Section 3. Programming; Programming Sensor Measurements - Campbell 012 Operator's Manual

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Table Of Contents

Table of Contents

The CR10 Measurement and Control Module begins executing the program stored in its PROM when

power is connected to the weather station. This "program-on-power-up" function is not found in standard

CR10s where users enter their own programs. Users desiring additional sensors or outputs different

from this "standard" program may create their own program and overwrite the existing one.

The resident program listed in Appendix A measures wind speed, wind direction, air temperature,

relative humidity, solar radiation, and rain every 10 seconds. Soil temperature is measured only if

enabled by the user; Flag 1 = 1 (Section 2.9).

The program stores hourly, daily and conditional data as shown below.

Hourly Output

01: Array ID 129

02: Day

03: Hour, Minute

04: Avg. Temperature (F)

05: Instantaneous RH (%)

06: Avg. Solar Radiation (kW/m

07: Avg. Wind Speed (mph)

08: Wind Speed Weighted Avg. Dir.

09: Standard Deviation of Wind Dir.

optional (Flag 1 set high)

10: Soil Temperature (F)

Conditional Output

1 Minute Rain Fall Intensity

01: Array ID 124

02: Hour, Minute

03: Rain Fall (inches)

Appendix A is a listing of the resident program.

3.1 PROGRAMMING SENSOR

MEASUREMENTS

The instructions used to measure and convert

sensor signals to the values displayed in Input

Memory (*6 Mode) are discussed in the

following pages. The standard sensors are

assigned fixed CR10 Input Channels and

Excitation Ports. These and other

measurement parameters used in the program

are summarized in Table 3-2.