Ik have four probes on my HM4.1, two Maverick ET-72 6" high resistance hybrid probes, a ET-72 standard food probe and a ET-72 pit probe. Compared to my Maverick ET-733 (which I believe is accurate) there are differences, sometimes more then 5 degrees Celcius, between them.
A quick test shows the following results:
For higher temperatures, the differences can be greater, but I haven't tested this yesterday. I only went up to 100 degrees C (boiling water)
So I went on finding the resistance of the ET-72 probes using the 'R'-setting in HM. For one of the probes the following results:
Temp C Resistance
Low 4 543445
Mid 24 215647
High 99 18700
This leads to the following Steinhart-Hart values:
a= -0,000369703
b= 0,000322661
c= -0,000000123
When I enter these values in HM, and click save&apply, the entire probe is disabled. So it seems that the values are not accepted? What am I doing wrong?
A quick test shows the following results:
Temp1 | Temp2 | Temp3 | Temp4 | Temp5 | |
ET-733 | 13 | 29 | 53 | 80 | 100 |
Probe 0 | 12,7 | 28,4 | 53 | 81 | 100,4 |
Probe 1 | 11,1 | 27,7 | 51,2 | 78,9 | 98,4 |
Probe 2 | 11,1 | 27,9 | 52,2 | 77,8 | 98,3 |
Probe 3 | 11,2 | 27,9 | 53 | 78,3 | 98,3 |
For higher temperatures, the differences can be greater, but I haven't tested this yesterday. I only went up to 100 degrees C (boiling water)
So I went on finding the resistance of the ET-72 probes using the 'R'-setting in HM. For one of the probes the following results:
Temp C Resistance
Low 4 543445
Mid 24 215647
High 99 18700
This leads to the following Steinhart-Hart values:
a= -0,000369703
b= 0,000322661
c= -0,000000123
When I enter these values in HM, and click save&apply, the entire probe is disabled. So it seems that the values are not accepted? What am I doing wrong?
Last edited: