Simplex 2098-9650 Manual

.
S@Simplex
Projected Beam
Smoke Detector
Model 2098-9650 9
Installation/Operating Instructions
0 1990 Simplex Ttme Recorder Co., Gardner, Mass. 01441-0001 U.S.A.
All specifications and other information shown were current as of publication. and are subject to change without notice.
PER-21-011 (574-653)
Ed590
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TABLE OF CONTENTS
Page
Overview .................................................................................................................................................... .............. 1
Major Functions ....................................................................................................................................................... 2
Installation and Example ......................................................................................................................................... 3
Names of Parts ......................................................................................................................................... .............. 4
Installation Procedure
Mounting the Transmitter or Receiver Base ...................................................................................................... 5
If Using a 2098-9802 Ceiling Mount Assembly .............................................................................................. 5
If Using a 2098-9801 Wall Mount Assembly .................................................................................................. 5
If Using a 2098-9748 4” Square Box Adapter Assembly ............................................................................... 6
Mounting the Transmitter or Receiver Body ...................................................................................................... 6
Terminal Layouts ..................................................................................................................................................... 7
Wiring Connections ................................................................................................................................................. 8
Adjustment Procedure ........................................................................................................................................... 10
Operating Instructions ........................................................................................................................................... 12
Maintenance .......................................................................................................................................................... 13
Specifications ....................................................................................................................... .:............................... 14
Troubleshooting ..................................................................................................................................................... 16
Appendix: Sensitivity Selection ............................................................................................................................. 17
IMPORTANT
Familiarize yourself with the information in this manual before installing,
adjusting, or servicing Simplex Model 2098-9650 Projected Beam Smoke
Detectors.
THE MATERIAL IN THIS MANUAL COVERS ALL ASPECTS OF 2098-
9650 INSTALLATION, SERVICE AND OPERATION. KEEP THIS MANUAL
HANDY. IT CONTAINS INFORMATION UNAVAILABLE ELSEWHERE.
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General Description
OVERVIEW
The Simplex Model 2098-9650 Projected Beam Smoke Detector consists of a transmitter and a receiver mounted
apart from one another. The transmitter continually emits pulsed beams in the near infrared wavelength; the
receiver continually monitors these beams for quantity (brightness).
Should smoke obscure the near infrared beams seen by the receiver, circuitry within the receiver will react to the
reduced beam quantity by initiating an alarm.
Since the receiver continually monitors the linear space between itself and the transmitter for smoke, the 2098-
9650 is capable of detecting the presence of a smoke-generating fire - even when the air around both the
transmitter and the receiver remains smoke-free.
The receiver can be adjusted so that 15, 20, 30, 40, 50, 60 or 70% of the near infrared beam must be obscured
before the 2098-9650 initiates an alarm. This allows a 2098-9650 to monitor as little as 32 linear feet or as much
as 328 linear feet for smoke.
Operating Principle
Pulsed beams in the near infrared wavelength leave the detector’s transmitter and enter the photo-diode of the
detector’s receiver. The resultant (analog) signals are then amplified, converted to digital information, and entered
into a microprocessor.
Upon entering the microprocessor, the value of the just-entered information and a reference value (the detector’s
“initial beam data”) are compared against each other. If the value of the just-entered signal is less than 10% of
the reference value, the detector issues a trouble signal; if the value of the just-entered signal is more than 10%
of the reference value but less than the obscuration value (85, 80, 70, 60, 50, 40 or 30% of the reference value),
the detector initiates an alarm; and if the value of the just-entered signal is more than the value of the detector’s
obscuration adjustment value, the detector operates normally (issues no signals).
The microprocessor automatically compensates for up to 1% of optical degradation per hour. However, should the
detector’s lenses become excessively dirty, a preset “compensation threshold” will be exceeded and a trouble
signal will result.
Principle of Operation
- FIRE SIGNAL
SIGNAL CONVERTER _
A-D CONVERT MICROPROCESSOR TROUBLE SIGNAL
RECEIVER
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MAJOR FUNCTIONS
Fire Signal Output and Indication
Within one minute after smoke obscures the near infrared beam by more than the detector’s preset sensitivity level
(85, 80, 70, 60, 50, 40 or 30% of the reference level), the 2098-9650 initiates an alarm signal and, at the same
time, illuminates the red FIRE LED on its receiver.
Trouble Signal Output and Indication
a. If the quantity-of-beams setting at the initial time of operation is improper or if the quantity-of-beams
compensating capacity exceeds its limit, the 2098-9650 issues a trouble signal immediately and, at the same
time, illuminates the amber TROUBLE LED on its receiver.
b. If the quantity of beams suddenly decreases by 90% or more, the 2098-9650 issues a trouble signal within 30
seconds and, at the same time, illuminates the amber TROUBLE LED on its receiver. ..
Monitor Condition Indication
Both the transmitter and the receiver indicate they are powered up and operating normally when their MONITOR
(green) LEDs pulse.
Signal Output
A Form A contact transfers (closes) when the detector goes into alarm; a Form B contact transfers (opens) when
the detector goes into trouble. In addition, two dry Form A contacts are provided for remote annunciation: one
closes when the detector goes into alarm, the other closes when the detector goes into trouble, and both close
when the detector is tested via the remote LED/test switch described below.
Remote Operation
An optional 2098-9803 Remote LED/Test Switch, mounted apart from the 2098-9650, allows the detector to be
tested from a remote location.
l See Wiring Connections (pages 8 and 9).
Sensitivity Setting
The 2098-9650 can be adjusted to initiate an alarm when smoke obscures 15, 20, 30, 40, 50, 60 or 70% of the
near infrared beam normally seen by the receiver.
Adjustment of Optical Axis and Quantity of Photo-signals
A monitor plug (provided) allows the installer to use a microammeter to “fine adjust” the detector.
Automatic Compensation for Quantity of Photo-signals
The detector automatically compensates for a change in photo-signal quantity of up to 1% per hour. The
compensation range extends from +20% to -50% of the initial beam data. Should the compensating range
exceed either of the above limits, the detector issues a trouble signal.
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INSTALLATION AND EXAMPLE
Applicable Sites
The 2098-9650 is applicable to such large or potentially hazardous places as:
l Gymnasiums, lecture halls and theaters
l Workshops, warehouses and garages
l Underground streets and tunnels
l Substations and electrical rooms
Note: To protect areas where flammable liquids are stored, Simplex suggests that spot-type fire and smoke
detectors be installed in addition to a Model 2098-9650.
Installation Standard
See Section 4-l to 4-5 of NFPA 72E.
Precautions
l The linear space separating the detector’s transmitter from its receiver must be obstacle-free.
l Both the transmitter and receiver should be mounted where they can be easily accessed for maintenance.
l Mount both the transmitter and the receiver in positions where they are unlikely to be struck by moving objects.
l Mount the detector’s receiver near the control panel.
l The receiver’s optics must be kept out of direct sunlight.
l The detector’s optical axis must be at least 24 inches away from any obstacle.
Installation Example
32-328 FT.
(lo-100M) -
TRANSMITTER RECEIVER
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NAMES OF PARTS
TRANSMITTER
RECEIVER
BASE
MONITOR LED (GREEN)
LENS COVER SIGHT HOLE
BODY
FIRE LED (RED)
MONITOR LED (GREEN)
TROUBLE LED (AMBER)
BASE
OPTICAL AXIS CLAMP
CONNECTING FIXTURE
CHAIN
HOOK
MONITOR COVER
COVER SETSCREW
LENS COVER f SIGHT HOLE
OUTPUT CONTROL
FINE ADJUSTMENT
COARSE ADJUSTMENT
SENSITIVITY SELECT SWITCH MONITOR COVER
INSIDE OF RECEIVER COVER
COVER SETSCREW
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INSTALLATION PROCEDURE
Mounting the Transmitter or Receiver Base
Using the wrench provided, unscrew the connecting fixture from the transmitter or receiver body. Then separate
the body from the base by pulling them apart and:
If Using a 2098-9802 Ceiling Mount Assembly
BACK BOX WITH 112” THREADED HOLE IN BOX COVER
(NOT INCLUDED)
NUT
CONNECTING BASE- ,ADAPl ‘OR
If Using a 2098-9801 Wall Mount Assembly
CONDUIT THREAD -
ADAPT TO STANDARD
ELECTRICAL BOX
ADAPTER
SUPPORT
ARM
1. Obtain a back box cover that contains a hole
threaded to accommodate l/2” NPT pipe.
2.
3.
Screw the half-inch pipe into the threaded hole.
Assemble the nut and the base-adaptor on the
half-inch pipe as shown.
4. Pull the detector base’s wiring cable through the
%” pipe. Then securely attach the base of the
beam detector to the base-adaptor with the 8/32” x
l/2” screws provided.
5. Wire the detector base into the fire alarm system
6.
7.
(see pages 8 and 9).
Attach the back box cover to the back box.
Mount the transmitter or receiver body (see
we). next
1. Screw the nut and the adaptor plate onto the
support arm.
2. Pull the detector base’s wiring cable through the
support arm. Then, using the 8/32 x l/2” screws
provided, securely attach the detector’s base to the
adaptor plate.
3. Secure the other end of the support arm to a (wall
mounted) fire alarm circuit junction box. Then,
using appropriate fasteners (not provided), attach
the wall-mount bracket to the wall.
4. Wire the detector base into the fire alarm system
(see pages 8 and 9).
5. Position the support arm perpendicular to the wall.
Then, using the allen screw provided, lock the
support arm in place.
6. Using the 8/32 x l/4” screw provided, attach the
cover to the wall-mount bracket.
7.
5
Mount the transmitter or receiver body (see next
Paw).
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4” SQUARE BACK BOX
(NOT’INCLUDED)
1.
\ 2.
Note: The 2098-9748 is a six-inch round plate that
If Using a 2098-9748 4” Square Box Adaptor Assembly
allows a beam detector to be mounted directly
to a 4” square box.
Attach the base of the beam detector to the
adaptor plate with the 8/32 x l/2” screws provided.
Wire the detector base into the fire alarm system
(see pages 8 and 9).
3. Attach the adaptor to the box with the 8/32 x 1 3/8”
screws provided.
4. Mount the transmitter or receiver body (see below).
Mounting the Transmitter or Receiver Body
1. Align the register mark on the body with that on the base as shown. Then plug the body straight into the base.
Inserting the detector with the register marks of the
connectors improperly set together or obliquely to the
base can damage the connectors.
OPTICAL AXIS CLAMP
-CONNECTING FIXTURE
,BODY SAFETY CHAIN
SAFETY CHAIN
0
INSERTING
0
INSERTING
SET FOR THE SAME DIRECTION.
BASE CONNECTOR
(SOCKET) DETECTOR CONNECTOR
(PLUG)
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2. Screw the connecting fixture onto the detector body. Then, using the wrench provided, tighten - but do not
overtighten - its threads.
3. Loosen the optical axis clamp just enough to allow the base to be readily turned. Then (1) point the detector’s
lens at its associated transmitter or receiver and (2) hand-tighten the clamp.
4. Connect the safety chain to the hook on the detector’s body.
TERMINAL LAYOUTS (TOP VIEW)
Transmitter
POWER LINES FOR
‘(NO POLARITY) RECEIVER
Note: Black circles indicate free terminals.
Receiver
REMOTE TROUBLE SIG. (N/O) BROWN - / VIOLET REMOTE FIRE SIG. (N/O)
REMOTE SIG. COMMON LINE
(TROUBLE, FIRE REMOTE) PINK\ )rJI
TEST YELLOW 4
GREEN TROUBLE SIG. (NI
GREEN
POWER LINES rBLUE Y GRAY
GRAY FIRE SIG. (N/O)
FOR EMITTER
----~ J
COMMON LINE
FOR TEST
‘C)
POWER LINES + 24V
NOTES
1. The fire signal, trouble signal, remote fire signal and remote trouble signal outputs are all provided by contacts
rated at 24VDC, 0.5A.
2. The pink lead represents common for both the remote fire signal and the remote trouble signal.
3. Cap all unused terminal leads with electrical tape or wire nuts.
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WIRING CONNECTIONS
4-Wire System
OPTIONAL
REMOTE L.E.D./
TEST SWITCH
OPTIONAL
2098-9803
ALL” CLOSED)
I I
I I I
I
I I
CONTROL PANEL
(WITH FAULT INDICATOR)
NEXT DETECTORS
BASIC CONNECTION
1F : FIRE SIGNAL CONTACT (NORMALLY OPEN)
_____---- O,,T,O,, 1T : TROUBLE SIGNAL CONTACT (NORMALLY CLOSED)
2F : REMOTE FIRE SIGNAL CONTACT (NORMALLY OPEN)
2T : REMOTE TROUBLE SIGNAL RELAY CONTACT (NORMALLY OPEN)
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AC
i ’
I ’
I 1
I I
,------/
:
I
<PyK \
1
I
I
_-J OPTIONAL
2098-9803
RF -7MOTE L.E.D./
TE!ST SWITCH
NEXT DETECTORS
ORANGE I ORANGE
GRAY I GRAY
RED r RED
1 r
WHITE I WHITE. r
I
I
GREEN c I
GREEN (
I I
RECEIVER
ORANGE -----7
END-OF-LINE,RELAY
(NORMALLY CLOSED)
2098-9739
OR
I
GREEN
2098-9735
BLUE. BLUE
‘I u SW’TCH RECEIVER
-J OPT,ONAL
2098-9803
REMOTE L.E.D.)
TEST SWITCH
EMITTER EMITTER
BASIC CONNECTION
-------OPTION
Notes
1. When wired as shown, a (detector) trouble signal takes the form an initiating device circuit trouble at the control
panel.
2. The 24VDC supplied to the detector must meet the following requirements:
a. Supply voltage regulation : 19.2 to 33V
b. Ripple :30% or less
3. The optional 2098-9803 Remote LED/Test Switch allows the detector to be monitored and tested from a remote
location.
If used, the 2098-9803 Remote LED/Test Switch should be installed below the detector’s receiver.
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ADJUSTMENT PROCEDURE
Optical Axis Adjustment
Note:
You must first “coarse adjust’and then “fine adjust” each detector.
Coarse Adjustment (Adjustment Using the Sight Hole)
1. Loosen the transmitter’s optical axis clamp.
2. While looking through the transmitter’s sight holes, move the transmitter’s body as required to center the
associated receiver in the sights.
SIGHT HOLES
3. Hand-tighten the optical axis clamp.
l The clamp will be fully tightened during a later step.
4. Coarse adjust the receiver as described in steps 1through 3. w
ASSOCIATED EMITTER OR RECEIVER
Fine Adjustment (Adjustment Using the Monitor Output)
Note: See illustration on next page.
1. Open the monitor cover (found on the back of the receiver).
l The cover’s left-hand screw must be removed; the cover’s right-hand screw need only be loosened (it cannot
be removed).
2. Check to see that the red LED inside the SET switch is pulsing.
3. Set the SENSITIVITY SELECT switch to OFF.
4. Insert the monitor plug (provided) into the monitor jack, and connect it to a DC microammeter.
l The ammeter must have an internal resistance of 1K to 1OKohms per volt, and must be set for its 50 uA range.
5. Using the COARSE ADJUSTMENT and FINE ADJUSTMENT output control knobs, adjust the monitor to obtain
a reading of about 15 uA (this reading is notcritical).
l Output control adjustments:
Clockwise ~:Higher output
Counterclockwise :Lower output
l Turn the output control knobs slowly. A quick turn can cause idling.
l Never turn an output control knobs more than 3/4th turn.
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6. Manually align both the transmitter and the
receiver bases to obtain maximum output. Then
lock both devices in place by securely tightening
OUTPUT CONTROL
FINE ADJUSTMENT
OPTICAL AXIS CLAMP
CONNECTING PlXT”RE
their optical axis clamps and connecting fixtures.
l If, during step 6, you find the monitor output
SELECT SWITCH MONlTOR COVER
COVER SETSCREW
exceeding 30 uA (saturated value), use the
(CONTAINING MONITOR LEG)
output controls to reduce the output to about 15
uA. Then finish doing step 6.
MONITOR JACK
Quantity-of-Beams Adjustment and Sensitivity Selection
After completing the “fine adjustment” procedure (see above):
1. Using first the COARSE ADJUSTMENT and then the FINE ADJUSTMENT output controls, set monitor output
to between 17 and 22 uA.
2. Set the SENSITIVITY SELECT switch to its optimum sensitivity position (see page 17).
3. Momentarily press the SET switch. Then wait 20 seconds.
l If the detector issues a trouble signal during the 20 second wait, turn the SENSITIVITY SELECT switch OFF
and repeat steps 1,2 and 3 above.
4. Remove the plug from the monitor jack, close the monitor cover, and securely tighten the cover’s screws.
Operation Check
Using appropriate test filters (from the 553-509 Test Filter Kit), check detector operation (see Operational Test and
Non-operational Test on page 13).
Precautions
1. The SENSITIVITY SELECT switch must be turned OFF throughout the optical axis adjustment and at the start
of the quantity-of-beams adjustment. The switch must, however, be set to its 75, 20, 30, 40, 50, 60 or 70%
position at all other times.
l The detector cannot initiate alarms or issue trouble signals with its SENSITIVITY SELECT switch turned
OFF.
2. Maximum monitor output is 35 uA.
3. When the red MONITOR LED starts flashing following initial power up, immediately start “optical axis,“
“quantity-of-beams” and “sensitivity selection” adjustments.
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Note: The lengths of time required before the detector reaches its normal monitor condition are:
l At installation and adjustment
From power up to start of emission
From start of emission to press SET switch : Approx. 30 sets.
: As much time as is needed to adjust optical axis and
quantity-of-beams.
From press SET switch to start of normal monitor
condition : Approx. 10 sets.
c
START OF SET SENSITIVITY SELECT SWITCH,
POWER-UP EMISSION PRESS SET SWITCH.
I--.;1----~--~+~~x~;,
OPTICAL AXIS ADJUSTMENT, APPROX. 10 SECS
QUANTITY-OF-BEAMS ADJUSTMENT
l After installation
Following an extended (30 minute or longer) power outage, the detector automatically reaches normal monitor
condition as follows:
From power up to start of emission : Approx. 30 sets. after end of power outage
From start of emission to auto SET : Approx. 90 sets. after start of emission
From auto SET to start of normal monitor condition : Approx. 10 sets. after auto SET
START OF
POWER-UP EMISSION
- ---
NORMAL MONITOR \
APPROX. 90 SECS CONiIITION ;
,
B-B/
OPERATING INSTRUCTIONS
To Manually Update the Detector’s Initial Beam Setting
1. Place the receiver’s SENSITIVITY SELECT switch in its optimum sensitivity position (see page 17).
2. Momentarily press the SET switch.
Restoration Procedure Following a Detector Alarm Indication
After confirming that smoke is no longer present, reset the fire alarm system from the fire alarm panel.
l If the detector goes back into alarm:
1. Turn the receiver’s SENSITIVITY SELECT switch OFF. Then clean the transmitter and receiver lens
covers.
l Be sure to (a) return the SENSITIVITY SELECT switch to its optimum sensitivity position and then (b)
press the SET switch after cleaning the lens covers.
2. Reset the system from the fire alarm panel.
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Restoration Procedure Following a Detector Trouble Indication
Proceed as follows until the trouble indication clears:
1. Check to see that the beam is unobstructed.
2. Check and, if necessary, coarse adjust the detector’s optical axis (see page 10).
3. Turn the receiver’s SENSITIVITY SELECT switch OFF. Then clean the transmitter and receiver lens covers.
l Be sure to (a) return the SENSITIVITY SELECT switch to its optimum sensitivity position and then (b) press
the SET switch after cleaning the lens covers.
4. Check and, if necessary, fine adjust the detector’s optical axis (see page 10).
l Be sure to (a) return the SENSITIVITY SELECT switch to its optimum sensitivity position and then (b) press
the SET switch after checking this adjustment.
MAINTENANCE
The detector should be checked and serviced every six months as follows:
1. Visual Check
A. Turn the receiver’s SENSITIVITY SELECT switch OFF. Then, using a soft cloth, clean the transmitter and
receiver lens covers.
B. Check for loose connections between the base and the detector body.
C. Check the chain and hook connection.
D. Check the optical axis for deviation by looking through the sight holes.
2. Functional Check
A. Check to see that the monitor output is in the 17 to 22 uA range (see Fine Adjustment on page 10).
l Be sure (a) to return the SENSITIVITY SELECT switch back to its optimum sensitivity position and then
(b) press the SET switch after making this check.
B. Perform operational, non-operational and light blocking tests.
l Operational Test
Hold the appropriate “operation” test filter from a Simplex Beam Detector Test Filter Kit (553-509) in
front of the detector’s receiver for one minute.
The FIRE (red) LED must illuminate and a fire signal must be transmitted by the end of this test.
l Non-operational Test
Reset the system. Then hold the appropriate “non-operation” test filter from a Simplex Beam Detector
Test Filter Kit (553-509) in front of the detector’s receiver for one minute.
The FIRE (red) LED must NOT illuminate and a fire signal must NOT be transmitted during this test.
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l Light Blocking Test
Hold filter #7 from the Simplex Beam Detector Test Filter Kit (553-509) in front of the detector’s receiver
for 30 seconds.
The TROUBLE (amber) LED must illuminate and a trouble signal must be transmitted by the end of this
test.
SPECIFICATIONS
System Specifications
1. Method
2. Operating voltage
3. Waveform
4. Consumption Current
5. Surge current
6. Fire alarm current
7. Trouble alarm current
8. Fire alarm contact
9. Fire remote contact
10. Trouble alarm contact
11. Coverage
12. Sensitivity
13. Sensitivity error
14. Signal processing
15. Fire signal delay time
16. Delay time for detection of blocked beams
17. Indication of activation
18. Indication of normal monitor condition
19. Compensation required for contamination
of optics
n 20. Fire test terminal, external set terminal
(registration of initial beam data) and
external output of monitor signal terminal
21. Optical axis adjustment
22. Operating environment
23. Insulation resistance
24. Storage temperature
Receiver Specifications
1. Receiving device
2. Photo-signal compensation rate
3. Adjustment for quantity of beams
4. Photo-signal monitor
5. Initial photo-signal setting
6. Light receiving cycle time
Transmitter Specifications
1. Light source
2. Light source drive
3. Light emitting cycle time
4. Light source temperature
: Pulse synchronization and compare
: 24VDC (19.2 - 33VDC)
: Filtered DC
: 250 uA (typical)
: 2.5mA max.
: 40mA max.
: 40mA max.
: 0.5A max. @ 24 VDC
: 0.5A max. @ 24 VDC
: 0.5A max. @ 24 VDC
: 32ft.to328ft.(10mto100m)
: 15, 20, 30, 40, 50, 60 or 70% (7 steps)
: Within f 10% at 50%/span setting
: By 1-chip, 8-bit microprocessor
: 30-60 seconds
: 15-60 seconds
: Fire signal = red LED illuminated.
Trouble signal = amber LED illuminated
: Green LED pulsing
: Automatic compensation for quantity-of-beams
: 0-5VDC (by digital voltmeter)
: By sight and moving parts of detector base
: +32 to + 100°F (with relative humidity not exceeding
95%)
: More than 50 M-ohms (between terminals and enclosure)
: -4to +14O”F
: PIN photo diode
: * 1%/50-70 minutes
: Monitored on a DC ammeter’s 50 uA range. Adjust by
OUTPUT CONTROL knobs to fall in the 17-22 uA range
: 3.5 mm jack (current mode output)
: By SET switch
: 2.7-3.8 seconds (during monitoring, 1.3-l .8 seconds)
: Infrared LED
: Pulse drive
: Depends upon the receiver specifications
: Built-in compensator
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i
Enclosure Specifications
1. Dimensions
2. Weight
3. Material
4. Construction
5. Color
: Length, 6.3 in (16 cm); width, 5.8 in (14.7 cm); height, 7.5
in (19 cm)
: Receiver, 2.4 Ibs. (1.09 Kg)
Transmitter, 2.2 Ibs (1.OKg)
: Diecast aluminium
Anti-fogging filter
: Drip-proof
: Metallic silver
Detector Base Specifications
1. Dimensions : 3.5 in. (8.9 cm)
2. Weight : 0.82 lb. (0.372 Kg)
3. Material : Diecast aluminium
4. Color : Metallic silver
5. Mounting lock : Wrench (provided)
Detector Components
No. Contents Remarks
1 Transmitter 1
2 Receiver 1
3 Base (for transmitter) 1 2 leads
4 Base (for receiver) 1 17 leads
5 Chain 2 Attached to base
6 Wrench (for locking detector) 1
7
Monitor plug (for monitor 1 With cord
output measurement)
8 Instruction manual 1
Notes
1. Each detector consists of a transmitter and a receiver, both of which must bear the same ID number.
2. All specifications are subject to change without notice.
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TROUBLESHOOTING
l Transmitter
2. No monitor output
increases monrtor
4. Detector stays in
alarm (won’t reset)
5. Detector stays in
trouble
able to produce a fire signal
Has the optical axis been shifted? Check the quantity-of-beams (monitor
output)
Has quantity-of-beams (monitor output) changed? Remove the cause
Is MONITOR (green) LED of transmitter pulsing? Check transmitter power lines for open
or short circuit
Is optional test switch in TEST position? Return switch to NORMAL position
Perform the same checks as for a detector that
stays in alarm (see 4 above)
Is material blocking the optical axis? (E.g., a Remove the blocking material
crane or some other moveable object)
Is quantity-of-beams properly adjusted? Check monitor output (17 to 22 uA).
Press SET switch
6. No trouble signal
Are transmitter and receiver lens covers dirty?
Is detector properly connected to power supply?
Clean covers and press SET switch
Connect 24VDC + & - from P.S. to rcvr’s
red & white leads respectively
IMPORTANT: Do not attempt to disassemble the detector.
If the appropriate troubleshooting procedures fail to rectify the problem, contact your local Simplex
branch office for assistance.
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