Detcon DM-700 - Manual (Page 19)

Model DM-700
DM-700 Instruction Manual Rev. 4.0 Page 15 of 48
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
PGM1/2 (M)
Raw Current XXX
Gain Setting XXX
Voltage XX.X VDC
Sensor Temp XX C
Bias Voltage XX.XX
Output sign XXX
mA Output XX.XX
AutoSpan @ XX
Sensor Life XXX%
Last Cal XX Days
PGM2 (10)
PGM1/2 (3)
Simulation
AutoZero PGM1 (3)
PGM2 (10)
PGM2 (3)
Gas Type XXX
Version X.XX
Range XXX ppm
Serial ID XX
inc
Auto Time-Out
View Sensor Status
PGM1/2 (3)
PGM1/2 (M)
Model Type
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
Auto Time-Out
Signal Output Check
##
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
Set AutoSpan Level
AutoSpan
Normal Operation
PGM1 (3)
PGM1/2 (M)
Defaults Restored
PGM1/2 (3)
Auto Time-Out Auto Time-Out
Restore Defaults
Auto Time-Out
inc PGM2 (S)
PGM1/2 (3)
PGM1 (S)
##
PGM1/2 (3)
PGM1/2 (M)
Set Serial ID
dec
inc
PGM1/2 (3)
PGM1 (S)
PGM2 (S)
##
dec
PGM1/2 (3)
PGM1/2 (M)
Set Range
Figure 13 DM-700 Software Flowchart
3.3 Normal Operation
In normal operation, the ITM Display continuously shows the current sensor reading, which will normally
appear as “ 0 ”. Once every 60 seconds the LED display will flash the sensor’s measurement units and gas
type (i.e. ppm H
2
S). If the sensor is actively experiencing any diagnostic faults, a “Fault Detected” message
will scroll across the display on the ITM display once every minute instead of the units of measure and the gas
type. At any time, while the sensor is in “Fault Detected” mode, PGM1 or PGM2 can be swiped to prompt the
sensor to display a list of the active faults.
In normal operation, the 4-20mA current output linearity corresponds with the full-scale range. The RS-485
Modbus™ serial output provides the current gas reading and complete fault status on a continuous basis when
polled by the master device.