3500/42 Operation and Maintenance
Configuration Information
53
Corner Frequencies
High-pass Filter
A four-pole filter that must be at least two octaves away from the Low-pass
Filter.
HPF = High-pass Filter; LPF = Low-pass Filter
HPF
≤
( LPF / 4 )
Low-pass Filter
A four-pole filter that must be at least two octaves away from the High-pass
Filter.
HPF = High-pass Filter; LPF = Low-pass Filter
LPF
≥
( HPF * 4 )
Delay
The time which a proportional value must remain at or above an alarm level or
outside an acceptance region before an alarm is declared as active.
Alert
First level alarm that occurs when the transducer signal level exceeds the
selected value. The Alert time delay is always set at one second intervals for
all available proportional values.
Danger
Second level alarm that occurs when the transducer signal level exceeds the
selected value.
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.
- The Danger time delay can be set for all 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.
Trip Multiply
The value selected to temporarily increase the alarm (Alert and Danger) setpoint
values. This value is normally applied by manual (operator) action during startup
to allow a machine to pass through high vibration speed ranges without monitor
alarm indications. Such high vibration speed ranges may include system
resonances and other normal transient vibrations.
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