Gotty1, - My new VP2 Pro reads inside temperature 4 to 5 degrees F high with the light OFF. This is the second console with the same error.
Compared to what? I call BS because with scientific calibrated thermometer I've never seen over a couple degrees. Thats with no air flow with air flow .4 tenths is the max off set.
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Thanks ValentineWeather,
Brett, Technical Support Manager at Davis in Hayward, told me that the IP data logger produces so much heat that the VP2 console is programmed to sense that logger is connected and offset the displayed temperature three degrees lower than sensed. I suppose he could be wrong.
Brett noted that air motion (ceiling fan off or on) would influence how much of the data logger's heat reached the sensor, and that the offset was not an elegant solution.
Because I lack an NIST-traceable reference, I used several other temperature measuring devices, including two Oregon Scientific Model EMR812s, a Fluke thermocouple, a LaCross WS-9611U, aThermoWorks Thermapen 5, a AllTrade 480742 infrared thermometer, and the Davis WeatherMonitor II that is being replaced. I realize that none of those may be correct, yet they all indicate within a degree of each other and substantially lower than either the original VP2 or its replacement. It could be that the VP2 Pro is correct and the others are all offset the same, but those odds seem long.
Also, when the VP2 is first turned on, after being off for a few hours, it indicates what those other instruments display and then creeps up to much higher.
What instrument do you use to be certain that your VP2 has a maximum of 0.04-degree Fahrenheit offset from true ambient temperature? If you don't mind, where did you get your reference instrument, and what did it cost?
I am willing to pay something extra to have the VP2 console display the inside ambient temperature within a degree of actual, but I have not found a method to do that yet. I am looking for advice.