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9. Analog Output Module Adjustments
This section explains how to adjust and calibrate the Temposonics II LDT system using an AOM.
The AOM includes adjustments for null (zero), and full-scale (span). The adjustments compensate for the
following:
• Differences between transducer gradients.
• Small offsets in the magnet position due to mounting.
• Wear in the moving parts of the mechanical system to which the magnet is attached.
In cases where a coupler device is used for adjusting the magnet, the coupler is used for coarse adjust
ments of both null and scale, while the AOM is used for fine adjustments.
9.1 Nominal Range of Adjustment
Null: Minimum: ± 3/8 in.
Maximum: Up to 10% of total stroke or ±2 inches, whichever is smaller
Full-scale: ± 2% of total stroke
Figure 9-1 (next page) shows the location of position adjustments and terminal boards on the AOM.
NOTE:
Null adjustment has an overall effect on
total scale adjustment. However, scale
adjustment has no effect on null
adjustment.
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