1084
Installation Guide
Compatible Equipment
All Hardwired Control Panels, for example:
9800+
8-16 zone control panel
808
8-12 zone control panel
816
8-16 zone control panel
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1084
Introduction
The 1084 Twintec ® Twin Technology Detector is an indoor motion detector
for use in wired intruder alarm systems and is suitable for commercial burglar
alarm systems.
The 1084 Twintec combines both Microwave and Passive Infra Red (PIR)
technologies in a single small detector, giving a conical surveillance area as
shown in Figure 1.
Figure 1. Detector Surveillance Area
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Technical Specification
The Twintec is Microprocessor based and uses digital signal processing
techniques combined with Energy/Frequency analysis on PIR channel and
M.E.V. (Multi Event Verification) on microwave channel.
Complete metallic shielding of the electronic circuitry stops false alarms
caused by RFI. Optical and software filters stop false alarms caused by white
light and fluorescent lighting. The range of the microwave sensor may be
selected to limit coverage to the area requiring protection.
Two sets of relay contacts are provided. The alarm contacts are Single Pole
Change-over in alarm (NO/C/NC) and the tamper contacts are closed with
the cover on.
Technical Specification
The detector comprises a white textured ABS chassis, a cover containing the
lens and a metallic shielded printed circuit board which can be removed to
aid installation.
Supply Voltage
8-15V DC.
Current
20mA.
Relay Output
SPCO, 30V, 100mA DC.
Change-over in alarm with 22ohm resistor in series
Tamper Output
SPST, 30V, 100mA DC.
Closed with cover on.
Detection Pattern
Conical (see Figure 1).
Operating Temp
-10°C to +55°C.
MW Range
Adjustable100- 30% by potentiometer.
Microwave
Dielectric Resonant Oscillator with microstrip
antenna 10.687 GHz.
Infra Red Sensor
Dual element pyroelectric detector, hermeticallysealed.
Microwave
In the event of microwave section failure, Supervision reverts unit to PIR only operation and causes
PIR to convert from Single Edge to Double Edge
PIR operation. Alarm/Test/Trouble LED flashes
every second if programmed for Trouble. Detector
pcb ‘Trouble’ output also operates with open
collector to 0V.
RFI/EMI Immunity
Unit will not alarm when subjected to RFI signals of
1MHz to 1GHz with a field strength of 10 Volts/
Metre.
Fluorescent Tube
Will not alarm from an 80W, 1.83m tube positioned
482mm above and 1.98m Immunity in front of the
unit and cycled I minute On and 30 seconds Off.
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Wiring Connections
1084
LED Indicators
5 LEDs.
2 x Red - Alarm/Test/Trouble.
2 x Green - PIR.
1 x Yellow - M/W.
Mounting
Flat ceiling mounting. (Flush Mount Kit available).
Physical
Dia. x Depth 120 x 55mm.
Approval
DTI Spec. MPT1349.
Warranty
5 years.
Recommended mounting height is between 2.4m and 4.6m (Figure 2). Avoid
heights in excess of 4.6m as the detection sensitivity declines to an inadmissible level.
Figure 2. Graph of Range vs Mounting Height (see Fig 1 for a, b and c)
Specification subject to change at any time.
Wiring Connections
1.
2.
3.
4.
5.
6.
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Ensure that the wiring has no power applied.
Connect terminals 1, 2 and/or 3 to the control panel or warning device,
depending on circuit requirements.
Connect terminal 4 to the positive supply.
Connect terminal 5 to the 0V supply.
Use Terminal 6 (EOL) as a connection point for EOL devices.
If the control panel has a 0V Test facility, connect terminal 7 (Test) to
the control panel Test connection. If connected the ‘Walk Test’ LEDs
will be enabled only when ‘Walk Test’ is selected at the control panel. If
no Test facility is available at the control panel, a switch can be used to
switch the 0V supply to terminal 7.
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7.
8.
Adjusting the Surveillance Pattern
Terminal 8, an open collector, will go to 0V if the microwave supervision
detects a malfunction in the microwave detector. Connect to control
panel ‘Trouble’ input or to other signalling device.
Connect terminals 9 and 10 to the control panel ‘Tamper’ circuit or other
warning device.
Figure 3. Connecting the 1084
Adjusting The Surveillance Pattern
Once the detector is installed, the surveillance pattern of both the microwave
and PIR sensors must be adjusted to suit the protected area. To check the
actual coverage of the detector, place links on the appropriate jumper links
as described below for each function, then walk test the protected area.
Note: A walk test can be carried out on either the microwave sensor or the PIR
sensor, or both detectors simultaneously.
Microwave Pattern Adjustment
The detector works best with the microwave sensor adjusted to the minimum
sensitivity necessary. Proceed as follows:
1. Remove the cover and fit link across Test jumper pins (Figures 4 and
5).
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Adjusting the Surveillance Pattern
1084
Figure 4. Inside the 1084.
Figure 5. Jumper Link Settings.
2.
3.
4.
5.
6.
7.
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Fit link across Microwave jumper pins.
Apply power to the detector and refit cover.
Stand outside the protected area and wait for the Alarm LEDs to go out.
Walk into the protected area and stop when the Alarm LEDs illuminate.
Mark the position carefully.
Repeat steps 4 and 5 throughout the protected area unit the complete
microwave surveillance pattern has been mapped.
If necessary adjust the Microwave range potentiometer to obtain the
desired surveillance pattern.
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PIR Pattern Adjustment
PIR Pattern Adjustment
1.
2.
3.
4.
5.
6.
Remove the cover and fit link across Test jumper pins (Figure 5).
Fit link across PIR jumper pins.
Apply power to the detector and refit cover.
Stand outside the protected area and wait for the Alarm LEDs to go out.
Walk into the protected area and stop when the Alarm LEDs illuminate.
Mark the position carefully.
Repeat steps 4 and 5 until the complete PIR surveillance pattern has
been mapped.
Masking
It may be impossible to avoid problem areas within the surveillance pattern,
for example; air currents. If false alarms are established during walk testing
and the cause cannot be removed from the protected area, locate the cause
and establish the lens segment covering the particular area. Mask the lens
segment from the inside of the lens using only the masking material supplied.
The centre lens should be masked when mounting the detector less than
2.4m high.
Setting The Operational Mode
When the surveillance pattern has been set up for both microwave and PIR
sensor and any necessary masking has been done, the operational mode of
the detector must be set.
Setting The Walk Test Mode
With a link fitted across the ‘Test’ terminals, the alarm LEDs will indicate
movement at all times. However, where Alarm LED illumination is not desirable during the ‘Unset’ period, the link should not be fitted to the ‘Test’ jumper
pins and should be left fitted to one pin only. In this mode the Alarm LEDs will
only illuminate during a ‘Walk Test’ initiated by applying 0V to terminal 7, e.g.,
panel walk test, (or if the link is fitted across the ‘Test’ terminals).
Setting ‘Trouble’ LED Mode
The Alarm LEDs can be set to flash in the event of the microwave supervision detecting a microwave malfunction by fitting a link across the ‘Trouble’
jumper link.
The operation of the microwave sensor and the PIR sensor will depend on
the position of the links across the ‘Microwave’ and PIR jumper pins.
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PIR and Microwave Activation
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PIR And Microwave Activation
This is the normal mode of operation and requires both the microwave and
PIR sensors to detect movement before the alarm relay is activated. To
achieve this mode of operation neither the PIR or Microwave jumper pins
should be linked.
PIR or Microwave Activation
In this mode of operation the relay will be activated if either the PIR sensor or
Microwave sensor detects movement. In this mode of operation, the detector
is highly sensitive and should only be used in extremely secure environments, e.g., bank vault. To achieve this mode, both the PIR and microwave
jumper pins should be linked.
Final Testing
Once both detection patterns have been adjusted and the operational mode
has been selected, the operation of the complete detector should be tested
as follows:
1. Select ‘Walk Test’ if applicable.
2. Clear the protected area and make four random direction walk tests.
Walk at a rate of one normal step per second within the detection
pattern. The unit should alarm within three out of the four walk tests.
3. Stand outside the protected pattern and operate any potential cause of
false alarm, e.g., operate lights, open doors, etc. If the unit detects the
deliberate cause of false alarm, try adjusting the detector pattern.
4. Stand outside the detection pattern and observe the detector operation
for three to five minutes without doing anything. The detector should not
alarm. If the detector does alarm, locate the cause and correct it.
When walk testing, cross the sensitive zones at right angles in upright position. After each activation wait until the LED’s extinguish.
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