2.2 SOUND MEASUREMENTS IN SPECIAL CONDITIONS
While measuring a low-level acoustic pressure, the instrument should be placed on a tripod and the person
measuring should be at least 1 meter from the microphone and do not touch the instrument. To control the
instrument and readout results, it is recommended to use the Assistant smartphone application!
At locations where the static (ambient) pressure is from 65 kPa up to, but not including, 85 kPa, before the
measurement, the device must be calibrated with a Class 1 calibrator (e.g. SV 36).
2.3 MEASUREMENT CONFIGURATIONS AS VIBRATION LEVEL METER (VLM)
The instrument can operate as VLM with the SV 80 general-
purpose accelerometer 100 mV/g (10 mV/ms
-2
) with the
SC 27 coiled cable (see Appendix C for specification).
Chapter
17.3 presents the way of connecting the
accelerometer to the instrument.
2.4 INPUT AND OUTPUT SOCKETS OF THE INSTRUMENT
SV 977D is supplied disassembled, so the user should mount the MK 255
microphone and SV 12L preamplifier on his own.
It doesn’t matter which elements will be assembled first: the microphone with
the preamplifier or the instrument with the preamplifier.
To connect the preamplifier to the instrument, first insert the tip of the
preamplifier into the socket and tighten the ring to the first screw thread. Then
move the preamplifier outer sleeve in the direction to the instrument and
tighten it to the screw thread.
See also Chapter
17 for instrument Maintenance.
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