Svantek SVAN 977A - Page 206

206
SVAN 977A User Manual - Appendixes
Maximum peak voltage 30 V Peak-Peak (Maximum peak voltage of input sinusoidal
signal, which can be lead to the SLM without destruction the
meter)
Warm-up time 1 min. (for 0.1 dB accuracy)
Nominal delay less than 3 seconds (between operating of the "Reset- Button"
and beginning of a new measurement)
Typical stabilization time after change in
environmental conditions by 20C
1 hour
Time shift after completion of a
measurement, before a measurement is
shown
< 1 sec
Note: When the instruments are moved from a warm environment with high humidity,
to a colder environment, care should be taken not to produce condensation inside
the instruments. In this case, much longer stabilization periods may be necessary.
Environmental, electrostatic and radio frequency criteria
Effect of humidity < 0.5 dB (for 30%<RH<90% at 40C and 1000 Hz)
Effect of magnetic field < 15 dB (A) or < 25 dB (Z) (for 80 A/m and 50 Hz)
Effect of radio frequency fields < +/-0.5 dB @ 74 dB and 10V/m electromagnetic field
The greatest susceptibility (the least immunity) is achieved when in the SLM the Z filter and time weighting F
are selected and the SPL measurements are considered.
The greatest susceptibility is achieved when the SLM is placed parallel to the radio frequency field.
In addition, if there is an extension cable, the greatest susceptibility is achieved when the SLM and cable is
placed along field and the cable is coil as solenoid.
Effect of electrostatic discharge meets requirements of IEC 61672-1:2013
During electrostatic discharge, the influence of the displayed results could be observed.
No changes in instrument operation state, configuration or stored data corruption were found out.
Effect of ambient pressure < 0.01 dB/kPa
Effect of temperature < 0.5 dB (from -10C to + 50C)
Operating range from -10C to + 50C
Storage from -20C to + 60C
Effect of Vibration
1. For mechanical vibrations with an acceleration of 1 m/s² vertically to the membrane of the microphone for
the frequencies 31,5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 630 Hz, 800 Hz and 1000 Hz increases the low
level of the linear operation range to 70dB for the frequency weighting “A”.
2. For mechanical vibrations with an acceleration of 1 m/s² parallel to the membrane of the microphone for
the frequencies 31,5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 630 Hz, 800 Hz and 1000 Hz increases the low
level of the linear operation range to 65dB for the frequency weighting "A".