Bently 3500/42M-01-00 vibration monitoring module

Description

3500/42M-01-00 The value that a proportional value goes to when that channel or proportional

value is bypassed or defeated (For example when a problem occurs with the

transducer). The selected value can be between the minimum and maximum

full-scale range values. (1X and 2X Phase Lag have available values of 0 to

359 degrees.) Only the values available from the 3500/42M-01-00 Recorder Outputs,

Communication Gateway and Display Interface Module are clamped to the

specified value when the proportional value is invalid.

3500/42M-01-00 Recorder Output

The proportional value of a channel that is sent to the 4 to 20 mA recorder.

The recorder output is proportional to the measured value over the channel

full scale range. An increase in the proportional value that would be indicated

as upscale on a bar graph display results 3500/42M-01-00 in an increase in the current at the

recorder output.

If 1X Phase Lag or 2X Phase Lag are selected then the two options available

are with and without Hysteresis. If the channel is Bypassed, the output will

be clamped to the selected clamp value or to 2 mA (if the 2 mA clamp is

selected).

3500/42M-01-00 The Hysteresis option helps prevent the Recorder Output from jumping from

Full to Bottom Scale when the phase measurement is near 0 or 359 degrees.

When the Hysteresis option is checked, the recorder signal operates as

follows:

– The recorder output is scaled such that 4 mA corresponds to 0 degrees and

20 mA corresponds to 380 degrees (360 plus 20 degrees).

– The transition of a phase measurement that is increasing does not occur

until the measurement has gone 20 degrees past 360 degrees. At this

point, the recorder signal switches from 20 mA to a signal that

corresponds to 20 degrees or 4.842 mA.

– The transition of a phase measurement 3500/42M-01-00 that is decreasing occurs at 0

degrees (4 mA). At this point, the recorder signal switches from 4 mA to

a signal that corresponds to 360 degrees or 19.158 mA.

Delay

The time which a proportional value must remain at or above an over alarm level

or below an under alarm level before an alarm is declared as active.

Alert

First level alarm that occurs when the transducer signal level exceeds the

selected Alert/Alarm 1 setpoint. This setpoint can be set on the Setpoint

screen. The Alert time delay is always set at one second intervals (from 1 to

60) for all available proportional values.

Danger

Second level alarm that occurs when the transducer signal level exceeds the

selected Danger/Alarm 2 setpoint. This setpoint can be set on the Setpoint

screen.

100 ms option

The 100 ms (typical) option applies to the Danger time delay only and has

the following results:

If the 100 ms option is off ():

– The Danger time delay can be set at one second intervals (from 1 to

60).

– The Danger time delay can be set for up to two available proportional

values.

If the 100 ms option is on (
):

– The Danger time delay is set to 100 ms.

– The Danger time delay can only be set for the primary proportional

value.

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