3500/42 Operation and Maintenance
Configuration Information
19
Gap Full Scale Ranges by transducer type
3300–5 mm Proximitor
3300–8 mm Proximitor
7200–5 mm Proximitor
7200–8 mm Proximitor
7200–11 mm Proximitor
7200–14 mm Proximitor
3300–16 mm HTPS
Nonstandard
3000 (-18V) Proximitor
3000 (-24V) Proximitor
3300 RAM Proximitor
-24 Vdc
15-0-15 mil
25-0-25 mil
300-0-300
µ
m
600-0-600
µ
m
Custom
-24 Vdc
15-0-15 mil
25-0-25 mil
50-0-50 mil
300-0-300
µ
m
600-0-600
µ
m
1000-0-1000
µ
m
Custom
-24 Vdc
15-0-15 mil
300-0-300
µ
m
Clamp Value
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 Recorder Outputs,
Communication Gateway and Display Interface Module are clamped to the
specified value when the proportional value is invalid.
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 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).
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.
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