3 trimming paired sections – Rice Lake SURVIVOR PT Series User Manual
Page 25
Trimming and Calibration
21
Figure 6-5. Trimming Load Cell Number Eight.
9. Repeat Steps 7 through 9 if needed to get all Side 2 cells reading within 1% of each other and within 1% of
the Side 1 reference cell.
6.3
Trimming Paired Sections
Now that you’ve trimmed all individual load cells for equal output, pairs of load cells on opposite sides of the scale
must be trimmed for equal sectional output. This process is called section signal trimming.
1. Park the loaded weight cart in the middle of the scale and directly over an imaginary line connecting an
end pair of cells (1 and 8 in the example at right). Record the indicator reading.
Figure 6-6. Trimming Paired Section 1:8.
2. Move the weight cart directly over the next paired cell section (2, 7 in Figure 6-7) and record the indicator
reading.
Figure 6-7. Trimming Paired Sections 2:7, 3:6, and 4:5.
Do the same for the last two paired sections (cells 3, 6 and 4, 5)
.
3. Choose the lowest reading of the four as your reference section, which will not be adjusted. Using the
section potentiometers, reload the other three sections in turn and trim the sections to match the reading of
the reference section. Recheck section readings a second time as the adjustment made may be somewhat
interactive.
4. As a final verification of the load cell trimming, do a final corner check. Place a 1000 lb. weight on one
corner of the platform and record the raw-count reading on the indicator. Move the weight to all the other
corners in turn and record those readings. The readings should be within 1% of each other.
1
4
3
2
8
5
6
7
1
4
3
2
8
5
6
7
1
4
3
2
8
5
6
7