Rite Life Sensitometer 394 User Manual download pdf (Page 16)

Processor Troubleshooting

When troubleshooting out of tolerance processor

conditions, use Speed Index as the primary guide.

Speed Index is the most predictable indicator for all

film types. Base+Fog is predictable, but is the least

sensitive. Contrast Index reacts predictably for a given

set of film conditions but may vary from film to film.

Listed below is a chart showing Speed Index and

Base+Fog reactions to common processor problem

conditions.

As Control Records become more complete for a given

film, the relationships between Contrast Index and

Processor Conditions will become apparent. Always

note the reason for out-of-tolerance processor condition

on the Control Record.

NOTE: When out-of-tolerance conditions are noticed,

always verify results with another test film before

making any processor adjustments.

Speed Index Base+Fog Possible Cause

Developer

temperature too high.

Developer over

replenished.

Improper safe lighting.

High High or

Normal

Improper solution mix.

Developer

temperature too low.

Developer under

replenished.

Inadequate developer

circulation.

Improper solution mix.

Low Low or

Normal

Contaminated

developer.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 27 28

No comments

Rite Life Sensitometer 394 User Manual Page 16