HM 4.1, resistors R5, R16, R17, R18

B

Brent Cooley

TVWBB Member

• Feb 5, 2014

• #1

Are the resistors inside the red square the R5, R16, R17, R18 resistors that are connected to the probe jacks that can be swapped out with different resistors based on the type of probe?

 

Bryan Mayland

TVWBB Hall of Fame

• Feb 5, 2014

• #2

Yes, they're the 4 in the middle with the silkscreen "10k 1%" on them.

 

C

Chris_B

New member

• Mar 21, 2014

• #3

If you swap these resistors out for the 22k resistors how low will the temp read with the newer maverick probes?

 

D

D Peart

TVWBB Pro

• Mar 21, 2014

• #4

You should be able to get an additional 10-15F on the lower end.

dave

Chris_B said:

If you swap these resistors out for the 22k resistors how low will the temp read with the newer maverick probes?

Click to expand...

 

Bryan Mayland

TVWBB Hall of Fame

• Mar 21, 2014

• #5

It should actually read at room temperature even with the 10k resistors so it is hard to say. You can compare the curves using this tool (set it to ET-732 for both)
http://capnbry.net/linkmeter/adctherm/

 

B

Brent Cooley

TVWBB Member

• Mar 21, 2014

• #6

My HM uses ET-732 probes and 22k resistors.

I just stuck my probe into the fridge then the freezer and it started to act strange right at 9 degrees F, where it started jumping between 9/0/9/0. Then it stayed at 0.

So I'd say 9 degrees F is about the low point, either for the probe itself or the HM ADC with the 22k resistor.

 

C

Chris_B

New member

• Mar 21, 2014

• #7

Thanks for the info! I will order the newer maverick probes and replace the resistors if needed.

Any preference between the thermo and maverick probes?