stops blinking. At the end of the
process (<2 minutes) the green LED will blink 10 times. The sensor will then enter normal
operation.
7)
Install the sensor in the targeted location and connect to an EnOcean network.
Reading the CO
Concentrations
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The TR9277-EO does not have a digital display, but it is possible to 1) quickly determine the general
range of CO
concentration in the space and 2) Determine the actual concentrations in the space.
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The process for this is provided in the illustration below. If you would like a copy of this illustration to
post near the sensor, it is available at
TR9277-EO Manual
Calibration
2
www.AirTest.com/ds/TR9277ReadingLevels.jpg
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adjustment options. The green LED will start
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adjustment mode.
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