Schenck Vibrocontrol 110 C01 Manual de usuario
VC 1100 CONTENTS
VC1100E/contents Version 2 →
© Schenck VIBRO GmbH, D-64273 Darmstadt, November 97 C01 / C02 - C11 / C12 1
Contents
VIBROCONTROL 1100
C01 / C02 / C11 / C12
1 Overview
2 Technical Data
3 Connectors and Interfaces
4 Built-in Operating Panel and Display
Error messages
5 List of Setup Parameters
6 Installation and Commissioning
CONTENTS VC 1100
Version 2 →contents/VC1100E
2C01 / C02 - C11 / C12 © Schenck VIBRO GmbH, D-64273 Darmstadt, November 97
Instrument types - Overview
Instrument Type Supply Voltage Bearing Condition
VC 1100 C01 230 V AC
115 V AC YES
VC 1100 C02 24 V DC YES
VC 1100 C11 230 V AC
115 V AC NO
VC 1100 C12 24 V DC NO
The instrument types C01, C02, C11 and C12 listed in the table above are described in
the VIBROCONTROL 1100 documentation.
Apart from the bearing condition, which is not applicable to the instrument types C11 and
C12, the descriptions for all instruments are the same.
VC 1100 Overview
VC1100E/overview Version 2 →
© Schenck VIBRO GmbH, D-64273 Darmstadt, November 97 C01 / C02 - C11 / C12 1-1
1 Overview
VIBROCONTROL 1100 is a 2 channel microprocessor controlled
machine condition monitor. Vibration velocity transducers or vibra-
tion acceleration transducers (accelerometers) are used to sense
the vibrations from a machine.
VIBROCONTROL 1100 is a compact machine monitor. All com-
ponents, like power supply, connectors, signal conditioners, micro-
processor and operator panel are integrated to one splash- proofed
housing.
Figure 1-1: Top view of a VIBROCONTROL 1100 with cover removed
VIBROCONTROL 1100 is complete; there are no options. Three
alarm relays, one OK-relay, two analog outputs, two buffered out-
puts, remote I/O interface, and signal conditioners are built-in.
There are no jumpers or potentiometers. All functions are com-
pletely microprocessor controlled and are configured using the
built-in operator panel or via the remote interface with a computer
or process controller.
The wiring is done through removable terminal strip connectors.
Vibration analyzers or data collectors can be connected to the
buffered outputs without interrupting the monitoring functions.
Overview VC 1100
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1-2 C01 / C02 - C11 / C12 © Schenck VIBRO GmbH, D-64273 Darmstadt, November 97
Measured Values
Displayed Parameters
The measured values can be displayed in metric or English units:
Measured Parameter Abbreviation Unit
Vibration Displacement smm mils
Velocity vmm/s ips
Vibration Acceleration a g m/s2
If accelerometers are used, the Bearing Condition of rolling ele-
ment bearings can be measured and monitored.
The unit for Bearing Condition is BCU.
Bearing Condition - - - BCU
BCU Scaling Factor
Due to the BCU scaling factor, the BCU measuring result can be
multiplied with a factor. This factor is determined with parameter
J19 for channel A and J20 for channel B in the range between 0.1
and 10. Factor 1 displays the measuring result not scaled.
The BCU scaling factor makes it possible to set the measuring
result to a defined inital value in order to compare several
measuring points. The BCU scaling factor is to be employed
preferrably with new bearings.
Note:
The selected scaling factor must be considered when setting the
BCU limit value. If for instance the measuring result is divided by
two due to the scaling factor, also the limit value must be divided
by two.
VC 1100 Overview
VC1100E/overview Version 2 →
© Schenck VIBRO GmbH, D-64273 Darmstadt, November 97 C01 / C02 - C11 / C12 1-3
Example how to use the BCU scaling factor
In case of BCU measurements, the measuring result depends on
various factors, e.g. on the place of the pickup installation, on the
type of connection (e.g. tightening torque of the pickup) etc. The
consequence may be different measuring results with identical
machines and the same bearing condition units.
To enable a clear comparison of the single measuring points
(change of the bearing condition over a longer measuring period),
by means of the BCU scaling factor (parameters J19, J20) the
measuring results can be set to the same initial value (desired
value at the beginning of the measurement) for each measuring
point.
Carry out scaling
Input the scaling factor 1 for the respective measuring points.
Acquire the current measuring result.
From the desired BCU initial value and the current measuring
result of the respective measuring point, the BCU scaling factor
J19 or J20 is calculated with the following formula:
After the parameter input of all scaling factors, the re-spective
measuring point must display the desired BCU initial value.
Jdesired initial value
current measuring result
19 =
Overview VC 1100
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1-4 C01 / C02 - C11 / C12 © Schenck VIBRO GmbH, D-64273 Darmstadt, November 97
BCU averaging
The BCU value may vary depending on the operating conditions of
a machine, for example due to varying loading conditions.
A defective anti-friction element which regulary changes its
position in such a way that the damaged part comes into contact
with the bearing running surface only after several revolutions, will
also cause varying BCU values.
Variations of that kind do not allow the conclusion that the bearing
is damaged.
The measured value can be averaged by means of a filter with
settable time constant (averaging time 10 ... 3600 secs.) in order
that these "variations" (which do not represent the normal
condition of the machine) don't cause an alarm message.
The bigger the selected averaging time
− the more stable the measured value (particularly important for
trend considerations)
− the more delayed the response behaviour of the limit value
monitoring.
The averaging be switched on and off separately for channel A
and channel B (parameters J15 ... J18).
VC 1100 Overview
VC1100E/overview Version 2 →
© Schenck VIBRO GmbH, D-64273 Darmstadt, November 97 C01 / C02 - C11 / C12 1-5
Measuring Ranges
The measuring ranges are microprocessor controlled and can be
selected continuously within the limits defined in the following
table:
Transducer : Vibration acceleration pick-up
Signal detection : Root mean sqare value
Measured Parameter Measuring Range Unit
Min Max
Vibration
Acceleration 0 ... 4.00
0 ... 0.40 0 ... 800
0 ... 80.0 m/s2
g
Vibration Velocity 0 ... 5.00
0 ... 0.20 0 ... 999
0 ... 40.0 mm/s
ips
Transducer : Vibration Velocity pick-up
Signal detection : Root mean sqare value
Measured Parameter Measuring Range Unit
Min Max
Vibration Velocity 0 ... 5.00
0 ... 0.20 0 ... 150
0 ... 6.00 mm/s
ips
Vibration
Displacement 0 ... 50.0
0 ... 2.00 0 ... 333
0 ... 13.3 µm
mils
Multiply values by 1.41 for peak-values and by 2.82 for peak-to-
peak values. The largest acceptable number is 999.
The measuring ranges for BCU-Monitoring are independent of the
measuring ranges for vibration monitoring.
Measured Parameter Measuring Range Unit
Min Max
Bearing Condition 0 ... 1.00 0 ... 140 BCU
Overview VC 1100
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1-6 C01 / C02 - C11 / C12 © Schenck VIBRO GmbH, D-64273 Darmstadt, November 97
Filters
Machine vibrations are sensed by the vibration velocity trans-
ducers or accelerometers. Which pickup to use depends on the
application. The following table lists the filters that may be used
with the different measured parameters and pickup types:
Measured Parameter Transducer Filter
va
Vibration displacement x10 Hz ... 1000 Hz
Vibration Velocity x x 1 Hz ... 1000 Hz
x x 3 Hz ... 1000 Hz
x x 10 Hz ... 1000 Hz
x10 Hz ... 10 kHz
Vibration Acceleration x3 Hz ... 1000 Hz
x10 Hz ... 1000 Hz
x3 Hz ... 10 kHz
10 Hz ... 10 kHz
Bearing Condition x15 Hz ... 50 kHz
Transducer : v = Vibration Velocity Transducer
a = Accelerometer
* ) Fulfills the requirements of International Standard ISO 2372
Signal Conditioning and Signal Detection Type
The built-in signal conditioners are microprocessor controlled.
Gain factors, filters, and the integrator are set automatically. The
settings are determined by the microprocessor from the
configuration.
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.
Overview VC 1100
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1-8 C01 / C02 - C11 / C12 © Schenck VIBRO GmbH, D-64273 Darmstadt, November 97
The following table shows the settling times and the cycle times
(sum of settling and measuring time) for different functions and
setups of the Vibration Signal Conditioner. Different setups can be
used for channel A and B. The total cycle time is the sum of the
cycle times for channel A and B.
Activated Function Settling Time Cycle Time
High Pass Filter: 1 Hz 1.75 s 4.75 s
High Pass Filter: 3 Hz 1.00 s 4.00 s
High Pass Filter.: 10 Hz ISO 1.25 s 4.25 s
High Pass Filter: Special 1.75 s 4.25 s
Integrator 6.00 s 9.00 s
Linearization Circuit: 5.75 s 8.75 s
If more than one function has been selected, the function with the
longest settling time determines the total settling time.
2 Channel Monitor (Vibration and Bearing Condition)
Since VIBROCONTROL 1100 is equipped with a Bearing Condit-
ion Detector, the measurement of Bearing Condition is indepen-
dent of the vibration measurement.
The settling time is 2.75 s and the measuring time is 1.25 s.
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