henward Posted July 27, 2011 Report Share Posted July 27, 2011 ok, in case the subject doesn't make sense. when you buy them new, they are pre calibrated, then when you eventually use them, in time i find that you gotta move the dial higher and higher to compensate? who experiences this? Quote Link to comment Share on other sites More sharing options...
waterlogged Posted July 27, 2011 Report Share Posted July 27, 2011 I have, I think may be the opposite though. I usually just have to play it by the thermometer and see how it goes. My 300W that is in my 445L is on 60% of the time and is set at 24C when the tank reads around 26-27C. I also have a 300Wblue planet which is on less Though in saying that both my Jager heaters (other a 150W) are about 5-6 years old Quote Link to comment Share on other sites More sharing options...
Sophia Posted July 28, 2011 Report Share Posted July 28, 2011 They aren't properly calibrated, the instructions say you have to do it yourself once it's in the tank. I think mine is set a couple of degrees higher than the thermometer reads usually. Quote Link to comment Share on other sites More sharing options...
Ira Posted July 28, 2011 Report Share Posted July 28, 2011 They aren't properly calibrated, the instructions say you have to do it yourself once it's in the tank. I think mine is set a couple of degrees higher than the thermometer reads usually. It's not a lack of having calibrated it. It's the setting drifting over time. Sure you can recalibrate it occasionally, but that's still adjusting it. I've found mine seem to stay roughly the same until right towards the end when they die. Not really surprising, you get little fatigue fractures in the bimetallic strip, maybe corrosion etc throwing it off a little over time. Quote Link to comment Share on other sites More sharing options...
Sophia Posted July 28, 2011 Report Share Posted July 28, 2011 Sorry, that was an unelaborated answer I made while quickly snooping on the board at work :roll: You're right anyway but the instructions I've got do say to 'calibrate it' when you first use it by letting it settle in the tank with power off for an hour or something, then set it to where you want it using the red arrow, then check later and see if the thermometer matches, and if not then move the top dial around. Quote Link to comment Share on other sites More sharing options...
henward Posted July 28, 2011 Author Report Share Posted July 28, 2011 just recalibrated funny the new models, all you do is turn off the heater from the socket. turnthe dial to the temp that the tthermometer indicates, and plug in, thats recalibrated the older one has the tab you pull up and push down. none the less, i have done it:D works now:D Quote Link to comment Share on other sites More sharing options...
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