Campbell AVW200 series Manuel d'instructions télécharger pdf (Page 37)

Figure 4 illustrates the DIP switch SW2 for switching between a GK-403 or Datalogger

application. “DATALOGGER”” is the default SW2 position:

Figure 4 – GK-403/DATALOGGER Selection

MICRO-1000 / 800 (CR1000 / CR800) Mode of Operation

The MICRO-800 and MICRO-1000 (which respectively utilize a CR800 and CR1000

controller, manufactured by Campbell Scientific, Inc. of Logan, Utah) mode of operation

uses two control lines to operate the multiplexer. The RESET line enables the

multiplexer and activates the MICRO-800/MICRO-1000 mode of clocking. Pulses

received on the CLOCK line sequentially increment the channels while the RESET line is

held high. See the timing diagram below;

The CLOCK line sequentially advances the channels beginning with channel 1. Note the

timing diagrams below for 16 and 32 channel switching, respectively.

Reset

Clock

Channel 1

No Channel

Selected

No Channel

Selected

Channel 16

Pulse 1

Pulse 2

Pulse 31

Timing:

T2 = 2 mSsec(min)

T3 = 2

mSsec(min)

T1 = 50 mSec(min.)

Selected

Pulse 32

Figure 7 - 16 Channel MICRO-800/MICRO-1000 Channel Selection Timing

GK-403

DATALOGGER

SW2

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 46 47

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Campbell AVW200 series Manuel d'instructions Page 37