[StdQC]

The StdQC service offers a very simple Quality Control that only checks that values are within a minimum and maximum range.

Because this service is normally run after StdConvert, the units to be used should be the same as the target unit system chosen in StdConvert. It is also important that it be run after the calibration service, StdCalibrate and before the archiving service StdArchive, so that it is the calibrated and corrected data that are stored.

In a default configuration, quality control checks are applied to observations from the hardware. They are not applied to derived calculations since the StdWXCalculate service runs after the quality control.

[[MinMax]]

In this section you list the observation types you wish to have checked, along with their minimum and maximum values. If not specified, the units should are in the same unit system as specified in [StdConvert].

For example,

[[MinMax]]
    outTemp = -40, 120
    barometer = 28, 32.5
    outHumidity = 0, 100 

With target_unit=US (the default), if a temperature should fall outside the inclusive range -40 °F through 120 °F, then it will be set to the null value, None, and ignored. In a similar manner, the acceptable values for barometric pressure would be 28 through 32.5 inHg, for humidity 0 through 100%.

You can also specify units.

For example,

[[MinMax]]
    outTemp = -40, 60, degree_C
    barometer = 28, 32.5, inHg

In this example, if a temperature should fall outside the inclusive range -40 °C through 60 °C, then it will be set to the null value, None, and ignored. In a similar manner, the acceptable values for barometric pressure would be 28 through 32.5 inHg. Since the units have been specified, these values apply no matter what the target_unit.

Both LOOP and archive data will be checked.

Knowing the details of how your hardware encodes data helps to minimize the number of observations that need to be checked. For example, the VP2 devotes only one unsigned byte to storing wind speed, and even then 0xff is devoted to a bad value, so the only possible values that could appear are 0 through 126 mph, a reasonable range. So, for the VP2, there is no real point in checking wind speed.