Campbell Scientific CS10-L and CS15-L Current Transformers - Manual (Page 9)

CS10-L and CS15-L Current Transformers
4. Wiring
The CS10-L and CS15-L use a single-ended analog channel as follows.
CS10-L CS15-L
White Single-Ended Channel Red EX
Black AG or White SE
Shield AG or Black
Shield
5. Programming
SCWIN users: This manual was written primarily for those
whose needs are not met by SCWin. Your procedure is much
simpler: just add the CS10-L or CS15 (in the Miscellaneous
Sensors folder), save your program, and follow the wiring shown
in Step 2 of SCWin. NOTE
The datalogger is programmed using either CRBasic or Edlog. Dataloggers
that use CRBasic include our CR200(X)-series, CR800, CR850, CR1000, and
CR3000. Dataloggers that use Edlog include our CR510, CR10(X), and
CR23X. In CRBasic, the VoltSE instruction is used to measure the sensor. In
Edlog, a P1 instruction is used.
In order to monitor the amperage of an alternating current circuit, the program
must take many samples from the CS10-L or CS15-L sensor to capture the
waveform over a specified time, and then calculate the average energy under
the curve. There are many methods to do this, depending on the datalogger,
the untapped programming capacity, and other factors.
5.1 CR800, CR850, CR1000, or CR3000 Programming
With these dataloggers, the best method for monitoring amperage is to make
millivolt burst measurements, and then calculate RMS. The millivolt burst
measurements are made by using the VoltSE instruction with multiple reps on
the same channel (i.e., negative value for channel number). The SpaDevSpa
instruction calculates RMS.
Program must be run in the pipeline mode. NOTE
It is important to get complete cycles. If you make 100 measurements during a
0.1 second time period, you’ll get five complete cycles for a 50 Hz waveform
or six complete cycles for a 60 Hz waveform.
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