Frequency range
For the acceleration measurement (+/- 10%) 1 Hz 5 kHz (in the linear measurements
with the HP or HP1 filter)
Note: With the application of another vibration transducer, the frequency range given above for the
HP filter can be different (i.e. wider).
See Chapter C.4 for the Wh and VelMF filters characteristics
Basic error for the acceleration measurement < 0.5 dB
Calibration
Direct: by the measurement of the standard signal generated by the external vibration calibrator.
Indirect: by the declaration of the transducer's sensitivity (according to the calibration chart).
Accelerometer input
Connector TNC
Impedance 40 k / 100 pF (typical)
Vibration transducers powering IEPE type, 28 V / 1.5 mA current source
Range of the measured voltage
Range LOW 1 V
RMS
(120 dB related to 1 µV
RMS
)
Range HIGH 7 V
RMS
(137 dB related to 1 µV
RMS
)
Maximum input voltage
SVAN 979 is the instrument with the II security class according to the international standard IEC 348.
The input voltage should be within the 30 V Peak – Peak
RMS detector (Linear averaging)
• Digital “True RMS“ with Peak detection
• Resolution 0.1 dB
• Range 327.7 dB
• Crest Factor unlimited for signals within 20 kHz band.
Overload detector
The instrument has the built-in overload detectors. The overload in the measurement channel (in its analogue
part) and the overload of the analogue / digital converter are both detected. The “overload” indication is when
the input signal amplitude is 0.5 dB above the declared “Peak measurement range”.
Underrange detector
The instrument has the built-in underrange detector. The “underrange” indication appears when the minimum
value of the RMS detector output goes below the specified lower linear operating range.
Analogue/Digital conversion 24 bits resolution.
To Next Page
Loading...
