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Instructions for the CPA-2 and CPP-2 Processors
8. Processing Instructions for Prints Using Magnet Drive
Read and familiarize yourself with the entire process procedure before starting a process.
1 Fill the lower trough (see cutaway illustration below) with water to the shoulder of the bottles. (Or on the CPP-2 until water starts to come out of the overflow elbow.) -- To speed warming of the processor you may fill the trough with water at the process temperature, but check the solution temperatures before starting the process.
2 Turn the On/Off Switch, and the Pump/Heat Switch to 'ON.'
3 Set the temperature control(s) to the desired processing temperature. The CPA-2 heater indicator lamp should light if the temperature in the tempering bath is cooler than the temperature set. When the lamp turns off (and then cycles on and off), the processor has reached its operating temperature. The CPP-2 temperature display will show when the processor has achieved the correct temperature.
Note:
(For the CPA-2 only.) When the temperature of the processor has stabilized, the heater indicator lamp (see illustration 4.) will cycle on and off. The thermostat works to maintain the proper temperature. Check the developer temperature with the Color Thermometer (JOBO accessory #3321) and adjust the temperature control if necessary.
Always monitor for correct process temperature in a bottle or graduate containing chemicals or water. The trough temperature will be several tenths of a degree higher than the temperature maintained in the bottles or graduates. Monitoring the temperature of water or chemicals poured out of a tank or drum, or coming out of the JOBO Lift drain hose, is not an accurate indication of the process temperature.
The temperature of the actual process (inside the tank or drum) is equal to the temperature stabilized in the bottles or graduates, not the temperature of the trough or post-processing effluent.
The following steps can be completed while waiting for the processor to reach operating temperature.
4 Chemicals should be mixed, and bottles filled and in place, before turning on the processor. This sequence ensures that the chemicals will reach the processing temperature at the same time as the tempering bath. If the bottles or graduates are put in the processor (or refilled) after heating has started, check their temperature after the processor is at the correct temperature.
Caution: Do not start a process until all solutions are at the required processing temperature.
5 Be sure you have enough rinse water available. If your process does not require the use of all six bottles, the unused bottles may be used for rinse water. They are kept at the processing temperature by the lower trough. If you do not have room in the processor, and require additional rinse water, use one or more bottles or graduates filled with water at or about 10°F (5°C) over the processing temperature. For most color processes, rinse water should be within ± 8° to 10°F (4° or 5°C.) The cooling that takes place before use will not drop the temperature out of tolerance. Black and white processes usually use room temperature rinse water.
6 Adjust the roller block to the drum size being used. Press the roller block onto the raised ridge in the upper trough until it snaps in place. Position it so the black body of the drum being used rests on the rollers as far to the right under the tank as possible. Do not allow the drum to rotate on the red ring.
[1500 Series]
[2500 and 2800 Series]
[3000 Series]
7 Load your drum in the dark. (See instructions included with the drum for details.)
Note:
If you are using a standard size photo paper (5 x 7", 8 x 10", 11 x 14", 16 x 20") it will fit between the ridges in the drum. Multiple sheets are separated by these ridges. It is not necessary to use the paper separators that used to be supplied with the drums. Only one sheet of paper, (regardless of size) may be placed inside the 1526 Combo Drum, as it has no ridges.
8 Turn the Rotation Motor Control to 'P.'
9 Couple the drum to the magnet coupling (see illustration below).
Note:
A Practice with an empty drum until you can complete the coupling with a smooth, even motion.
B It is easiest to make the coupling when the drive magnet on the processor is near its stopping point during direction reversal.
C Observe the drive magnet. As it reaches the end of a rotation cycle, move the base of the drum up to the drive magnet with the drum in a horizontal position. You will feel the magnet try to 'grab' the drum. Let go of the drum, and it will attach to the drive magnet and begin to rotate.
D To uncouple, grasp the drum body and lift the free end straight up, at a right angle to the processor. This motion will break the magnetic bond, and the drum can be removed from processor.
10 Be sure the water level is adjusted high enough in the upper trough to bathe the drum with water (1/8" to 1/4", or 3 to 6 mm, above the bottom of the drum.) Do not fill too high. The lid end of the drum will float.
Note:
A When doing a pre-rinse, allow the drum to rotate in the upper trough with the right amount of rinse water for the specified pre-rinse time.
B At the end of the pre-rinse step remove the drum from the processor. Remove the red cap. Pour out the pre-rinse water.
C Pour in enough chemical for the drum and paper you are using. (See instructions included with the drum) Replace the red cap. Start timing the step.
Caution: Many photographic solutions can produce gasses that cause a pressure buildup inside the drum. The red membrane cap is constructed with a flexible membrane section at its center. Press down the center of the red cap before putting the cap on the lid. Pressure generated will move the depressed membrane in the cap, rather than forcing the cap off the drum.
D About ten seconds before the end of the time for the chemical step, remove the drum from the processor. Remove the red cap. Pour out the used solution.
E Pour in the next chemical (or rinse, if specified). Replace the red cap, with its center depressed. Start timing, and couple the drum to the processor.
F Continue this sequence of emptying and filling until the process is complete.
G For the pre-rinse step only, use one filling of water for the drum. Do not change the rinse water for the duration of this step. Other rinse steps are done in the drum, using a series of 30-second rinses to make up the total rinse time required. (An example would be: 2 minute rinse = 4 x 30-second rinses.)
11 To Process Prints: Refer to instructions for the specific process you are using (see Section 3) which will cover pre-rinse or pre-warm times, as well as times for each of the processing steps, rinses, etc.
Note:
The lid of the print drum is fitted with a light-trap beaker. The beaker keeps solutions off the paper, as long as the drum is vertical. Once the drum has been turned horizontal, immediately couple it to the processor (to ensure even development). Practice will help you take a drum from a vertical to horizontal coupled position in an easy fluid motion. If you do the final rinse off the processor, rinse the drum thoroughly before drying. The beaker should be removed from the lid when drying the drum.
12 Rinse Water: Rinsing (washing) of photographic material is an important part of the process. Insufficient rinsing can adversely affect processes and decrease longevity of the final results.
Three factors affect rinsing: The water quantity use, the number of water changes, and the rinse time. For best results, use the amount of rinse water listed in the chart below. Use of rinse amounts higher than listed is discouraged, because the decreased agitation inhibits the rinsing process. The water should be changed about every thirty seconds for the duration of the rinse step. The time of each rinse step must be determined for each process. Consult Section 3 on Specific Processes, or the chemical manufacturer's instructions for details.
In a rinse step, the number of water changes is more important than the timing. In virtually all processes, the rinse time may be longer without causing any problems. For best results, do not shorten rinse times or reduce the number of water changes.
Caution: In processing of Ilfochrome materials, do not increase the first or second rinse times.
Rinse water volumes:
If the chemical volume Then the minimum rinse
is between: water volume is:40 ml - 260 ml 260 ml
300 ml - 470 ml 500 ml
540 ml - 600 ml 600 ml
Go To:
1. Processor Specifications; CPA-2 and CPP-2
2. Safety First
3. Differences Between the CPA-2 and the CPP-2 Processors
6. Processor Maintenance and Tips
7. Processing Instructions for Film Using Magnet Drive
8. Processing Instructions for Prints Using Magnet Drive
9. Processing Using the JOBO Lift Accessory
10. Processing Instructions With the JOBO Lift Accessory
11. Precautions for Film and Paper Processing
12. Additional Processing Information
13. Spare Parts
14. Fuse Replacement
If you have any questions, contact us utilizing one of the following methods:
Equipment or Processing Questions:
- Phone: Customer Service Department (734) 205-9421
e-mail: tech@jobo-usa.comRepair Questions:
- Phone: Repair Department (734) 205-9420
- e-mail: repair@jobo-usa.com
JOBO Contacts
- Telephone (734) 677-6989
- Fax: (734) 677-6963
- Postal address
- P.O. Box 3721, Ann Arbor, MI 48106
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- 4401 Varsity Drive, Suite D, Ann Arbor, MI 48108
- Electronic mail
- Sales: sales@jobo-usa.com
- Equipment & Processing Questions: tech@jobo-usa.com
Repair Information: repair@jobo-usa.com- Shipping or Billing Questions: help@jobo-usa.com
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This page last updated on 02/11/03