Sierra Monitor Corporation 3100 User Manual

The Sierra Monitor Model 3100 Series Flame Detector utilizes Ultraviolet, Infrared and Visible spectrum to provide continuous and reliable flame detection. Flame detectors incorporating just IR or just UV can experience false alarms. Even some IR/UV detectors can experience false alarms. But the Model 3100 incorporates a unique three spectra design. This provides the Model 3100 with enhanced false alarm rejection. An additional benefit of this design is the ability of the Model 3100 to detect flame from hydrocarbon and non-hydrocarbon sources, making it the ideal product for typical chemical/petrochemical plants where the flame source could be from a variety of gases.

Model 3100 Series

Flame Detector

The microprocessor in the Model 3100 is programmed with state-of-the-art fire algorithms and continuously analyzes the data from the sensor array for individual intensity values, change of intensity values, relationship of intensity values, and frequency signature correlations. Each algorithm is designed to recognize a different type of flame signature from the detectors while rejecting common false sources. When the conditions of any one of the several fire algorithms are met the Model 3100 declares a fire.

When the alarm decision is made in the microprocessor, the detector stores the pre-fire spectral data in nonvolatile memory and outputs an alarm signal in the form of a relay transition. The enhanced relay models also include a second alarm relay available for alarm verification purposes. The verification level is field selectable.

Field of View

The Model 3100 is the only flame detector that provides RS-232 access to pre-fire spectral data and diagnostic information. Self diagnostic features of the micro-processor continuously perform system tests, watching for any faults which would impair its ability to accurately detect a flame and declare an alarm. The systems being checked include input power, sensor circuit s, relay circuits and several other internal systems. The Model 3100 also performs a through-the-lens test of the sensor and lens systems. All faults are recorded in non-volatile memory and may be retrieved at any time by the operator.

The Sierra Monitor Flame Detector features 120 degree solid cone field of view, the widest in the industry. The Model 3100 series is in a copper-free cast aluminum NEMA 4X rated explosion proof enclosure.

Detector Response To Var ious Fuels

Fuel Distance Fire Size Response Time

Heptane 80 Feet 1 Square Foot Less than 3 sec. Silane 50 Feet 18 inch jet Less than 3 sec. Hydrogen 15 Feet 18 inch jet Less than 5 sec. Kerosene 75 Feet 1 Square Foot Less than 5 sec.

Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 (408) 262-661 1 800-727-4377 FAX: (408) 262-9042

Model 3100 Series Flame Detectors

Specifications Sensitivity: 1 ft. sq. Pan fire on axis ~ 80 feet within 5 seconds (using standard fuel)

Switch selectable form 20 to 80 feet to a 1 sq. ft. kerosene fire

Field of View: 120 degree cone Responsivity: UV - 180 to 260 nm, IR - 0.715 to 3.5 microns, Visible - 480 to 560 nm Input voltage: 15 to 32 volts, typically 24 volts Current draw: @24 Volt s DC: 72 mA normal mode, 82 mA alarm mode

T emperature range:

Operating: -40°F to 185°F (-40°C to 85°C) Storage: -67°F to 230°F (-55°C to 110°C)

LEDs: Display switch settings, fault type, fire and verified fire information Relays:

Model 3100-01: Fire and Fault Relays

Fire Relay: 0.5 amp ~ 120 V AC, 1.0 amp @ 24 VDC resistive, normally open and normally closed contacts, latching or fire-following modes Fault Relay: 0.5 amp ~ 120 V AC, 1.0 amp ~ 24 VDC resistive, normally open, common and normally closed contacts

Enhanced Relay Fire, Fault, Verify and Aux Relays

Models: Verify Relay: 0.5 amp ~ 120 VAC, 1.0 amp ~ 24 VDC resistive, normally open and

normally closed contacts are available. May be operated in either a latching or fire following mode. Aux Relay: 0.5 amp ~ 120 V AC, 1.0 amp ~ 24 VDC resistive, normally open and normally closed contacts are available. Normally used to indicate a Lens Check Fault.

Enclosure: Copper-free Cast Aluminum with epoxy finish Hazardous area

classification: NEMA 4X Enclosure rating, Explosion Proof

Class I, Div. 1 and 2, Groups B, C, D, Class II, Div. 1 and 2, Groups E, F, G, Class III

Dimensions: 5.4 x 4.8 x 3.7 inches (13.7 x 12.2 x 9.4 cm) Weight: 3 lbs (1.3 Kg)

Approvals: FM Approved, CSFM: 7210-1608:100

esnopseReriFdnamralAeslaF

detaludomnudnadetaludomhtobetarelototytilibasrotcetedehtswohselbatsihT"

lla(e

)teef6taerifnaplohoclaretemaid""57.1adesustseterif

ecruoSsmralAeslaFecnatsiDdetaludomnUdetaludoM

ttaW0231retaeHcirtcelEevitsiseRteeF6esnopseRoNesnopseRoN

sbluBttaW04)2(sthgiLtnecseroulFteeF6esnopseRoNesnopseRoN

ttaW005thgiLnegolaHteeF01esnopseRoNes

ttaW001thgiLtnecsednacnIteeF6esnopseRoNesnopseRoN

ttaW05redleWcrAteeF52esnopseRoNesnopseRoN

Ordering Information

Model Verified Alarm Aux. Relay Standard Alarm and Trouble Output 3100-01 N /A N/A 3100-02 Open Contacts Closed Contacts 3100-03 Closed Contacts Open Contacts 3100-04 Open Contacts Open Contacts 3100-05 Closed Contacts Closed Contacts 3100-06 20mA N/A Normal 4 mA alarm 12 mA Trouble 0 mA

These devices have both normally open and normally closed relay contacts.

cruosmralaeslafehtfoecneserpehtnierifatcetedotllitsdnailumitsmralaeslaf

nopseRoN

Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 (408) 262-661 1 800-727-4377 FAX: (408) 262-9042