Hydronix Hydro-Probe XT, Руководство пользователя

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Chapter 4 Configuration
36 Hydro-Probe XT User Guide HD0538 Rev: 1.6.0
Selecting ‘Filtered Moisture %’ will configure the sensor to output the calibrated moisture
value.
2.2.4 Average Moisture %
If batch averaging is required it is recommended to use the averaging functionality within
the sensor. The Average Moisture % is the ‘Raw Moisture %’ variable that has been
processed for batch averaging using the sensor’s averaging parameters. To obtain an
average reading, the digital input must be configured to ‘Average/Hold’. When this digital
input is switched high, the Raw Moisture readings are averaged. When the digital input is
low this average value is held constant.
Figure 32 may be used to assist in selecting the correct analogue output variable for a
given system.
Calibration inside sensor?
Averaging in the sensor
using digital input?
Averaging in the sensor
using digital input?
‘Average
Unscaled’
‘Filtered
Unscaled’
‘Average
Moisture’
‘Filtered
Moisture’
YES
YES YES
No
No No* (See Note)
* Note: It would be advisable to average in the control system here
Figure 32: Guidance for setting output variables
2.3
Low % and High%
These two values set the moisture range when the output variable is set to ‘Filtered Moisture
%’ or ‘Average Moisture %’. The default values are 0% and 20% where:
0 - 20mA 0mA represents 0% and 20mA represents 20%
4 - 20mA 4mA represents 0% and 20mA represents 20%
These limits are set for the working range of the moisture and must be matched to the mA to
moisture conversion in the batch controller.