Campbell-scientific AVW1 and AVW4 Interfaces for Vibrating Wire Sensor Manual do Utilizador descarregar pdf (Página 22)

AVW1/AVW4

5-2

5.2 SENSOR HOOK UP

FIGURE 5.2-1. Hook up for AVW4

5.3 DATALOGGER PROGRAMMING

The following is a sample program that

measures four sealed Geokon sensors and

stores the temperature, pressure, pressure

corrected for temperature, and barometric

corrected pressure in psi in Input Locations 1..4,

5..8, 9..12, and 10..12 respectively. The

example utilizes the calibration data given

previously from sensor number 3998. The first

sensor measures barometric pressure only and

is used to remove atmospheric pressure

changes from the readings on the other three

sensors. This example assumes the sensors

have been connected as shown in the sensor

hookup diagram.

Program: AVW4 & CR10 USED TO MEASURE

4 GEOKON SENSORS. THE FIRST SENSOR

SERVES AS A BAROMETER AND IS

SUBTRACTED FROM THE OTHER THREE

TO MEASURE THREE WATER PRESSURES

IN PSI EVERY FIVE MINUTES.

* 1 Table 1 Programs

01: 300 Sec. Execution Interval

01: P4 Excite,Delay,Volt(SE)

01: 4 Reps

02: 15 2500 mV fast Range

03: 1 IN Chan

04: 1 Excite all reps w/EXchan 1

05: 1 Delay (units .01sec)

06: 2500 mV Excitation

07: 1 Loc [:TEMP C #1]

08: .001 Mult

09: 0.0000 Offset

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 35 36

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Campbell-scientific AVW1 and AVW4 Interfaces for Vibrating Wire Sensor Manual do Utilizador Página 22