Anyone familiar with ATL-1000

oliver2311

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I've been using jobo atl-1000 for the b&w processing. One day I found b&w program doesn't check if the dev temp reaches at 24c.
I'm using cold tap water(16c theses days) for inlet. It is supposed to heat it up to 24c and start processing. I have checked the other program(C-41,E6), it works fine.
Only for b&w program, the process starts immediately with pre-rinse even though the temp is around 16c.
Anyone who can give me any advice, please help
 

Kino

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The processor only heats the chemicals up to the required temperature, not in the inlet water:

From the manual mschem pointed you to above ^

Instructions for the
AutoLab ATL-1000 #4210
and the
AutoLab ATL 1500 #4228

4.2 Adjusting the water temperature
The water for the ATL-1500 is supplied by the tempered water inlet connected to the rear of the machine. The temperature of this
incoming water must be adjusted with an external mixing valve. Water Mixing Panel II #4190 was made specifically for the ATL-1500.
The incoming water must be within ± 0.5ºC (0.9ºF) of the process temperature.
 
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oliver2311

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Of course... atl-1000 is supposed to heat up chemicals which don't for now only for b&w process.
 

Kino

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Your heating element might have built-up resistance or corrosion on the connecting terminals to the point that it no longer can produce heat at the lower voltage needed for B&W processing.
 

Sergey Ko

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ATL-1500 check the temperature in the 1st bottle (usually developer). Then heat if it is lower, but not wait for lower temperature if it was higher than 24C.
Thats why I have temp control for water connected to machine, & I start when the rinsing water & all solution are about 23,5C for B\W & 37,5C for C-41
 
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oliver2311

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Yes, exactly. but the problem
is mine doesn't check the temp even if the dev solution is 16c it starts processing. No heat procedure for b&w.
 
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oliver2311

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Kino said:
Your heating element might have built-up resistance or corrosion on the connecting terminals to the point that it no longer can produce heat at the lower voltage needed for B&W processing.
Click to expand...

How can I fix it then?
 

Kino

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That was just a guess on my part. Please contact Jobo directly to see if they have a suggestion to fix your machine.

You can find their information on: https://www.jobo.com/
 

koraks

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Kino said:
That was just a guess on my part.
Click to expand...

And frankly not a very plausible one. Heating elements are not commonly driven at lower voltages if the target temperature is lower. They're virtually always bang-bang control at full voltage, or PWM in more modern systems (which is the same, just modulated faster). If the machine still heats up the developer fine for other programs, then this proves the heating element is working just fine.
 
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