Campbell-scientific CR800 and CR850 Measurement and Control Systems Uživatelský manuál stáhnout pdf (Strana 39)

100

101

Section 4. Quickstart Tutorial

39

Note A period-averaging sensor has a frequency output, but it is connected to a

single-ended analog input channel and measured with the PeriodAverage()

instruction (see Period Averaging

(p. 307) ).

4.1.3.3.1 Pulses Measured

Figure Pulse Sensor Output Signal Types

(p. 39) illustrates three pulse sensor output

signal types.

Figure 7: Pulse-sensor output signal types

4.1.3.3.2 Pulse-Input Channels

Table Pulse-Input Channels and Measurements

(p. 39) lists devices, channels and

options for measuring pulse signals.

Table 2. Pulse-Input Channels and Measurements

Pulse-Input

Channel

Input Type

Data Option

CRBasic

Instruction

P1, P2

• High-frequency

• Low-level ac

• Switch-closure

• Counts

• Frequency

• Run average

of frequency

PulseCount()

C1, C2, C3, C4,

C5, C6, C7, C8

• High-frequency

• Switch-closure

• Low-level ac

(with LLAC4

Low-Level AC

Conversion

Module)

• Counts

• Frequency

• Running

average of

frequency

• Interval

• Period

• State

PulseCount()

TimerIO()

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1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 565 566

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