HC2S3 Temperature and Relative Humidity Probe
Contents
1. 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 CRBasic dataloggers are provided in the following sections Complete program examples for select dataloggers can be found in Appendix B Example Programs p B 1 User Manual 7 2 1 VoltSE Instruction NOTE When cable lengths are shorter than 6 1 metres or when power is switched the VoltSE measurement instruction is used with CRBasic dataloggers CR200 X CR6 and CR800 series CR1000 CR3000 to measure both temperature and relative humidity from the HC2S3 sensor The output scale is 0 to 1000 mV for the temperature range of 40 to 60 C and 0 to 1000 mV for the relative humidity range of 0 to 100 VoltSE Dest Reps Range SEChan MeasOff SettlingTime Integ FNotch Mult Offset 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 When the probe is connected to a CS110 Electric Field Meter the probe is measured by the CS110 s internal CR1000 datalogger module using VoltSE instructions2. 28 35 g 1 lb pound weight 0 454 kg Length 1 in inch 25 4 mm 1 ft foot 304 8 mm Pressure 1 psi Ib in 68 95 mb 1 yard 0 914 m 1 mile 1 609 km Volume 1 UK pint 568 3 ml 1 UK gallon 4 546 litres 1 US gallon 3 785 litres In addition while most of the information in the manual is correct for all countries certain information 1s 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 FP 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 the product o
3. 300 m 1000 ft with 12 V power 3 m 10 ft with 5 V power 3 mV maximum lt 1 mV 0 1 C 0 1 RH PT100 RTD IEC 751 1 3 Class B with calibrated signal conditioning 50 to 100 C default 40 to 60 C 0 to 1 0 V 0 1 C with standard configuration settings lt 0 1 C year Model HC2S3 Temperature and Relative Humidity Probe Sensor Time Constant 63 step change 1 m s air flow at sensor Standard PE Filter lt 22 s Optional Teflon Filter lt 30 s Accuracy over Measurement Range Temperature Accuracy Graph Accuracy f O N 0 8 1 0 4n O O OS E E 40 20 0 20 40 60 20 100 Temperature C 6 2 Relative Humidity Measurement Sensor ROTRONIC Hygromer IN1 Measurement Range 0 to 100 non condensing Output Signal Range 0 to 1 0 Vdc Accuracy at 23 C 0 8 RH with standard configuration settings Typical Long Term Stability lt 1 RH per year Sensor Time Constant 63 of a 35 to 80 RH step change 1 m s air flow at sensor Standard PE Filter lt 22 s Optional Teflon Filter lt 30 s Accuracy over Temperature Range 7 7 1 Installation User Manual RH Accuracy Graph E amp m m 5 5 40 20 0 20 40 60 80 100 Temperature C See Appendix D Changing the HC2S3 Settings p D 1 for default settings and digital interface information If you are programming your datalogger with Short Cut skip Section 7 1 Wiring to Datalogger p 7
4. Instructions The following example can be used directly with CR800 series CR1000 CR3000 and CR5000 dataloggers CR1000 program to measure HC2S3 with differential measurements Program measures HC2S3 with differential inputs once every second and stores the average temperature and a sample of the relative humidity every 60 minutes Wiring Diagram CR1000 Function Terminal Brown Temperature signal Jumper to Yellow Temperature signal reference White Relative Humidity signal 2H Yellow Signal Reference 2L Grey Power Ground G Clear Shield Ground Symbol Green Power 12V Public AirTC Public RH DataTable Temp_RH True 1 DatalInterval 0 60 Min 0 Average 1 AirTC IEEE4 0 Sample 1 RH IEEE4 EndTable BeginProg Scan 1 Sec 1 HC2S3 Temperature amp Relative Humidity Sensor measurements AirTC and RH VoltDiff AirTC 1 mV2500 1 True 0 _60Hz 0 1 40 VoltDiff RH 1 mV2500 2 True 0 _60Hz 0 1 0 If RH gt 100 AND RH lt 103 Then RH 100 CallTable Temp_RH NextScan EndProg Appendix C Absolute Humidity The HC2S3 measures relative humidity Relative humidity is defined by the equation below RH 100 A 1 e where RH is relative humidity e is vapour pressure in kPa and e is saturation vapour pressure in kPa Vapour pressure e is an absolute measure of the amount of water vapour in the air and is related to the dew point temperature Saturation vapour pressure is the maximum amount of water
5. Relative humidity and temperature signals are measured on single ended channels 1 and 2 respectively 250 us integration should be used in the VoltSE instructions 7 2 2 VoltDiff Instruction 7 3 When cable lengths are longer than 6 1 metres or when the sensor is constantly powered the VoltDiff measurement instruction is used to measure the HC2S3 sensor The output scale is 0 to 1000 mV for the temperature range of 40 to 60 C and 0 to 1000 mV for the relative humidity range of 0 to 100 VoltDiff Dest Reps Range DiffChan RevDiff SettlingTime Integ FNotch Mult Offset 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 Sensors should be located 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 thermal radiation and adequately ventilated Protect the filter at the top of the sensor from exposure to liquid water The hydrophobic nature of the filter repels light rain but driving rain ca
6. and Section 7 2 Datalogger Programming p 8 Short Cut does this work for you See Section 4 Quickstart p 2 for a Short Cut tutorial Wiring to Datalogger Connections to Campbell Scientific dataloggers for measuring humidity and temperature using two single ended or two differential analogue inputs are given in Table 7 1 and Table 7 2 Use a single ended analogue measurement when the cable length is less than 6 1 m 20 ft or if power is switched off between measurements Otherwise use a differential analogue measurement See Section 8 3 Long Cable Lengths p 12 for a discussion on errors caused by long cable lengths Table 7 1 Wire Colour Function and Datalogger Connection for Single Ended Measurement Wire Colour Wire Function Datalogger Connection Terminal Temperature U configured for single ended analogue Brown nal input 5 SE single ended analogue voltage input Relative U configured for single ended analogue White bari cs n humidity signal input SE Yell ignal refi z ellow Signal reference andlbine sound Grey Power ground Clear Shield Green Power 12V or SW12V U channels are automatically configured by the measurement instruction Model HC2S3 Temperature and Relative Humidity Probe CAUTION When measuring the HC2S3 with single ended measurements the yellow and grey leads must both be connected to on the datalogger Doing otherwise will conn
7. the RDD command to get temperature and relative humidity data from the probe Sensor Wiring E2 05XX MOD Cable SDM SIO1 CR1000 Blue Z Red Y Grey Yellow G Green 12V Clear Ground SDM SIO1 Wiring SDM SIO1 CR1000 Cl Cl C2 C2 C3 C3 G G 12V 12V NOTE If the Rotronic cable includes brown and white wires voltage signals for temperature and humidity Campbell Scientific recommends capping them with pn 27749 or equivalent insulated caps to prevent the possibility of shorting E 5 Appendix E HC2S3 Digital Communications Example CR1000 Program CR1000 Program Declare variables Public SerialIndest As String 100 Dim String_1 As String Const CRLF CHR 13 CHR 10 Dim HC2S3_Split 17 As String 40 Alias HC2S3_Split 2 RH_Str RH string Alias HC2S3_Split 6 TempC_Str Temp string Alias HC2S3_Split 17 HC2S3_SN_Str HC2S3 serial number string Public TempC RH NBytesReturned Const SensorPort 32 SDM SIO1 rotary switch set at DataTable Table1 1 1 DataInterval 0 15 Min 10 Average 1 TempC FP2 False Sample 1 RH FP2 EndTable BeginProg SerialOpen SensorPort 19200 51 100 200 51 is for half duplex String_1 F 0RDD CRLF RS485 command to send data Scan 5 Sec SerialFlush SensorPort SerialOut SensorPort String_1 0 1 100 Send command to send data Delay 0 500 mSec Get data from probe SerialInRecord ComSDC7 SerialIndest amp H6464 0 amp H3B48 NBytesReturned 01 P
8. to the saturated water vapour pressure above liquid water even at temperatures below 0 C where ice might form This is the common way to express relative humidity and is as defined by the World Meteorological Organization If an RH value is required referenced to ice the HC2S3 readings will need to be corrected One consequence of using water as the reference is that the maximum humidity that will normally be output by the sensor for temperatures below freezing is as follows 100 RH at 0 C 82 RH at 20 C 95 RH at 5 C 78 RH at 25 C 91 RH at 10 C 75 RH at 30 C 87 RH at 15 C In practical terms this means that for instance at 20 C the air is effectively fully saturated when the sensor outputs 82 RH C 2 Appendix D Changing the HC2S3 Settings D 1 HC2S3 Default Settings The HC2S3 probe has the following default settings which can be changed as described in the following sections Additional information can be found in Rotronic s User Manual E M HC2 Probes VXXXX which can be downloaded from Rotronic s website www rotronic usa com Default Settings Configurable Settings Unit system Metric or English Psychometric calculation Output 1 parameter scale and unit Output 2 parameter scale and unit Communications Protocol RS 485 Address Device name Humidity temperature adjustment Device write protection Limit humidity output to 100 RH Out of limit value digital alarm Data r
9. 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 Relative Humidity is relative to saturation above water even below freezing point This is why these sensors should not measure 100 RH below zero degrees C as described in Appendix C 1 Measurement Below 0 C p C 2 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 A 1 that a change in air temperature will change the relative humidity without causing a change 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 50 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 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 relativ
10. 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 1136 WMO 2008 Guide to Meteorological Instruments and Methods of Observation World Meteorological Organization No 8 7th edition Geneva Switzerland Appendix A Importing Short Cut Code Into 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 either CRBasic Editor or Edlog program editor These files normally reside in the C campbellsci SCWin folder and have the following extensions DEF wiring and memory usage information C
11. C DegC y Relative Humidity RH HC2S3 panel switched Units for Air Tempera Units for Relative Humi HC2S3 panel switched power Temperature and Relative Humidity Sensor Units for Air Temperature Deg C Deg F K The HC2S3 has a thred Units for Relative Humidity scan rate must be gre Y gt Cancel Help 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 Model HC2S3 Temperature and Relative Humidity Probe 5 Overview 7 9 Short Cut CR1000 C Campbellsci SCWin untitled sow Scan Interval 5 0000 Seconds Sax File Program Tools Help CR1000 Progress 1 New Open CR1000 Wiring Diagram for untitled scw Wiring details can be found in the help file 2 Datalogger 3 Sensors HC253 PS AirTC RH ai 4 Outputs 5 Finish Brown 1H White Clear Grey Wiring Yellow Wiring Diagram 4r Wiring Text print 4 Previous Next Finish Help 7 Select any other sensors you have 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 a
12. EMPT 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 1 Introduction 1 2 Cautionary StatementS oooooccononononnnnnnnnnnnnnnonanananannnos 1 3 Initial INSPECTION oooomncccccnocoonncncnnnnnnnnnnnonennonnannnnnn os 1 3 1 Ships Wath cestos 2 A QUICK SE ange 2 5 OVEMVIEW ul lla 4 6 Specifications ila 5 6 1 Temperature Measurement ie 5 6 2 Relative Humidity Measurement en 6 T Installation ann nen 7 7 1 Wiring to Datalogger i i ei 7 1 2 Datalogger Programming ii 8 7 2 1 VoltSEO Instruction i 9 7 2 2 VoltDiffQ Instruction nennen 9 7 3 Installation O 9 7 3 1 Installation in a 41003 5 10 Plate Shield 10 7 3 2 Installation in a RADIO 10 Plate Shield 10 7 33 Mount the Shield ernennen 10 8 Operation aiar 11 8 1 MEASUFeMENt zz ici ERNIA OSARE RNA A nennen 11 8 2 Low Power Operation nennen 11 8 3 Long Cable Lengths
13. IVANVIA YAS CAMPBELL SCIENTIFIC WHEN MEASUREMENTS MATTER HC2S3 Temperature and Relative Humidity Probe Issued 11 8 15 Copyright 1990 2015 Campbell Scientific Inc Printed under licence by Campbell Scientific Ltd CSL 930 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 period it should be accom
14. R6 CR 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 CR1 CR8 CR3 or CR5 extension for CR6 CR200 X 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 e
15. a USB port on the computer From the main screen click on the devices and groups search for master devices USB masters HW4 should find the probe and show the current values File Devices and Groups View Settings and Tools Help HEE NE dik x 95 New Group1 E D Device Manager H Data Logging c Probe Adjustment HC2 53 Humidity rh HC2 53 Temperature C HC2 83 ne C 4 35 00 PM 4 37 15 PM v3 0 1 15546 Appendix D Changing the HC2S3 Settings Click on Device Manager select Analog Outputs to see the following screen Device Manager File Tools Help Device Information Settings Analog Outputs Alarm Analog Signal RH Sensor Status Output 1 Parameter Humidity Range 0 100 Output 2 Parameter Temperature Range 40 60 DK Cancel Change the lower and upper range values and click OK The following screen shows the range 60 to 30 Device Manager File Tools Help Device Information Settings Analog Outputs Alarm Analog Outputs Analog Signal RH Sensor Status Output 1 Parameter Humidity Range po 100 Output 2 Parameter Temperature Range 60 113 DK Cancel D 4 Multiplier and Offsets for Temperature Range Analog Output 2 is 0 to 1V 1000 mV for the temperature range If the range has been changed from the default 40 to 60 then the multiplier and offset for the measurement instruct
16. alled in close proximity to the ocean or other bodies of salt water A coating of salt mostly NaCl may build up on the radiation shield sensor filter and even the sensors A build up of salt on the filter or sensors will delay or destroy the response to atmospheric humidity 13 Model HC2S3 Temperature and Relative Humidity Probe Long term exposure of the relative humidity sensor to certain chemicals and gases may affect the characteristics of the sensor and shorten its life The resistance of the sensor depends strongly on the temperature and humidity conditions and the length of the pollutant influence The sensor should be calibrated annually Please obtain an RMA number before returning the HC2S3 to Campbell Scientific for calibration Please refer to Warranty and Assistance sections at the beginning of the manual 10 Attributions and References 14 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 EPA 2000 Meteorological Monitoring Guidance for Regulatory Modelling Applications EPA 454 R 99 005 Office of Air Quality Planning and Standards Research Triangle Park North Carolina 27711 EPA 2008 Quality
17. arse RH and temp from string SplitStr HC2S3_Split Seriallndest 17 7 RH RH_Str TempC TempC_Str CallTable Tablei 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 Canada Corp CSC 14532 131 Avenue NW Edmonton Alberta T5L 4X4 CANADA www campbellsci ca e dataloggers O 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
18. by a keyed connector and diode in the connector interface provided with the Campbell Scientific cable Campbell Scientific offers two filters Polyethylene filter Default filter protection against fine dust particles no water absorption or retention good response time User Manual Teflon filter Recommended for marine environments slower response time than the polyethylene filter ordered separately 6 Specifications 6 1 Features e Well suited for long term unattended applications e Accurate and rugged e Compatible with the following CRBasic dataloggers CR200 X series CR6 CR800 series CR1000 CR3000 CR9000 X Operating Limits Storage Temperature Probe Length Probe Diameter Probe Weight Filter Power Consumption Supply Voltage using CSI cable Start Up Time Maximum Startup Current Maximum Cable Length Analogue outputs Offset at 0 V Deviation from Digital Signal Temperature Measurement Sensor Measurement Range Output Signal Range Accuracy at 23 C Long Term Stability 40 to 100 C 50 to 100 C 85 mm 3 3 in 183 mm 7 25 in including connector 15 mm 0 6 in 10 g 0 35 oz Polyethylene optional Teflon ordered separately lt 4 3 mA at5 V lt 2 0 mA at 12 V 5 to 24 Vdc 12 Vdc recommended 1 5 s typical Rotronic specification Campbell Scientific recommends 2 s at 60 C 3 s at 0 C 4 s at 40 C lt 50 mA during 2 us
19. datalogger UV resistant cable ties small pair of diagonal cutting pliers adjustable wrench with a minimum 1 7 8 inch jaw size Attach the probe to the cable by aligning the keyed connectors pushing the connectors together and tightening the knurled ring 7 3 1 Installation in a 41003 5 10 Plate Shield 1 2 The HC2S3 is shipped with an adapter to work with the 41003 5 10 plate shield Loosely thread the collar adapter into the base of the 10 plate shield Insert the HC2S3 sensor into the collar Leave about 2 5 cm 1 in of the sensor exposed below the collar See Figure 7 1 Hold the collar and sensor and finish threading the collar into the shield by hand Tighten the collar around the probe until it firmly grips the body of the probe Use an adjustable wrench if necessary but do not overtighten the collar 7 3 2 Installation in a RAD10 10 Plate Shield j Loosen the nut on the entry gland at the bottom of the shield Insert the sensor up into the gland Leave about 2 5 cm 1 in of the sensor exposed below the nut See Figure 7 2 Using an adjustable wrench tighten the nut on the gland until the sensor is held firmly in place Do not overtighten 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 1 and Figure 7 2 for examples of shield mounting Route the cable to the datalogger and secure the cable to the mounting structure
20. dit 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 Into CRBasic Editor Appendix B Example Programs B 1 Example Program Using Single Ended Measurement Instructions The following example can be used directly with CR800 series CR1000 CR3000 and CR5000 dataloggers Program measures HC2S3 with single ended inputs once every 5 seconds and stores the average temperature and a sample of the relative humidity every 60 minutes Wiring Diagram HC2S3 wire CR1000 Colour Function Terminal Brown Temperature signal SE2 White Relative Humidity signal SE1 Yellow Signal Reference Ground Symbol Grey Power Ground Ground Symbol Clear Shield Ground Symbol Green Power 12V Public AirTC Public RH DataTable Temp_RH True 1 DatalInterval 0 60 Min 0 Average 1 AirTC IEEE4 0 Sample 1 RH IEEE4 EndTable BeginProg Scan 5 Sec 1 0 PortSet 9 1 Turn on switched 12V Delay 0 3 Sec 3 second delay HC2S3 Temperature amp Relative Humidity Sensor measurements AirTC and RH VoltSE RH 1 mV2500 1 0 0 _60Hz 0 1 0 VoltSe AirTC 1 mV2500 2 0 0 _60Hz 0 1 40 PortSet 9 0 Turn off switched 12V If RH gt 100 AND RH lt 103 Then RH 100 CallTable Temp_RH NextScan EndProg Appendix B Example Programs B 2 Example Program Using Differential Measurement
21. e Declaration of Hazardous Material and Decontamination form Refer to the Assistance page at the beginning of this manual for more information User Manual 9 1 Troubleshooting Symptom Relative Humidity is reported as 9999 NAN 40 C 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 or differential measurement instruction is correct for the datalogger type 3 Verify the green power wire is connected to the 12V SW12V or 5V terminal Cables longer than 3 m 10 ft should be powered by the 12V rather than the 5V terminal 4 A voltmeter can be used to check the output voltage for temperature and relative humidity on the brown and white wires respectively temperature C mV 0 1 40 0 relative humidity mV 0 1 Symptom Incorrect temperature or relative humidity 1 Verify the multiplier and offset parameters are correct for the desired units Section 7 2 1 VoltSE Instruction p 9 and Section 7 2 2 VoltDiff Instruction p 9 and temperature range 2 Default settings are listed in Appendix D Changing the HC2S3 Settings p D 1 which include the setting Limit humidity output to 100 This setting is disabled for probes purchased through Campbell Scientific Accuracy of the humidity measurement over temperature is shown in the graph in Section 6 Specificatio
22. e CR1000 Program CR1000 Program Declare variables Public SerialIndest As String 100 Dim String_1 As String Const CRLF CHR 13 CHR 10 Dim HC2S3_Split 17 As String 40 Alias HC2S3_Split 2 RH_Str RH string Alias HC2S3_Split 6 TempC_Str Temp string Alias HC2S3_Split 17 HC2S3_SN_Str HC253 serial number string Public TempC RH NBytesReturned DataTable Table1 1 1 DataInterval 0 15 Min 10 Average 1 TempC FP2 False Sample 1 RH FP2 EndTable BeginProg SerialOpen ComSDC7 19200 0 0 100 Configure CS I O port String_1 F 0RDD CRLF RS485 command to send data Scan 5 Sec 0 0 SerialFlush 34 SerialOut ComSDC7 String_1 0 2 100 Send command to send data Delay 8 588 mSec Get data from probe SerialInRecord ComSDC7 SerialIndest amp H6464 0 amp H3B48 NBytesReturned 01 Parse RH and temp from string SplitStr HC2S3_Split Seriallndest 17 7 RH RH_Str TempC TempC_Str CallTable Table1 NextScan EndProg E 4 Appendix E HC2S3 Digital Communications E 4 RS 485 Communications using an SDM SIO1 Serial I O Module The HC2S3 can be interfaced to a Campbell Scientific datalogger through an SDM SIO1 Serial I O Module using the Rotronic E2 05XX MOD RS485 cable as described below The example program uses the SerialOpen instruction to configure the SDM SIO1 for RS 485 half duplex COMport 32 at 19200 baud no parity 1 stop bit and 8 data bits and serial instructions to send
23. e humidity is often not useful A more useful quantity is the mean vapour pressure The mean vapour pressure can be computed by the datalogger program as shown in the following example CR1000 Program that Computes Vapour Pressure and Saturation Vapour Pressure Brown white Yellow Grey Clear Green Wiring Diagram CR1000 program that calculates Vapour Pressure CR1000 Function Terminal Temperature signal SE2 Relative Humidity signal SE1 Signal Reference Ground Symbol Power Ground Ground Symbol Shield Ground Symbol Power 12V C 1 Appendix C Absolute Humidity Public AirTC Public RH Public RH_Frac e_Sat e_kPa DataTable Temp_RH True 1 DataInterval 0 60 Min 0 Average 1 AirTC IEEE4 0 Sample 1 RH IEEE4 Sample 1 e_kPa IEEE4 EndTable BeginProg Scan 1 Sec 1 PortSet 9 1 Turn on switched 12V Delay 8 3 Sec 3 second delay HC2S3 Temperature amp Relative Humidity Sensor measurements AirTC and RH VoltSE AirTC 1 mV2500 2 0 0 _60Hz 0 1 40 0 VoltSE RH 1 mV2500 1 0 0 _60Hz 0 1 0 If RH gt 100 AND RH lt 103 Then RH 100 PortSet 9 0 Turn off switched 12V Calculate Vapour Pressure Convert RH percent to RH Fraction RH_Frac RH 0 01 Calculate Saturation Vapour Pressure SatVP e_Sat AirTC Compute Vapour Pressure RH must be a fraction e_kPa e Sat RH_Frac CallTable Temp_RH NextScan EndProg C 1 Measurement Below 0 C The HC2S3 provides a humidity reading that is referenced
24. e 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 RTDAO software E 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 Sie Cul 3 When Short Cut opens select New Program n Short Cut eo a File Program Tools Help Progress 5 Welcome to Short Cut Short Cut will help 1 New Open you generate a datalogger program The basic steps are 1 Create New Open Program 2 Select Datalogger 3 Select Sensors Wiring 4 Select Outputs 5 Finish Compile the Program E Click New Program to begin Click Open Program to open an existing i Short Cut program 4 Select Datalogger Model and Scan Interval default of 5 seconds is OK for most applications Click Next User Manual A 7 Short Cut CR1000 C Campbelisci SCWin untitled scw Scan Interval 5 0000 Seconds ea ay File Program Tools Help Progress Datalogger Model Select the Datalogger Model for 1 New Open ive you wish to create a 3 Sensors 4 Outputs Scan Interval Select the Scan Interval 5 Finish This is how frequently Wiring Wiring Diagram Wiring Text Y 4 previous Next gt Finish Help 5 Under the Available Sensors and De
25. ecording Automatic humidity sensor test Humidity sensor drift compensation Fail safe mode Simulator mode Digital Interface Factory Default Metric None Humidity 0 100 RH Temperature 40 60 deg C RO ASCII 0 Probe type Disabled Disabled Disabled Enabled loop mode 10 min interval Disabled Disabled Disabled Disabled Interface Type UART Universal Asynchronous Receiver Transmitter Organization Dialog duplex Default Configuration Baud rate 19200 Parity none Data bits 8 Stop fits 1 Flow Control none Logical Levels Logical 0 lt 0 3V VDD Logical 1 lt 0 8V VDD D 1 Appendix D Changing the HC2S3 Settings D 2 Software and Hardware Requirements IMPORTANT For temperature Analog Output 2 the HC2S3 default range is 40 to 60 C for 0 to 1V Changing the range requires Rotronic HW4 Software Version 2 1 0 or higher and the Rotronic model AC3001 USB adapter cable Power to the probe is provided by the USB port Prior to using the AC3001 cable the ROTRONIC USB driver must be installed on the PC Both the driver and the installation instructions document E M HW4v3 Main are located on the HW4 CD D 3 Changing the Temperature Range D 2 Install the HW4 software and drivers for the AC3001 USB cable on the PC Connect the HC2S3 probe to the AC3001 cable making sure the connectors are properly aligned before tightening the knurled ring Plug the AC3001 cable into
26. ect the datalogger s analogue and power ground planes to each other which in some cases can cause offsets on low level analogue measurements To avoid 2 mA flowing into analogue ground switch power on off for its measurement Table 7 2 Wire Colour Function and Datalogger Connection for Differential Measurement Wire Colour Wire Function Datalogger Connection Terminal Brown Temperature signal u saa ae ig dica Jumper to Temperature signal U configured for differential analogue Yellow reference input L Diff L White Relative humidity U configured for differential analogue signal input H Diff H Yellow Signal reference y I ar male Grey Power ground G Clear Shield Green Power 12V or SW12V 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
27. idity or analogue value trend or 1234 56 Float Temperature value C String Temperature engineering unit 0 1 Bool Temperature alarm out of limits Char Temperature trend or Dp String Calculated parameter type nc no calculation Dp dew point Fp frost point 1234 56 Float Calculated numerical value C String Calculated parameter engineering unit 0 1 Bool Calculated parameter alarm out of limits Char Calculated parameter trend or 1 255 Byte Device type HygroClip Logger HF HM V1 0 String Firmware version 12345678 String Device serial number Name String Device name 000 255 Byte Alarm Byte Bit0 out of limits value Bit5 sensor quality Bit6 humidity simulator Bit7 temperature simulator Example data returned from the RDD command FOORDD CR F00rdd 001 4 45 RH 000 20 07 C 000 nc C 000 001 V1 7 1 0060568338 HC2 S3 000 4 Appendix E HC2S3 Digital Communications E 3 RS 485 Communications using an MD485 RS 485 Interface The HC2S3 can be interfaced to a Campbell Scientific datalogger through an MD485 RS 485 Interface using the Rotronic E2 05XX MOD RS485 cable as described below Settings for the RS485 port on the MD485 must be configured to match the configuration of the HC2S3 which are 19200 baud No Parity 8 Data Bits 1 Stop bit and No Flow Control Device Configuration Utility Campbell Scien
28. ion will have to be changed from those shown for the program examples in Appendix B Example Programs p B 1 For example for a range of 60 to 30 the multiplier to convert the measurement result mV to temperature is the full scale range of temperature divided by the full scale range of mV and the Offset is 60 0 as shown below Multiplier mV 90 C 1000 mV 0 09 Offset 60 0 Example measurement instructions for CR1000 datalogger with the sensor wired to SE channel 2 Public AirTC VoltSe AirTC 1 mV2500 2 0 0 _60Hz 0 09 60 D 3 Appendix D Changing the HC2S3 Settings D 4 Appendix E HC2S3 Digital Communications E 1 HC2S3 Digital Interface Specifications The HC2S3 has a UART Universal Asynchronous Receiver Transmitter that provides two way digital communications with the probe Interface cables can be ordered through Rotronics for connecting the probe to an RS 485 port Rotronic pn E2 05XX MOD a computer s RS 232 port Rotronic pn AC3002 or USB port Rotronic pn AC3001 Connections to a Campbell Scientific datalogger through an MD485 RS485 Interface or SDM SIO1 Serial I O Module with the Rotronic E2 05XX MOD RS 485 cable are described in Appendix E 3 RS 485 Communications using an MD485 RS 485 Interface p E 3 and Appendix E 4 RS 485 Communications using an SDM SIO1 Serial I O Module p E 5 respectively HC2S3 Digital Interface Specifications Interface Type UART Universal Asynchronou
29. measurement the signal reference and power ground are both connected to ground at the datalogger and both serve as the return path for power The voltage will drop along those leads because the wire itself has resistance The HC2S3 draws approximately 2 mA when powered with 12 V The wire used in the HC2S3 pn 27746 has resistance of 14 74 Q 304 8 m 1000 ft Because the signal reference and the power ground are both connected to ground at the datalogger the effective resistance of those wires together is half of 14 74 Q 304 8 m 1000 ft or 7 37 Q 304 8 m 1000 ft Using Ohm s law the voltage drop Va along the signal reference power ground is given by Eq 1 V IxR 2 mA x 7 37 0 1000 ft 1 14 7 mV 1000 ft This voltage drop will raise the apparent temperature and relative humidity because the difference between the signal and signal reference lead at the datalogger has increased by Va The approximate error in temperature and relative humidity is 0 15 C and 0 15 per 30 5 m 100 ft of cable length respectively assuming a temperature range of 40 to 60 C When there are not enough inputs available on the datalogger to allow for differential measurements single ended measurements can be made and the errors associated with cable length subtracted as offsets 9 Toubleshooting and Maintenance 12 NOTE All factory repairs and recalibrations require a returned material authorization RMA and completion of th
30. n Shield on a CM200 Series Crossarm left and on a tripod mast right n 11 HC2S3 and RADIO Radiation Shield on a tripod mast 11 Wire Colour Function and Datalogger Connection for Single Ended Measurement iii 7 Wire Colour Function and Datalogger Connection for Differential Measurement OS 8 Model HC2S3 Temperature and Relative Humidity Probe 1 Introduction The HC2S3 is a rugged accurate temperature and relative humidity probe that is ideal for long term unattended applications The probe uses Rotronic s IN1 capacitive sensor to measure relative humidity and a 100 Q PRT to measure temperature For optimum results the HC2S3 should be recalibrated annually Before using the HC2S3 please study e Section 2 Cautionary Statements p 1 e Section 3 Initial Inspection p 1 e Section 4 Quickstart p 2 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 damage or cut the cable jacket If damage to the cable is suspected consult a Campbell Scientific application engineer e Although rugged the HC2S3 should be handled as a precision scientific instrument e Do not touch the sensor eleme
31. n force itself into the pore structure of the filter and take time to dry out Standard measurement heights 1 5 m AASC 1 25 to 2 0 m WMO 2 0 m EPA Model HC2S3 Temperature and Relative Humidity Probe 10 See Section 10 Attributions and References p 14 for a list of references that discuss temperature and relative humidity sensors When used in the field the HC2S3 must be housed in a radiation shield such as the 41003 5 or RADIO naturally aspirated shields or the 43502 motor aspirated shield please refer to the 43502 product manual for installation details 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 RADIO uses a double louvered design that offers improved sensor protection from insect intrusion and driving rain and snow In addition the RAD10 shield has 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 The 41003 5 and RAD10 Radiation Shields attach to a crossarm mast or user supplied pipe with a 2 5 to 5 3 cm 1 0 to 2 1 in outer diameter See Figure 7 1 and Figure 7 2 for examples of shield mounting Tools required for installing an HC2S3 sensor in a radiation shield to a tripod or tower include 1 2 inch open end wrench small screwdriver provided with
32. nd 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 The HC2S3 is a digital probe with linear voltage outputs for temperature and humidity and a UART serial interface Its voltage signals can be measured with two single ended or two differential inputs on the datalogger Interfacing with the UART is described in Appendix E HC2S3 Digital Communications p E 1 The digital to analogue converter used to generate the analogue output signals has 16 bit resolution Temperature range and other default settings can be changed as described in Appendix D Changing the HC2S3 Settings p D 1 A cable ordered through Campbell Scientific for the HC2S3 includes an internal voltage regulator that applies 3 3 V to the probe from a 5 to 24 V power source 12V power is recommended for use with Campbell Scientific dataloggers When minimizing power use is important power can be switched on and off for the measurement provided there is a three second warm up delay Switching power avoids constant current flow through datalogger ground which can affect the accuracy of low level single ended voltage measurements Probes are polarity protected
33. ns p 5 For example at 20 C the accuracy is 2 3 so a reading of 102 3 at 100 humidity is within the accuracy specification Programs created by Short Cut set humidity values greater than 100 and less than 103 to 100 Humidity values greater than 103 are left unchanged to indicate a problem with the probe or measurement 9 2 Maintenance The HC2S3 probe requires minimal maintenance but dust debris and salts on the filter cap will degrade sensor performance Check the white filter on the end of the sensor for debris If dirt or salt is engrained into the filter it should be cleaned with distilled water or replaced Make sure the filter is connected firmly with your fingers do not over tighten Check the radiation shield monthly to make sure it is free from dust and debris To clean the shield remove the sensor from the shield 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 Replace corroded discoloured or clogged filters To replace the filter unscrew the filter from the probe and pull it straight away being careful not to bend or damage the sensors Before putting on the replacement filter check the alignment of the sensors with the probe and if necessary carefully correct the alignment before installing the filter The Teflon filter is recommended when the sensor is inst
34. nt e Santoprene rubber which composes the black outer jacket of the HC2S3 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 Refer to Section 3 1 Ships With p 2 to ensure that parts are included The HC2S3 probe and its calibration card are shipped in a small box with the box and pn 27731 Hex Plug attached to the cable Model HC2S3 Temperature and Relative Humidity Probe 4 3 1 Ships With Quickstart The HC2S3 ships with 1 27731 Gill Radiation Shield Hex Plug 1 Calibration Card 1 Resource DVD Short Cut is an easy way to program your datalogger to measure the HC2S3 sensor and assign datalogger wiring terminals Use the following procedur
35. ons 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 materials and tools U
36. panied 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 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 mm Mass 1 oz ounce
37. r 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 Sa 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 z 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 with all instructi
38. s Receiver Transmitter Organization Dialog duplex Default Configuration Baud rate 19200 Parity none Data bits 8 Stop fits 1 Flow Control none Logical Levels Logical 0 lt 0 3V VDD Logical 1 lt 0 8V VDD E 2 HC2S3 Communications Protocol Complete information on the HC2S3 Commands and Communication Protocol can be found in the Rotronic E M AC3000 CP_XX manual available from Rotronic s website www rotronic usa com The RDD command to Read Values is used in the example datalogger programs to get temperature and relative humidity values from the probe and is described below RDD command read values Returns the measured and calculated values as well as the information necessary to interpret the data calculated parameter type engineering units status serial number and name of the device etc E 1 Appendix E HC2S3 Digital Communications E 2 Command Format ID Adr RDD Chksum or CR Answer format ID Adr RDD Chksum or CR The data are returned according to the following structure Example Type Description 1 3 Byte Probe type 1 digital probe 2 analogue probe 3 pressure probe 1234 56 Float Relative humidity or analogue value RH String Humidity or analogue value engineering unit 0 1 Bool Humidity or analogue value alarm out of limits Char Hum
39. tific software available as a free download is used to configure the MD485 Configuration settings for the MD485 are shown below MD485 Tab CS I O AND RS 485 CS VO Tab SDC Address 7 RS485 Tab RS485 baud 19200 Device Configuration Utility 1 18 File Options Help Device Type Deployment MD485 CSI O RS 232 RS 485 OS Version 3 Serial Mumber 1654 Active Ports ANO v Protocol Configuration Transparent Communication v Active Ports PC Serial Port This setting specifies which two ofthe three interfaces will be active on Baud Rate the MD485 device Choices include the following Apply Factory Defaults Read File E 3 Appendix E HC2S3 Digital Communications Sensor Wiring E2 05XX MOD Cable MD485 CR1000 Blue A Red B Green 12V Grey Yellow G Clear Ground Symbol NOTE If the Rotronic cable includes brown and white wires voltage signals for temperature and humidity Campbell Scientific recommends capping them with pn 27749 or equivalent insulated caps to prevent the possibility of shorting Connect the CS I O port of MD485 to CS VO port on CR1000 with an SC12 cable The following example CR1000 program configures the CS I O port as COMSDC7 using the SerialOpen instruction sends the RDD Read Values command FOORDD CR to the probe and parses temperature and relative humidity values from the data string returned by the probe Exampl
40. tility 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 WHILE EVERY ATT
41. ueneessesisn eines nasse 12 9 Toubleshooting and Maintenance 12 9 1 Troublesh otin setin n en reon ree arae SEEE EEE E R R EEE 13 9 2 Maintenance ea cani eee N EE E A 13 10 Attributions and References mmmmocccccccncccnnnnnnanananane 14 Appendices A Importing Short Cut Code Into CRBasic Editor A 1 B Example Programs cccoocoocononcnnnnnnnnnnnonnonananannaanns B 1 B 1 Example Program Using Single Ended Measurement LEa Rna Cean ak Ae E na Ass Re B 1 B 2 Example Program Using Differential Measurement Instructions B 2 C Absolute Humidity ooooonnnnnncnncncccccconananannnnnnnnnonnonanaaa O1 Cl Measurement Below 0 C C 2 D Changing the HC2S3 Settings D 1 D 1 D 2 D 3 D 4 HC2S3 Default Settings i D 1 Software and Hardware RequirementsS n D 2 Changing the Temperature Range csecseeereseeeeeeeeeeeees D 2 Multiplier and Offsets for Temperature Range D 3 E HC2S3 Digital Communications E 1 Figures Tables 7 1 7 2 7 1 7 2 HC2S3 Digital Interface Specifications inn E 1 HC2S3 Communications Protocol i E 1 RS 485 Communications using an MD485 RS 485 Interface E 3 RS 485 Communications using an SDM SIO1 Serial I O Module E 5 HC2S3 and 41003 5 Radiatio
42. using cable ties User Manual Figure 7 1 HC2S3 and 41003 5 Radiation Shield on a CM200 Series Crossarm left and on a tripod mast right II Figure 7 2 HC2S3 and RAD10 Radiation Shield on a tripod mast 8 Operation 8 1 Measurement The probe uses a Rotronic INI capacitive sensor to measure RH and a 100 Q PRT to measure temperature Campbell Scientific dataloggers measure the analogue voltage outputs of the HC2S3 Temperature and Relative Humidity Probe with either VoltSE or VoltDiff measurement instructions 8 2 Low Power Operation The HC2S3 draws approximately 2 mA powered from 12V The HC2S3 can be continuously powered from the 12V terminal or power can be switched with the 11 Model HC2S3 Temperature and Relative Humidity Probe SW12V terminal to conserve battery life When power is switched a three second warm up period is required This is programmed with the Delay instruction using 0 for the delay option 8 3 Long Cable Lengths For cable lengths longer than 6 1 m 20 ft Campbell Scientific recommends measuring the voltage signals using differential inputs Using single ended measurements with long cable lengths introduces the errors discussed below Connections for differential inputs are given in Table 7 2 The signal reference yellow and the power ground grey are connected inside the HC2S3 When the HC2S3 temperature and relative humidity are measured using a single ended analogue
43. vices list select the Sensors Meteorological Relative Humidity amp Temperature HC2S3 Temperature and Relative Humidity Sensor folder Choose either constant power or panel switched power uses less current Click 5 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 9 Short Cut CR1000 C Campbelisci SCWin untitled scw Scan Interval 5 0000 Seconds elel File Program Tools Help Available Sensors and Devices Selected ress Prog E CR1000 Sensor Measurement 1 New Open E en Ri pera 2 Datalogger Ga Generic Measurements Geotechnical amp Structural Default Batty 3 Sensors 4 y Meteorological PTemp_C 4 Outputs Barometric Pressure L 5 Finish Ea Cloud Height Di i Precipitation E Present Weather Wiring 4 Relative Humidity amp Temperature Wiring Diagram L 083E Temperature and Relative H Q CS205 Fuel Temperature Sensor gt SE Q cs210 10162 Enclosure Relative Q C5215 Temperature amp Relative Hu Q CS500 Temperature amp Relative Hu Q CS505 Fuel Moisture Sensor L CS506 Fuel Moisture Sensor 4 y HC253 Temperature and Relative O HC2S3 constant power L HC2S3 panel switched power HMP155 Temperature and Relati A HMP35C Temperature amp Relative m p 9 HC253 panel switched power Version 1 0 Properties wiring Temperature AirT
44. www campbellsci es e info campbellsci es Campbell Scientific Ltd Germany Fahrenheitstrassel3 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 campbellsci com cn Please visit www campbellsci com to obtain contact information for your local US or International representative
Download Pdf Manuals
Related Search