Detcon TP-624D - Manual (Page 26)

Model TP-624D
TP-624D Instruction Manual Rev. 0.4 Page 22 of 40
to scroll “Setting Heater”). After scrolling “Setting Heater”, the sensor will adjust the Heater power. The
sequence should require about 2-minutes. When the cycle is complete, the display will revert to the “Set
Heater Power” text scroll.
NOTE: If the sensor cannot adjust the heater power within 3 minutes an error message, “Can’t
set, Reverting to Default”, will be scrolled. Refer to section 6 Troubleshooting Guide.
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 Heater Power” 4 times and then return to Normal
Operation).
The current values for heater power and heater voltage can be observed in the “View Sensor Status” menu.
The target heater power setting at 25C operating temperature is 240 ± 5mW. At the operating temperature
extremes the observed heater power settings will vary according to the data below:
50C normal heater power range is 210 ± 5mW
0C normal heater power range is 260 ± 5mW
-20C normal heater power range is 275 ± 5mW
-40C normal heater power range is 290 ± 5mW
3.5.5 Signal Output Check
Signal Output Check provides a simulated 4-20mA and 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 value of the Modbus concentration register (40002) will also be
increased and decreased in the same manner.
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
revert to factory default values. This may be required if the settings have been configured improperly and a
known reference point needs to be re-established to correct the problem.
This menu item appears as: “Restore Defaults”.
NOTE: “Restoring Factory Defaults” should only be used when absolutely necessary. All