VC 1100 Overview
VC1100E/overview Version 2 →
© Schenck VIBRO GmbH, D-64273 Darmstadt, November 97 C01 / C02 - C11 / C12 1-9
Monitoring
Each measuring channel has three limit values. Two limit values
for monitoring the vibration level, (lim_1 and lim_2), and one limit
value for Bearing Condition (lim_b). Each limit value can be set
individually.
Each limit value can be set to any value between 10 % and 100 %
of the measuring range. Larger or smaller limit values are not
accepted and will generate an error message
For each limit value an alarm delay time between 1 and 99
seconds can be selected. Limit value exceedance is only
acknowledged if the monitored signal remains above the limit
value for a period of time longer than the selected delay time.
When acknowledged, the event in entered into the 'Log Book', and
if it is configured to do so, the appropriate relay trips
In the 2 channel mode the alarm delay time is related to the
measurement cycle of the appropriate channel. Two cases have to
be considered:
Case 1
The measured value exceeds the limit value and the alarm delay
time is shorter than the remaining measurement time of this cycle.
If the measured value stays above the limit value, the alarm event
is acknowledged after the alarm delay time.
Case 2
The measured value exceeds the limit value and the alarm delay
time is longer than the remaining measurement time of this cycle.
At the end of the measurement cycle, the alarm delay time is
suspended. If the measured value still exceeds the limit value at
the beginning of the next measurement cycle, the alarm delay
time is resumed. This procedure is continued until the end of the
alarm delay time. At this point the alarm event is acknowledged. In
case 2 the alarm delay time is prolonged by the measurement
cycle of the other channel.
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