Campbell CDM-A100 Series, Инструкция по эксплуатации

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CDM-A100 Series
25
The panel temperature is measured with the CDM_PanelTemp() instruction,
where each thermistor is numbered as shown in FIGURE
5-1 , Wiring panel of
CDM-A108 and CDM-A116
(p. 8)
. In thermocouple measurements, using the
panel temperature for the thermocouple-wiring strip will result in more
accurate measurements. CRBasic Example
B-2 , Measuring Thermocouples
(p.
B-2)
, shows how to use the appropriate panel temperature reference for each
thermocouple measurement. Short Cut automatically uses the proper reference.
See the
CR6 Measurement and Control System manual for more details on
making good thermocouple measurements.
FIGURE 8-1. Wiring panel thermistor locations on CDM-A108 (left) and
CDM-A116 (right)
8.2 Fast Measurements
Follow the steps below when designing fast-measurement CDM networks:
1. Work out the time the CDM-A100 will take to make all of the
measurements (Section
8.2.1 , Measurement Speed
(p. 26)
).
2. Calculate the CPI bit rate necessary to keep up with the sum of data
generated by all devices (Section
8.2.2 , CPI Network Bit Rate
(p. 28)
).
3. Determine if the physical layout of your network will allow for the
calculated CPI bit rate (TABLE
8-2 , Network Topology, Bit Rate, and
Cable Length (p. 28) ).
Panel Temp 1
Panel Temp 2
Panel Temp 3
Panel Temp 4