Fluke Biomedical 07-444 - Manual (Page 41)

Calibration
Calibration
6
6-1
Section 6
Calibration
The 5-Step Reference Step Wedge is used to calibrate the Densitometer. The calibration point is
generally Step 4.
The following procedure allows calibration of the optical density of the Scanning Densitometer:
1. Be sure the Power Switch is in the OFF position.
2. Press and hold the ENTER push-button while turning the Power Switch to the ON position. The
following message will be displayed:
Self testing...
3. When the unit has completed the self-test, the following Setup Menu label will be displayed:
Single.
4. Press or to scroll through the Setup Menu until Calibrate is displayed.
5. Press ENTER. The current calibration density is displayed with the cursor under the first digit of the
density value:
Density = X.XX
6. Edit the density value as follows:
a. Press or to increase/decrease the value at the cursor.
b. Press ENTER to select the displayed value; the cursor will move to the second digit.
c. Press or to increase/decrease the value at the cursor.
d. Press ENTER to select the displayed value; the cursor will move to the third digit.
e. Press or to increase/decrease the value at the cursor.
f. Press ENTER to select the displayed value; the unit will auto zero and display the following
message:
Auto zeroing...
7. After zeroing is complete, the following message will be displayed:
ENTER to read.
8. Position the step wedge so that the area to be measured is over the aperture, with the emulsion
side UP.
9. Press ENTER. The following message will be displayed:
Calibrating....
10. When calibration is complete, Calibrating done will be displayed briefly. The display will then return
to the Setup Program Menu and Facility Title will be displayed.
11. Scroll through the Setup Menu until the message SINGLE is displayed. Measure each step to
verify the correct calibration.
After Auto Zeroing is completed, the measurement
must be made within approximately 30 seconds.
NOTE