QRAE II User Guide
Page 59
3.
Remove the front sensor cover by loosening the two screws on the back of the
monitor below the battery cover. Use the supplied hex wrench.
4.
Push the screws from the back of the monitor to pop the cover off the front.
5.
Locate the sensor you need to replace.
6.
Using the sensor
puller, carefully remove the sensor by pulling it straight out.
7.
Replace the sensor with a new one. Make sure the pins are not bent or corroded.
Align the pins to the corresponding holes and push straight in. Do not push on the
middle of the sensor with your finger, as this may damage it. The sensor should fit
flush against the printed circuit board.
Note:
Each sensor socket is labeled to guide you in placing the correct sensor into
it. If a sensor does not seem to fit, examine it to ensure that it is the correct sensor,
the pins are not bent, and that the pins are aligned to the holes.
8.
Press the sensors all the way into the socket.
Important!
Sensors are not interchangeable. Use only RAE Systems sensors, and
use only the sensor type specified for your QRAE II monitor. Use of non-RAE
Systems components will void the warranty and can compromise the safe
performance of this product.
9.
Inspect the internal filter (QRAE II diffusion model only). If it is dirty, discolored,
or wet, replace it. See Replacing The Filter, below.
H
2
S Sensor
LEL Sensor
CO Sensor
O
2
Sensor
