The first basic calibration is the "salt" (sea salt Sodium chloride humififié slightly - or after a stint in the microwave showing steam disengage gives a relative humidity of 75% precisely So just. take a jar, to split a plug - yarn path - and to enclose the sensor) the software then shows a nice curve. when the curve is flat, there is more to adjust the calibration with the optional function (15 continuous days RAS).
For temperature, I calibrated at 100 ° C (over a saturated vapor also provides the 100% humidity) at 0 ° C and with a calibrated thermometer. RAS, (but before calibration there was 7 ° C error)
Without calibration, the values have a difference of 10%.
The software package is quite complete (dll, ocx, seasonally adjusted export
But it stops there, the old product (2010) has obviously been recently taken over and there is no technical support France or US (AR mall are in Chinese) reliable (received a message, then total silence for a month, despite 7 messages - no follow) a recovery seems underway, but is clearly not in place.
I needed the support because the software is not updated correctly for Win7 and 8, no it does not work but seems seems to write its settings to nonexistent folders and can save making the product unusable.
Other elements let me think that the software was under development when the company entered into lethargy there 3 years (see forum).
Without this major defect, both soft and support I probably would have given a 5 star.
If the manufacturer wants to survive he must react.
Yet there is no equivalent product on the market.
