Campbell Scientific CVD20 20:1 Voltage Divider - Manual (Page 8)

CVD20 20:1 Voltage Divider
1). A two-foot length should be sufficient if the datalogger and CVD20 are
housed in the same enclosure.
TABLE 1. Recommended Cables for Datalogger Connection
Number of Single-ended
or Differential Channels
Connected
Recommended Cable(s)
1 (1) CABLE2CBL-L
2 (1) CABLE4CBL-L
3 (1) CABLE2CBL-L and (1) CABLE4CBL-L
4 (2) CABLE4CBL-L
5 (1) CABLE2CBL-L and (2) CABLE4CBL-L
6 (3) CABLE4CBL-L
FIGURE 1. Single-ended measurement
FIGURE 2. Differential measurement
6. Programming
The output of the voltage divider can be measured with a differential voltage
instruction (VoltDiff() in CRBasic or Instruction 2 (P2) in Edlog) or a single-
ended voltage instruction (VoltSe() in CRBasic or Instruction 1 (P1) in Edlog).
Select the smallest input voltage range that will accommodate the maximum
expected output. The smallest possible range will provide the best resolution.
CVD20 20:1 VOLTAGE DIVIDER DATALOGGER
AG or
CVD20 20:1 VOLTAGE DIVIDER
2