ARMs
Check jumpers.
SAMs
Check signal circuits for correct polarity.
Check for correct installation of EOL resistors.
Check jumpers.
STARTUP PROCEDURE
1.
Output loads that are controlled by the system
should be secured (remove power from all output
devices) to prevent actuation.
2.
Check all system wiring for proper connection.
3.
Before installing devices in the mounting racks,
inspect them to verify that they have not been
physically damaged in shipment. Check the rocker
switches for proper programming, then slide the
device fully into the mounting rack.
4.
Apply power to the system.
NOTE
To prevent the network modules from going into a
fault isolation condition, apply power to the LCU
prior to applying power to the network devices.
5.
Program the system for the desired operation using
Det-Tronics configuration software. Refer to
software manual, form number 95-8479-02.
Download configuration data to all devices.
NOTE
After system configuration has been completed,
the entire system should be tested for proper
operation to ensure that configuration was
performed properly.
6.
Calibrate the sensors.
7.
Ensure that all trouble and alarm conditions have
been cleared and the LCU reset, then remove
mechanical blocking devices (if used) and restore
power to the output loads.
CALIBRATION
To ensure optimum performance, calibration must be
performed on a regularly scheduled basis. Since each
application is different, the length of time between
regularly scheduled recalibrations can vary from one
installation to the next. In general, the more frequently a
system is checked, the greater the reliability.
IMPORTANT
4 to 20 ma devices not manufactured by Det-
Tronics must be pre-calibrated. To ensure
adequate protection, calibration must be performed
on a regularly scheduled basis.
NOTE
The calibration will be aborted and the detector will
revert back to the previous calibration values if the
calibration is not completed within 12 minutes. The
red LED will blink. The calibration will be logged
as aborted.
NOTE
The “Sensor Replacement” calibration procedure
must be used for the initial calibration of a new
sensor. The “Routine Calibration” procedure can
then be used for all subsequent calibrations.
NOTE
Some calibration procedures require the operator
to activate the reed switch located on a circuit
board inside the junction box. See Figure IX-1 for
the location of the reed switch. To activate the
reed switch, hold the calibration magnet against
the side of the junction box near the switch location
approximately one inch above the mounting
surface. (Do not open the junction box.) Hold the
calibration magnet in place for about 4 seconds to
initiate steps of the calibration procedure.
CALIBRATION ALGORITHM A
FOR MANUAL CALIBRATION OF UNIVERSAL DCU
Normal Calibration
1.
Activate the reed switch. The red LED blinks at a 2
Hz rate while the reed switch is closed.
2.
After the reed switch has been closed for 3
seconds, the calibrate LED on the communication
module flashes at a 1 Hz rate, indicating that it is
ready for the zero input.
3.
Apply the zero input (4 ma).
IX-2
