Detcon CXT-DM - Manual (Page 20)

Model CXT-DM
3. Operation
The Operator Interface of the Model CXT Series gas sensors is accomplished via two internal magnetic
switches located to either side of the LED display (see Figure 15). The two switches, labeled “PGM1” and
“PGM2”, allow for complete calibration and configuration, thereby eliminating the need for area de-
classification or the use of hot permits.
Figure 14 Magnetic Programming Tool
The magnetic programming tool (Figure 14) 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 ““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 15.
Figure 15 Magnetic Programming Switches
NOTE: While in the Program Mode, if there is no magnetic switch interaction after 4
consecutive menu scrolls, the sensor will automatically revert to normal operating condition.
While changing values inside menu items, if there is no magnet activity after 3-4 seconds
the sensor will revert to the menu scroll. If the sensor is in Bump Test mode, the display will
remain active.
Program Switch #1
LED Display
Program Switch #2
PGM2
SPAN
PGM1
ZERO
MODEL
CXT-DM
detcon inc.
H 2 S Sensor
CXT-DM Instruction Manual Rev. 1.6 Page 16 of 52