TM 5-3895-374-10
......................................................................................................................................................... Meters by Average Value
CORRECTING A ZERO READING
The following procedure is given for a belt scale. With the computers built in belt scale auto zero capability, this procedure
may never be required. The sequence describe might be applicable to the zero adjustment of other meters.
1)
Print a current copy of the Meter Calibration values. (keystrokes 8659)
2)
Start the belt scale. Run it empty for a minimum of 15 minutes or as long as necessary to establish a stable
reading.
3)
Select the METER CALIBRATION BY AVERAGE VALUE display (keystrokes 8652). See Figure 8652.1 Place the
asphalt switch in the DIVERT LOCKED position!
4)
Restart the averaging interval by selecting Option 5. If the belt scale is stopped and restarted or material falls on
the belt or anything else causes an erratic signal during the averaging interval, the averaging process should be
restarted by selecting Option 5.
5)
Let the data average for greater than 180 seconds and until the displayed rate is stable.
6)
Select Option 8 to Correct Average Readings if the measured rate is non-zero. See Figure 8652.2
7)
Select and change to zero (0) the actual values of only those meters (scales)for which this test applies.
8)
Verify that no other zero or any span numbers have changed from the data printed in Step 1.
9)
As necessary verify the new zero by repeating this procedure starting at Step 3.
page F - 71
SYSTEMS Equipment Corp. 8/31/89 Page (38)
