Detcon CX-DM - Manual (Page 9)

Model CX-DM
Additional Placement Considerations
The sensor should not be positioned where it might be sprayed or coated with surface contaminating
substances. Painting sensor assemblies is prohibited.
Although the sensor is designed to be RFI resistant, it should not be mounted in close proximity to high-
powered radio transmitters or similar RFI generating equipment.
When possible mount in an area void of high wind, accumulating dust, rain, splashing from hose spray, direct
steam releases, and continuous vibration. If the sensor cannot be mounted away from potentially damaging
conditions then use the Detcon
ꞌs Harsh Location Dust Guard accessory.
Do not mount in locations where temperatures will exceed the operating temperature limits of the sensor. Use
a sunshade to maintain correct operating temperature if mounted in direct sun light.
2.3 Sensor Contaminants and Interference
Electrochemical toxic gas may be adversely affected by exposure to other airborne gases. Depending on the
cross-sensitivity relationship, there may be a false high or false low reading. The most common gases that may
cause interference are referenced in Section 8.3 (Table 4 and Table 5).
Cross-Interference Data Table
Gases typ
ically found in industrial environments that may cause interference with Detconꞌs toxic gas sensors
are listed in Section 8.3, Table 5. To effectively reference the table; locate the chosen gas, scan across the row
for possible interference gases, and then determine the magnitude of cross-interference that may occur.
2.4 Sensor Mounting
Vertically position the CX-DM so the sensor points straight down. The explosion-proof enclosure or junction
box is typically mounted on a wall or pole. Detcon provides a selection of standard junction boxes in
aluminum and stainless steel.
NOTE
If wall mounting without a mounting plate, make sure to use at least
1
/
2
" spacers underneath
the aluminum junction boxes 1 /
4
" mounting holes to move the sensor assembly away from
the wall and to allow access to the sensor assembly.
NOTE
Metal-on-metal contact must be maintained to provide a solid electrical ground path. Only
use Teflon Tape or other pipe thread material on the
3
/
4
" threads if the sensor is mounted in
a severe or harsh environment. If Teflon Tape is used the Sensor must be externally
grounded using a ground strap.
When mounting on a pole, secure the junction box to a suitable mounting plate and attach the mounting plate
to the pole using U-Bolts. (Pole-Mounting brackets for Detcon junction boxes are available separately.)
CX-DM Instruction Manual Rev. 1.3 Page 5 of 40