DIGITAL UV SIGNAL STRENGTH METER

DIGITAL UV SIGNAL STRENGTH METER

The Elcontrol battery-operated digital SCUV signal strength meter is a convenient hand-held tool for diagnostic and setting up purposes. It is intended for use with any of the range of Elcontrol self-powered ultra-violet flame scanners such as the UVH6, UVH6/FP, FP87, or UVH12/21 series, and may also be used with the UVH8/WP range.


Part Number: UV Digital Meter

Category: Burner Control Equipment

Availability: 4 - 8 weeks

Tags: burner, control, UV, Flame, Scanner, Amplifier, Meter

Product description

The Elcontrol battery-operated digital SCUV signal strength meter is a convenient hand-held tool for diagnostic and setting up purposes. It is intended for use with any of the range of Elcontrol self-powered ultra-violet flame scanners such as the UVH6, UVH6/FP, FP87, or UVH12/21 series, and may also be used with the UVH8/WP range. The unit is housed in a plastic enclosure of dimensions 145mm x 80mm x 35mm. It contains a 2-digit 0.56" 7-segment LED display, and has screw/4mm terminals for making connection to the signal output from the flame scanner. The unit contains circuitry which permits it to be connected to both the older 'analogue' style of UV flame amplifier (such as the Elcontrol GP320/SCUV) or to the more modern digital types (such as the GP320/UV10), without, in either case,  the necessity of disconnecting the amplifier from the scanner. Signal measurements may therefore be made 'in-situ', even while the plant is still operating.

Principle of Operation:
The signal from the viewing head (when seeing a strong UV flame signal) consists of a train of voltage pulses at a rate of 100 pulses per second (for a 50Hz mains frequency). As the UV signal level from the flame decreases, the pulse rate drops and an indication of the UV signal strength can be obtained by measuring this pulse rate. In 'self-checking' heads, the illumination from the flame is interrupted, once per second, by a mechanical shutter arrangement, producing a corresponding 1Hz interruption in the output signal. This means that, even under strong signal conditions, a rate of 100pps should never be obtained (50-60pps is more normal). If too high a rate is obtained this can be an indication of a problem such as a faulty UV detector cell.

Using the Signal Strength Meter:
There is a single push-button on the front of the meter. This is pressed once to turn the meter on, and pressed again to turn it off. The 'A' (black) and 'B' (red) terminals at the top of the meter case should be connected to the 'A' and 'B' signal connections from the flame scanner. NB: the input of the meter is of fairly high impedance, so both signal leads from the meter should always be connected. The LED display will show the flame pulse count as measured. The decimal point on the right-hand side of the display will operate when pulses are being received from the flame scanner, and can be used as an indication of the operation of the shutter mechanism (for SCUV scanners). Observations of the signal reading can be used to evaluate and optimise the viewing head sighting. In order to maximise battery life, the unit has an automatic power-off function. If a reading of zero (no UV signal) is present for longer than 60 seconds, the unit will switch itself off.

Specifications:

Power supply:

9V PP3 battery.

Battery Life:

Using an alkaline battery, an operating life of up to typically 10 hours of use may be expected.

Additional details

Documentation