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Campbell CMP11, Instruction Manual

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Campbell CMP11 Instruction Manual Download Page 30

CMP6, CMP11, and CMP21 Pyranometers 

 

 

 

20 

Summary of Contents for CMP11

Page 1: ...INSTRUCTION MANUAL CMP6 CMP11 and CMP21 Pyranometers Revision 4 15 C o p y r i g h t 2 0 0 6 2 0 1 5 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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Page 3: ...ducts to CSI CSI will return such Products by surface carrier prepaid within the continental United States of America To all other locations CSI will return such Products best way CIP port of entry per Incoterms 2010 This warranty shall not apply to any Products which have been subjected to modification misuse neglect improper service accidents of nature or shipping damage This warranty is in lieu...

Page 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...

Page 5: ...fore beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit climbing by other persons Take reasonable precautions to secure tripod and tower sites from trespassers Use only manufacturer recommended parts materials and tools Utility and Electrical You can be ...

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Page 7: ...6 1 Pyranometers 8 6 2 CVF4 Ventilation Unit 9 7 Installation 10 7 1 Mounting to a Tripod or Tower 10 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...

Page 8: ...le for the Southern Hemisphere 4 6 1 Dimensions of the CMP6 CMP11 and CMP21 8 7 1 Exploded view of the pyranometer 11 7 2 CMP6 CMP11 and CMP21 thermopile detector schematic 12 8 1 Reading is reduced if dome is not dry or clean 17 8 2 Changing the desiccant 18 C 1 CVF4 Components top view no cover C 2 C 2 CVF4 Components bottom view C 2 C 3 CVF4 Ventilation Unit and Ships With Kit C 3 C 4 Crossarm ...

Page 9: ...pbell Scientific Dataloggers 14 7 5 Multipliers Required for Flux Density and Total Fluxes 16 B 1 CR1000 Wiring for CMP6 Example Program B 1 B 2 CR1000 Wiring for CMP11 Example Program B 2 B 3 CR1000 Wiring for CMP21 Example Program B 3 C 1 CVF4 Wiring C 7 iii ...

Page 10: ...Table of Contents iv ...

Page 11: ... AND UNDERSTAND the Precautions section at the front of this manual 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 applications engineer 3 Initial Inspection Check the contents of the s...

Page 12: ...urface Site the pyranometer to allow easy access for maintenance while ideally avoiding any obstructions or reflections above the plane of the sensing element It is important to mount the pyranometer such that a shadow or reflection will not be cast on it at any time If this is not possible try to choose a site where any obstruction over the azimuth range between earliest sunrise and latest sunset...

Page 13: ...CMP6 CMP11 and CMP21 Pyranometers FIGURE 4 1 Pyranometer installation FIGURE 4 2 Pyranometer mounted horizontally for the Northern Hemisphere left and Southern Hemisphere right CM2XX Series Crossarm 3 ...

Page 14: ...CMP6 CMP11 and CMP21 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 ...

Page 15: ...yranometer and assign datalogger wiring terminals Use the following procedure to get started 1 Install Short Cut by clicking on the install file icon Get the install file from either www campbellsci com the ResourceDVD or find it in installations of LoggerNet PC200W PC400 or RTDAQ software 2 The Short Cut installation should place a Short Cut icon on the desktop of your computer To open Short Cut ...

Page 16: ...tion folder Select CMP3 CMP6 CMP11 Pyranometer Click to move the selection to the Selected device window Default units are kW m2 for flux density units and kJ m2 for total flux These can be changed by clicking the Flux Density and Total Flux boxes and selecting different values A sensitivity value needs to be entered This value is unique to each sensor and is listed on the calibration sheet that i...

Page 17: ...ected to the datalogger as shown in the wiring diagram in step 6 check the output of the sensor in the datalogger support software data display to make sure it is making reasonable measurements 5 Overview 5 1 Models CMP series models differ in accuracy and performance see Section 6 Specifications p 8 The CMP21 also includes an internal thermistor allowing individually optimized compensation of the...

Page 18: ... 180 degrees and the angular characteristics needed to fulfill the cosine response requirements 6 Specifications Features Double glass dome Integrated bubble level is visible without removing sun shield Measures reflected solar radiation when inverted Desiccant filled drying cartridge prevents dew from forming on the inner sides of the domes Provides measurements in direct sunlight under plant can...

Page 19: ...vel 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 cable 0 9 kg 2 lb with 10 m 33 ft cable Impedance 20 to 200 Ω 10 to 100 Ω Impedance is defined as the total electrical impeda...

Page 20: ...rizontally without using a leveling base They typically mount to a crossarm via the CM255 or CM255LS Mounting Stand The CM255 and CM255LS are not compatible with a pyranometer housed in a CVF4 Ventilation Unit The CVF4 mounts to a tripod or tower using the 31153 mounting stand and either the CM220 Right Angle Mount or the 17953 1 inch by 1 inch NU RAIL Refer to Appendix C CVF4 Ventilation Unit p C...

Page 21: ...meter 7 2 Wiring To wire an Edlog datalogger see an older manual at www campbellsci com old manuals or contact a Campbell Scientific application engineer for assistance The cable of the CMP6 and CMP11 has two conductors and a shield The cable of the CMP21 has five conductors and a shield The additional conductors on the CMP21 s cable are for connecting its internal thermistor A schematic for the C...

Page 22: ...ended because it 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 measu...

Page 23: ...ed A single ended channel and 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 to keep the signal in common mode range Connections to Campbell Scientific datalog...

Page 24: ...ram or add to an existing custom program Short Cut cannot edit programs after they are imported and edited in CRBasic Editor A Short Cut tutorial is available in Section 4 Quickstart p 2 If you wish to import Short Cut code into CRBasic Editor to create or add to a customized program follow the procedure in Appendix A Importing Short Cut Code Into CRBasic Editor p A 1 Programming basics for CRBasi...

Page 25: ... maximum expected input voltage Normally the 50 mV range for the CR3000 CR5000 or CR9000 X and the 25 mV or 250 mV range for the CR6 CR800 CR850 or CR1000 will be suitable The exact range will depend on the sensitivity of your individual sensor and the maximum expected reading With some dataloggers an autorange option can be used if measurement time is not critical The parameter code for the input...

Page 26: ... offset Some users may wish to remove small negative readings by including code after the measurement instructions that sets negative readings to zero 7 3 1 4 Output Format Considerations Over ranging may be an issue if the measurement values are totalized Over ranging can be prevented when using CRBasic by storing the data in the IEEE4 format 7 3 2 CMP21 Internal Thermistor Measurement The thermi...

Page 27: ... secure Pyranometer is level if mounted horizontally Cables are in good condition 8 1 1 Cleaning Domes Clean the outer dome at regular intervals e g every week or so Remove any accumulated dust condensation or ice from the dome and pyranometer body using a soft cloth dampened with water or alcohol see FIGURE 8 1 FIGURE 8 1 Reading is reduced if dome is not dry or clean 8 1 2 Changing the Desiccant...

Page 28: ... into the pyranometer s body FIGURE 8 2 Changing the desiccant 8 1 3 Check Sensor Output It is also important to check the data returned from the sensor as it will show the first indication of a fault When doing this you should be aware of several expected phenomena that can cause strange measurements In particular on clear windless nights the outer dome temperature of horizontally placed pyranome...

Page 29: ...a short circuit check the wiring Resistances somewhat lower than expected could be due to water ingress into the sensor or enclosure connectors If the resistance 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 inches below a 60 W incandescent light bulb the voltage should be approximately...

Page 30: ...CMP6 CMP11 and CMP21 Pyranometers 20 ...

Page 31: ...CRBasic Editor CR6 CR200 X CR1000 CR800 CR3000 CR5000 dataloggers 1 Create the Short Cut program following the procedure in Section 4 Quickstart p 2 Finish the program and exit Short Cut Make note of the file name used when saving the Short Cut program 2 Open CRBasic Editor 3 Click File Open Assuming the default paths were used when Short Cut was installed navigate to C CampbellSci SCWin folder Th...

Page 32: ...file Copy and paste the section beginning with heading Wiring for CRXXX into the CRBasic program usually at the head of the file After pasting edit the information such that a character single quotation mark begins each line This character instructs the datalogger compiler to ignore the line when compiling the datalogger code A 2 ...

Page 33: ...ents Wiring for this example is given in TABLE B 1 TABLE B 1 CR1000 Wiring for CMP6 Example Program Wire Color Description CR1000 Jumper White Solar Signal 1H Black Solar Signal 1L Clear Shield Jumper 1L to with user supplied 26 AWG or larger wire CR1000 Series Datalogger Public PTemp Public Batt_Volt Public CMP6_Irr Units CMP6_Irr W m2 DataTable TenMin 1 1 DataInterval 0 1 Min 4 Minimum 1 Batt_Vo...

Page 34: ... 2 TABLE B 2 CR1000 Wiring for CMP11 Example Program Wire Color Description CR1000 Jumper White Solar Signal 2H Black Solar Signal 2L Clear Shield Jumper 2L to with user supplied 26 AWG or larger wire CR1000 Series Datalogger Public PTemp Public Batt_Volt Public CMP11_Irr Units CMP11_Irr W m2 DataTable TenMin 1 1 DataInterval 0 1 Min 4 Minimum 1 Batt_Volt FP2 0 False Sample 1 PTemp FP2 Average 1 C...

Page 35: ...le is given in TABLE B 3 TABLE B 3 CR1000 Wiring for CMP21 Example Program Wire Color Description CR1000 Jumper White Solar Signal 3H Blue Solar Signal 3L Yellow Voltage Excitation VX1 Black Temp Signal 15 SE Brown Signal Reference Clear Shield Jumper 3L to with user supplied 26 AWG or larger wire CR1000 Series Datalogger Public PTemp Public Batt_Volt Public CMP21_Irr Public CMP21_T_C Public CMP21...

Page 36: ...P21 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 TenMin NextScan EndProg B 4 ...

Page 37: ...er is needed to melt frost and snow compared to older ventilation units CVF4 is designed to be used with Kipp Zonen s CMP SMP pyranometers CGR 4 pyrgeometer CUV 5 total UV radiometer CVF4 can be mounted on the 2AP and SOLYS 2 sun trackers CVF4 replaces the successful and widely used CVF3 ventilation unit The CVF4 is meant to run continuously The heater can either be switched on permanently for col...

Page 38: ...omponents top view no cover FIGURE C 2 CVF4 Components bottom view Heater Ventilator Cover Nut Pyranometer Mounting Holes Heater CVF4 Cable Connector Pyranometer Cable Slot Cover Nut Connector Box Mounting Feet Cover Nut Mounting Feet Filter Cover C 2 ...

Page 39: ...ounting hardware The CVF4 is mounted to a crossarm using the 31153 mount and either the CM220 Right Angle Mounting Bracket or the 17953 1 inch by 1 inch NU RAIL Refer to the Kipp Zonen Instruction Manual if mounting the CVF4 to a SOLYS 2 Solar Tracker or to a CM 121C Shadow Ring Tools required for mounting to a tripod or tower are Small and medium Phillips screwdrivers 5 16 inch 1 2 inch open end ...

Page 40: ...ngle Mounting Bracket FIGURE C 5 or a 17953 1 in by 1 in NU RAIL FIGURE C 4 to the crossarm FIGURE C 5 CM220 Right Angle Mounting Bracket attached to CM200 series crossarm U bolt Washers CM210 Bracket included with crossarm U bolt Nuts 17953 NU RAIL CM200 series Crossarm U bolts CM220 Right Angle Bracket U bolt for Attaching the 31153 Mounting Stand U bolt for Attaching the Crossarm CM200 Series C...

Page 41: ...es 4 Fasten the CVF4 s feet to the 31153 using the supplied washers and screws FIGURE C 6 FIGURE C 6 Mounting CVF4 feet to a mounting stand 5 Loosely mount the pyranometer on the CVF4 using the mounting screws and washers Do not fully tighten the pyranometer s two mounting screws FIGURE C 7 FIGURE C 7 Mounting the pyranometer to the CVF4 Pyranometer Mounting Screw Nylon Washer Level Cable Notch C ...

Page 42: ...ctly leveled and adjust as necessary 8 Route the pyranometer s cable through the cable notch 9 Fit the white cover onto the CVF4 and secure it with the cover nuts see FIGURE C 8 FIGURE C 8 CVF4 Mounted to 31153 Stand pyranometer not shown 10 Attach the power cable to the CVF4 connector 11 Route the cables along the underside of the crossarm to the tower tripod mast and to the instrument enclosure ...

Page 43: ...ion about wiring the pyranometer TABLE C 1 CVF4 Wiring Wire Color Description Connection Brown Ventilator Power 12V on Power Supply Blue Heater Power 12V on Power Supply Black Power Ground G on Power Supply White Tachometer Signal Datalogger pulse channel or control port Clear Shield on datalogger C 4 1 Implementation Example C 7 ...

Page 44: ... Data Tables DataTable Ten_Min 1 1 DataInterval 0 10 Min 10 Minimum 1 batt_volt FP2 0 False Sample 1 PTemp FP2 Average 1 GH_Irradiance_CMP11 FP2 False StdDev 1 GH_Irradiance_CMP11 FP2 False Average 1 CVF4_Tach FP2 False EndTable Main Program BeginProg Scan 1 Sec 0 0 PanelTemp PTemp 250 Measure wire panel temperature Battery batt_volt Measure battery voltage Retrieve the current time for use in the...

Page 45: ... it is free from leaves snow or other obstructions that can inhibit air flow 3 Regularly inspect the fan inlet by unclipping the cover For optimal air flow make sure the diagonal line on the filter cover is in line with the diagonal line on the ventilator FIGURE C 9 The filter cover clicks back on the ventilator 4 Clean or replace filters typically every 6 months The filters may need to be cleaned...

Page 46: ...Appendix C CVF4 Ventilation Unit FIGURE C 9 CVF4 filter replacement pn 31435 Ventilator Diagonal Line Cover Diagonal Line Filter Filter Cover C 10 ...

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Page 48: ...om br Campbell Scientific Canada Corp CSC 14532 131 Avenue NW Edmonton AB T5L 4X4 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 ca...

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