Sutron Xpert2, Руководство по эксплуатации и обслуживанию

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Analog (ADC)
Inputs
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Outputs
AIOData
Wiring
This section discusses the many different ways to use the ADC block from a wiring perspective.
Excitation
Many sensors are resistive or ratiometric in nature and need an excitation voltage. A
programmable excitation is available that is turned on during the measurement by checking the
“Excitation On” box.
Any of the 6 analog channels can also provide the excitation output. Select which channel to use
as well as the appropriate excitation voltage. When needed, the Xpert will measure the excitation
output voltage.
NOTE: DO NOT USE CHANNELS ABOVE 8 FOR EXCITATION.
Voltage – Single Ended
Sensor Vout connect to any analog channel CH1..CH6
Voltage – Differential
Sensor V+, V- connect to any pair of analog Channels CH1/CH2, CH3/CH4 or CH5/CH6. The
lower channel of each pair is for the + connection on the Xpert and should be the channel that is
measured.
Current 4-20 ma
Connect the sensor to Vbat or +12 SW. Connect the other end of the sensor to the selected
analog channel CH1..CH6.
DC Resistance – General Information
Resistance measurements always require excitation on and a selection for the excitation voltage.
The excitation channel may be different from the measurement channel for 3 and 4 wire
measurements.
DC Resistance – 2 wire
Set excitation channel to match input channel.