Chapter 2 Configuration
18 Configuration and Calibration Guide HD0679 Rev 1.2.0
Moisture/Temperature: Allows the user to switch the analogue output between the
measurements of Unscaled or Moisture (whichever is set) and
temperature. This is used when the temperature output is required
whilst still using only one analogue output. With the input inactive,
the analogue output will indicate the appropriate moisture variable
(Unscaled or moisture). When the input is activated, the analogue
output will indicate the material temperature (in degrees
centigrade).
Temperature scaling on the analogue output is fixed – zero scale
(0 or 4mA) corresponds to 0°C and full scale (20mA) to 100°C.
Mixer Sync: A new synchronised measurement cycle is started when the input
goes active.
The second digital input/output can be set as an input for Moisture/Temperature but can also
be set to the following outputs:
Bin Empty: This output is activated if the Unscaled or Moisture values go
below the Low Limits defined in the Averaging section. This can be
used to signal to an operator when the sensor is in air (as the
sensor’s value goes to zero in air) and can indicate a vessel empty
state.
Data out of range: The output will be active if the moisture reading is above or below
the moisture include limits or the Unscaled is above or below the
Unscaled include limits
Sensor OK: This output will be active if:
• The frequency reading is between the defined air and water
calibration points +/-3%
• The amplitude reading is between the defined air and water
calibration points +/-3%
• The temperature of the internal electronics is below the safe
operating limit
• The temperature of the RF resonator is above it’s safe
operating limit
• The internal supply voltage is in range
Material Temp alarm: The alarm will be active if the material temperature is outside the
configured high/low limits
Calibration out of range: The output will be active if the Unscaled reading, for any of the
measurement modes, is more than 3 points above or below the
range of Unscaled values used in the calibration. This can be used to
indicate that another calibration point could/ should be made.
Auto-Track Stable: Auto-Track Stable indicates if the sensor reading is stable. The
stability is defined as the deviation of a set amount of data points.
Both the deviation value and the amount of data used, in seconds,
are configurable in the sensor. The output will be active if the Auto-
Track Deviation is below the Auto-Track Deviation threshold
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