Temperature Calibration/Adjustment
- Thread starter AgentSPS
- Start date
No there is no calibration for it, as there is no need, apparently pre calibrated there a re a few post about this. Cant find the exact one I am looking for but here is one of them anyway... http://reefcentral.com/forums/showthread.php?s=&threadid=1270241&highlight=temperature+calibration
AgentSPS
New member
Nonsense....I spent 3 years in the calibration business and digital temperature devices and standards do not stay calibrated permanently. I would also like to see the calibration procedure and NIST traceability of the standards used to calibrate the temperature component and probes during the manufacturing process. IMHO they don't exist with this brand nor most others in the hobby. I have a lab grade analog thermometer which has a lower tolerance than the Profilux and I am trusting that. Its telling me the Profilux is off by about 2 degrees. Without any way of adjusting my profilix temp, I might as well rely on my chiller for the temp...at least it allows me to calibrate.
GHL team, please take serious consideration of building in temperature adjustment capability into the next firmware update regardless of how confident you are in the factory 'calibration'.
GHL team, please take serious consideration of building in temperature adjustment capability into the next firmware update regardless of how confident you are in the factory 'calibration'.
AQD_ottawa
New member
In the software in the temp setting you can adjust the calibration to suit!
We to date after 7 years of production have not had the need for any client to touch this, but its there if you so choose.
When was your lab grade calibrated and by what method? As you come from the industry you will also be aware of the 1 degree +/- tolerence rule so i am assuming you are employing this in your calculations also.
Hope that helps
We to date after 7 years of production have not had the need for any client to touch this, but its there if you so choose.
When was your lab grade calibrated and by what method? As you come from the industry you will also be aware of the 1 degree +/- tolerence rule so i am assuming you are employing this in your calculations also.
Hope that helps
AgentSPS
New member
This does help and I am relieved to hear there is a way to adjust so thank you.
Yes tolerance is +/- 1 degree, as are all analog (liquid) thermometers. Calibrated Sept 07 using Isotech standards traceable to NIST. If I can, I might try borrowing a more sensitive thermocouple from the lab to calibrate profilux.
Thanks
jamesdawson
New member
Don't forget, 1 degree celsius equals 1.8 degrees fahrenheit.
If the probes were factory calibrated at the celsius standard and they can be +/- 1 degree celsius then that means a probe at the maximum 1 degree celsius variation is going to be off 1.8 degrees fahrenheit (damn close to 2 degrees F) and still be within standard!
James
If the probes were factory calibrated at the celsius standard and they can be +/- 1 degree celsius then that means a probe at the maximum 1 degree celsius variation is going to be off 1.8 degrees fahrenheit (damn close to 2 degrees F) and still be within standard!
James
AgentSPS
New member
Im not a metrologist and do not have calibration procedure or standards spec in front of me but I believe tolerance is in degrees F. Either way it should not be hard to get a hold of a thermocouple with tolerance much better than 1 degree F. Can use this to tune the Profilix. Either way I am happy to find out that ability to adjust temp is present on the Profilux. For me, my tank always tends to run on the upper edge of acceptable temp. Temperature differential between 80-82 is, in my experience, more potentially dangerous than say 76-78.
AQD_ottawa
New member
+/- 1 degree is in celcius industry worldwide standard set by CE and UL
AQD_ottawa
New member
Correction to above statement.
In the software you can NOT change the value due to the fact it is not required. This from what I remember was covered by GHL in a thread a while back and I believe it was suggested that these figures could be adjusted in later software versions, hense my confusion.
But as you are within industry standard our personal advise is there is no specific reason to change these values. No matter what thermometer you employ whether lab grade or bargain bucket Chinese import, put them together and you will always see a fine tolerance of below 2 degrees F or 1 degree C it is the common nature of thermometers and the reason for the industry approved tolerance.
I will however check the facts fully with GHL tomorrow for you to see if they are looking at implementing self adjustments.
In regards to dangers to a tank, after two personal visits to the maldives I did many checks on water paremeters as an interested hobbyist and one thing is very common and that is temperature fluctuations of anythign up to 4 degrees in one day +/- with an average temperature of 79F so having a 2 degree swing in my personal experience both in the wild and in my own system is of little concern
In the software you can NOT change the value due to the fact it is not required. This from what I remember was covered by GHL in a thread a while back and I believe it was suggested that these figures could be adjusted in later software versions, hense my confusion.
But as you are within industry standard our personal advise is there is no specific reason to change these values. No matter what thermometer you employ whether lab grade or bargain bucket Chinese import, put them together and you will always see a fine tolerance of below 2 degrees F or 1 degree C it is the common nature of thermometers and the reason for the industry approved tolerance.
I will however check the facts fully with GHL tomorrow for you to see if they are looking at implementing self adjustments.
In regards to dangers to a tank, after two personal visits to the maldives I did many checks on water paremeters as an interested hobbyist and one thing is very common and that is temperature fluctuations of anythign up to 4 degrees in one day +/- with an average temperature of 79F so having a 2 degree swing in my personal experience both in the wild and in my own system is of little concern
AgentSPS
New member
Thank you for checking and please encourage them to take a serious look at allowing users to adjust regardless of tolerance and any optimization done at the factory.
Overall the Profilux is such a great product with so much flexibility. I would hate to have something as relatively small as this become a drawback.
Overall the Profilux is such a great product with so much flexibility. I would hate to have something as relatively small as this become a drawback.
AQD_ottawa
New member
No problem i will ask for you, but i do not see how this would be a draw back to a fully functioning certified devise, but I am happy to enquire for you no problem, which i hope will reasure you.
Best wishes
Michael
Best wishes
Michael
Matthias Gross
.Registered Member
Hi
there is a trick to manipulate the temp-calibration:
- save your sensor settings
- open this file with notepad
- manipulate the calibration values - you will find them easily
- load the sensor settings back
More regarding this topic can be read in other threads here, I don't want to repeat my statements again.
there is a trick to manipulate the temp-calibration:
- save your sensor settings
- open this file with notepad
- manipulate the calibration values - you will find them easily
- load the sensor settings back
More regarding this topic can be read in other threads here, I don't want to repeat my statements again.
Matthias Gross
.Registered Member
you will find 4 numbers in this file:
the ADC1 and ADC2 (compare to your values which are displayed in ProfiLuxControl under Calibration Data), also 200 and 300 (20°C and 30°C)
the ADC1 and ADC2 (compare to your values which are displayed in ProfiLuxControl under Calibration Data), also 200 and 300 (20°C and 30°C)
Matthias Gross
.Registered Member
no, it looks like this
30, "CODE_SENSORPARA1ITEM0", 200
31, "CODE_SENSORPARA1ITEM1", 300
32, "CODE_SENSORPARA1ITEM2", 677
33, "CODE_SENSORPARA1ITEM3", 319
in Sensordata.par
677 and 319 are my calibration values, 200 and 300 is the temp.
30, "CODE_SENSORPARA1ITEM0", 200
31, "CODE_SENSORPARA1ITEM1", 300
32, "CODE_SENSORPARA1ITEM2", 677
33, "CODE_SENSORPARA1ITEM3", 319
in Sensordata.par
677 and 319 are my calibration values, 200 and 300 is the temp.
badazztealcobra
New member
Anyone else checked theirs by any chance ???
I just checked mine....
Fluke IR thermometer - 78.3
Fluke handheld - 78.6
Profilux temp sensor - 78.5
I dont think it can get any closer than that.
I just checked mine....
Fluke IR thermometer - 78.3
Fluke handheld - 78.6
Profilux temp sensor - 78.5
I dont think it can get any closer than that.
Last edited:
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