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Maintenance
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Differential Expansion Default OK Limits Table
Transducer
Lower OK Limit
(volts)
Upper OK Limit
(volts)
25 mm w/o barriers
-1.30 to -1.40
-12.5 to -12.6
35 mm w/o barriers
-1.30 to -1.40
-12.5 to -12.6
50 mm w/o barriers
-1.30 to -1.40
-12.5 to -12.6
Note: Assume ±50 mV accuracy for check tolerance.
5.1.7 Eccentricity
Channels
The following sections describe how to test alarms, verify channels, and test OK
limits for channels configured as Eccentricity. The output values and alarm
setpoints are verified by varying the input Eccentricity signal level (both peak to
peak amplitude and DC voltage bias) and observing that the correct results are
reported in the Verification screen on the test computer.
Eccentricity channels can be configured for the following channel values and
alarms:
Channel Values
Alarms
Over
Under
Peak to Peak
X
Gap
X
X
Direct
X
X
5.1.7.1
Test Equipment and Software Setup - Eccentricity
The following test equipment and software setup can be used as the initial setup
needed for all the Eccentricity channel verification procedures (Test Alarms,
Verify Channels, and Test OK Limits).
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