Model CXT-DM
CXT-DM Instruction Manual
Rev. 2.0
Page 20 of 54
Software Flowchart
dec
LEGEND:
PGM1 - Program Switch Location #1
PGM2 - Program Switch Location #2
(S) - Momentary Swipe
(M) - Momentary hold of Magnet during text
scroll until the ">" appears, then release
(3) - 3 second hold from ">" prompt
(10) - 10 second hold from ">" prompt
Auto Time-out - 5 seconds
inc - Increase
dec - Decrease
#, ##, ### - numeric values
Serial N. ##.##.##
Temperature ##C
RF Channel ##
AutoZero
PGM1 (3)
PGM2 (10)
PGM2 (3)
RF App ##.##.##
CP App ##.##
RF SW ##.##
Modbus ID ####
inc
Auto Time-Out
View Sensor Status
PGM1/2 (3)
PGM1/2 (M)
MP App ##.##
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
##
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
Set Detection Range
AutoSpan
Normal Operation
PGM1 (3)
Auto Time-Out
Auto Time-Out
inc
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
##
PGM1/2 (3)
PGM1/2 (M)
dec
PGM1/2 (3)
Bump Test Started
PGM1/2 (3)
PGM1/2 (M)
Bump Test
dec
inc
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
##
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
Set RF Channel
Set Autospan Level
Network ID ##
Range ###
Last Cal ## Days
Sensor Life ###%
2 minute timeout
Alarm 2
Alarm 1
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
Alarm Settings
inc
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
##
Alarm 1 Level
Y/N
Alarm 1 Ascending
Y/N
Alarm 1 Latching
Y/N
Alarm 1 Energized
dec
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
inc
inc
inc
inc
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
##
Alarm 2 Level
Y/N
Alarm 2 Ascending
Y/N
Alarm 2 Latching
Y/N
Alarm 2 Energized
dec
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
inc
inc
inc
Auto Time-Out
inc
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
##
PGM1/2 (3)
PGM1/2 (M)
Set Modbus ID
dec
PGM1/2 (M)
Defaults Restored
PGM1/2 (3)
Restore Defaults
Auto Time-Out
Figure 17 Menu Flow Chart
3.2
Normal Operation
In normal operation, the ITM Display will be blank and will display the gas reading once every 10 seconds for
about 2 seconds (normally appear as “0”). At any time swiping a magnet across either PGM1 or PGM2 will
cause the ITM to display the range and gas type (i.e. “ppm H2S”). If the sensor is actively experiencing any
diagnostic faults, a swipe of the magnet will cause the display to scroll the fault condition. Refer to Section 5
Service and Maintenance for more information on fault conditions.
3.3
Calibration Mode
Zero and span calibration should be performed on a routine basis (quarterly minimum is advised) to ensure
reliable performance. If a sensor has been exposed to any de-sensitizing gases, or to very high over-range
combustible gas levels, re-calibration should be considered. Unless otherwise specified, span adjustment is
recommended at 50% of the full scale range.