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Extreme data logging


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4 replies to this topic

#1 DurhamAppliance

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Posted 09 November 2014 - 11:05 PM

The usefulness of temperature data logging a hard-to-diagnose fridge is unquestionable and has been discussed in numerous threads. However, wouldn't it be cool to also determine when and if the compressor or defrost heater is running or when an evap fan turns off or when the doors are open for an extended period?

This could be done by comparing and analyzing temp info and line current info together.

Using a current /voltage logger along with a data logger may allow this. Supco makes a reasonbly priced current/voltage logger. It's ac only which would reduce some of its usefulness but it still would make a great Christmas gift for the tech who has everything :

http://www.amazon.co...cription-iframe $165

If I can convince my wife to buy one along with all the other toys I want for Christmas, look forward to a Durham's Extreme Data Logging video... but I'm gonna need all of you to help me decipher the data!

Edited by DurhamAppliance, 09 November 2014 - 11:24 PM.

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#2 applianceman97

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Posted 10 November 2014 - 11:31 PM

Now that's nifty!

Kicks major Samsung booty first, asks diagnostic questions later.

http://www.justintimeappliance.com
 


#3 olyteddy

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Posted 10 November 2014 - 11:54 PM

I had this Lascar Temperature Logger: http://www.amazon.co...1?ie=UTF8&psc=1but our HVAC guy uses it a lot too so I got this Extech: http://www.amazon.com/Extech-Temperature-Humidity-logger-RHT10/dp/B00NG258PQ/ref=sr_1_8?s=industrial&ie=UTF8&qid=1415681455&sr=1-8&keywords=humidity+logger. The Extech measures humidity too so any time the door is open the humidity spikes. 



#4 DurhamAppliance

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Posted 11 November 2014 - 05:22 AM

that's a good point OT. I have two Supcos and one has temp and humidity but I usually turn off the humidity setting since I didn't see the purpose but your idea makes sense.

So then I will data log both fridge and freezer with humidity logging in freezer and also use the current/voltage logger for compressor/fan/heater activity. I would imagine the amp logger would need to be set to record every minute or even every 30 seconds to catch door openings. If this can be done using humidity then the current/voltage logger can then be set to every 2 to 5 minutes.

Just found a very interesting thread from 2012. In it, someone asked about monitoring amps and brother mentioned to the the amp logger I linked....http://appliantology...ature-problems/

That's what I love about this site for if you look hard enough, you'll probably find someone has already discussed your problem. Funny thing is I participated in that thread but did not understand the value of amp monitoring at the time.

Also in that thread, I asked about the purpose of humidity monitoring but no one responded..... it's been a long time between question and answer but thanks Brother OT!

Edited by DurhamAppliance, 11 November 2014 - 05:42 AM.

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#5 olyteddy

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Posted 11 November 2014 - 01:18 PM

BTW the reason I got the Lascar was because it cost less on Amazon. ($50 -vs- $75) BUT I bought the second one (the Extech) through Grainger because the prices were reversed...






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