Campbell EE181, Instruction Manual

Page 1: ...INSTRUCTION MANUAL EE181 Temperature and Relative Humidity Probe Revision 3 17 C o p y r i g h t 2 0 1 6 2 0 1 7 C a m p b e l l S c i e n t i f i c I n c...

Page 2: ......

Page 3: ...ucts to CSI CSI will return such Products by surface carrier prepaid within the continental United States of America To all other locations CSI will return such Products best way CIP port of entry per...

Page 4: ...address is CAMPBELL SCIENTIFIC INC RMA _____ 815 West 1800 North Logan Utah 84321 1784 For all returns the customer must fill out a Statement of Product Cleanliness and Decontamination form and comply...

Page 5: ...beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit cl...

Page 6: ......

Page 7: ...7 1 Wiring to Datalogger 7 7 2 Datalogger Programming 7 7 2 1 VoltSE Instruction 7 7 3 Field Installation 8 7 3 1 Shield Installation 10 7 3 1 1 Installation in a RAD10E 10 Plate Shield 10 7 3 1 2 In...

Page 8: ...n Shield on a tripod mast 11 Tables 7 1 Wire Color Function and Datalogger Connection for Single Ended Measurement 7 CRBasic Examples B 1 CR1000 Program Measuring the EE181 B 1 B 2 CR6 Program Measuri...

Page 9: ...nt Santoprene rubber which composes the black outer jacket of the EE181 cable will support combustion in air It is used because of its resistance to temperature extremes moisture and UV degradation It...

Page 10: ...Short Cut is an easy way to program your datalogger to measure the EE181 and assign datalogger wiring terminals Short Cut is available as a download on www campbellsci com and the ResourceDVD It is in...

Page 11: ...vices list select the Sensors Meteorological Relative Humidity Temperature EE181 Temperature and Relative Humidity Sensor folder Choose either constant power or panel switched power uses less current...

Page 12: ...r 7 If the sensor is connected to the datalogger as shown in the wiring diagram in step 4 check the output of the sensor in the datalogger support software data display to make sure it is making reaso...

Page 13: ...290 g 10 2 oz Housing Plastic material IP65 Filter 30 m pore size stainless steel mesh Power Consumption 1 2 mA at 12 V Supply Voltage using CSI cable 7 to 30 Vdc 12 Vdc recommended Start Up Time 2 s...

Page 14: ...5 0 015 RH reading RH Typical Long Term Stability 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 22 s Optional Teflon Filter 30 s The a...

Page 15: ...ded when Creating a program for a new datalogger installation Adding sensors to an existing datalogger program If your data acquisition requirements are simple you can probably create and maintain a d...

Page 16: ...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 ven...

Page 17: ...around three to four plates down from the top of the shield See FIGURE 7 1 FIGURE 7 1 EE181 Sensor Placement in a RAD10E Multi plate Shield Tools required for installing an EE181 sensor in a radiation...

Page 18: ...land until it firmly grips the body of the probe Use an adjustable wrench if necessary but do not overtighten the nut 7 3 1 2 Installation in an RM Young 41003 5 10 Plate Shield Do not mount the shiel...

Page 19: ...V terminal to conserve battery life When power is switched a two second warm up period is required This is programmed with the Delay instruction using 0 for the delay option 8 3 Long Cable Lengths Lon...

Page 20: ...page at the beginning of this manual for more information 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 analog input...

Page 21: ...r 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 EE181...

Page 22: ...iss 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 Meteor...

Page 23: ...ram and exit Short Cut Make note of the file name used when saving the Short Cut program 2 Open CRBasic Editor 3 Click File Open Assuming the default paths were used when Short Cut was installed navig...

Page 24: ......

Page 25: ...Terminal Red Power SW12 Yellow Temperature signal SE1 Blue Relative Humidity signal SE2 Black Power Ground Ground Symbol Clear Shield Ground Symbol Public AirTC Units AirTC C Public RH Units RH DataTa...

Page 26: ...ower SW12 1 Yellow Temperature signal U1 Blue Relative Humidity signal U2 Black Power Ground Ground Symbol Clear Shield Ground Symbol Public AirTC Units AirTC C Public RH Units RH DataTable Temp_RH Tr...

Page 27: ...hout causing a change absolute humidity For example for an air temperature of 20 C and a vapor pressure of 1 17 kPa the saturation vapor pressure is 2 34 kPa and the relative humidity is 50 If the air...

Page 28: ...e RH must be a fraction e_kPa e_Sat RH 100 CallTable Temp_RH NextScan EndProg CRBasic Example C 2 CR6 Program that Computes Vapor Pressure and Saturation Vapor Pressure Program measures EE181 with sin...

Page 29: ...ed water vapor 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 Organiz...

Page 30: ...Appendix C Absolute Humidity C 4...

Page 31: ......

Page 32: ...ua Apinag s nbr 2018 Perdizes CEP 01258 00 S o Paulo SP BRASIL www campbellsci com br vendas campbellsci com br Campbell Scientific Canada Corp 14532 131 Avenue NW Edmonton AB T5L 4X4 CANADA www campb...