Campbell Scientific does not recommend splicing any cable into the existing cable. Splicing a cable could introduce water and electrical noise into the connection. The sensor can be ordered with longer cable lengths, and 50 m is right on the edge of the recommended length. With a cable this long, Campbell Scientific recommends measuring the sensor differentially using the following wiring conventions:
|
Wire Color |
Data Logger Channel |
|
RED |
Diff Channel H |
|
BLACK |
Diff Channel L |
|
CLEAR (SHIELD) |
AG or Ground Symbol |
|
JUMPER WIRE |
Diff Channel L to AG or Ground Symbol |
In the data logger program, a differential voltage instruction needs to be used instead of a single-ended voltage instruction.