Operation
94
Modline 5
range. The span can be equivalent to the Sensor’s specified span or narrower. See Section 4
, page 64 for detailed information on analog output signals.
This signal is available from the Blue and Blue/White twisted wire pair of the Sensor cable. See Section
4
SOUT – Analog Output Current Range Selection
Modline 5 Sensors provide a selection of one of two analog output direct current ranges, 0 to 20 mA or
4 to 20 mA. This function selects the desired range.
ZERO – Analog Output Zero Scale Temperature Scaling
This function sets a temperature to correspond to the selected Analog Output Current Range minimum
value (0 or 4 mA). This temperature must be within the Sensor’s specified temperature range and is
limited to a maximum value equivalent to 10°F (-12.2°C) below the Sensor full scale temperature, or,
10°F (-12.2°C) below the adjusted Analog Output Full Scale temperature value (explained below).
Minimum setting is the Sensor specified zero scale temperature. See notes after FULL explanation for
ZERO – FULL °C operation and span setting information.
FULL – Analog Output Full Scale Temperature Scaling
Sets a temperature to correspond to the Analog Output Current Range maximum value (20 mA).
Temperature must be within the Sensor specified temperature range and is limited to a minimum value
10°F (-12.2°C) above the Sensor’s specified zero scale temperature, or, 10F° (-12.2°C) above the adjusted
Analog Output Zero Scale temperature value (explained above). Maximum setting is the Sensor
specified full scale temperature.
For ZERO – FULL span setting.
°F and °C operation: The minimum 10° span is calculated by the Sensor in °F.
When using °C units, the span will be less than 10° because the Sensor first calculates in °F
and then converts to °C. The narrower equivalent °C span is allowed.
Spans more than 30°C (60°F) may be required to obtain acceptable results. Longer response
times may be necessary for very narrow spans to smooth magnified temperature variations
and noise.
5.7.1
Fatl – Analog Output Operation for Sensor or Dirty Window Detector
Malfunction Alarms
Sets the Analog Output current to a specified value when unit is in one of two alarm conditions. A
Sensor failure (Error Code X107) or Dirty Window Detector operation failure (Error Code X109) will
trigger this alarm.
Selectable range is from 0 mA to 24 mA
5.7.2
A–LO – Analog Output Low Temperature Alarm
Sets the Analog Output current value if the measured temperature is below the temperature that
produces Analog Zero Scale Output as determined by the Analog Output Zero Scale Temperature
Scaling explained above. Selectable range is 0 mA to 4 mA for the 4 to 20 mA current output range.
