4-8 P/N 9-500-0255
Service Manual
Chapter 4: Calibrations and Performance Checks
Compression System Calibration Procedures
3.2 Compression Thickness Calibration
This procedure calibrates the compression thickness sensing circuits for accurate thickness
display. Note that this procedure requires that the compression force be calibrated first.
Always perform the compression thickness calibration procedure with an accurately
calibrated compression force display.
1. Set the unit for the service mode (S2 switch 1 = ON). Access Calibration Screen #3 after
power up. Remove any installed accessory from the Image Receptor Support Device.
2. Highlight the CF Cal data field using the Scroll keys. Press a Change key until the field
reads: “Thickness”.
3. Place 5.0 cm of acrylic on
the image receptor support
device. Install the 18 x 24
cm compression paddle on
the compression device.
4. Use motorized compres-
sion to lower the compres-
sion paddle until it just
touches the acrylic. Use
manual compression to
apply 133.5 N (30 lb) of
force onto the acrylic.
5. Press Reset + Comp.
Release together to send
the compression thickness
calibration data to the
microprocessor.
Figure 4-2: Compression Thickness Calibration Setup
6. Highlight the CF Cal data field using the Scroll keys. Press a Change key until the field
reads: “Verify”.
7. Press Reset + Comp. Release together to send the compression thickness calibration data
to the microprocessor.
8. Raise the compression paddle, remove the acrylic from the receptor support, then return
the unit to the user mode (S2 switch 1 = OFF).
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