3.02
Connect test leads across the Protectowire side of the detection ckt. With the meter and adapter power on
If detection (initiating) circuit is a two wire Class B (NFPA Style A) start at the ZONE BOX which is the beginning
5.01
3.03
across the end of the Protectowire run, this would be in the ELR BOX for the two wire Class B CKT
the reading by X10.
(See Figure 3). For the Class A CKT place jumper across the two return loop wires in the ZONE BOX
4.01
4. CALIBRATION CHECK
of cable in that zone.
test circuit. To check the accuracy of the adapter
complete the following:
2. Turn power switch on.
gramed to measure feet or a count of 152
(See-Figure 4). Connect the meter at the start of the Protectowire cable run, meter will display the total length
all for (4) wires, the two going out to the detection loop and the two returning. Connect the meter test leads
DETERMINING PROTECTOWIRE CABLE RUN PER ZONE
1. Plug adapter into multimeter.
+ or - 3 if programed to measure meters.
wire run to the actuated point the location is at the same point on the Protectowire.
The actual length of Protectowire cable in a detection zone can be determined basically the same way as
finding the alarm point on the cable, as described in Para. 3.02. This is accomplished by placing a jumper
3. Turn calibration switch on, meter should read
a count of 500 + or - 5 if adapter is pro-
The ADAPTER is equipped with a calibration check/
across two wires going out. Meter will display location of the overheated point. Now connect the test leads
5. CALIBRATION PROCEDURE
HOW TO LOCATE THE HEAT ACTUATED POINT ON PROTECTOWIRE
If detection circuit is a four wire Class A (NFPA Style D) start at ZONE BOX (see figure 4) mark and disconnect
length of the Protectowire . Either way, from the start of the run to the actuated point or from the return of the
To calibrate the adapter complete the following:
1. Remove 2 screws from back of cover.
2. Remove top cover and slide front panel with
P.C. module and battery out of bottom cover.
3. Plug adapter P.C. module into multimeter as
would be done normally and turn on power
and calibration switches.
4. If adapter is programed to measure in feet
the meter will display the distance from the start of the Protectowire run to the actuated point. If the actuated
point is beyond a cable run that is greater than 1999 feet, switch the meter to the 2Vdc scale and multiply
of the Protectowire run. Disconnect at least one side (wire) of the detection circuit (See figure 3).
across two returning wires. Meter will display a second reading. Add the two readings and you will get the total
CAL.
ON
CHECK
OFF
PROTECTOWIRE
METER ADAPTER
COM. VOLTS
DS-8962
PLYMOUTH, MA 02360
ISSUE #1 MAY 90
MODEL APL-90
1. Remove 2 screws from back
ON
OFF
(See Figure 5)
2. Position Programing Micro
Jumper for the type of unit
of measurement required.
3. Check calibration.
(Reference Para. 5)
4. Replace cover and screws.
Take care when replacing
screws not to overtighten.
cover and remove top cover.
4.
6.01
P2 meters
Calibration
If incorrect reading is obtained use the mu-
6. SELECT UNIT OF MEASURE
or in Meters . To select the unit of measure complete the following.
ltimeter to test the 9V adapter battery before
attempting to calibrate (See para. 5).
position.
Programing
Micro Jumper
shown in Ft.
Page 2 of 2
feet
P1
Type 1604
9V Battery
FIGURE 5 COVER REMOVED SHOWING
PROGRAMING JUMPER AND CAL. POT.
Potentiometers
ALARM POINT LOCATOR
Connect to a digital meter with a
200 mV scale for X1 reading and
See manual for converting meas-
urement from feet to meters.
USE 9V NEDA Type 1604 Battery
a 2Vdc scale for X10 reading.
FIGURE 6 FRONT / LEGEND VIEW
positon shown in figure 5.
blade or smaller) to adjust potentiometer P1
count of 500 (feet).
6. If adapter is programed to measure meters
adjust potentiometer P2 so the multimeter
The adapter can be programed to measure the distance to the alarm point on the Protectowire in Feet
(See Figure 5) so the meter will display a
displays, a count of 152 (meters).
THE PROTECTOWIRE CO. INC.
OUTPUT = .1mV/Count Per Unit of
Measurement - Feet or Meters.
POWER
CAL. CHECK reading = 500 Feet
or 152 Meters.
5. To calibrate: Use a small screwdriver (1/8"
REV. B 10/1/07
the selectable micro jumper will be in the
