Campbell Scientific AL200 ALERT2 Encoder, Modulator, and Sensor Interface User Manual
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AL200 ALERT2 Encoder, Modulator, and Sensor Interface
•
Set the
Sensor Scan Interval – This is how often the AL200 will
power up and measure attached and enabled sensors. Value is
expressed in seconds.
•
Set the
SW12 Warm Up Time – This is the amount of time in
seconds that the AL200 will wait after powering up attached sensors
before making a measurement.
•
Set the
P1 Mode – Enable or disable the pulse count channel
depending on whether or not it is being used.
•
Set the
SE1 Mode – Set to Millivolt if using a sensor that has a single
ended voltage output. Set to
Milliamp if sensor has a single ended
current output or 4-20 mA loop output.
•
Set the
SE1 ALERT2 Sensor ID – This is the sensor ID of the sensor
connected to the SE1 channel. See Appendix G, List of
Recommended Sensor IDs, for a list of recommended sensor ID
values.
•
Set the
SE1 Multiplier – This is a sensor specific value that along
with the SE1 Offset will be used to convert the analog output of a
sensor to an engineering unit. See Appendix H, Calculating
Multipliers and Offsets, for how to calculate multipliers and offsets.
•
Set the
SE1 Offset – This is a sensor specific value that along with the
SE1 Multiplier will be used to convert the analog output of a sensor to
an engineering unit. See Appendix H, Calculating Multipliers and
Offsets, for how to calculate multipliers and offsets.
•
Set the
SE1 Tx Change – This is the threshold which a calculated
value for the SE1 measurement must exceed in order to trigger a data
transmission.
•
Set the
C1 Mode – Set to Status to configure C1 to read a dry contact
(commonly a float switch). Set to
SDI-12 to configure for use with an
SDI-12 type sensor.
•
Set the
C1 ALERT2 Sensor ID – This is the sensor ID of the sensor
connected to the C1 channel. See Appendix G, List of Recommended
Sensor IDs, for a list of recommended sensor ID values.
•
Set the
SDI-12 Command – This is the measurement command that
will be sent to the attached SDI-12 sensor. The format is xM!, where
x is the SDI-12 address.
•
Set the
SDI-12 Value to Send – If the attached SDI-12 sensor returns
more than one value, select which value will be used.
•
Set the
SDI-12 Multiplier – (1) – This is a sensor specific value that
along with the SDI-12 Offset will be used to convert the analog output
of a sensor to an engineering unit. See Appendix H, Calculating
Multipliers and Offsets, for how to calculate multipliers and offsets.
(Note that most SDI-12 sensors do not require a multiplier or offset
except for unit conversion.)
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