Tronic 100W heater no longer accurate

[Computer Prog]

I have been using a Tronic 100W heater for a few years now and I've
noticed that the scale on the temperature set dial is no longer
accurate. It used to maintain the temp indicated on the dial, now it
is about 5 degrees too low. I set it at 80 and I get 75, I set it at
77 and I get 72, etc.. The temp in the tank does stay stable.

I‘ve replaced my tank thermometer twice in the past month just to make
sure the thermometer is accurate. Has anyone else experienced this?

[RedForeman ©®]

> I have been using a Tronic 100W heater for a few years now and I've
> noticed that the scale on the temperature set dial is no longer
> accurate. It used to maintain the temp indicated on the dial, now it
> is about 5 degrees too low. I set it at 80 and I get 75, I set it at
> 77 and I get 72, etc.. The temp in the tank does stay stable.
>
> I've replaced my tank thermometer twice in the past month just to make
> sure the thermometer is accurate. Has anyone else experienced this?

Have you moved the current around any? Like moving the filter or powerhead?
Sometimes that will make your temp fluctuate a bit... I keep my heater near
the intake or output of the HOT filter or powerhead to keep some movement
around the heater, keeps it in check so to speak...

--
RedForeman ©® future fabricator and creator of a ratbike
streetfighter!!!

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[NetMax]

"Computer Prog" > wrote in message
om...
> I have been using a Tronic 100W heater for a few years now and I've
> noticed that the scale on the temperature set dial is no longer
> accurate. It used to maintain the temp indicated on the dial, now it
> is about 5 degrees too low. I set it at 80 and I get 75, I set it at
> 77 and I get 72, etc.. The temp in the tank does stay stable.
>
> I've replaced my tank thermometer twice in the past month just to make
> sure the thermometer is accurate. Has anyone else experienced this?

The tank's stability is the parameter of interest, so the number on the
dial is secondary. However the Tronics dial only goes so far (91 or
94F?), so if you need to keep increasing it, you will run out of room
eventually ;~) I have over 100 Tronics in a fish room, and generally
find their accuracy to the dial to be pretty good. The odd one is
several degrees off, but I haven't noticed any drifting. I'll watch for
this. The thermostat is digital, so while a temperature drift is not
impossible, the individual components would probably not be the cause,
but rather their interconnections, so I'm not sure about the probability.
I would look at the heater's position in the water flow, and check for
internal condensation. Any water ingress would/could degrade circuit
interconnections between the device monitoring the temperature
(thermistor?) and its amplifier. It's age might be another factor.
While they should outlast any conventional heater, a few years ago would
have been much deeper into their earlier prototypes. I was
disassembling/reassembling a bunch of Rena heaters recently (also a
nicely constructed heater) and I was struck by the amount of model
revisions which had occurred in such a short period of time.

NetMax

[MartinOsirus]

>Subject: Re: Tronic 100W heater no longer accurate

If you want a good heater - get an ebo-jager

[NetMax]

"MartinOsirus" > wrote in message
...
> >Subject: Re: Tronic 100W heater no longer accurate
>
> If you want a good heater - get an ebo-jager

LOL, even though the Ebos use the same digital thermostats as everyone
else, or do you know something we don't?

NetMax

[Harry Muscle]

"NetMax" > wrote in message
. ..
>
> "MartinOsirus" > wrote in message
> ...
> > >Subject: Re: Tronic 100W heater no longer accurate
> >
> > If you want a good heater - get an ebo-jager
>
> LOL, even though the Ebos use the same digital thermostats as everyone
> else, or do you know something we don't?
>
> NetMax
>
>

I thought Ebos still use the old bimetal thermostats. It's just that most
people like them so much, they assumed they have to use something better,
hence they think it's digital. At least that's what I've read on google
from previous posts.

Harry




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[Computer Prog]

As I said in my initial post my temp does stay stable throughout the
day. I took a look last night and the dial on the Tronic is pointing
right at 81 and the water temp indicated on my in-tank thermometer was
75 degrees. I double-checked the temp with a high quality stem
thermometer I use for photographic developing (I washed it first J)
and I got about 74 degrees. I measured at various points in the tank
and the temp is consistent in all parts. I have an AC150 in a
10-gallon tank so I have plenty of circulation.

The think my Tronic is about 4 years old and I do not leave it
completely submerged. It is mounted vertically so I can get to the
adjustment dial from the top of the tank. My water level in the tank
is well above the water level indicator on the heater.