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Section 4. Sensor Support
Several features give the CR200(X) the flexibility to measure many sensor
types. Contact a Campbell Scientific applications engineer if assistance is
required to assess sensor compatibility.
4.1 Powering Sensors
Read More!
See
CR200(X) Power Supply
(p. 53).
The CR200(X) is a convenient router of power for sensors and peripherals
requiring a 2.5, 5 or 12 VDC source. It has one program-controlled switched 12
Volt terminal (SW Battery), and two switched voltage excitation terminals
(VX1, VX2). These terminals limit current internally for protection against
accidental short circuits. Sensors can be powered continuously by connecting to
the B terminal, which is the same as connecting sensors directly to the
external battery.
Voltage on the B and SW Battery terminals will changed with the DC
supply used to power the CR200(X). The switched voltage excitation terminals
are typically used to supply a brief excitation for a bridge measurement with the
ExDelSE () instruction, but can also be programmed to provide a continuous 2.5
V or 5 V using the Excite () instruction, which is enough to power many
sensors.
Switched Unregulated (Nominal 12 Volt)
(p. 38) shows the current
limits of SW Battery. Greatly reduced output voltages associated with SW
Battery, VX1, and VX2 due to current limit may occur if the current limits
given in the table in
TABLE. Current Sourcing Limits
p. 38 are exceeded.
4.1.1
Switched Precision
Voltage (0, 2500, 5000 mV)
Two switched analog output (excitation) terminals, VX1 and VX2, operate
under program control. Check the accuracy specification of these channels in
Specifications
(p. 35) to understand their limitations. Specifications are only
applicable for loads not exceeding ±25 mA for 2.5 V excitation, or 10 mA for 5
V excitation. CRBASIC instructions that control excitation channels include:
•
ExDelSE ()
•
ExciteV ()
4.1.2
Continuous Unregulated (Nominal 12 Volt)
Voltage on the B terminal will change with the CR200(X) external
battery voltage.
Содержание CR200
Страница 32: ...Section 2 Quickstart Tutorial 22 ...
Страница 45: ...Section 3 Overview 35 3 3 Specifications ...
Страница 46: ...Section 3 Overview 36 ...
Страница 58: ...Section 4 Sensor Support 48 ...
Страница 62: ...Section 5 Measurement and Control Peripherals 52 ...
Страница 78: ...Section 8 CR200 X Configuration 68 ...
Страница 102: ...Section 9 Programming 92 ...
Страница 138: ...Section 11 Programming Resource Library 128 ...
Страница 156: ...Section 16 Support Software 146 ...
Страница 160: ...Section 17 Care and Maintenance 150 ...
Страница 166: ...Section 18 Troubleshooting 156 18 3 3 Diagnosis and Fix Procedures 18 3 3 1 Battery Voltage Test ...
Страница 167: ...Section 18 Troubleshooting 157 18 3 3 2 Charging Circuit Test Solar Panel ...
Страница 168: ...Section 18 Troubleshooting 158 18 3 3 3 Charging Circuit Test Transformer ...
Страница 169: ...Section 18 Troubleshooting 159 18 3 3 4 Adjusting Charging Circuit Voltage ...
Страница 170: ...Section 18 Troubleshooting 160 ...
Страница 184: ...Appendix A Glossary 14 ...
Страница 190: ...Appendix B Status Table and Settings 20 ...
Страница 192: ...Appendix C Serial Port Pin Outs 22 ...
Страница 211: ......