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UV-4 Flame Detector

372000-28 Rev J

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Содержание UV-4

Страница 1: ...UV 4 Flame Detector 372000 28 Rev J ...

Страница 2: ...OTICE The contents of this publication are proprietary data of Forney Corporation Forney reserves all proprietary rights to this document including all design manufacturing reproduction use and sales rights thereto except to the extent said rights are expressly granted to others SAFETY ICON DEFINITIONS DANGER Indicates a hazardous situation which if not avoided will result in death or serious inju...

Страница 3: ... with Fiber Optics Light Guide 3 1 1 Mechanical Specifications 4 1 2 Electrical Specifications 4 Section 2 Safety 5 Figure 5 Cable Connections to Detector Head 5 Section 3 Commissioning 6 Section 4 Removal Installation 6 Section 5 Operation 7 5 1 Normal Operation 7 5 2 Self Test Operation 7 Section 6 Maintenance 7 Section 7 Troubleshooting 8 Table 1 UV 4 Flame Detector Troubleshooting 8 Section 8 ...

Страница 4: ...bassemblies a head assembly and a base assembly The head assembly figure 1 consists of a machined housing that contains the internal electronics of the flame detector Figure 1 UV 4 Head Configuration The sensor tube contains an ultraviolet sensitive gas at reduced pressure When UV light enters the tube the gas ionizes enabling current to flow between two electrodes Signal conversion electronics on...

Страница 5: ...es the electronic components from furnace gases in the sight tube The flame detector is available with either pigtail wiring or a bulkhead connector that provides the electrical interface with the external amplifier assembly Figure 2 Base Assembly with Bulkhead Connector Figure 3 Base Assemblies with Pigtail Wiring A base with a fiber optic light guide This assembly includes a fiber optic cable as...

Страница 6: ...UV 4 Flame Detector 372000 28 Rev J 3 Figure 4 Base Assemblies with Fiber Optics Light Guide ...

Страница 7: ...ture Refer to submittal drawings for figures specific to this project Spectral Response UV mode 190 to 260 nanometers 1 2 Electrical Specifications Shutter Solenoid Power 14 1 vdc 0 9 to 1 0 A nominal current Input Power _15 vdc 47 mA nominal current Output Signal Open collector 500 µs digital pulse train Power Consumption 12 vA maximum I O Cable Connector MS3116E10 6S units with bulkhead connecto...

Страница 8: ...se the ball valve attached to the sight tube In addition maintenance personnel should wear safety glasses to prevent eye injury from pressurized gas and flying particles CAUTION The detector head contains sensitive electrical components Ensure that all power is removed from the external amplifier assembly before connecting or disconnecting the I O cable NOTICE Disconnect the cable from the detecto...

Страница 9: ...base assemblies from the furnace mounting b Reassemble the flame detector and place a UV light source 1 to 4 feet from the surface of the lens or the end of the fiber optic light guide c Use an oscilloscope to measure the signal from the flame detector head at the input terminal of the external amplifier The signal observed should be a series of digital pulses having a maximum frequency between 1 ...

Страница 10: ...egins recharging the capacitor in the anode circuit Since the RC time constants for the anode and cathode circuits are fixed the interval between successive discharges is directly proportional to the magnitude of UV flux incident on the tube Each discharge through the sensor tube produces a high voltage pulse having a duration of no more than a few microseconds Since the magnitude of the voltage p...

Страница 11: ...avoid scratching the glass 3 Replace detector head Return unit for repair or replacement No signal output 1 Supply voltage to head not present 2 Detector head assembly not functional 3 Overheated detector head 1 Verify that external amplifier is supplying the correct voltages for the selected operating mode 2 Replace detector 3 Check the surface temperature of the detector If the temperature is gr...

Страница 12: ...y material to Forney please contact your Forney customer service representative and provide the contract number or the customer purchase order number Contact Forney s Aftermarket Department via any one of the following methods and furnish the following information E mail Phone Fax spares forneycorp com 972 458 6100 or 972 458 6142 or 1 800 356 7740 24 hour direct line 972 458 6600 1 Contract numbe...

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