Rack Control Module
TM
Product Manual
Rev. 1.2, May 9, 2014 Page 30
3. Offset Calibration Using a Measured Level
See Figure 3-11 sample depth chart for the following calibration step examples.
a. Fill the tank approximately 3/4 full. Determine the volume by dipping and referring to
a depth chart. An alternative is to place a wire short at a level 1/2 to 2/3 of the probe
depth in an empty tank.
i. For example
1. Flat bottom tank or center of sloped bottom, 55” from the bottom
2. Sloped bottom tank, 26” from the top (81” - 26” = 55”)
3. Volume is 155.00 bbl
b. Turn the gauge power off.
c. Press and hold either the Up or Down button while turning on gauge power.
d. Continue to hold the button down until “CAL” is displayed and then release it.
e. After the normal display start-up sequence, “CAL” will be displayed flashing for
several seconds and then the current volume measured by the TD80. This should be
close to the actual volume.
f. Use the Up and/or Down buttons to adjust the displayed volume to the actual
amount. Then release the buttons.
i. For this example, the display shows 155.0 when offset calibrated
g. Turn the gauge power off.
h. Turn the gauge power on, without holding any buttons.
i. Verify that the display matches the actual volume.
j. Offset calibration is now complete. This procedure should be done seasonally to
maintain the TD80 rated accuracy.
To Next Page
Loading...
