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Campbell Scientific Companies

Campbell Scientific, Inc. (CSI)

815 West 1800 North

Logan, Utah 84321

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Rua Apinagés, nbr. 2018

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Campbell Scientific Canada Corp. (CSC)

11564 - 149th Street NW

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CANADA

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300 N Cementerio, Edificio Breller

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Please visit www.campbellsci.com to obtain contact information for your local US or international representative.

Содержание CMP11-L

Страница 1: ...CMP6 L CMP11 L and CMP21 L Pyranometers Revision 9 13 C o p y r i g h t 2 0 0 6 2 0 1 3 C a m p b e l l S c i e n t i f i c I n c ...

Страница 2: ......

Страница 3: ...removing reinstalling and shipping defective products to Campbell Campbell will return such products by surface carrier prepaid within the continental United States of America To all other locations Campbell will return such products best way CIP Port of Entry INCOTERM 2010 prepaid This warranty shall not apply to any products which have been subjected to modification misuse neglect improper servi...

Страница 4: ...ng container Campbell Scientific s shipping address is CAMPBELL SCIENTIFIC INC RMA _____ 815 West 1800 North Logan Utah 84321 1784 For all returns the customer must fill out a Statement of Product Cleanliness and Decontamination form and comply with the requirements specified in it The form is available from our web site at www campbellsci com repair A completed form must be either emailed to repa...

Страница 5: ...Ventilation Unit 8 7 Installation 9 7 1 Mounting to a Tripod or Tower 9 7 2 Wiring 11 7 2 1 CMP6 CMP11 and CMP21 Thermopile Schematic 12 7 2 2 CMP6 and CMP11 Wiring 12 7 2 3 CMP21 Wiring 13 7 3 Programming 14 7 3 1 Solar Radiation Measurements 14 7 3 1 1 Input Range 15 7 3 1 2 Multiplier 15 7 3 1 3 Offset 16 7 3 1 4 Output Format Considerations 16 7 3 2 CMP21 Internal Thermistor Measurement 16 7 3...

Страница 6: ...21 8 6 2 Dimensions of the CVF3 8 7 1 CM245 bracket with 2 125 u bolts positioned to mount the pyranometer horizontally on a crossarm 9 7 2 CM245 bracket with 1 5 u bolts positioned to mount pyranometer at a 40 angle on a vertical pipe 10 7 3 Exploded view of the pyranometer mounting 11 7 4 CMP6 CMP11 and CMP21 thermopile detector schematic 12 8 1 Reading is reduced if dome is not dry or clean 23 ...

Страница 7: ...loggers 14 7 5 Multipliers Required for Flux Density and Total Fluxes 15 7 6 CR1000 Wiring for CMP6 Example Program 17 7 7 CR1000 Wiring for CMP11 Example Program 18 7 8 CR1000 Wiring for CMP21 Example Program 19 7 9 CR10X Wiring for CMP6 Example Program 21 A 1 CVF3 Wiring A 4 iii ...

Страница 8: ...Table of Contents iv ...

Страница 9: ...ts Section 3 Initial Inspection Section 4 Quick Start More details are available in the remaining sections 2 Cautionary Statements CMP series pyranometers are rugged but they should be handled as precision scientific instruments Care should be taken when opening the shipping package to not damage or cut the cable jacket If damage to the cable is suspected consult with a Campbell Scientific applica...

Страница 10: ...led horizontally for global horizontal measurements However the pyranometer can be installed at any angle for POA measurements and in the inverted position for reflected measurements In all cases it will measure the solar flux incident on the sensor surface Site the pyranometer to allow easy access for maintenance while ideally avoiding any obstructions above the plane of the sensing element It is...

Страница 11: ...tion 7 1 Mounting to a Tripod Tower for more information FIGURE 4 1 Pyranometer installation CM245 Adjustable Angle Mounting Stand CM2XX Series Crossarm FIGURE 4 2 Pyranometer mounted horizontally for the Northern Hemisphere left and Southern Hemisphere right 3 ...

Страница 12: ...CMP6 L CMP11 L and CMP21 L Pyranometers FIGURE 4 3 Two views of a pyranometer mounted at an angle for the Northern Hemisphere FIGURE 4 4 Pyranometer mounted at an angle for the Southern Hemisphere 4 ...

Страница 13: ...CMP11 is to use Campbell Scientific s SCWin Short Cut Program Generator see FIGURE 4 5 Wire the pyranometer according to the wiring diagram generated by Short Cut The CMP21 is not included in Short Cut Refer to Section 7 Installation for wiring and programming information if not using Short Cut NOTE FIGURE 4 5 SCWin Short Cut Program Generator 5 ...

Страница 14: ...ewired enclosure cable termination option PW Connector that attaches to a CWS900 Wireless Sensor Interface cable termination option CWS The CWS900 enables the pyranometer to be used in a wireless sensor network Please note that this option is not available for the CMP21 5 2 Construction The pyranometers consist of a thermopile sensor housing two glass domes and cable The thermopile is coated with ...

Страница 15: ... 0 to 1000 W m 2 1 0 2 Directional error up to 80 with 1000 W m 2 beam 20 W m 2 10 W m 2 Tilt error at 1000 W m 2 1 0 2 Level accuracy 0 1 Operating temperature 40 to 80 C Temperature dependence of sensitivity 4 10 to 40 C 1 10 to 40 C 1 20 to 50 C Sensitivity 5 to 20 µV W m 2 7 to 14 µV W m 2 Typical signal output for atmospheric applications 0 to 20 mV 0 to 15 mV Weight 0 6 kg 1 3 lb without cab...

Страница 16: ...Unit Compatible Pyanometers CMP6 CMP11 CMP21 Power supply 12 Vdc 1 3 A with 10 W Heater Operating temperature range 40 to 70 C Ventilation power 5 W continuously Heating power 5 W and 10 W Heater induced offset 1 W m 2 with CMP11 Pyranometer Weight without cable 1 6 kg 3 5 lb FIGURE 6 2 Dimensions of the CVF3 8 ...

Страница 17: ...r via the CM245 Mounting Stand If using a CFV3 Ventilation Unit a different mounting stand the NOTE 27084 is required Refer to Appendix A CVF3 Heater Ventilator for more information The CM245 includes slots that allow it to be adjusted to any angle from horizontal to vertical If mounting the pyranometer at an angle ensure that the crossarm is leveled horizontally before placing the bracket at its ...

Страница 18: ...RE 7 3 1 Attach the mounting stand to the crossarm 2 Loosely mount the pyranometer on the mounting stand Do not fully tighten the two mounting screws 3 Turn the leveling screws as required to bring the bubble of the level within the ring 4 Tighten the mounting screws to secure the assembly in its final position Check that the pyranometer is still correctly leveled and adjust as necessary 5 Attach ...

Страница 19: ... and a shield The additional conductors on the CMP21 s cable are for connecting its internal thermistor A schematic for the CMP6 CMP11 and the thermopile of the CMP21 is provided in Section 7 2 1 CMP6 CMP11 and CMP21 Thermopile Schematic Wiring for the CMP6 and CMP11 is described in Section 7 2 2 CMP6 and CMP11 Wiring wiring for the CMP21 is described in Section 7 2 3 CMP21 Wiring NOTE Mounting sc...

Страница 20: ... has better noise rejection than a single ended measurement Connections to Campbell Scientific dataloggers for a differential measurement are given in TABLE 7 1 A user supplied jumper wire should be connected between the low side of the differential input and ground AG or to keep the signal in common mode range Connections to Campbell Scientific dataloggers for a single ended measurement are given...

Страница 21: ...d a voltage excitation channel are used to measure the CMP21 s internal thermistor Connections to Campbell Scientific dataloggers for a differential measurement are given in TABLE 7 3 A user supplied jumper wire should be connected between the low side of the differential input and ground AG or to keep the signal in common mode range Connections to Campbell Scientific dataloggers for a single ende...

Страница 22: ...ss Sensor Manual for programming information if using a CMP6 or CMP11 with a CWS900 NOTE 7 3 1 Solar Radiation Measurements Solar radiation can be reported as an average flux density W m 2 or daily total flux density MJ m 2 The appropriate multipliers are listed in TABLE 7 5 Programming examples are given for both average and daily total solar radiation The pyranometers output a low level voltage ...

Страница 23: ...option can be used if measurement time is not critical The parameter code for the input range also specifies the measurement integration time The slow or 60 Hz rejection integration gives a more noise free reading The 250 µs CRBasic or a fast Edlog integration takes less power and allows for faster throughput 7 3 1 2 Multiplier The multiplier converts the millivolt reading to engineering units The...

Страница 24: ...em for Edlog dataloggers Example Assume that daily total flux is desired and that the Edlog datalogger scan rate is 1 second With a multiplier that converts the readings to units of kJ m 2 and an average irradiance of 0 5 kW m 2 the maximum low resolution output limit will be exceeded in less than four hours Solution 1 Change the multiplier in the instruction to m 0 001 This will totalize MJ m 2 i...

Страница 25: ... shipped with each CMP21 pyranometer In CRBasic the Steinhart Hart equation is entered as a mathematical expression Edlog dataloggers can use Instruction P200 requires a newer datalogger operating system 7 3 3 Example Programs 7 3 3 1 CR1000 Example Program for Measuring a CMP6 Although this example is for the CR1000 other CRBasic dataloggers are programmed similarly The following program measures...

Страница 26: ...ble TenMin NextScan EndProg 7 3 3 2 CR1000 Example Program for Measuring a CMP11 Although this example is for the CR1000 other CRBasic dataloggers are programmed similarly The following program measures the CMP11 every second and converts the millivolt output to W m 2 A sensor calibration of 8 55 µV W m 2 is used for the example program Every 10 minutes the program outputs the average and standard...

Страница 27: ... for the CR1000 other CRBasic dataloggers are programmed similarly The following program measures the CMP21 every second It converts the pyranometer s millivolt output to W m 2 A pyranometer calibration of 8 65 µV W m 2 is used for the example program The resistance of the internal thermistor is converted to degree Celsius and then to Kelvin Every 10 minutes the program outputs the average and sta...

Страница 28: ...e Battery Voltage and Panel Temperature PanelTemp PTemp 250 Battery Batt_Volt Measure the CMP21 pyranometer VoltDiff CMP21_Irr 1 mV25C 3 True 10000 _60Hz 1000 8 65 0 CMP21 Thermistor Measurement BrHalf Vs_Vx 1 mV5000 15 Vx1 1 2500 True 0 250 1 0 0 Rs 1000 Vs_Vx 1 Vs_Vx CMP21_T_C 1 1 0295e 3 2 391e 4 LN Rs 1 568e 7 LN Rs 3 273 15 Convert CMP21 temp to Kelvin CMP21_T_K CMP21_T_C 273 15 CallTable Ten...

Страница 29: ... Rejection Range use the50mVrange for the CR7 21Xand CR23X 3 1 DIFF Channel use the 250 mV range for the CR10X if 4 3 Loc Solar_Wm2 calibration factor is 25 µV Wm 2 5 69 7837 Multiplier 1000 14 33 6 0 Offset Set negative values to zero 2 If X F P89 1 3 X Loc Solar_Wm2 2 4 3 0 F 4 30 Then Do 3 Z F x 10 n P30 1 0 F 2 0 n Exponent of 10 3 3 Z Loc Solar_Wm2 4 End P95 Calculate units in MJ where MJ m t...

Страница 30: ...80 1 1 Final Storage Area 1 2 102 Array ID 12 Real Time P77 1 1220 Year Day Hour Minute midnight 2400 13 Resolution P78 1 1 High Resolution 14 Totalize P72 1 1 Reps 2 4 Loc Solar_MJ 15 Resolution P78 1 0 Low Resolution 8 Maintenance At regular intervals physically inspect the pyranometer to ensure that Dome is free of dirt condensation and ice see Section 8 1 Cleaning Domes Desiccant granules are ...

Страница 31: ... Ventilator In some applications the CVF3 may also reduce the deposition of dust on the pyranometer dome and therefore reduce the cleaning interval frequency The silica gel desiccant granules in the drying cartridge should be orange and opaque Replace the desiccant granules when they become translucent normally after several months Refill packs of desiccant are shipped with the pyranometer and can...

Страница 32: ... The effective sky temperature can be 30 C lower than the ground temperature which results in an infra red emission of 150 W m 2 If this happens dew glazed frost or hoar frost can be precipitated on the top of the outer dome and can stay there for several hours in the morning An ice cap on the dome is a strong diffuser and can increase the pyranometer signal by up to 50 in the first hours after su...

Страница 33: ...esistance is infinite there is a broken connection check the wiring 4 Disconnect the sensor cable and check the voltage output from the sensor With the sensor located 8 below a 60 W incandescent light bulb the voltage should be approximately 2 5 mV No voltage indicates a problem with the sensor Symptom sensor signal is unrealistically high or low 1 Check that the right calibration factor has been ...

Страница 34: ...CMP6 L CMP11 L and CMP21 L Pyranometers 26 ...

Страница 35: ... an additional 5 W of power at 12 Vdc These power requirements are large compared to most Campbell Scientific products Because of this the CVF3 should be connected to the 21326 Power Net 5 A Power Supply and the 7321 Crydom Relay The Crydom relay allows the heater power to be controlled by the datalogger program and thus reducing power consumption For example the datalogger program can turn on the...

Страница 36: ... 5 16 1 2 open end wrenches 5 32 Allen wrench Tape measure UV resistant wire ties Side cut pliers Compass Step ladder To install do the following 1 Remove leveling screws from the pyranometer 2 Fit the pyranometer in the upper plate of the CVF3 see FIGURE A 2 3 Use the counter sink screws nylon rings and nuts to secure the upper plate of the CVF3 with the lower portion of the unit see FIGURE A 2 F...

Страница 37: ...ing screws bringing the bubble of the pyranometer s level within the ring see FIGURE A 3 FIGURE A 3 CVF3 installed onsite 6 Tighten the mounting screws to secure the assembly in its final position Check that the pyranometer is still correctly leveled and adjust as necessary 7 Use the cover s screws to fasten the white cover to the pyranometer see FIGURE A 4 A 3 ...

Страница 38: ...ng Wire Color Description Connection Red Ventilator Power 12V on 21326 Power Supply Brown Ventilator Power 12V on 21326 Power Supply Blue Ventilator Ground G on 21326 Power Supply Black Ventilator Ground G on 21326 Power Supply Gray Ventilator Ground G on 21326 Power Supply Green 5 W Heater Power 12V on 21326 Power Supply White 5 W Heater Power 12V on 21326 Power Supply Clear Shield on 21326 Power...

Страница 39: ...er s maintenance 2 Inspect the area directly under the 120 mm diameter hole in the mounting plate to ensure that it is free from leaves snow or other obstructions that can inhibit air flow 3 Unclip the CVF3 s filter cover and check the filters see FIGURE A 5 4 Replace filters as needed FIGURE A 5 CVF3 filter replacement A 5 ...

Страница 40: ...Appendix A CVF3 Heater Ventilator A 6 ...

Страница 41: ......

Страница 42: ...1W7 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Centro Caribe S A CSCC 300 N Cementerio Edificio Breller Santo Domingo Heredia 40305 COSTA RICA www campbellsci cc info campbellsci cc 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 CSL France 3 A...

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