UVH7-WP WEATHERPROOF UV FLAME SCANNER

Weatherproof UV Flame Scanner

The UVH7/WP is a self-checking Ultra-Violet flame scanner for use with any of the Elcontrol self-checking flame amplifiers, such as the GP320/SCUV, GP320/EURO/SCUV, UV10 etc.

The casework is cast aluminium and offers ingress protection to IP65 standard.

Sight tube connection is via a 2.5" BSP cap nut


Part Number: UVH7/WP

Category: Burner Control Equipment

Availability: 4 - 8 weeks

Tags: burner, control, UV, Flame, Scanner, weatherproof

PRODUCT DESCRIPTION

The UVH7/WP is a self-checking Ultra-Violet flame scanners for use with any of the Elcontrol self-checking Trip amplifiers, such as the GP320/SCUV, GP320/EURO/SCUV, UV10 etc.

The casework is cast aluminium and offers ingress protection to IP65 standard.

Sight tube connection is via a 2.5" BSP nut. The UVH7/WP is fitted with a 2 inch synthetic quartz lens, which gives increased sensitivity

The unit is supplied, as standard, fitted with an IP65 gland and 2m of armoured cable. Other lengths of cable, or cabling options (e.g. a flying plug/socket assembly) may be supplied to order.

 

OPERATIONAL DESCRIPTION

The unit contains an ultra-violet sensitive gas discharge tube supplied from a high-voltage AC supply. When UV radiation is incident on the electrodes within the cell, ionisation takes place, and a current flows. This ionisation is quenched every mains half-cycle, resulting in a theoretical maximum value of 100 ionisation's per second (for 50Hz mains frequency). This current flow is processed within an electronic circuit, resulting in an output signal consisting of a stream of pulses.

The UV radiation from the flame is interrupted by a shutter mechanism at a rate of 1Hz, resulting in periodic interruptions to the output pulse stream. This is the basis of the self-checking mechanism of the viewing head. The associated flame amplifiers are designed to detect these periodic interruptions in the output signal. Should an uninterrupted train of pulses be detected, this indicates a fault within the viewing head, typically a faulty UV detector cell, and the flame amplifiers respond to this accordingly by ceasing to indicate flame on.

Optionally, for situations where the UV signal from the flame may occasionally be unreliable, the UVH7/WP may be supplied with a silicon backup cell, sensitive to infra-red/visible-light flicker, for use with appropriate dual flame-amplifiers. Contact Elcontrol engineering for further information.

Additional details

Enclosure Material:: Aluminium
Cell Life: 10,000 hours typical
Overall Dimensions: Width 120mm (not including snout) Height 160mm Depth 90mm
Operating Voltage (factory set): 110V, 240V AC 50Hz
Output Signal Current: Typically 5mA DC into 10K load
Working Temperature: -40 to +85°C
Weight:4.5 Kg approx..)
Spectral Response: 190 - 270nm
Shutter Operating Frequency: 1Hz

Documentation

UVH7-WP product sheet