HMP60 Temperature and Relative Humidity Probe
Contents
1. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION USE OR MAINTENANCE OF TRIPODS TOWERS OR ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS CROSSARMS ENCLOSURES ANTENNAS ETC Contents PDF viewers These page numbers refer to the printed version of this document Use the PDF reader bookmarks tab for links to specific sections An Introduction rra 1 2 Cautionary Statements 1 3 Initial Inspeection 22 ea 1 A QUICK Cir m ai 2 O ira 4 6 Specifications a ee 4 6 1 Temperature Sensor iii iene la ppm ep eerte 5 6 2 Relative Humidity Sensor essere 5 7 Installation 5 7 1 Wiring to Datalogger co nono eene 5 7 20 Datalogger Programming iii 6 7 2 1 VoltSEO Instruction antis eR 6 7 3 ES EE 7 7 3 1 Installation in a 41303 5A or 41303 5B 6 Plate Shield 8 7 3 2 Installation in a RADOG 6 Plate Shield or RADIO 10 Plate Shield O ooo 8 1337 Mount the Shield unrre p eet UR 8 8 Operation iie dd 9 8 1 Measurement Rainer prece hai 9 8 2 Long Lead Lengths eese nennen 9 9 Troubleshooting and Maintenance 10 9 1 Troubleshooting Js hee ie err eei e epi ens 10 9 2 Maintenance ener eee te entes 10 9 2 1 Procedure for Removing RH2. CR1000 CR800 CR3000 or CR5000 dataloggers respectively Select the file and click Open Immediately save the file in a folder different from Campbellsci SCWin or save the file with a different file name Once the file is edited with CRBasic Editor Short Cut can no longer be used to edit the datalogger program Change the name of the program file or move it or Short Cut may overwrite it next time it is used 9 6 The program can now be edited saved and sent to the datalogger Import wiring information to the program by opening the associated DEF 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 Appendix A Importing Short Cut Code to CRBasic Editor Appendix B Example Program This example can be used directly with CR800 series and CR1000 dataloggers and can be modified for use with CR6 CR3000 and CR5000 dataloggers Program measures the HMP60 probe once every 5 seconds and stores the average temperature and a sample of the relative humidity every 60 minutes Wiring Diagram HMP60 Wire CR1000 Colour Function Terminal Black Temperature signal SE1 White Relative Humidity signal SE2 Brown Power 12V Blue
3. Signal amp Power Reference G Clear Shield Ground Symbol Public AirTC Public RH DataTable Temp_RH True 1 DataInterval 0 60 Min 0 Average 1 AirTC FP2 False Sample 1 RH FP2 EndTable BeginProg Scan 5 Sec 1 0 PortSet 9 1 Turn on switched 12V Delay 0 3 Sec 3 second delay HMP50 HMP60 Temperature amp Relative Humidity Sensor measurements AirTC and RH VoltSe AirTC 1 mV2500 1 0 0 60Hz 0 1 40 VoltSE RH 1 mV2500 2 0 0 60Hz 0 1 0 If RH gt 100 AND RH 108 Then RH 100 CallTable Temp RH NextScan EndProg Appendix C Absolute Humidity The HMP60 measures the relative humidity Relative humidity is defined by the equation below RH x 100 C 1 S where RH is the relative humidity e is the vapour pressure in kPa and e is the saturation vapour pressure in kPa The vapour pressure e is an absolute measure of the amount of water vapour in the air and is related to the dew point temperature The saturation vapour pressure is the maximum amount of water vapour that air can hold at a given air temperature The relationship between dew point and vapour pressure and air temperature and saturation vapour pressure are given by Goff and Gratch 1946 Lowe 1977 and Weiss 1977 When the air temperature increases so does the saturation vapour pressure Conversely a decrease in air temperature causes a corresponding decrease in saturation vapour pressure It follows then from Eq C 1 that a change in air temp
4. be a voltage drop along this lead because the wire itself has resistance The HMP60 draws approximately 2 mA when it is powered The wire used in the HMP60 pn 18159 has resistance of 26 2 Q 1000 feet Using Ohm s law the voltage drop V along the signal reference power ground lead is given by Eq 1 V 1XR 2 mA x 26 20 1000 ft 1 52 4 mV 1000 ft This voltage drop will raise the apparent temperature and relative humidity because the difference between the signal and signal reference at the datalogger has increased by Vi 9 Troubleshooting and Maintenance 10 NOTE All factory repairs and recalibrations require a returned material authorization RMA and completion of the Declaration of Hazardous Material and Decontamination form Refer to the Assistance page at the beginning of this manual for more information Troubleshooting Symptom Relative Humidity is reported as NAN 9999 or 0 1 Check that the sensor is wired to the correct analogue input channels as specified by the measurement instructions 2 Verify the voltage range code for the single ended measurement instruction is correct for the datalogger type Symptom Incorrect temperature or relative humidity 1 Verify the multiplier and offset parameters are correct for the desired units see Section 7 2 1 VoltSE Instruction p 6 9 2 Maintenance Check the radiation shield monthly to make sure it is free from dust and debris To c
5. connect the blue wire to the datalogger first followed by the black white and clear wires Connect the brown HMP60 Temperature and Relative Humidity Probe Table 7 1 Wire Colour Function and Datalogger Connection Wire Colour Wire Function Datalogger Connection Terminal U configured for Black Temperature signal single ended analogue input SE single ended analogue voltage input White Relative humidity U configured for signal single ended analogue input SE Blue Power ground and G signal reference Brown Power 12V Clear EMF Shield 7 analogue ground U channels are automatically configured by the measurement instruction 7 2 Datalogger Programming NOTE Short Cut is the best source for up to date datalogger programming code Programming code is needed e when creating a program for a new datalogger installation e when adding sensors to an existing datalogger program If your data acquisition requirements are simple you can probably create and maintain a datalogger program exclusively with Short Cut If your data acquisition needs are more complex the files that Short Cut creates are a great source for programming code to start a new program 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 CRB
6. damage or cut the cable jacket If damage to the cable is suspected consult with a Campbell Scientific application engineer e Although rugged the HMP60 should be handled as a precision scientific instrument e Remove the yellow cap prior to installation e Santoprene rubber which composes the black outer jacket of the 107 cable will support combustion in air It is used because of its resistance to temperature extremes moisture and UV degradation It is rated as slow burning when tested according to U L 94 H B and passes FMVSS302 However local fire codes may preclude its use inside buildings 3 Initial Inspection e Check the packaging and contents of the shipment If damage occurred during transport immediately file a claim with the carrier Contact Campbell Scientific to facilitate repair or replacement e Check model information against the shipping documents to ensure the expected products and the correct lengths of cable are received Model numbers are found on each product On cables and cabled items the model number is usually found at the connection end of the cable Report any shortages immediately to Campbell Scientific e The HMP60 ships with a ResourceDVD HMP60 Temperature and Relative Humidity Probe 4 Quickstart Short Cut is an easy way to program your datalogger to measure the HMP60 sensor and assign datalogger wiring terminals Use the following procedure to get started 1 Install Short Cut by c
7. the product or used during the products life should be removed from the product and also be sent to an appropriate recycling facility Campbell Scientific Ltd can advise on the recycling of the equipment and in some cases BEES arrange collection and the correct disposal of it although charges may apply for some items or territories For further advice or support please contact Campbell Scientific Ltd or your local agent CAMPBELL E SCIENTIFIC Campbell Scientific Ltd 80 Hathern Road Shepshed Loughborough LE12 9GX UK Tel 44 0 1509 601141 Fax 44 0 1509 601091 Email support campbellsci co uk www campbellsci co uk Precautions DANGER MANY HAZARDS ARE ASSOCIATED WITH INSTALLING USING MAINTAINING AND WORKING ON OR AROUND TRIPODS TOWERS AND ANY ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS CROSSARMS ENCLOSURES ANTENNAS ETC FAILURE TO PROPERLY AND COMPLETELY ASSEMBLE INSTALL OPERATE USE AND MAINTAIN TRIPODS TOWERS AND ATTACHMENTS AND FAILURE TO HEED WARNINGS INCREASES THE RISK OF DEATH ACCIDENT SERIOUS INJURY PROPERTY DAMAGE AND PRODUCT FAILURE TAKE ALL REASONABLE PRECAUTIONS TO AVOID THESE HAZARDS CHECK WITH YOUR ORGANIZATION S SAFETY COORDINATOR OR POLICY FOR PROCEDURES AND REQUIRED PROTECTIVE EQUIPMENT PRIOR TO PERFORMING ANY WORK Use tripods towers and attachments to tripods and towers only for purposes for which they are designed Do not exceed design limits Be familiar and comply
8. with all instructions provided in product manuals Manuals are available at www campbellsci eu or by telephoning 44 0 1509 828 888 UK You are responsible for conformance with governing codes and regulations including safety regulations and the integrity and location of structures or land to which towers tripods and any attachments are attached Installation sites should be evaluated and approved by a qualified engineer If questions or concerns arise regarding installation use or maintenance of tripods towers attachments or electrical connections consult with a licensed and qualified engineer or electrician General e Prior to performing site or installation work obtain required approvals and permits Comply with all governing structure height regulations such as those of the FAA in the USA e Use only qualified personnel for installation use and maintenance of tripods and towers and any attachments to tripods and towers The use of licensed and qualified contractors is highly recommended e Read all applicable instructions carefully and understand procedures thoroughly before beginning work e Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers e 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 e Use only manufacturer recommended parts materia
9. 36 WMO 2008 Guide to Meteorological Instruments and Methods of Observation World Meteorological Organization No 8 7th edition Geneva Switzerland Many of the manuals also include siting information for relative humidity and temperature sensors 12 Appendix A Importing Short Cut Code to CRBasic Editor This tutorial shows NOTE e How to import a Short Cut program into a program editor for additional refinement e How to import a wiring diagram from Short Cut into the comments of a custom program Short Cut creates files that can be imported into CRBasic Editor These files normally reside in the C campbellsci SCWin folder and have the following extensions DEF wiring and memory usage information CR6 CR6 datalogger code CR2 CR200 X datalogger code CR1 CR1000 datalogger code CR8 CR800 datalogger code CR3 CR3000 datalogger code CR5 CR5000 datalogger code Use the following procedure to import Short Cut code into CRBasic Editor 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 Open CRBasic Editor Click File Open Assuming the default paths were used when Short Cut was installed navigate to C CampbellSci SCWin folder The file of interest has a CRO CR2 CRI CR8 CR3 or CR5 extension for CR6 CR200 X
10. Chip eese 11 10 Attributions and References 11 Appendices A Importing Short Cut Code to CRBasic Editor A 1 B Example Program B 1 C Absolute Humidity ooo C 1 C 1 CR1000 Vapour Pressure Example eee C 1 Figures Tables 7 1 FIMP60 as shipped s scccscisees sscesterisi sees caps senie apebstbugsdbessceeent eee 8 HMP60 and 41303 5A Radiation Shield een 8 HMP60 and 41303 5A Radiation Shield on a tripod mast left and on a CM202 Crossarm right eese 9 HMP60 and RADO6 Radiation Shield on a tripod mast 9 Exploded view of HMP60 as shipped sss 11 Wire Colour Function and Datalogger Connection 6 HMP60 Temperature and Relative Humidity Probe 1 Introduction The HMP60 probe measures temperature for the range of 40 to 60 C and relative humidity for the range of 0 to 100 RH It is suitable for long term unattended monitoring and is compatible with all Campbell Scientific dataloggers For Edlog datalogger support check the availability of an older manual at www campbellsci com old manuals or contact a Campbell Scientific application engineer for assistance 2 Cautionary Statements e READ AND UNDERSTAND the Precautions section at the front of this manual e When opening the shipping package do not
11. IVANVIA YAS E CAMPBELL E SCIENTIFIC WHEN MEASUREMENTS MATTER HMP60 Temperature and Relative Humidity Probe t N P 3 gt o Issued 11 8 15 Copyright 1995 2015 Campbell Scientific Inc Printed under licence by Campbell Scientific Ltd CSL 896 Guarantee This equipment is guaranteed against defects in materials and workmanship This guarantee applies for 24 months from date of delivery We will repair or replace products which prove to be defective during the guarantee period provided they are returned to us prepaid The guarantee will not apply to e Equipment which has been modified or altered in any way without the written permission of Campbell Scientific e Batteries e Any product which has been subjected to misuse neglect acts of God or damage in transit Campbell Scientific will return guaranteed equipment by surface carrier prepaid Campbell Scientific will not reimburse the claimant for costs incurred in removing and or reinstalling equipment This guarantee and the Company s obligation thereunder is in lieu of all other guarantees expressed or implied including those of suitability and fitness for a particular purpose Campbell Scientific is not liable for consequential damage Please inform us before returning equipment and obtain a Repair Reference Number whether the repair is under guarantee or not Please state the faults as clearly as possible and if the product is out of the guarantee per
12. Progress 1 New Open CR1000 Wiring Diagram for untitled scw Wiring details can be found in the help file 2 Datalogger PU HMP50 HMP60 AirTC RH CR1000 4 Outputs 5 Finish Black White iL Brown i2v Blue G Wiring Clear xL Groun Wiring Diagram ea Wiring Text 4 Previous Next Finish 7 Select any other sensors you have and then finish the remaining Short Cut steps to complete the program The remaining steps are outlined in Short Cut Help which is accessed by clicking on Help Contents Programming Steps 8 If LoggerNet PC400 RTDAQ or PC200W is running on your PC and the PC to datalogger connection is active you can click Finish in Short Cut and you will be prompted to send the program just created to the datalogger 9 Ifthe sensor is connected 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 The HMP60 Temperature and Relative Humidity probe contains a Platinum Resistance Temperature detector PRT and a Vaisala INTERCAP capacitive relative humidity sensor It is suitable for long term unattended monitoring The humidity chip is field replaceable eliminating recalibration downtime 6 Specifications Features e Field replaceable humidity chip eliminates recalibration down time e Compatible with the CWS900 series interf
13. aces allowing it to be used in a wireless sensor network e Compatible with the following CRBasic dataloggers CR200 X series CR6 CR800 series CR1000 CR3000 CR5000 CR9000 X Operating Temperature 40 to 60 C Probe Length 7 1 cm 2 8 in Probe Body Diameter 1 2 cm 0 47 in 7 Filter Filter Diameter Housing Body Material Filter Cap Material Classification Power Consumption Supply Voltage Settling Time after power is switched on Output Signal Range 6 1 Temperature Sensor Sensor Temperature Measurement Range Temperature Accuracy 6 2 Relative Humidity Sensor Sensor Relative Humidity Measurement Range Accuracy from 0 to 40 C Accuracy from 40 to 0 C and 40 to 60 C Installation User Manual 0 2 um Teflon membrane 1 2 cm 0 47 in AISI 316 stainless steel Chrome coated ABS plastic IP65 1 mA typical 5 mA maximum 5 to 28 Vdc ls 0 to 1 Vdc 1000 Q PRT DIN 43760B 40 to 60 C 0 6 C 40 to 60 C INTERCAP 0 to 100 non condensing 3 RH over 0 to 90 5 RH over 90 to 100 5 RH over 0 to 90 7 RH over 90 to 100 If you are programming your datalogger with Short Cut skip Section 7 1 Wiring to Datalogger p 5 and Section 7 2 Datalogger Programming p 6 Short Cut does this work for you See Section 4 Quickstart p 2 for a Short Cut tutorial 7 1 Wiringto Datalogger CAUTION power wire last Always
14. asic Editor to create or add to a customized program follow the procedure in Appendix A Importing Short Cut Code to CRBasic Editor p A 1 Programming basics for CRBasic dataloggers are provided in the following sections Complete program examples for select dataloggers can be found in Appendix B Example Program B 1 7 2 1 VoltSE Instruction CRBasic dataloggers CR200 X CR6 and CR800 series CR1000 CR3000 and CR5000 measure the temperature and relative humidity signals from the HMP60 using VoltSE measurement instructions The probe output scale is 0 to 1000 millivolts for the temperature range of 40 to 60 C and for the relative humidity range of 0 to 100 VoltSE Dest Reps Range SEChan MeasOff SettlingTime Integ FNotch Mult Offset 7 3 User Manual Variations e Temperature reported as C set Mult to 0 1 and Offset to 40 e Temperature reported as F set Mult to 18 and Offset to 40 e Humidity reported as a percent set Mult to 0 1 and Offset to 0 e Humidity reported as a fraction set Mult to 0 001 and Offset to 0 Installation Locate the sensor over an open level area at least 9 m EPA in diameter The surface should be covered by short grass or the natural earth surface where grass does not grow Sensors should be located at a distance of at least four times the height of any nearby obstruction and at least 30 m EPA from large paved areas Sensors should be protected from
15. d handle the RH chip with care 3 Rinse the RH chip or dispose of the old RH chip 4 Hold the sides of the rinsed or new chip and plug it in 5 Screw on the protective cap 10 Attributions and References Santoprene is a registered trademark of Exxon Mobile Corporation AASC 1985 The State Climatologist 1985 Publication of the American Association of State Climatologists Heights and Exposure Standards for Sensors on Automated Weather Stations v 9 No 4 October 1985 www stateclimate org publications state climatologist NOAA NCY SCBOOKS SC77097 00000029 pdf 11 HMP60 Temperature and Relative Humidity Probe EPA 2008 Quality Assurance Handbook for Air Pollution Measurement Systems Vol IV Meteorological Measurements Ver 2 0 EPA 454 B 08 002 revised 2008 Office of Air Quality Planning and Standards Research Triangle Park NC 27711 Goff J A and S Gratch 1946 Low pressure properties of water from 160 to 212 F Trans Amer Soc Heat Vent Eng 51 125 164 Lowe P R 1977 An approximating polynomial for the computation of saturation vapour pressure J Appl Meteor 16 100 103 Meyer S J and K G Hubbard 1992 Nonfederal Automated Weather Stations and Networks in the United States and Canada A Preliminary Survey Bulletin Am Meteor Soc 73 No 4 449 457 Weiss A 1977 Algorithms for the calculation of moist air properties on a hand calculator Amer Soc Ag Eng 20 1133 11
16. e in degrees Celsius RH is the program variable that contains the value for the relative humidity sensor The relative humidity measurement must be in percent of RH C 1 Appendix C Absolute Humidity Wiring Diagram CR1000 Function Terminal Temperature signal Relative Humidity signal Power 12V Signal amp Power Reference Ground Symbol AirTC Public RH Public VP DataTable Table1 True 1 DataInterval 0 60 Min 0 Average 1 AirTC FP2 0 Sample 1 RH FP2 Average 1 VP FP2 0 EndTable BeginProg Scan 5 Sec 1 0 HMP60 Temperature Relative Humidity Sensor measurements AirTC and RH VoltSE AirTC 1 mV2500 1 0 0 60Hz 0 1 40 0 VoltSE RH 1 mV2500 2 0 0 60Hz 0 1 0 If RH 100 AND RH 108 Then RH 100 VapourPressure VP AirTC RH CallTable Table1 NextScan EndProg CAMPBELL SCIENTIFIC COMPANIES Campbell Scientific Inc CSI 815 West 1800 North Logan Utah 84321 UNITED STATES www campbellsci com e info campbellsci com Campbell Scientific Africa Pty Ltd CSAf PO Box 2450 Somerset West 7129 SOUTH AFRICA www csafrica co za e salesOcsafrica co za Campbell Scientific Australia Pty Ltd CSA PO Box 8108 Garbutt Post Shop QLD 4814 AUSTRALIA www campbellsci com au e info campbellsci com au Campbell Scientific do Brazil Ltda CSB Rua Apinag s nbr 2018 Perdizes CEP 01258 00 S o Paulo SP BRAZIL www campbellsci com br e vendas 2campbellsci com br Campbell Scientific Ca
17. erature will change the relative humidity without causing a change in absolute humidity For example for an air temperature of 20 C and a vapour pressure of 1 17 kPa the saturation vapour pressure is 2 34 kPa and the relative humidity is 5096 If the air temperature is increased by 5 C and no moisture is added or removed from the air the saturation vapour pressure increases to 3 17 kPa and the relative humidity decreases to 36 9 After the increase in air temperature there is more energy available to vaporize the water However the actual amount of water vapour in the air has not changed Thus the amount of water vapour in the air relative to saturation has decreased Because of the inverse relationship between relative humidity and air temperature finding the mean relative humidity is meaningless A more useful quantity is the mean vapour pressure The mean vapour pressure can be computed on line by the datalogger CRBasic dataloggers use the VapourPressure instruction to calculate vapour pressure from temperature and relative humidity measurements see Appendix C 1 CR1000 Vapour Pressure Example p C 1 C 1 CR1000 Vapour Pressure Example The VapourPressure instruction has the following syntax VapourPressure Dest Temp RH Where Dest is the variable in which the results of the instruction will be stored Temp is the program variable that contains the value for the temperature sensor The temperature measurement must b
18. idity Sensor Click to move the selection to the Selected device window Data defaults to degree Celsius This can be changed by clicking the Deg C box and selecting Deg F for degrees Fahrenheit or K for Kelvin Short Cut CR1000 C Campbellsci SCWin untitled scw Scan Interval 5 0000 Seconds 0 File Program Tools Help Available Sensors and Devices Selected Progress J Barometric Pressure a Sensor Measurement 1 New Open gt a 4 CR1000 2 Datalogger NE Span gt i Present Weather 4 Default Barty 3 Sensors 4 y Relative Humidity amp Tempe PTemp C 4 Outputs L 083E Temperature and f 5 Finish L CS205 Fuel Temperature Q CS210 10162 Enclosur Q CS215 Temperature amp R Wiring L CS500 Temperature amp R gt Wiring Diagram CS505 Fuel Moisture Se CS506 Fuel b HC2S3 Tem Wiring Text Properties Wiring Temperature AirTC DegC v Relative Humidity RH HMP50 HMP60 Temperature and Relative Humidity Sensor Units for Air Temperature Deg C Deg F K Units for Relative Humidity 96 Da Cancel Help Next gt Finish Help lt Previous HMP60 Temperature and Relative Humidity Probe 6 After selecting the sensor click at the left of the screen on Wiring Diagram to see how the sensor is to be wired to the datalogger The wiring diagram can be printed out now or after more sensors are added File Program Tools Help CR1000
19. iod it should be accompanied by a purchase order Quotations for repairs can be given on request It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment in support of this policy a Declaration of Hazardous Material and Decontamination form will be issued for completion When returning equipment the Repair Reference Number must be clearly marked on the outside of the package Complete the Declaration of Hazardous Material and Decontamination form and ensure a completed copy is returned with your goods Please note your Repair may not be processed if you do not include a copy of this form and Campbell Scientific Ltd reserves the right to return goods at the customers expense Note that goods sent air freight are subject to Customs clearance fees which Campbell Scientific will charge to customers In many cases these charges are greater than the cost of the repair x CAMPBELL SCIENTIFIC Campbell Scientific Ltd 80 Hathern Road Shepshed Loughborough LE12 9GX UK Tel 44 0 1509 601141 Fax 44 0 1509 601091 Email support campbellsci co uk www campbellsci co uk PLEASE READ FIRST About this manual Mass Please note that this manual was originally produced by Campbell Scientific Inc primarily for the North American market Some spellings weights and measures may reflect this origin Some useful conversion factors Area 1 in square inch 645
20. le to the mounting structure using cable ties CAUTION Failure to secure the cable can lead to breakage of the wires due to fatigue caused by blowing back and forth in the wind User Manual Figure 7 3 HMP60 and 41303 5A Radiation Shield on a tripod mast left and on a CM202 Crossarm right Figure 7 4 HMP60 and RADO6 Radiation Shield on a tripod mast 8 Operation 8 1 Measurement The HMP60 Temperature and Relative Humidity Probe uses a Platinum Resistance Temperature detector PRT and a Vaisala INTERCAP capacitive relative humidity sensor 8 2 Long Lead Lengths Long lead lengths cause errors in the measured temperature and relative humidity The approximate error in temperature and relative humidity is 0 52 C and 0 52 per 100 feet of cable length respectively When long lead lengths are required and the above errors in temperature and relative humidity are unacceptable use the HC2S3 or HMP155A temperature and humidity probe HMP60 Temperature and Relative Humidity Probe Understanding the following details are not required for the general operation of the HMP60 with Campbell Scientific s dataloggers The signal reference and the power ground black are the same lead in the HMP60 When the HMP60 temperature and relative humidity are measured both the signal reference and power ground are connected to ground at the datalogger The signal reference power ground lead serves as the return path for 12 V There will
21. lean the shield first remove the sensor Dismount the shield Brush all loose dirt off If more effort is needed use warm soapy water and a soft cloth or brush to thoroughly clean the shield Allow the shield to dry before remounting The white screen at the tip of the HMP60 should also be checked for contaminants When installed in close proximity to the ocean or other bodies of salt water e g Great Salt Lake a coating of salt mostly NaCl may build up on the radiation shield sensor filter and even the chip NaCl has an affinity for water The humidity over a saturated NaCl solution is 75 A build up of salt on the filter or chip will delay or destroy the response to atmospheric humidity User Manual The filter can be rinsed gently in distilled water If necessary the chip can be removed and rinsed as well see Figure 9 1 and Section 9 2 1 Procedure for Removing RH Chip 11 Do not scratch the silver chip while cleaning It might be necessary to repeat rinsing Protective Cap and Filter Shipping Cap remove prior to installation 9598 RH Chip Figure 9 1 Exploded view of HMP60 as shipped The offset and gain on the HMP60 electronics cannot be adjusted as part of a recalibration Replace the RH chip as needed 9 2 1 Procedure for Removing RH Chip 1 Unscrew the protective cap 2 Hold the plastic sides of the RH chip and unplug it CAUTION To prevent scratching avoid touching the silver RH chip an
22. licking 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 RTDAO software 2 The Short Cut installation should place a shortcut icon on the desktop of your computer To open Short Cut click on this icon Do 3 When Short Cut opens select New Program File Program Tools Help Progress Welcome to Short Cut Short Cut will 1 New Open help you generate a datalogger program The basic steps are 1 Create New Open Program 2 Select Datalogger 3 Select Sensors 4 Select Outputs 5 Finish Compile the Program Click Open Program to open an Open Program existing Short Cut program Previous ex Finish User Manual 4 Select Datalogger Model and Scan Interval default of 5 seconds is OK for most applications Click Next 5 Eile Program Tools Progress 1 New Open 2 Datalogger 3 Sensors Outputs Finish Datalogger Model SE CR1000 Scan Interval 5 Seconds Select the Datalogger Model for which you wish to create a program Select the Scan Interval This is how frequently measurements are made Wiring Wiring Diagram Wiring Text Y Next gt 4 Previous Under the Available Sensors and Devices list select the Sensors folder then select the Meteorological Relative Humidity amp Temperature sub folder Select HMP50 HMP60 Temperature amp Relative Hum
23. ls and tools Utility and Electrical e You can be killed or sustain serious bodily injury if the tripod tower or attachments you are installing constructing using or maintaining or a tool stake or anchor come in contact with overhead or underground utility lines e Maintain a distance of at least one and one half times structure height or 20 feet or the distance required by applicable law whichever is greater between overhead utility lines and the structure tripod tower attachments or tools e Prior to performing site or installation work inform all utility companies and have all underground utilities marked e Comply with all electrical codes Electrical equipment and related grounding devices should be installed by a licensed and qualified electrician Elevated Work and Weather e Exercise extreme caution when performing elevated work e Use appropriate equipment and safety practices e During installation and maintenance keep tower and tripod sites clear of un trained or non essential personnel Take precautions to prevent elevated tools and objects from dropping e Do not perform any work in inclement weather including wind rain snow lightning etc Maintenance e Periodically at least yearly check for wear and damage including corrosion stress cracks frayed cables loose cable clamps cable tightness etc and take necessary corrective actions e Periodically at least yearly check electrical ground connections
24. mm 1 Ib pound weight 0 454 kg Length 1 in inch 25 4 mm Pressure 1 psi Ib in 68 95 mb 1 ft foot 304 8 mm 1 yard 0 914 m Volume 1 UK pint 568 3 ml 1 mile 1 609 km 1 UK gallon 4 546 litres 1 US gallon 3 785 litres 1 oz ounce 28 35 g In addition while most of the information in the manual is correct for all countries certain information is specific to the North American market and so may not be applicable to European users Differences include the U S standard external power supply details where some information for example the AC transformer input voltage will not be applicable for British European use Please note however that when a power supply adapter is ordered it will be suitable for use in your country Reference to some radio transmitters digital cell phones and aerials may also not be applicable according to your locality Some brackets shields and enclosure options including wiring are not sold as standard items in the European market in some cases alternatives are offered Details of the alternatives will be covered in separate manuals Part numbers prefixed with a symbol are special order parts for use with non EU variants or for special installations Please quote the full part number with the when ordering Recycling information At the end of this product s life it should not be put in commercial or domestic refuse but sent for recycling Any batteries contained within
25. nada Corp CSC 14532 131 Avenue NW Edmonton Alberta T5L 4X4 CANADA www campbellsci ca e dataloggers campbellsci ca Campbell Scientific Centro Caribe S A CSCC 300N Cementerio Edificio Breller Santo Domingo Heredia 40305 COSTA RICA www campbellsci cc e info campbellsci cc Campbell Scientific Ltd CSL 80 Hathern Road Shepshed Loughborough LE12 9GX UNITED KINGDOM www campbellsci co uk e sales campbellsci co uk Campbell Scientific Ltd France 3 Avenue de la Division Leclerc 92160 ANTONY FRANCE www campbellsci fr e info campbellsci fr Campbell Scientific Spain S L Avda Pompeu Fabra 7 9 Local 1 08024 BARCELONA SPAIN www campbellsci es e info campbellsci es Campbell Scientific Ltd Germany Fahrenheitstrasse13 D 28359 Bremen GERMANY www campbellsci de e info campbellsci de Campbell Scientific Beijing Co Ltd 8B16 Floor 8 Tower B Hanwei Plaza 7 Guanghua Road Chaoyang Beijing 100004 P R CHINA www campbellsci com e info 9 campbellsci com cn Please visit www campbellsci com to obtain contact information for your local US or International representative
26. thermal radiation and adequately ventilated Standard measurement heights 1 5 m AASC 1 25 2 0 m WMO 2 0 m EPA See Section 10 Artributions and References 11 for a list of references that discuss temperature and relative humidity sensors When used in the field the HMP60 must be housed inside a solar radiation shield Typically the 41303 5A or RADO6 six plate solar radiation shield is used The HMP60 is held within the 41303 5A by a mounting clamp Figure 7 2 This probe may also be housed in a 41003 5 or RADIO ten plate shield Additional hardware must be used with the 41003 5 No additional hardware is required with the RADIO A 41322 Adapter Plate allows the HMP60 to be mounted in the lower part of the 41003 5 shield The white colour of these shields reflects solar radiation and the louvered construction allows air to pass freely through thereby keeping the probe at or near ambient temperature The RADO6 and RADIO use a double louvered design that offers improved sensor protection from insect intrusion and driving rain and snow In addition the RADO6 and RADIO shields have lower self heating in bright sunlight combined with higher temperatures gt 24 C 75 F and low wind speeds lt 2 m s 4 5 mph giving a better measurement Each of these solar radiation shields attaches to a crossarm mast or user supplied pipe with a 2 5 to 5 3 cm 1 0 to 2 1 in outer diameter Tools required for installing a radia
27. tion shield to a tripod or tower include 1 2 inch open end wrench small screwdriver provided with datalogger small Phillips screwdriver UV resistant cable ties small pair of diagonal cutting pliers adjustable wrench with a minimum 1 7 8 inch jaw size HMP60 Temperature and Relative Humidity Probe Yellow Shipping Cap remove before installation Figure 7 1 HMP60 as shipped 7 3 1 Installation in a 41303 5A or 41303 5B 6 Plate Shield 1 Pull off the yellow shipping cap see Figure 7 1 2 With a small Phillips screwdriver loosen the plastic split collar at the base of the shield reversing the removable portion if necessary and gently insert the probe 3 Tighten the screws on the collar until it firmly grips the probe body see Figure 7 2 Figure 7 2 HMP60 and 41303 5A Radiation Shield 7 3 2 Installation in a RADO6 6 Plate Shield or RAD10 10 Plate Shield Pull off the yellow shipping cap see Figure 7 1 Loosen the nut on the entry gland at the bottom of the shield Insert the sensor up into the gland as far as it will go See Figure 7 4 Using an adjustable wrench tighten the nut on the gland until the sensor is held firmly in place Do not overtighten Tue A 7 3 3 Mount the Shield 1 Attach the radiation shield to the tripod mast crossarm or tower leg using the supplied U bolt See Figure 7 3 and Figure 7 4 for examples of shield mounting 2 Route the cable to the datalogger and secure the cab
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