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Instruction Manual for the ATL's: 2200, 2300, 2400 and 2500
8. Special Functions
8.1 Reading the actual temperatures
When in RUN mode you can press the F1 key to display the current water bath and chemical temperatures. The chemical temperature displayed always reflects the sensor in use for the currently selected program.
8.2 Overriding the temperature setting
If you decide to run a process without the water and/or chemical temperatures being correct, you can override the sensors. Pressing START while the processor is still heating will cause the following message to be displayed:
Process temperature
not yet reached:
Forced start:
Press STARTPressing START with this message displayed starts the process regardless of the actual temperatures.
Note: Running a photographic process out of the recommended process temperature can ruin paper or film.
8.3 Quick tempering
After the chemical bottles are refilled, the processor will not start a new process until the temperature of the chemistry is within ± 0.3°C of the process temperature. In order to speed the process of heating the chemistry you can cause the processor to heat the water bath beyond the process temperature temporarily. Enter main SET mode (sec. 6.1.1.) and choose option 6 (see sec. 6.2.6), press ENTER to turn Quick Tempering ON. When Quick Tempering is ON the tolerance for maintaining the process is lowered to ± 0.3°C (it's normally ± 0.1°C).
The Quick Tempering feature is only designed to speed the process of heating the photo chemistry. Disengage the feature before running any process.
8.4 Automatic chemical quantity use
For the 2500 series tank system, the AUTO chemical volumes are options for selecting the required filling quantity by using the tank number, and the length of the film loaded in the reels. For example: If the reels are loaded with one roll of 120 film on the outer spirals of the reel, they are loaded to "half". If there are two rolls of 120 film per reel they are loaded to "full." To access the AUTO selections, simply scroll through the "required chemical quantity" while in RUN mode (you'll have the option of ML selections or 2500 series tank selections).
Note: When you use an AUTO tank selection the rotation speed is automatically locked at 75 R.P.M.
Any film that loads past the red clip on a #2502 reel needs the "full" setting to provide adequate rinsing. All 2500 series tanks should be filled based on the AUTO tank selections. Due to the reel design, it is necessary to have a wash-water level much higher than the chemical level. Selecting AUTO uses the economical chemical volume for that particular tank but uses a much higher water level for thorough rinsing. Always use the FULL setting when processing 4x5" film on the #2509N Reel. (When processing film in the 1500 series tanks, always use the ML (non-AUTO) chemical volumes).
8.5 Automatic Temperature Compensation (ATC)
The ATC system allows you to run a B/W program at room temperature while tempering the remaining chemicals in the water bath to the Standby Temperature (see section 6.2.8). This allows you to run multiple color and B/W programs without waiting for the temperature of the water bath to adjust.
8.5.1 Mounting the B/W bottle rack
This option is not available with model ATL-2200.
Attach the included black bottle rack to the rear right of the processor (the bottle rack is illustrated in the Technical Information Section on page 6). Then, remove bottles 4, 5, and 6 from the rear set and place them in the bottle rack. Make sure the chemical and air lines are not kinked. When arranged correctly, the hoses will fit through the openings in the bottle cover.
8.5.2 Activating the ATC controls
First, turn the ATC switch on the front panel to "ATC-ON". This will divert the recirculating water bath from the upper processing trough to allow the material to be processed at room temperature.
Then, enter SET mode (as described in section 6.1.1), and select "Alter Process Data". Move down to change the process temperature (option #4). Change the process temperature to either ATC 20.0 or ATC 24.0 by pressing the down arrow until it cycles lower than 18.0ºC.
3. Bottle Batt: FR. 4. Pr. Temp. 38.0 C 5. Preheat 5:00 6. Pre-rinse 0:00 In determining whether to select ATC 20 or ATC 24, it's helpful to know how the processor works. In order to properly develop your B/W film, the processor needs to apply an algorithm to the process times. This algorithm varies depending on the starting temperature, and in order to ensure accuracy, it only works when the temperature is within ± 3.0ºC of the ATC temperature.
Range A Range B 17
18
19
20
21
22
23
24
25
26
2717
18
19
20
21
22
23
24
25
26
27
The table above is used to determine whether to use ATC 20 or ATC 24. The allowable temperature range is 17.0ºC - 27.0ºC (62.6-80.6ºF). If your room temperature is within Range A as indicated in the diagram, select ATC 20. If your room temperature is within Range B, select ATC 24.
Note: If room temperature is below 17.0ºC or above 27.0ºC the processor will not start (with the ATC option engaged). If the actual temperature of the developer is above or below ±3.0°C of the selected ATC temperature, but within the 17-27°C operational range the display will show the error "Process temp. 24-ATC (±3.0°C) not in the ATC-range". The AutoLab will only start if the START button is pressed again. The AutoLab will attempt to calculate the correct development time, but with a higher degree of inaccuracy.
Make sure the processor will continue to temper the chemicals remaining in the water bath correctly. The processor will temper these chemicals to the value set in Standby Temperature as described in section 6.2.8.
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
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- Sales: sales@jobo-usa.com
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This page last updated on 03/20/02