Campbell-scientific BlackGlobe Temperature Sensor for Heat Stress Manuel d'utilisateur télécharger pdf (Page 21)

Appendix B. Edlog Programming

Examples

B.1 Example CR10X Program

Instruction 5 (AC Half Bridge) is used to measure the thermistor probe inside

the sphere. Instruction 55 (Polynomial) is used to calculate the temperature

in degrees Celsius. The polynomial coefficients are shown in TABLE B-1.

Thermistor resistance and computed temperature over a –10 to +84°C range is

shown in TABLE B-2. The example includes instructions for measuring an

HC2S3 to supply air temperature and relative humidity values. Calculations

for dewpoint, wet-bulb, and wet-bulb globe temperature are also included.

;{CR10X}

;Program: BLACKGLOBE.CSI

;Date: June 2013

*Table 1 Program

01: 5.0000 Execution Interval (seconds)

1: Batt Voltage (P10)

1: 1 Loc [ BattVolt ]

2: Internal Temperature (P17)

1: 2 Loc [ CR10XTmpC ]

;Rotronic HC2S3 temperature and relative humidity.

;Sensor powered on all the time.

3: Volt (SE) (P1)

1: 1 Reps

2: 5 2500 mV Slow Range

3: 1 SE Channel

4: 4 Loc [ AirTempC ]

5: 0.1 Multiplier

6: -40 Offset

4: Volt (SE) (P1)

1: 1 Reps

2: 5 2500 mV Slow Range

3: 2 SE Channel

4: 5 Loc [ AirRH ]

5: 0.1 Multiplier

6: 0 Offset

5: If (X<=>F) (P89)

1: 5 X Loc [ AirRH ]

2: 3 >=

3: 100 F

4: 30 Then Do

B-1

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 31 32

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Campbell-scientific BlackGlobe Temperature Sensor for Heat Stress Manuel d'utilisateur Page 21