© Brüel & Kjaer Vibro
● October 2017 ● C106635002 / V01 ●
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© Brüel & Kjaer Vibro
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Instruction VC-850
Technical data
EN
6
Technical data
Vibration measuring parameters:
Velocity in mm/s rms
Measuring range in mm/s
Velocity: 10 mm/s, 20 mm/s, 50 mm/s, or 100 mm/s
(Selectable by DIP Switch)
Frequency range
10 Hz
–
1000 Hz @ -1dB, >-18 dB/octave
Alert & Danger alarm trigger levels
Default:
•
Alert: 35 % of maximum measuring range
•
Danger: 55 % of maximum measuring range
Selectable by DIP-switch: 1-100 % of the maximum measuring range
Alarm Delay
Default: Alert = 3 s & Danger = 1 s
Selectable by DIP-switch: 0 – 100 s
Alarm Hang Time
1 s
Vibration Measurement accuracy
+/-5 % of reading -/+ 2 % of Full Scale setup, typical, @calibration
ref: 100Hz, velocity, 25 ̊C, with current LP and HP filter setup.
DC Output Current
4-20 mA, max load resistance 400
Ω
Alarm output
Two relays with break function: Alert and Danger. Both relays are
latched. (Max 30 V, 100 mA)
Self-Test
A Self-Test can be activated by DIP switch and remotely. The Alert
and Danger relays are only activated after the duration of their
respective delay times if the analogue output during Self-Test is
higher than the alarm trigger level
Sensor watchdog
The VIBROCONTROL 850 is equipped with an internal Watchdog
that continuously checks the functioning of the sensor. At a sensor
failure the Danger relay is activated, and the Alert relay stays
inactivated. Output current will drop to 0 mA.
Power Failure
If the power is cut, all relays will become activated, i.e. break, thus
FAIL SAFE
Measuring direction
Measuring direction axis is parallel to the length axis of the cylindrical
enclosure. See drawing in paragraph 3.22
Summary of Contents for VIBROCONTROL 850
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