Detcon CX-DM - Manual (Page 15)

Model CX-DM
NOTE
The wind guard must be used during calibration with the integral cal port to ensure proper
calibration.
2. Remove test gas and calibration adapter. The ITM display should return to a reading of 20.9%.
Initial operational tests are complete. CX-DM O
2
deficiency sensors are factory calibrated prior to shipment,
and should not require significant adjustment on start up. However, it is recommended that a complete
calibration test and adjustment be performed 16 to 24 hours after power-up. Refer to zero and span calibration
instructions in Section 3.3.
3. Operation
The operator interface of the CX Series gas sensors is accomplished with two internal magnetic switches
located to either side of the LED display (Figure 10). The two switches, labeled PGM1 and PGM2, allow for
complete calibration and configuration, eliminating the need for area de-classification or the use of hot
permits.
Figure 10 Magnetic Programming Tool
The magnetic programming tool (Figure 10) is used to operate the magnetic switches. Switch action is defined
as momentary contact (a swipe), a 3-second hold, and a 10-second hold. (Hold times are defined as the time
from the point when the arrow prompt appears. Swiping the magnet does not display the arrow prompt.) For
momentary contact use, the programming magnet is briefly held over a switch location, or swiped. For 3-
second hold, the programming magnet is held in place over the switch location for three seconds. For 10-
second hold, the programming magnet is held in place over the switch location for 10 seconds. The 3 and 10
second holds are generally used to enter calibration/program menus and save new data. The momentary
contact is generally used to move between menu items and to modify set-point values. Arrows (
◄ and ►) are
used on the LED display to indicate when the magnetic switches are activated. The location of PGM1 and
PGM2 are shown in Figure 11.
CX-DM Instruction Manual Rev. 1.3 Page 11 of 40