c. Plot your readings on the chart in the appropriate areas.
d. Draw a straight line from the established norm number to today's number.
e. If today's number is outside the established limits, circle it.
f. Repeat the procedure in areas of speed, contrast, fog, and developer
g. Determine the points outside the established limits.
h. Run several more sensitometric strips to verify first reading if it was outside
7-10. PREVENTIVE MAINTENANCE
a. Perform this test daily.
b. Plot the data correctly on the chart.
c. Diagnose any possible mechanical problems.
7-11. CORRECTIVE MAINTENANCE
Call the service engineer or the manufacturer's representative.
Section III. SAFELIGHT TEST
The safelight test is performed to find any potential source of "unsafe" light in the
darkroom. Once found, the "unsafe" light can be eliminated.
a. A 10- x 12-inch cassette, unloaded.
b. Opaque material (cardboard for example).
c. Clock with a second hand.
a. Turn off all white and safelights in the darkroom.
b. Load the 10 x 12-inch cassette.