2 sensor hook up, 3 datalogger programming – Campbell Scientific AVW1 and AVW4 Interfaces for Vibrating Wire Sensors User Manual

Page 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.

Table 1 Programs

01:

300

Sec. Execution Interval

01:

Excite,Delay,Volt(SE)

01:

Reps

02:

2500 mV fast Range

03:

IN Chan

04:

Excite all reps w/EXchan 1

05:

Delay (units .01sec)

06: 2500

mV Excitation

07:

Loc [:TEMP C #1]

08:

.001

Mult

09:

0.0000

Offset