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0809

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BFI Automation Dipl.-Ing. K.-H. Mindermann GmbH, Eggerscheidter Str. 57, D-40883 RatingenTel. +49 (0) 2102 96 82 0, Fax +49 (0) 2102 9682 42

EMail: info@bfi-automation.de

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AutomationBFI

SYSTEM 3000 / 4000

COMPACT FLAME CONTROLLER

FIBREOPTIC TECHNIQUE

TECHNICAL DESCRIPTION

EDITION: TB LWL-SZ1

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Fibre optic technique

- Temperatures up to 200C

- Alternative to Ex-housings- Small, very robust type of construction- Protection IP 68

Application

The fibre optic flame scanner series is an exten-

sion to the flame monitoring and evaluation sy-stems 3000/4000whilst maintaining full, compa-tibility. A fibre optic flame scanner consists of a

robust probe, SKL, which is coupled to an opto-electronic converter, O/E-converter through aflexible length of fibre optical cable.

The compact and robust probe can withstandhigh temperatures and strong vibration. The sy-stem is therefore ideally suited for installations

where the mounting and cooling of a conventio-nal flame scanner is difficult or impossible. Themonitoring of gas turbines is a good example of

this.The probe has internal optics which project afield of view of 2.7onto the glass fibre bundle.

The assembly can withstand ambient temperatu-res of up to 200 C (for short time periods evenup to 300C). The probe and cable are delivered

together as a sealed unit. The radiation sensitiveend of the probe has a 1-thread counterpiece sothat it can be fixed onto a sight tube without the

fibre optic cable being twisted.Different types of fibre optic cable with radiationtransmission in the ultraviolett and visible or visi-

ble and and infrared spectral ranges are availa-

ble. Therefore, the scanner can be configured to

monitor the flame in the regions maximum emis-sion or best selectivitv depending on the fuelbeing used. The glass fibre bundle is shielded by

a silicon insulation which is in turn protected by aflexible steel cladding. The cable is water- anddustproof, as weIl as being resistant to acids and

high temperatures.The Iength of the fibre optic cable depends onthe Iocal installation and is confectioned accor-

dingIy. As there is some loss of radiation inten-sitv, we recommend the use of length betweentwo and five meters. Longer cables are possible,

but especially for ultraviolet detectors testsshould be run beforehand to ensure that no pro-blems will develop.

In the optoelectronic converter, the radiation fallson a detector which delivers an electric signal. A

detector with a sensitivity range optimized for thetype of fuel to be monitored is used. The follo-wing electronics is similar to that of the standard

scanners. The converter is designed to be con-nected to the 3000/4000flame amplifier modu-les.

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Dimension

Technical data

Spectral transmission of theIR/VIS-fibre optic: 430.- 2.400 nm

Spectral transmission of theUV/VIS- fibre optic: 260 - 1.200 nm

Fibre optic cable diameter: : approximate 10 mm

Cable length: optional: 2m to 5m (max. 10m)

Minimum curvature radius: >30mm

Ambient temperature: up to 200C (briefly 300C max.)

Sight tube thread: ISO 228 G1

Protection: probe IP 68,O/E- converter IP 65

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probe SKL

O/E-converter

fibre optic cable

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Type

Ser.-No.:

24Vdc

Germany

120

155

106

G1

152

122

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