1. Intended application
The 2-driver sound sources are optimized for low to medium
frequency measurement applications with better than +- 2 dB
omnidircetionality in 3D up to 5600 Hz. The Qohm2 source
easily satisfies the ISO140 and ISO 3382, ISO 16283-1 and 354
requirements.
The intended frequency range for high noise levels is from the
50 Hz third octave band till the 16 kHz third octave band. It is
possible to use the source at lower frequencies, with reduced
level. Wide band signals like white noise, pink noise, chirps etc.
can be used as well as sine signals.
The source is intended for use indoors, or in any moderate
moisture and moderate temperature environment. If exposure
to splash water or severe humidity is unavoidable, the source
can be wrapped in a thin plasic bag. However, this will resitrict
cooling and therefore the level and/or duration of operation
should be reduced. If used for music reproduction, it is advised
to keep the Qohm2 sources clear of walls, floor by at least 1
meter for a natural effect.
2. Placing the source on a tripod or other stand
Qohm2 is provided with a specifically adjusted light weight tripod for secure mounting of the
sound source.
Two sockets with M8 thread are available. These will fit to any M8 bolt or thread-end like the
provided tread-ends. Same for the tripod. Tightening of the M8 should be done by hand,
preferably. But a number 13 mm tool can also be used with care. Do not apply a torque higher
than 4 Nm.
A support or tripod can only support the source if the underground is stable and horizontal,
the spread of the legs is wide enough to allow the height, if the cables are protected against
tugging. And, any tripod can malfunction or slip. Make sure the set-up is secure.
The sources can also be placed on the circular handle, using it as a short support, but it should
only be done with the cable secured to the underground and only on a completely stable
underground.
3. Connections and powering
The sources as a standard have a neurik 2 pole socket.
To remove, turn the plug a few degrees and pull it out.
The plug should be easy to extract, when rotated at the right angle
The Qohm2 has a thermal protection and a overcurrent protection. When a
protection activates the maximum output level decreases to a level which
is much lower than the normal maximum level. Some lower level signal is
still allowed to go to the source. This lower level indicates that the source
is still working, but needs a cool down. So the level needs to be turned
down to allow it to recover and for the protection to reset.
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Ketelwinning 38 B-3290 Diest Belgium
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