Campbell CS110, Инструкция по эксплуатации

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Instruction Manual
3
1.5 Digital I/O
Three general purpose 0 to 5 V digital I/O lines are available on the CS110 Power
cable (CS110CBL3) that attaches to the circular power connector on the underside
of the CS110. The blue, yellow, and green wires connect to control ports C1, C2,
and C3 respectively. Using CRBasic, these digital I/O lines can be used to
conditionally turn on alarms, provide an interrupt or pulsed signal to be measured
by the CS110, or as a serial communication port.
1.6 Self-Check Features
The CS110 has been designed to provide reliable electric field measurements and
to minimize and simplify maintenance. The CS110 incorporates extensive self-
checking for each measurement in an effort to identify measurement problems and
reduce or eliminate scheduled maintenance. The status code returned from each
electric field measurement reports on instrument health along with any
measurement problems as described in Appendix A.
For example, insulator leakage current is measured during each electric field
measurement, indicating the cleanliness of electrode insulators. A leakage current
compensation circuit for the charge amplifier input is incorporated in the CS110 to
minimize the effects of insulator leakage current on measured results (Patent
pending). A status code indicating excessive leakage current is returned if the
measured input leakage current exceeds the compensation range due to insulator
cleanliness problems.
A relative humidity sensor is included inside the CS110 case to provide
information on when case desiccant should be changed. The CS110 also provides
measurement of the battery input voltage in order to monitor the input power to
the instrument. Section 7 discusses CS110 electric field measurement details.
CS110 maintenance details are discussed in Section 10.