Campbell Scientific CS10-L and CS15-L Current Transformers - Manual (Page 25)

Appendix A. Theory of Operation
A.4 Multiplier
Use Equation D to calculate the multiplier.
m=C*n
2
/n
1
*(1/R)*(1 V/1000 mV) Equation D
Where, C = a correction constant
If we assume a correction constant of 1, then we can solve for the equation
from the above information.
m = 1 * 2000/1 * (1/10) * (1/1000) = 0.2 multiplier
A.5 CS10/CS15 Comparison
The CS10 consists of a CR Magnectic’s CR8459 Current Transducer with a
10-ohm burden resistor incorporated into its cable (see Figure A-7). The
resistor allows most of our dataloggers to measure it.
CS10-L
FIGURE A-7. CS10 schematic
The CS15, a modified version of the CS10, was developed specifically for the
CR200(X)-series dataloggers. CR200(X)-series dataloggers require special
treatment because they cannot measure negative values; range is only 0 to
2500 mV (see Figure A-9). To create positive reference, the CS15-L uses
Voltage Excitation to shift the measurement range (see Figures A-8 through A-
10).
A-5