Configuration and Calibration Guide HD0679 Rev 1.2.0 19
3.2
Inputs/Output Configuration Settings
3.2.1
High Limit and Low Limit (Alarms)
The High Limit and Low Limit may be set for both the moisture % and the sensor Unscaled
value. The two parameters operate independently. The Bin Empty output will activate
when the reading is below the Low Limit. The Data Invalid output will activate when the
reading is above the High Limit or below the Low Limit.
3.2.2
Material Temperature High and Low limits (Alarm)
The Material High and Low Limits are used to configure the Material Temperature alarm. If
Digital Input/Output 2 is set to Material Temperature Alarm the output will become active if
the material temperature sensor is above the high limit or below the low limit.
3.2.3
Auto-Track Deviation Threshold
The Auto-Track Deviation Threshold is used to configure the Auto-Track Stable alarm. The
output if configured will become active if the deviation of the Filtered Unscaled reading is
below this limit.
3.2.4
Auto-Track Time
The Auto-Track Time sets the amount of data, in seconds, that is averaged to calculate the
Auto-Track deviation.
4 Averaging Parameters
During averaging the sensor uses the Raw or Filtered Unscaled value (user configured) in its
calculations. The following parameters determine how the data is processed for batch averaging
when using the digital input or remote averaging. They are not normally used for continuous
processes.
4.1
High Limit and Low Limit
The High Limit and Low Limit may be set for both the moisture % and the Unscaled value.
The two parameters operate independently. If the sensor reading falls outside of these limits
during sensor averaging the data will be excluded from the average calculation.
This is configured using the High / Low limits in the Input/Output configuration (section
3.2.1).
4.2
Average/Hold Delay
When using the sensor to measure the moisture content of a material as it is discharged from
a bin or silo, there is frequently a short delay between the control signal issued to begin the
batch and the material beginning to flow over the sensor. Moisture readings during this time
should be excluded from the batch average value as they are likely to be unrepresentative
static measurements. The ‘Average/Hold’ delay value sets the duration of this initial exclusion
period. For most applications 0.5 seconds will be adequate but it may be desirable to
increase this value. Options are: 0, 0.5, 1, 1.5, 2 and 5 seconds.
4.3
Averaging Mode
Sets the averaging mode used when calculating the average. The modes available are, ‘Raw’
(Unscaled/Moisture) and ‘Filtered’ (Unscaled/Moisture). For applications where mechanical
apparatus, such as mixer paddles or screws, pass over the sensor and affect the reading the
use of the ‘Filtered’ value will remove the peaks and troughs in the signal. If the material flow
Summary of Contents for Hydro-Mix
Page 4: ...4 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
Page 6: ...6 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
Page 8: ...8 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
Page 10: ...10 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
Page 14: ...Chapter 1 Introduction 14 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
Page 28: ...Chapter 2 Configuration 28 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
Page 42: ...Chapter 4 Best Practices 42 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
Page 48: ...Chapter 5 Sensor Diagnostics 48 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
Page 52: ...Appendix A Document Cross Reference 52 Configuration and Calibration Guide HD0679 Rev 1 2 0 ...
