Campbell CS240, Product Manual

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CS240DM values, the Start parameter needs to be 1 and the Length parameter needs to be 5.
ModbusOption
is an optional parameter described in the CRBasic Editor Help.
For more information, refer to CS240DM program (p. 31).
8. Operation
This section discusses the following:
8.1 Electrical noisy environments 16
8.2 Long cable lengths 16
8.3 Modbus register map 18
8.4 CS240DM and Device Configuration Utility 19
8.1 Electrical noisy environments
AC power lines, pumps, power inverters, and motors can be the source of electrical noise. If the
CS240 sensor or data logger is located in an electrically noisy environment, the CS240 sensor
should be measured with the 60 or 50 Hz rejection option.
8.2 Long cable lengths
Placement of the cable inside a rugged conduit is advisable for cable runs over 4.5 m (15 ft),
especially in locations subject to digging, mowing, traffic, power tools, animals, or lightning
strikes.
8.2.1 CS240 cable resistance/long cable lengths
Cable resistance can cause significant error ( FIGURE 8-1 (p. 17)). The 4-wire half bridge
configuration is the best configuration for long cable lengths.
CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors 16