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INSTRUCTION MANUAL

CM3 Pyranometer

Revision: 10/02

C o p y r i g h t ( c ) 1 9 9 9 - 2 0 0 2

C a m p b e l l S c i e n t i f i c , I n c .

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Содержание CM3

Страница 1: ...INSTRUCTION MANUAL CM3 Pyranometer Revision 10 02 C o p y r i g h t c 1 9 9 9 2 0 0 2 C a m p b e l l S c i e n t i f i c I n c ...

Страница 2: ... warranties expressed or implied including warranties of merchantability or fitness for a particular purpose CAMPBELL SCIENTIFIC INC is not liable for special indirect incidental or consequential damages Products may not be returned without prior authorization The following contact information is for US and International customers residing in countries served by Campbell Scientific Inc directly Af...

Страница 3: ...xample Programs 6 5 1 Average Solar Radiation 6 5 2 Total Solar Radiation 7 5 2 1 Output Format Considerations 8 6 Maintenance 9 7 Calibration 9 Figures 3 1 CM3 and CM3MT 3 3 2 015 Pyranometer Mounting Arm 3 3 3 025 Crossarm Stand and 019ALU Crossarm 4 3 4 UTKZ Leveling Fixture and Crossarm Mount and UT018 Tower Mounting Bracket and Crossarm 4 4 1 CM3 Wiring 5 Tables 5 1 Multipliers Required for A...

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Страница 5: ...fixture K Z s CAF 1 to measure albedos The CM3 can also be used to measure most types of artificial light Xenon lamps Halogen lamps etc The CM3 pyranometer consists of a thermopile sensor a housing a dome and a cable The thermopile is coated with a black absorbent coating The paint absorbs the radiation and converts it to heat The resultant temperature difference is converted to a voltage by the c...

Страница 6: ...h 15 feet 5 m Level accuracy 1 degree DIMENSIONS SHIPPING DIMENSIONS CM3 3x3x3 in 6x6x6 in CM3MT 1x5x5 in 6x6x6 in WEIGHT SHIPPING WEIGHT CM3 0 8 lbs 3 lbs CM3MT 0 6 lbs 3 lbs 3 Installation The CM3 should be mounted such that it is never shaded by the tripod tower or other sensors To ensure accurate measurements the CM3 should be mounted using the CM3MT base leveling fixture or equivalent The CM3...

Страница 7: ... screws springs slide the CM3MT Mount onto the remaining screw by slightly compressing the spring Slide the remaining two springs between the CM3MT and the 015 or 025 mount and install the remaining two screws Tighten the screws until all three springs have been compressed about 1 8 inch Once the pyranometer mount has been installed on the tripod or tower tighten the appropriate screws until the b...

Страница 8: ... of the differential channel On a CR10 X or CR510 the white lead is connected to an analog ground AG and the clear to ground G On the CR23X 21X or CR7 both the white and clear leads are connected to ground While a differential measurement is better and preferred the CM3 can be measured on a single ended channel using Instruction 1 if the power induced voltages discussed in the following paragraph ...

Страница 9: ...uld be avoided The offset does not however affect differential measurements While the 21X is the logger most susceptible to this condition the other dataloggers can be affected if the amount of power is too large or the power return line is connected to analog ground AG FIGURE 4 1 CM3 Wiring Color Function CR10 X CR510 21X CR7 CR23X Red Signal Differential Channel H Differential Channel H Differen...

Страница 10: ...voltage will be 15 52 5 mV Example 21 87 x 10 6 V W 1 m2 1500 W m 2 0 03281 V or 32 81 mV TABLE 5 1 Multipliers Required for Average Flux and Total Flux Density in SI and English Units UNITS MULTIPLIERS W m 2 1 103 C average MJ m 2 t C 109 total kJ m 2 t C 106 total cal cm 2 min 1 14333 106 C average cal cm 2 t C 0 02389 106 total C CM3 calibration eg 21 87x10 6 V W m 2 t datalogger execution inte...

Страница 11: ...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 to...

Страница 12: ...uring post processing multiply the average flux by the number of seconds in the output interval to arrive at an output interval flux density Sum the output interval totals over a day to find a daily total flux density Another alternative is to record total flux using the high resolution format Instruction 78 see Datalogger manual for details The disadvantage of the high resolution format is that i...

Страница 13: ... The debris can be removed using water de ionized or distilled or alcohol 7 Calibration Recalibration is suggested every two years Calibrations can be done in one of two ways One method is to calibrate the sensor in the field by placing a transfer standard a sensor that has been calibrated against a secondary standard next to the sensor being calibrated Preferably daily totals of several days shou...

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Страница 16: ... campbellsci com br suporte campbellsci com br Campbell Scientific Canada Corp CSC 11564 149th Street NW Edmonton Alberta T5M 1W7 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Ltd CSL Campbell Park 80 Hathern Road Shepshed Loughborough LE12 9GX UNITED KINGDOM www campbellsci co uk sales campbellsci co uk Campbell Scientific Ltd France Miniparc du Verger Bat H 1 rue de Te...

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