Emerson Rosemount Apex, Reference Manual

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Reference Manual
00809-0100-4731, Rev FA
April 2003
APEX
™
and APEX Sentry
™
Radar Gauge
3-14
Figure 3-8. Key Measurement
Values
Setting the 20 mA Calibration
NOTE
When setting the 20 mA point, be sure to set it at least 19.6 in. (0.5 m) from
the flange face and below the upper null zone. The gauge cannot accurately
measure the product level closer than 19.6 inches.
The 20 mA calibration variable is expressed in terms of the configured output
units. To receive a 20 mA calibration on the Integral Display Option the loop
must be powered. To set the 20 mA calibration:
1. Press NEXT to move the cursor to the digit you want to change.
2. Press UP or DOWN to change the value.
3. Repeat steps 1 and 2 to change the next digit.
4. When finished, press ENTER to set the desired 20 mA calibration.
The menu then displays the message “Finished?”
LEVEL-0005B
Lower Null Zone
Reference
Gauge Height
LRV
(4 mA)
Distance
Empty
Tank
URV(20 mA)
Upper Null Zone
(Min. 19.6 in.)
APEX Radar Gauge
Reference
Line
Process Level