Campbell-scientific CS431 Submersible Pressure Transducer Manual do Utilizador descarregar pdf (Página 10)

CS431 Submersible Pressure Transducer

This function is designed for the thermistor used in the CS431. It

automatically selects the excitation voltage and processes the result using the

Steinhart-Hart calculation to get an output in degrees centigrade.

5.1.1 Example CRBasic Programs

The following two examples are for the CR1000 but other CRBasic

dataloggers are programmed similarly. Table 5-1 shows the wiring used for

these examples.

TABLE 5-1. CR1000 Connections for Example Programs

Single Ended

Channel Number

Differential

Channel Number

Sensor 1

Sensor2

1 1H 1 1H Vr+ (Blue)

2 1L Vr- (Red)

AG (Green)

3 2H Vo+ (Yellow)

4 2L Vo- (Purple)

Temperature AG (Black)

5 3H Temperature Out (Brown)

6 3L Temperature Out (Brown)

7 4H Vr+ (Blue)

8 4L Vr- (Red)

AG (Green)

Ex1 Excite (White) Excite (White)

9 5H Vo+ (Yellow)

10 5L Vo- (Purple)

Temperature AG (Black)

Ex2 Temperature Excite (Orange) Temperature Excite (Orange)

Ground Lug Shield Shield

5.1.1.1 Example CR1000 P

ROGRAM – STANDARD CALIBRATION – Two Sensors

'Program = Sample Program for two CS431s

'Sensor 1 is 5 psig, Sensor 2 is 15 psig

'Declare Variables and Units

Public Mult(2) 'calibration multiplier, one per sensor

Public Offset(2) 'calibration offset, one per sensor

'multipliers and offsets provided on INW calibration sheet

Public V(4) 'reference voltage, then output voltage for each sensor

'For example: V(1)=Vr for 1st sensor, V(2)=Vo for 1st sensor

'V(3)=Vr for 2nd sensor, V)4)=Vo for 2nd sensor

(cont.)

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 21 22

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