Instrument Meter Specialties
2108 B West Magnolia Blvd
Burbank, CA 91506
Phone: 800-926-3837 FAX: 818-841-2379
Specifications
A low range ac voltmeter suitable for connecting across a 600 ohm line
and self contained except for requiring an external 3.6k ohm resistor.
Calibrated for use with a 3.6k ohm resistor 4vu above the scale marking
so that the reference deflection (0vu) is produced by a signal 4vu above
1mW in 600 ohms (1.228v).
The performance of the meter is based upon the requirements of BS 6840: Part 17:1991, IEC 268 - 17: 1990. The dynamic characteristics quoted,
which requires the response time to 99% of reference deflection (0vu) to
be 0.3 seconds +/-10% with an overswing of at least 1.0% but not more
than 1.5% are not fully met.
The overswing, because damping is not so tightly controlled but allowed
to spread within normal design restraints, can vary between deadbeat to
5%. To specify the dynamic characteristics in terms of time to 99% of
0vu under such circumstances would give an unrepresentative measure of
the speed of response. For this reason the time to reach -3vu with a
steady reading of reference deflection (0vu) has been taken as a more
realistic measure.
The following comparison can be made based on a rise time to -3vu with steady deflection of 0vu:
Conventional vu meter 0.13 - 0.15 seconds
AL19 0.14 - 0.18 seconds
AL29 0.16 - 0.20 seconds
AL39 0.17 - 0.21 seconds
Product – general description
The Presentor Audio Level Range of Analog Panel Meters complements the proven and popular industrial series. This series is available in three sizes each in four styles and offer a performance not significantly different from full specification vu meters to meet today’s audio market requirement for quality at affordable prices.
Features and Benefits
Each of the four styles available can be provided for
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Front of panel mounting with full bezel
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Front of panel mounting with lower mask
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Back of panel mount
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Back of panel mount with accompanying frame
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Constructed with transparent acrylic front and high impact transparent polystyrene rear body molding. Masks and bezels are molded in black ABS.
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Taut band core magnet movement incorporated as standard with compact 26mm diameter barrel. This rugged movement makes these meters equally suitable for portable or fixed audio applications. There is no calibration effect when mounted on a ferrous panel.
Pointers and dials
The combination of tube pointer and flattened arc scale on translucent buff colored dial results in an easily read meter, even when monitoring a row on a large console. A white dial can be specified if required. The standard scale is based on the vu ‘A’ scale as illustrated in the above photographs, but the ‘B’ scale with the ‘percent’ reading at the top can be supplied to order.
Zero adjuster
Positioned on the rear as standard, but can be offered on the front
Certified drawings
Available on request.
Operating temperature
-25C to +55C
Illumination
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Overhead
Available for types 19W/F, 29W/F, and 39W/F
Unit contains 6mm festoon style lamp available in 6V, 12V, or 24V.
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Lightbox
Available for all styles of types 29 and 39. The meter fixing studs occupy different positions and rectangular panel cut-outs are required for styles M and B. Drawings are available on request. Unit is available with either festoon style or T1 ¾ flanged lamps available in 6V, 12V, or 24V. T1 ¾ flanged LED’s are also available in 12V . (One lamp on type 29, two lamps on type 39)
For front of panel mounting with full bezel
Types: AL19B, AL29B, AL39B
Max panel thickness 6.0mm/0.24”
Meter barrel cut out 27.0mm/1.06”
Fixing studs M2.5x10.0mm/0.39” (except type 19: M2)
For front of panel mounting with lower mask.
Types: AL19M, AL29M, AL39M
Max panel thickness 6.0mm/0.24”
Meter barrel cut out 27.0mm/1.06”
Fixing studs M2.5x10.0mm/0.39” (except type 19: M2)
For back of panel mounting with only the scale and pointer visible.
Types: AL19W, AL29W, AL39W
Meter barrel cut out 27.0mm/1.06”
Fixing studs M2.5x10.0mm/0.39” (except type 19: M2)
For back of panel mounting with bezel and with only the scale and pointer visible.
Types: AL19WF, AL29WF, AL39WF
Max panel thickness 4.0mm/0.16” (except type 19: 3.0mm/0.12”)
Meter barrel cut out 27.0mm/1.06”
Fixing studs M2.5x10.0mm/0.39” (except type 19: M2)
