SV 977D User Manual - Appendixes
Note: When another vibration transducer is used, the frequency range given above for the HP filter
can be different.
Maximum peak voltage 30 V Peak-Peak (Maximum peak voltage of input sinusoidal
signal, which can be applied to the VLM without destruction the
meter)
RMS detector (Linear averaging)
• Digital “True RMS“ with Peak detection
• Resolution 0.1 dB
• Range 327.7 dB
• Crest Factor unlimited (for signals in 20 kHz band)
Reference conditions as per ISO 8041-1:2017
• Reference frequency 79.58 Hz
• Reference temperature +23°C
• Reference relative humidity 50 %
• Reference range High.
Calibration (electrical)
Calibration level 100 mV
RMS
(140 dB re 0.01 µV)
Test frequency 79.6 Hz
Weighting filter HP10
Basic accuracy < 0.1 dB (for the temperature T=+23°C 5°C for the sinusoidal
signal)
Measurement deviation < 0.2 dB (when the temperature is from -10°C to +50°C for the
sinusoidal signal)
Overload detector
The instrument has the built-in overload detectors. Both A/D converter and input amplifier overload conditions
are detected. The overload in the measurement channel (in its analogue part) and the overload of the
analogue / digital converter are both detected. The “overload” indication appears when the input signal
amplitude is 0.5 dB above the declared “Peak measurement range”.
Warm-up time 1 min. (for 0.1 dB accuracy).
Effect of humidity < 0.5 dB (for 30%<RH<90% at 40C re Reference conditions)
Effect of temperature < 0.5 dB (from -10C to + 50C)
Effect of magnetic field < 5 µV
RMS
(A) or < 20 µV
RMS
(Z) (for 80 A/m and 50 Hz)
Effect of vibration < 0.1 dB (from 20 Hz to 1000 Hz at 1 m/s
2
)
Electrostatic and radio frequency criteria – see Chapter C.1.1
To Next Page
Loading...
Need help?
General
