SV 258 PRO User Manual
16
2.1.3 External Power Supply with AC/DC converter
The SB 270 external power supply is a waterproof Single Output
Switching Power Supply which is characterised by:
•
Universal AC input / Full range (90 ~ 264VAC)
•
Protections: Short circuit / Over load / Over voltage
•
Fully encapsulated with IP65 level
•
Fully isolated plastic case
2.2
O
PTIONAL ACCESSORIES FOR
SV
258 PRO
2.2.1 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 using 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 Appendix B to learn how to assemble and
disassemble the outdoor microphone kit.
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.
