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SV 258 PRO (AG) User Manual
16
2.2 O
PTIONAL ACCESSORIES FOR
SV
258 PRO
2.2.1 SV 208A
– Sound measurement set
The
SV 208A
Sound measurements set includes: Microtech Gefell
Prepolarised condenser microphone (
MK 255
), microphone
preamplifier (
SV 12L
), outdoor microphone kit (
SA 277
), desiccator
(
SA 270D
), preamplifier cable (
SC 277
) and carrying case
(
SA 250
). The outdoor microphone kit protects the preamplifier and
microphone from weather conditions. The use of the outdoor kit
requires an extension cable between the monitoring station and the
microphone preamplifier (
SC 258
). SA 277 is made of lightweight
materials and is easy to install on a tripod.
The outdoor microphone kit has ¾” screw on its bottom which
enables the use of standard tripods or other user specific
mountings. Technical data such as direct and frequency
characteristics associated with the microphone are specified in the
SVAN 958A User Manual.
Optionally you may use desiccator
– Silica gel. Desiccator absorbs
moisture normally contained in the air.
Note: Desiccator should be regenerated after some
period of use, when it changes colour to light grey, by
drying it for 3 hours in a temperature of 150°C. Desiccator
should be inspected at least every 2 weeks, and more
often when used in conditions of high air humidity.
Note: See also SA 277 Assembly Guide to learn how to
assemble and disassemble the microphone outdoor
protection.
Note: After assembling the SA 208A or after calibration
check that the windscreen foam is properly installed. It
should be shifted close to the anti-bird spikes. Otherwise
the SA 208A free-field characteristics will be different
from declared ones.
For absolute certainty, push the windscreen up to the
stop.
Note: Before installing the station at the measurement
site, make sure that the protective caps on the four
antibird spikes are removed.
It is recommended to use the protective caps during
transportation, storage and other operations with the
instrument like, laboratory calibration, etc. to avoid
personal injury.
Note: Correct connection of the microphone is not signalled by the controller therefore it is
recommended to perform test measurements each time the station is turned on.