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Option “A” - PDM-1000-2
Protectowire Alarm Point Location Meter
DESCRIPTION:
The PDM-1000-2 PROTECTOWIRE Digital Alarm Point Location Meter is
designed to help locate a heat actuated point on a PROTECTOWIRE linear heat
detector circuit. This meter identifies the distance in feet or meters (preset at the fac-
tory) along the detector from the start of the run to the actuated point.
Note:
The
PDM-1000-2 is calibrated at the factory and only requires adjustment to compensate
for field cable resistance at the time of installation.
Note:
The Protectowire Alarm Point Location Meter is also available in a vertical
housing configuration
(PDM-1000-3)
. This meter is identical to the PDM-1000-2
with the exception of orientation an allows flexibility for larger battery sizes.
OPERATION:
When an alarm signal is received at the main control panel, depress the meter switch (see illustra-
tion below) of the zone in alarm (indicated by the lighted red LED). The meter will then display
the distance to the actuated portion of the PROTECTOWIRE linear heat detector circuit.
CALIBRATION:
The copper feed wire between the control panel and the zone (junction) box at the start of the
PROTECTOWIRE run has an inherent resistance. This resistance although small compared to
that of the PROTECTOWIRE, will introduce an error in the digital meter reading. The longer the
feed wire, the greater the error . Adjust the meter per the following procedure to compensate for
field wiring resistance.
1. Disconnect all alarm and/or releasing devices connected to the control panel and apply
power to the system before proceeding.
2. Connect a jumper wire across the detection circuit at the beginning of the PROTEC-
TOWIRE run (at the zone box).
Caution:
This will trip the detection circuit into an alarm
condition.
3. At the control panel press the meter read switch on the zone card module for the appropriate
zone in alarm. The meter will display the feed cable error.
4. To cancel out (zero) this value, adjust the corresponding MP# potentiometer on the main or
expander boards for the zone in alarm by using a small screwdriver to turn the potentiometer
until the meter reads zero. (See below)
Note:
the positive (+) and negative (-) indicator will fluctuate when zeroed.
5. Repeat this procedure for all other zones containing PROTECTOWIRE linear heat detector.
Note:
The PROTECTOWIRE digital meter is designed for reading lengths of PROTECTOWIRE linear
heat detector cable installed at an ambient temperature of 70º F . Since the inner conductors of
PROTECTOWIRE consist of two steel wires, the inherent cable resistance is subject to change
proportionally to temperature. For each 10º F change in temperature a 1% change in total measure
cable length can be expected. Using #14AWG or larger copper feed wire in detection circuits that
have PROTECTOWIRE will minimize meter reading error.
ZONE
DISPLA
Y
PDM-1000-2
PDM-1000-3
FIELD ADJUSTMENT
FOR MB-91AM (MAIN BOARD)
FIELD ADJUSTMENT
FOR EB-91AM (EXPANDER BOARD)
TOP HALF OF BOARD
FIELD ADJUSTMENT
FOR EB-91AM (EXPANDER BOARD)
BOTTOM HALF OF BOARD
Summary of Contents for 2000 FireSystem
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