Sierra Monitor Corporation 3200 Series Users Manual

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Model 3200 Series
Wet Bench Flame Detector
The various chemical vapors, acids and bases used in
the semiconductor manufacturing wet benches pose a
high potential for costly fires. Fires may result in costly
damage to equipment, inventory and clean room facilities. Personnel injury and costly business interruptions
are also likely. Factory Mutual requires electro-optical
flame detectors in the semiconductor wet benches to
monitor for fire. These flame detectors must be suitable for the hostile chemicals used in the etching process (such as hydrofluoric, sulfuric, and hydrochloric
acids). Furthermore, they must be tested and approved
for fire response to FR polypropylene now used in the
construction of wet benches as well as other fuels such
as isopropyl alcohol.
The Model 3200 easily adapts to most standard fire
extinguishing systems and wet bench systems. It utilizes relay output for alarm and trouble and does not
require special controllers or wiring / junction boxes.
The Model 3200 Flame Detector uses proven, stable
UV/IR technology to continuously monitor for flame in
wet bench applications. Using state-of-the-art microprocessor controlled fire algorithms, the Model 3200
can recognize different types of flame signatures while

rejecting common false alarms. Continuous self diagnostics perform tests of the detector operation. Each
flame detector is tested to respond to a 4-inch diameter isopropyl alcohol (IPA) fire at 10 feet with a 120o
field of view.
The standard Model 3200 has a sealed polypropylene
housing designed to an IEC 529 IP67 rating for protection from a wide variety of acids and solvents. Thus
occasional submersion by these chemicals will not damage the detector. The detector is rated over a wide
operating temperature range for those applications
where drying or heating elements are used. A version
utilizing Polyvinylidene Fluoride (PVDF) is also available.

Detector Response to Various Fuels

Model 3200 Dimensions

Fuels

Distance Fire Size

Response T ime

Polypropylene

8 ft.

4 in. dia.

Less than 3 sec.

Isopropyl Alcohol 10 ft.

4 in. dia.

Less than 3 sec.

Heptane

40 ft.

1 sq. ft.

Less than 3 sec.

MEK

15 ft.

4 in. dia.

Less than 3 sec.

Silane

30 ft.

18 in. jet

Less than 3 sec.

Hydrogen

15 ft.

18 in. jet

Less than 3 sec.

Field of View
Sierra Monitor Corp 1991 Tarob Court Milpitas, CA 95035 USA (408) 262-6611 (800) 727-4377 Fax: (408) 262-9042

Flame Detectors

Model 3200 Series
Specifications
Sensitivity:

3.0 seconds to a 4 inch diameter
isopropyl alcohol pan fire (on-axis)
@ 10 feet

Field of View:

120o full cone

False Alarm
Immunity:

Does not alarm to sunlight,
fluorescent lights, flashlights, or
infrared heaters.

Acid/Solvent
Resistant to sulfuric acid,
Resistant Surfaces: phosphoric acid, hydrofluoric acid,
hydrochloric acid, ammonium
hydroxide, nitric acid, isopropyl
alcohol, deionized water, chromium
phosphate, n-methyl-pyrrolidane,
organic solvent base photoresist
strips, ozone, etc.

Input Voltage:

12 to 30 volts DC typically 24 VDC

Housing:

Current Draw:

@24 VDC; 28 mA normal mode; 54 mA
alarm mode

FR Polypropylene (IP67, UL94
flamability rating V0) or
(Polyvinylidene Fluoride - PVDF
available) (for models -2X and -3X)
with a 6 foot pigtail (8 wires
standard - 4 wires for the fire relay, 2
wires for the trouble relay and 2
wires fro the power)

Operating Range
Temperature:
Humidity:

Operating: 32o to 167oF (0o to 75o C)
Storage: -40o to 185o F ( -40o to 85o C)
10 to 90% RH

Typical Fire Type:

FR & HB polypropylene and
isopropyl alcohol

Dimensions:

3.4 x 4.2 x 1.0 inches
(8.6 x 10.7 x 2.5 cm)

Red LEDs:

Two, indicating Normal
Operation and Trouble/Alarm

Weight:

1 lb (0.5 Kg)

Approval:

FM Approved, CSFM 7210-1608:101

Alarm Relay:

1.0 amp @ 30 VDC resistive

Trouble Relay:

1.0 amp @ 30 VDC resistive

Additional Features

UV Sensor:

Solar-blind Ultraviolet sensor - radiant
energy in the 185 to 260 nm band

Self-Test Models:

Incorporate internal self-test for UV
lamp

IR Sensor:

Solid state infrared sensor detecting IR energy in the .715 to 3.5 microns

Enhanced Models:

Incorporate internal self-test and a
RS-485 computer interface for
downloading real time spectral data
pre-fire spectral data (includes 2
additional wires in pigtail)

False Alarm and Fire Response
"This table shows the detectors ability to tolerate both modulated and unmodulated false alarm stimuli and still
to detect a fire in the presence of the false alarm source (all fire tests used a 1.75" diameter alcohol pan fire at
6 feet)
False Alarms Source

Distance

Unmodulated

Modulated

Response Time to Fire

Resistive Electric Heater 1320 Watt

6 Feet

No Response

No Response

Less than 3 sec.

Fluorescent Lights (2) 40 Watt Bulbs

6 Feet

No Response

No Response

Less than 3 sec.

Halogen Light 500 Watt

10 Feet

No Response

No Response

Less than 3 sec.

Incandescent Light 100 Watt

6 Feet

No Response

No Response

Less than 3 sec.

Ordering Information
3200-01

Standard, (Normally C losed - NC Trouble Relay)

3200-02

Self-test, (NC Trouble Relay)

3200-03

Enhanced, (NC Trouble Relay)

3200-04

Standard, wi th SealC on and Turk connectors (NC Fi re, NC
Trouble)

Options:
3240-01

Flame D etector Tester (for Model 3200 Flame D etector)

Sierra Monitor Corp 1991 Tarob Court Milpitas, CA 95035 USA (408) 262-6611 (800) 727-4377 Fax: (408) 262-9042
Visit our Web site: www.sierramonitor.com
E-Mail: sierra@sierramonitor.com
© 2009 by Sierra Monitor Corporation Rev. B2-02-23-09



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