Maverick ET-733 probes on HM 4.1


 
E

EdwinH

New member
I thought I could use the Maverick ET-733 probes on the HM 4.1, als the ET-732 seem to work. But I don't get a reading at all when attaching these probes to my HM 4.1.

I tried inserting them millimeter by millimeter because the pins are a bit longer then the ET-72 ones, but nothing happens.

Can someone confirm that the ET-733 probes don't work (yet)? I have ordered ET-72 probes, but that will take a few weeks.

I don't have other probes to test, and I'd like to rule out any faults with my HM hardware.
 
My experience with HM4.0:
At room temp, the 732 probes are right on the edge of the ADC range. Try warming them up to ~90* (Hot water) & see if they start working. If so, you can change the resistors from 10k to 22k. I still have the 10k on my 4.0, I don't need temp readings below 100* bad enough to change the resistors.
 
Thanks, I'll try that tonight. I hope you mean degrees Fahrenheit, because temperatures below 90 Celcius (194F) are relevant of course

Edit: no, puttings the probe in hot water does not change a thing, HM still says 'no probe'.
 
Last edited:
Hmm, doesn't look like the circuit has changed for 4.1. Did you change the preset coeffecients in the config webpage? if you have them set to ET72/73 (default) you'll never get a reading. Do you have a thermistor for ambient? Does it work.
You could try to change the resistors to 22k, but I think I'd keep testing. Did you try boiling water? You should do that to make sure the probes are reading correctly anyway.
Yes, 90*F is where my 732 probes start to work. The 72/73 probes work down to room temperature & below (read down into the 40's).
 
I've never tried ET-733 myself, but given that they sell ET-733 probes separately (not as ET-732/733 or ET-72/73/733) indicates they are different than the other models. You could try emailing Maverick and asking them if they have a datasheet for the probes which would have the relevant information we'd need to calculate the coefficients.

You can also set the setpoint (from the Configuration page) to 0R and HeaterMeter will display the resistance of the probes (Food1, Food2, or Food3 only) so you can at least see if it is getting a good connection.
 
Thanks, I'll try that. It seems that the 733 probes are actually different then the probes used before. So I already ordered a pack of ET72-probes from Maverick, they will work for sure.

I'll try your setpoint options tonight, and I'll mail Maverick!

Edit: the probes are not recognised at all, I'm afraid these will not work. Maybe Maverick will answer my question...
 
Last edited:
You must log in or register to reply here.

 

Back
Top