Detcon DM-700 - Manual (Page 26)

Model DM-700
DM-700 Instruction Manual Rev. 4.0 Page 22 of 48
From the “Set Range” text scroll, hold the programming magnet over PGM1 or PGM2 until the “ ” prompt
appears and continue to hold the magnet in place for an additional 3-4 seconds (until the display starts to scroll
“Set Range”). The display will then switch to “XXX“(where XXX is the current Range). Swipe the magnet
momentarily over PGM2 to increase or PGM1 to decrease the range Level until the desired range is displayed.
Hold the magnet over PGM1 or PGM2 for 3 seconds to accept the new value. The display will scroll “Range
Saved”, and revert to “Set Range” text scroll.
Selectable ranges are:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100
150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000
2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10,000
The range can only be changed to a new range that is between 4 times greater or 4 times less than that of the
current plug-in sensor. I.E. For a plug-in sensor of 100ppm, the range can be set as low as 25ppm or as high as
400ppm.
Move to another menu item by executing a momentary hold, or, return to Normal Operation via automatic
timeout of about 15 seconds (the display will scroll “Set Range” 4 times and then return to Normal Operation).
NOTE1: The sensor should be re-calibrated after any change is made to the sensor range.
AutoSpan and AutoZero should be re-established.
NOTE2: When a new plug-in sensor is installed, the ITM will automatically default to the
range of the plug-in sensor.
3.5.5 Signal Output Check
Signal Output Check provides a simulated 4-20mA output and RS-485 Modbus™ output. This simulation
allows the user to conveniently perform a functional system check of their entire safety system. This signal
output simulation also aids the user in performing troubleshooting of signal wiring problems.
The menu item appears as: “Signal Output Check”.
From the “Signal Output Check” text scroll, hold the magnet over PGM1 or PGM2 until the “ ” prompt
appears and then hold continuously for an additional 10 seconds. Once initiated, the display will scroll
“Simulation Active” until the function is stopped. During simulation mode, the 4-20mA value will be
increased from 4.0mA to 20.0mA (in 1% of range increments at about a 1 second update rate) and then
decreased from 20.0mA to 4.0mA. The same simulation sequence is applied to the Modbus™ output gas
reading.
NOTE: Signal Output Check stays active indefinitely until the user stops the function. There
is no automatic timeout for this feature.
To end simulation mode, hold magnet over PGM1 or PGM2 for 3 seconds. The display will either move to the
prior menu item or move to the next menu item respectively.
Move to another menu item by executing a momentary hold, or, return to Normal Operation via automatic
timeout of about 15 seconds.
3.5.6 Restore Factory Defaults
Restore Factory Defaults is used to clear current user configuration and calibration data from memory and