is the top of your heater yellow and blue or blue and grey?
I believe the calibration method is only applicable to the newer blue and grey ones. the older models did not have this feature.
having said that, it really shouldn't be necessary to have to calibrate it in this way.
what I do is this:
using an accurate thermometer, measure the tank temperature.
if you need it higher, turn the heater dial just until the light comes on. leave for several hours. check again.
repeat. the same process can be used to go down in temperature, just turn your heater dial the other way.
most heaters on the market are not calibrated such that the dial setting will read exactly what a thermometer will read, I have yet to encounter one that does right out of the box.
having said, that, it doesn't really matter if the dial setting matches the tank temperature.
as long as the tank temperature is being kept stable by the heater, it really doesn't matter what the dial is set for.
keep in mind that once your heater is set properly and the tank temperature is stable, you really never have to touch it again.
ever.
unless you want to raise the temperature to deal with a bout of ich. thats about the only reason you need to play with the tank temperature.
the rest of the time, its pretty much "set it and forget it"
I haven't touched the 200w Ebo on my 65g in about 5 years. and the tank is always a stable 80.
once you get things set properly, it should be the same for you.
hope this helps.
