VC 1100 Overview
VC1100E/overview Version 2 →
© Schenck VIBRO GmbH, D-64273 Darmstadt, November 97 C01 / C02 - C11 / C12 1-7
Linearization
The characteristic of vibration velocity transducers is not linear in
the lower frequency range, i.e. with frequencies around 10 Hz.
VIBROCONTROL 1100 corrects this nonlinearity with a built-in
linearization circuit (Standard fo= 8 Hz / the special design fo=
15 Hz is identifield by an adhesive label inside the instruments).
The result is a linear frequency response characteristic for the total
measuring system down to 1 Hz.
The linearization circuit can be activated or deactivated by means
of parameter input (IO6).
Settling Time and Cycle Times
Electronic components like amplifiers, filters, etc. need a certain
amount of time to provide the correct output signal after the input
signal has been switched or changed.
This time is called settling time. Components used to measure low
frequencies have longer settling times than components used to
measure higher frequencies.
VIBROCONTROL 1100
can be configured as a single channel monitor or a 2 channel
monitor.
Single Channel Monitor (Vibration and Bearing Condition)
Operating as a single channel monitor, settling times are not
required, since the vibration signal is not switched from channel A
to channel B. The configuration, filter characteristic and gain, etc.
of the Vibration Signal Conditioner and the Bearing Condition
Detector do not need to be changed; therefore the vibration signal
is measured continuously.
Cycle Time: Built-in Display 0.5 s
Alarm level comparison 0.25 s
2 Channel Monitor (Vibration)
The vibration signals of channel A and B are switched alternately
(multiplexed) to the Vibration Signal Conditioner.
For each switch between channel A and B, the Vibration Signal
Conditioner is automatically re-configured and settling times are
required.
The total time for one measurement consists of the settling time
and the measurement time. The measurement time is always 3
seconds.
Outside the measuring times, the current display values of the
other channel are frozen, the current measured value, however, is
monitored in intervals of 0.25 seconds.
