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2 total solar radiation – Campbell Scientific CM3 Kipp and Zonen Pyranometer User Manual

Page 11

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CM3 Pyranometer

7

Example 1

;{CR10X}
;
*Table 1 Program

01: 10

Execution Interval (seconds)

1: Volt (Diff) (P2)

1:

1

Reps

2:

24

250 mV 60 Hz Rejection Range

3:

1

DIFF Channel

4:

1

Loc [ W_m2 ]

5:

45.725

Mult ;multiplier = (1 / 0.02187 mV / W/m2)

6:

0.0

Offset

;Set negative values to zero.
;
2: If (X<=>F) (P89)

1:

1

X Loc [ W_m2 ]

2:

4

<

3:

0

F

4:

30

Then Do

3: Z=F x 10^n (P30)

1:

0.0

F

2:

00

n, Exponent of 10

3:

1

Z Loc [ W_m2 ]

4: End (P95)

5: If time is (P92)

1:

0

Minutes (Seconds --) into a

2:

60

Interval (same units as above)

3:

10

Set Output Flag High (Flag 0)

6: Real Time (P77)

1:

1220

Year,Day,Hour/Minute (midnight = 2400)

7: Average (P71)

1:

1

Reps

2:

1

Loc [ W_m2 ]

*Table 2 Program

02: 0.0000

Execution Interval (seconds)

*Table 3 Subroutines

End Program

5.2 Total Solar Radiation

In Example 2 a CR10X is used to record daily total flux density. This total flux
density is in MJ m

-2

day

-1

to avoid the need for high resolution discussed in

5.2.1. Negative values are set to zero before they are added to the running
total.