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The GP-HR, General Purpose High Resolution and the GP-MC, General Purpose Multi Channel Logger have a number of averaging and smoothing functions available. These are in addition to the normal averaging mode that is available on HR range of loggers.
Channel 1 Incremental Smoothing
Sometimes we want to smooth out the natural variation in the output of a sensor. We might, for example, have a water level sensor in a lake.Waves on the lake will cause variations in the readings from the sensor. If we can smooth out the readings we will get a better idea of the actual mean lake level. Other applications where this sort of smoothing is required include wind direction vanes and vehicle fuel tank sensors.
Channel 1 of the GP-MC has a special smoothing function built into the logger channel. This function works with the raw data from the analog to digital converter. It restricts the speed at which readings can change. This has the effect of removing the peaks and troughs without effecting the resolution or accuracy of readings.
If Channel 1 Incremental Smoothing is set to 0, there is no smoothing and the channel behaves like all other channels.
If Channel 1 Incremental Smoothing is set to 1, the readings can only change by 1 analog to digital converter count every logging period or averaging sub interval so the reading will change very very slowly causing extreme smoothing of data.
Typically the Channel 1 Incremental Smoothing will be set from around 128 to 1024. You will need to determine this value experimentally for your particular application.
Fast Pulse Channel Average Time
(Also called: Windspeed Average Time, Frequency Average Time and Pulse Average Time)
The Fast Pulse channel of the GP-HR (Channel 4) and GP-MC (Channel 10) has a special averaging function.This is used mainly when a wind speed unit is connected to the timer 1 counter input. If the Fast Pulse Channel Average Time is set to 0 the channel acts as a counter. If it is set to 1, the channel will count the number of pulses in a second and keep a running average of the count.
Averaging Sub Interval
Averaging sub interval is in seconds. This is the period of time between reading of the probes when averaging, maximum and minimum are calculated. If set to 1 second then the averaging is done on a 1 second period.