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calibrating new temp probe on PIII
I just getting my new GHL online after having it repaired and upgraded to a PIII.
My temp sensor has been sitting in a glass of tank water for almost six months and when i connected it it measured 37 deg.
I thought it might be damaged so i brought a new one yesterday and again it seems out, after a quick google and reading a couple of posts i found it seems that it may need calibrating or using the figures from when it was a PII which i dont have.
I have changed the adc 1 and adc 2 and now they are adc1=677 and adc2=319 ( i found these figures on here somewhere) it now reads a couple of degrees over but its better.
How exactly do i calibrate these correctly.
Thanks Adam
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Hi Adam,
where was the Upgrade to PL3 done? The upgrade procedure includes to save or write down the ADC1 and ADC2 values for the temperature.
A calibration by the user isn't possible for the temperature.
Solutions:
- you've got a paper with the values, simply write the ADC1/ADC2 values to the corresponding fields
- send the ProfiLux to GHL for recalibrate
- Downgrade PL3 to the original PL2, note the ADC1/ADC2 values for temperature, Upgrade to PL3 and write the ADC1/ADC2 values to the corresponding fields
- change the ADC1/ADC2 values empirical until your temperature is exact enough for your needs (needs lot of time)
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