SV 977D User Manual - Appendixes
• Dil3 from 0.2 Hz to 510 Hz
• Dil10 from 1 Hz to 2050 Hz
Special filter
Filter for the evaluation of the machinery condition:
• VelMF from 0.2 Hz to 4100 Hz; conforms with ISO 10816 (see Chapter C.5 for the frequency response
characteristics)
Environmental, electrostatic and radio frequency criteria
Note: In the measurement conditions with the strong electromagnetic disturbances (e.g. near the
high-voltage transmission lines) the lower measurement limit can be drastically shifted as the result
of the external field influence on the measurement cables. In such cases, the careful shielding of the
measurement cables is strongly recommended. It is worth to underline that the estimation of the
external influence can be performed in-site by the observations of the measurement signal spectrum.
Effect of humidity < 0.5 dB (for 30% < RH < 90% at 40ï‚°C and 1000 Hz)
Effect of radio frequency fields meets requirements of ISO 8041-1:2017
The greatest susceptibility (the least immunity) is achieved for RMS measurements with the HP1 weighting
filter.
The greatest susceptibility is achieved when the VLM and accelerometer with cable is placed along field and
the cable is coil as solenoid.
Effect of electrostatic discharge meets requirements of ISO 8041-1:2017
During electrostatic discharge, the influence of the displayed results could be observed.
No changes in the instrument operation state, configuration or stored data corruption were found out.
Effect of temperature < 0.5 dB (from -10ï‚°C to + 50ï‚°C)
Effect of vibration < 0.1 dB (measured at the instrument vibration 1 m/s2 in the
2 kHz band)
Temperature range
Operating from -10ï‚°C to + 50ï‚°C
Storage and transportation from -20ï‚°C to + 60ï‚°C
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