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Instructions for the CPA-2 and CPP-2 Processors
7. Processing Instructions for Film Using Magnet Drive
Read and familiarize yourself with the entire process procedure, before starting the process.
1 Fill the lower trough 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 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 the chemicals will reach the processing temperature about 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. Do this 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 10º F (5º C) over the processing temperature. For most color processes, rinse water should be within ± 8º to 10º F (4º or 5º 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 (see illustrations, below) to the tank size being used.
[1500 Series]
[2500 and 2800 Series]
[3000 Series]
Press the roller block onto the raised ridge in the upper trough until it snaps into place. Position it so the black body of the tank being used rests on the rollers as far to the right under the tank as possible. Do not allow the tank to rotate on the red ring.
7 Load your tank in the dark. Note the volume of chemicals required for the tank and reel combination. (See instructions included with the tank.)
8 Turn the Rotation Speed Dial to 'P.'
9 Couple the tank to the magnet coupling (see illustration below).
Notes:
A Practice with an empty tank 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. Mount the tank on the drive magnet when the drive magnet is changing direction of rotation.
C Observe the drive magnet. As it reaches the end of a rotation cycle, move the base of the tank up to the drive magnet. Move it with the tank in a horizontal position. You will feel the magnet try to 'grab' the tank. Let go of the tank, and it will attach to the drive magnet and begin to rotate.
D To uncouple, grasp the tank body and lift the free end straight up, at a right angle to the processor. This motion will break the magnetic bond, and the tank can be removed from processor.
10 Refer to instructions for the specific process you are using. They will cover pre-rinse or pre-warm time, as well as times for each processing step, rinses, etc. Be sure the water level is high enough in the upper trough to bathe the tank with water (1/8" to 1/4", or 3 mm to 6 mm, above the bottom of the tank). Do not go too high. The lid end of the tank will float.
Note:
A When using a pre-warm, allow the tank to rotate in the upper trough (the loaded tank is dry inside, with no water or chemicals in it) for the specified warm-up time.
B When using a pre-rinse, allow the loaded tank to rotate in the upper trough with the appropriate amount of rinse water (see Section 3 for specified pre-rinse times).
C At the end of the pre-warm or pre-rinse step, remove the tank from the processor. Remove the red cap. Pour out the pre-rinse water (if a pre-rinse was used). Pour in enough of the chemical for the tank and film you are using. Replace the red cap. Start timing the step.
Caution: Many photographic solutions can produce gasses that cause a pressure buildup inside the tank. The red 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 tank.
D When processing film (without the JOBO Lift attached), manually invert the tank two or three times. This action ensures that the solution has covered all the films' surface quickly. Strike the bottom of the tank against the heel of your hand, or against the counter top to dislodge any 'air bells' (bubbles) on the film. Couple the tank to the processor.
E About ten seconds before the end of the time for the chemical step, remove the tank from the processor. Remove the red cap. Pour out the used solution.
F Pour in the next chemical (or rinse, if specified). Replace the red cap. Start timing, and couple the tank to the processor.
G Continue this sequence of emptying and filling until the process is complete.
H For the pre-rinse step only, use one filling of water for the tank. Do not change the rinse water for the duration of this step. Other rinse steps are done in the tank, 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.) The final rinse step may also be done this way. The tank may be removed from the processor, and a running water rinse with the JOBO Film Washer #3350 may be used. (See table below for recommended rinse water quantities.) Either procedure will provide a thorough final rinse.
Be sure the water level is adjusted high enough in the upper trough (see illustration below) to bathe the tank with water (1/8" to 1/4" or 3 to 6 mm, above the bottom of the tank.) Do not go too high. The lid end of the tank will float, causing uneven development
11 Rinse Water: Rinsing (washing) of photographic material is a very important part of the process. Insufficient rinsing can produce inferior processing results which are likely to fade or deteriorate much sooner than would happen with sufficient rinsing.
Three factors affect rinsing: the water quantity used, 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.
The number of water changes (cycles) is more important than the timing of the cycle in rinse steps. If you have difficulty in cycling the rinse water every thirty seconds, take whatever time for the cycle you need, but, be sure to have at least as many cycles as recommended. (Divide the rinse time in minutes by two, to determine the number of rinse cycles.) 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.
Rinse water volumes:
If the chemical Then the minimum rinse
volume is between: water volume is:40 ml - 260 ml 260 ml
300 ml - 470 ml 500 ml
540 ml - 600 ml 600 ml
600 ml - 1000 ml 1000 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
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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