Setting The 20 Ma Calibration - Emerson Rosemount Apex Reference Manual

™
APEX and APEX Sentry
Figure 3-8. Key Measurement
Values
3-14
™
Radar Gauge
APEX Radar Gauge
Distance
Lower Null Zone

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?"
Reference Manual
00809-0100-4731, Rev FA
Upper Null Zone Reference
(Min. 19.6 in.) Gauge Height
URV(20 mA)
Process Level
Empty
LRV
Tank
(4 mA)
April 2003
Reference
Line