1. INTRODUCTION
The SVAN 974 is an all-digital Vibration level meter (VLM) as well as a real
time 1/1 or 1/3 octave and FFT analyser. The instrument is designed for
general vibration measurements, industrial machinery monitoring,
occupational health and safety monitoring. The accelerometer input supports
different types of vibration sensors, including IEPE, Charge and Direct. Parallel
to the vibration measurement, the RPM measurement with dedicated
tachometer can be performed.
Three vibration user configurable profiles allow parallel measurements with
independently defined frequency filters and RMS detector time constants.
Each profile provides significant number of results (like RMS, Ovl, Peak, P-P
and MTVV). Advanced time history logging for each profile provides complete
information about the measured signal using the SD-card fitted in the bottom
of the meter and can be easy downloaded to any PC using the USB interface
and SvanPC++ software.
All required weighting filters: HP1, HP3, HP10, Vel1, Vel3, Vel10, VelMF, Dil1,
Dil3, Dil10 and Wh for general vibration measurements (like acceleration,
velocity and displacement), including the latest ISO 20816-1:2016 standard,
are available with this instrument.
Using the computational power of its digital signal processor the SVAN 974
instrument can, simultaneously to the meter mode, perform the real time
1/1 Octave or 1/3 Octave analysis including calculations of statistical levels.
Time domain waveform signal recording on the SD-card is available as an option and advanced trigger and alarm
functions are available in the standard version of this instrument.
A fast USB 1.1 interface (12 MHz) creates a real-time link for the PC "front-end" application of the SVAN 974
instrument. The measurement results can be downloaded to PC using all the interfaces mentioned above.
The instrument is powered from four AA standard alkaline or rechargeable batteries (i.e. NiMH – a separate
charger is required) or from the USB interface. Robust and lightweight design enhances the exceptional features
of this instrument.
1.1. SVAN 974 - Vibration Level Meter & Analyser
• General Vibration measurements (acceleration, velocity and displacement) and optionally HVM meeting
ISO 20816-1:2016 standard in the frequency range depending on the parameters of the attached
accelerometer, i.e. with SV 80 general purpose transducer is equal to 0.5 Hz ÷ 14 kHz.
• Parallel RMS, MTVV or Max, Peak, Peak–Peak measurements.
• HP, HP1, HP3, HP10, Vel1, Vel3, Vel10, VelMF, Dil1, Dil3, Dil10 and Wh weighting filters.
• 1/1 Octave and 1/3 Octave real time analysis - 15 filters with centre frequencies 1 Hz ÷16 kHz, and 45
filters with centre frequencies 0.8 Hz ÷ 20 kHz, Type 1 IEC 61260-1: 2014.
1.2. General features of SVAN 974
• Advanced Data Logger function
• FFT analyser
• 1/1 and 1/3 octave band analyser (option)
• Time domain waveform signal recording (option)
• Advanced trigger and alarm functions
• USB 1.1 Client interface (real time PC "front end" application supported)
• Integration time programmable up to 24 h
• Power supply by four AA rechargeable or standard batteries
• Hand held, light weight and robust case
• Easy to use with menu driven user interface
• Dedicated input for a Tachometer
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