[Hai-users] Temp sensors accuracy again.

[Ken Schumm]

It makes me wonder if HAI calibrates the humidity sensors to an incorrect reference during manufacture.
  ----- Original Message ----- 
  From: Brad 
  To: 'Ken Schumm' 
  Cc: hai-users at tssi.com 
  Sent: Friday, January 13, 2006 5:45 PM
  Subject: RE: [Hai-users] Temp sensors accuracy again.


  Thanks for the replies Ken. Your explanation makes lots of sense. Hadn't thought of the wire length issue.

  I'm comparing the readings to a $300 Kestrel 4100 Pocket HVAC tool.
  Its temp specs are +/- 1.8 degrees.
  Humidity specs are +/-  3%

  I also have 3 of the Radio Shack gauges, and those and the Kestrel agrees with each other within a few tenths of each other on temp and Humidity.

   

   


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  From: hai-users-bounces at tssi.com [mailto:hai-users-bounces at tssi.com] On Behalf Of Ken Schumm
  Sent: Friday, January 13, 2006 4:59 PM
  To: Brad
  Cc: hai-users at tssi.com
  Subject: Re: [Hai-users] Temp sensors accuracy again.

   

  Just curious, if your humidity readings are off what are you comparing them to? I believe the Radio Shack humidity sensor is accurate to +/- 5 %. If the HAI is also +/- 5% the difference between the two could be 10% and they'd be within specs.

    ----- Original Message ----- 

    From: Brad 

    To: 'Wenzel, Guy' 

    Cc: hai-users at tssi.com 

    Sent: Friday, January 13, 2006 2:00 PM

    Subject: RE: [Hai-users] Temp sensors accuracy again.

     

    In my case, the thermostats readings are very accurate; it is the Temp.Humid sensor's that are off.

    The new temp/humid sensors can not be calibrated. The Thermostats can be if needed.

     


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    From: Wenzel, Guy [mailto:Guy.Wenzel at capella.edu] 
    Sent: Friday, January 13, 2006 12:40 PM
    To: Brad
    Cc: hai-users at tssi.com
    Subject: RE: [Hai-users] Temp sensors accuracy again.

     

    I have a similar setup with an Omnistat and a Temp sensor in the hallway near the same room and see the same 3 - 5 degree difference.  I have not cheeked to see which is more correct.  Does anyone else know if it can be adjusted or just the thermostat?

     

     


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    From: hai-users-bounces at tssi.com [mailto:hai-users-bounces at tssi.com] On Behalf Of Brad
    Sent: Friday, January 13, 2006 12:19 PM
    To: hai-users at tssi.com
    Subject: [Hai-users] Temp sensors accuracy again.

     Just installed 3 HAI temp/humidity sensors. Also installed 3 HAI OmniStats with remote temp sensors. The Thermostat remote sensors and the Temp/Humidity sensors are mounted on inside walls within 6 inches of each other, each set in a different room. Temp/Humidity sensors show temps being 3-5 degrees higher than the thermostats show.

    Apparently HAI STILL has not resolved the issue of the Temp/Humid sensor's being inaccurate.

    The Humidity is reading low on them as well. Very frustrating.

    Anyone else seeing this?


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