SV 277 PRO User Manual
19
2.2. O
PTIONAL ACCESSORIES FOR
SV
277 PRO
2.2.1.
Sound Calibrator
For result verification purposes, most norms and
standards impose the requirement to calibrate the
measurement channel before and after each
measurement or measurement session.
Sound calibrator is a device which produces sound
pressure of defined level and frequency.
The
SV 36
1 Class Sound calibrator produces sound
pressure of declared levels - 94 or 114 dB at a
frequency of 1 kHz.
This calibrator is equipped with autorun function. It
starts generation of the declared sound pressure
automatically after insertion of the microphone into
the calibrator hole.
2.2.2.
External rechargeable battery
The
SB 272
external rechargeable battery supplies
the DC power for the monitoring station. It includes a
Lead-Acid rechargeable battery (33 Ah, 12 V) and is
dedicated for outdoor use because of its waterproof
case. The battery capacity enables up to three times
longer operating time of the monitoring station in
comparison to the station’s internal 17 Ah battery.
The SB 272 set includes the SB 273 indoor charger
and a cable for connection between SB 272 and the
monitoring station.
SB 272 has the same connector for charging and for power supply and therefore cannot
be used as a power supply for the monitoring station and at the same time be charged
(as the internal station battery with solar panel or external power supply).
Note: SB 272 cannot be charged by the monitoring station SB 270
power
supply!
Note: SB 272 is not restricted for air, surface and water transport. Classified
as non-hazardous material (IATA/ICAO Special Provision A67, DOT-CFR
Title 49 parts 171-189, IMDG amendment 27).
Note: It is necessary to charge SB 272 after any total discharge, otherwise
the battery may lose its capacity
.
Note: SB 272 should not be stored for a long time with a discharged battery.
Storing SB 272 with a discharged battery may damage it.
Note: If SB 272 is planned to be stored for a long period of time, it is
recommended to charge its battery to 100% capacity. The battery should be
charged at least once per 6 months.
