Campbell-scientific CS11-L Current Transformer Manual do Utilizador descarregar pdf (Página 17)

CS11-L Current Transformer

TABLE 6-1. Max Amps on Each of the Range Codes in the Datalogger (one pass only).

Datalogger >>>

Range Codes

(mV)

CR200(X)

Series

CR10X

CR500

CR510

CR1000

CR800

CR850

CR21X CR23X CR3000

Amperage

Resolution

2.5 0.5 0.5 0.000133

5 1 0.000067

7.5 1.5 1.5 0.000400

10 2 0.000133

15 3 0.000200

20 4 0.000134

25 5 5 0.001334

50 10 10 10 0.000666

200 40 40 0.002660

250 50 50 0.013340

500 100 0.006660

1000 200 200 0.013320

2500 125 200 200 0.133400

5000 200 200 200 200 0.066600

6.1 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 (for example, negative value for channel number). The

SpaDevSpa instruction calculates rms.

Program must be run in the pipeline mode on CRBasic

dataloggers.

NOTE

It is important to measure complete cycles. If 100 measurements are taken

during a 0.1 second time period, the result will be five complete cycles for a 50

Hz waveform or six complete cycles for a 60 Hz waveform.

Do not average the waveform reading in the data table nor

use the 60 Hz or 50 Hz noise rejection in the measurement

instructions in the program. Doing so would result in an

incorrect zero amperage reading.

CAUTION

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