Reference Manual
00809-0100-4731, Rev FA
April 2003
3-13
APEX
™
and APEX Sentry
™
Radar Gauge
1. Press UP until the display shows the reference height option you want to
use.
2. Press ENTER to select (reference) Gauge Height or Actual Level.
If the dimension from the reference line (bottom) of the vessel to the
gauge is unknown, do one of the following:
• • If the tank is empty and has a flat bottom, enter “0” for the
actual level.
or
• • Use the vessel drawing to determine the Reference Gauge Height.
or
• • Use another known reference level measurement, such as a hand
dip, and enter that value for Actual Level. The gauge will then calculate
its height.
3. Press NEXT to move the cursor to the digit you want to change.
4. Press UP or DOWN to change the value.
5. Repeat steps 3 and 4 for each digit.
6. When finished, press ENTER to set the value of the Reference Gauge
Height or Actual Level.
The menu will continue to the next step.
Setting the 4 mA Calibration
The 4 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 4 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 4 mA calibration.
The menu then displays the 20 mA calibration variable.
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