Jobo TBE 2 Tempering Bath

I need the instructions for one of these units. If anyone has a copy they would be willing to part with or provide a copy of I would be grateful.

Bill

I do not get your point. Is its use not straightforward?

I mean, fill with water, plug in the mains cable, switch it on (left switch), set the temperature (right switch), put in the bottles, when the red light goes on the temperature of the bath either is reached and the heater has went off, or the heater has just went on (easy to distinguish by watching the process). Best to control the temperature with a thermometer inside the bottles. After use take out the bottles, switch off, pull the mains plug, pour out the water.

Could there be anything more in such manual? The Jobo manuals were very basic anyway.

AgX said:

I do not get your point. Is its use not straightforward?

I mean, fill with water, plug in the mains cable, switch it on (left switch), set the temperature (right switch), put in the bottles, when the red light goes on the temperature of the bath either is reached and the heater has went off, or the heater has just went on (easy to distinguish by watching the process). Best to control the temperature with a thermometer inside the bottles. After use take out the bottles, switch off, pull the mains plug, pour out the water.

Could there be anything more in such manual? The Jobo manuals were very basic anyway.

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Thank you for your constructive comment. I want the manual for any detail that may not be obvious.

The only pdf manual I have is for the older TBE (not TBE-2) shown here. The actual TBE-2 manual (seen in the e-bay screen shot) may not exist in pdf form. Somewhere in a Jobo document I read to only fill it half way and if it won't heat, check the thermal cutout switch.

These are not water heaters. You want to begin by filling them with water reasonably close to the standardized temperature you want (your setting), slightly lower temp; within five degrees is fine. The job of the tempering box is to keep it close to that temp. Never turn it on if it's dry or has cold water in it. Be religious about deliberately turning it off with the red on/off switch when not in use. Fortunately, if you do screw up or get absent-minded like me, and fail to notice the power is on when it shouldn't be, and the unit overheats, there's an automatic shutoff switch in the system. Then you push the little reset button on the side of the controller. Likewise, whenever possible, do not start with cold solutions, but have them within reasonable temp range of the intended water bath temp itself. If that's not possible, set the unit just a few degrees higher than your solutions, wait for the water bath reach equilibrium, adjust it a bit higher again, and so forth, until you're on target. Expecting it to take a quantum leap and raise the whole nine yards twenty degrees, for example, all at once, is a good way to burn out your heater element prematurely.

DREW WILEY said:

Never turn it on if it's dry or has cold water in it.

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One cannot do harm to such device by filling it with cold water.

It just takes longer to reach temperature...

Heating elements basically do not wear out running in water. Running in air might do them overheat (though there are elements designed to red-glow), but the way at least some Jobo heating systems were designed, the tank will even melt before that.

The issue with heating elements with metal cover is just this cover. If there is scale build-up, repeated chemical cleaning may lead to pitting corrosion of their galvanized copper covers. However with the Jobo device in question the heating element seems to have a corrosion-proof coating.
But there is a point in avoiding scaling.

Mine is 300W, so it is calculated to take 11 minutes to heat water of 20C (room temp) to 24C (process temp). In real situation about 15 min.

ic-racer said:

The only pdf manual I have is for the older TBE (not TBE-2) shown here. The actual TBE-2 manual (seen in the e-bay screen shot) may not exist in pdf form. Somewhere in a Jobo document I read to only fill it half way and if it won't heat, check the thermal cutout switch.
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Many thanks the information is helpful

Go ahead, gamble, Agx - Maybe you can afford to periodically replace them. But they AREN'T industrial devices. They're intended for a simple job and shouldn't be forced to work too hard.

Then please explain how a heating element will be destroyed by heating up cold water, but not by heating up warm water.

Been there, done that. Learned the hard way myself. Many of these traditional heating elements on devices like these were accompanied with instructions not to use it as a "water heater", to significantly heat up cold water. These are tempering boxes meant to keep the water at a constant temperature. You're prolonging the useful life of the device by using the heating element conservatively, not drastically.

What happened to your elements? As indicated I only see the scaling as issue. Been there, done that too. But am open to learn of other causes.
Also there are similar heating elements even used nonstop for far baking, grilling. And then all those soldering irons.

The TBE 2 manual is available in the files section of the Jobo Film developing group on Facebook. It's the same one that's circled in the picture in post #4.

nbagno said:

The TBE 2 manual is available in the files section of the Jobo Film developing group on Facebook. It's the same one that's circled in the picture in post #4.

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I don't see any links to files.

ic-racer said:

I don't see any links to files.
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No, you can't see it from there.