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I replaced what I thought was a defective temperature probe today with a new PT1000. In ice water bath, the temperature reading goes up to 131deg F. Putting the Sensor probe into the Aquarium, the reading is 84deg F.
UPDATE: the reading in the Aquarium goes up when the temperature actually is dropping.
Anyone experience this where the sensor is reversing the reading
How do I troubleshoot this with my Profilux 3?
Attachment 10332
Hello
If you have entered the correct ADC 1+2 values, or if you have none.
Then you can try the following.
On the Profilux itself, select sensor settings_extension, and have the Profilux "readjust" the sensor.
regards Pit
Thank you for the view and reply Pit.
The ADC 1+2 settings are factory settings. I recorded them prior to firmware update as one Forum chat had recommended.
I have not tried "Calibrate" as I do not know how to correctly set ADC 1+2. If you think there are instructions on GHL, I will look for them.
I have tried adjusting the temperature, using "Adjust Temperature", but that doesn't stay correct for long. Also adjusting the temperature doesn't explain or correct the ice water problem, wherein the temperature sensor goes up to 131deg F instead of down to ~32deg F.
I also have tried the "Fix dig. temp. -sensor issue. But it does not resolve both the incorrect temperature reading or the ice water test.
Thank you again.
Would someone from GHL, engineering or quality, help me out with some failure modes related to temperature functionality and schematic? My company is in the high tech field and make products using caps and resisters, ICs, eprom, on 8 layer PCBA. I'm almost confident if someone for GHL could help me with some FMEA, I can dive deeper and root cause this issue with my engineering and rework team.
Are the probe cables running alongside other electronic equipment power cables?
Perhaps these cables are releasing noise which is interfering with the probe readings.
Thank you for the response. I will check that too and respond back with a picture.
Tonight I'm going to take the PL3 offline and open the device up to check the internal soldering and components. I'm hoping a loose or cracked solder on the PS2 port block is the root of the problems or something else internal
the ADC values are wrong, they show the values after clicking the "fix dig .." button, which is only for digital sensors, as the name says
the standard values for analog sensors (PT1000) are: 677 and 319
-> please recover these values
danke schön Matthias! That worked. So simple. This is my first controller, Profilux 3. The previous owner had many good things to say about the quality of GHL. I'm sure he also meant the support too.
You guys are the best. I'm all set for now.
you are welcome!