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Safety

 

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 instructions provided in product manuals.  Manuals are 
available at www.campbellsci.eu or by telep44(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 

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.

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.

Read all applicable instructions carefully and understand procedures thoroughly before beginning work.

Wear a hardhat and eye protection, and take other appropriate safety precautions while working on or

around tripods and towers.

Do not climb tripods or towers at any time, and prohibit climbing by other persons. Take reasonable

precautions to secure tripod and tower sites from trespassers.

Use only manufacturer recommended parts, materials, and tools.

Utility and Electrical 

You can be 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.

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).

Prior to performing site or installation work, inform all utility companies and have all underground utilities

marked.

Comply with all electrical codes.  Electrical equipment and related grounding devices should be installed

by a licensed and qualified electrician.

Elevated Work and Weather 

Exercise extreme caution when performing elevated work.

Use appropriate equipment and safety practices.

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.

Do not perform any work in inclement weather, including wind, rain, snow, lightning, etc.

Maintenance 

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.

Periodically (at least yearly) check electrical ground connections.

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. 

Summary of Contents for 4WPB100

Page 1: ...Revision 05 2020 Copyright 1996 2020 Campbell Scientific CSL I D 340 ...

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Page 3: ...s 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 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 De...

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Page 5: ...s 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 fo...

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Page 7: ...e beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit climbing by other persons Take reasonable precautions to secure tripod and tower sites from trespassers Use only manufacturer recommended parts materials and tools Utility and Electrical You can be kil...

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Page 9: ...ing examples 4 4 1 GRANITE 9 10 program example 5 4 2 GRANITE 6 CR6 program example 6 4 3 CR1000X program example 6 4 4 CR1000 program example 7 4 5 CR9000X program example 7 5 PRT in 4 wire half bridge 8 5 1 Excitation voltage 9 5 2 Calibrating a PRT 9 Table of Contents i ...

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Page 11: ...rs for 4 wire half bridge measurements of 100 Ω and 1 kΩ platinum resistance thermometer PRT respectively NOTE The GRANITE 6 and CR6 include the fixed resistor and current excitation required to complete the half bridge circuit without a terminal input module However the GRANITE 6 and CR6 are still compatible with a terminal input module and may be used with one should the application require it F...

Page 12: ...etion resistor Tolerance 25 C 0 01 Maximum temperature coefficient 0 8 ppm C Power rating 70 C 0 25 W EU certificate of conformity https s campbellsci ceu documents eu compliance eudoc_ terminal input modules pdf FIGURE 2 1 Circuit schematic 4WPB100 4WPB1K PRT Bridge Terminal Input Modules 2 ...

Page 13: ...erminals The excitation wire is connected to the VX1 terminal FIGURE 3 1 Wiring for example program The terminal spacing of the GRANITE 6 and GRANITE analogue input module is different than other data loggers The terminal input modules are still compatible but the pins must be gently bent inward a small amount to allow the terminal input module to be mounted It is still possible to use terminal in...

Page 14: ...ctions necessary to 1 make the measurement and 2 calculate the temperature The result of the half bridge measurement as shown is Rs R0 the input required for the PRT algorithm to calculate temperature If using a calibrated sensor the exact measurement of R0 will be known Use this value to increase the accuracy of the PRTCalc instruction by inserting the following equation between the BrHalf4W and ...

Page 15: ... Data Tables DataTable Hourly True 1 DataInterval 0 60 Min 10 Average 1 Temp_C_4wire IEEE4 False EndTable Main Program BeginProg Configure the VOLT 108 Module and assign it CPI address CPI_BUSA 1 CPIAddModule VOLT108 10 CPI_BUSA 1 Main Scan Scan 5 Sec 1 0 Half Bridge 4 wire measurements on the VOLT 108 CDM_BrHalf4W VOLT108 CPI_BUSA 1 Rs_R0 1 mV1000 mV1000 1 1 1 400 _ True True 500 60 1 0 PRT tempe...

Page 16: ...Hourly True 1 DataInterval 0 60 Min 0 Average 1 Temp_C IEEE4 0 EndTable BeginProg Scan 1 Sec 0 0 BrHalf4W Rs_R0 1 mV1000 mV1000 U1 U5 1 400 True True 0 250 1 0 0 PRTCalc Temp_C 1 Rs_R0 0 1 0 CallTable Hourly NextScan EndProg 4 3 CR1000X program example CRBasic Example 3 CR1000X 4 wire half bridge example CR1000X series data logger 4 wire half bridge Public Rs_R0 Temp_C DataTable Hourly True 1 Data...

Page 17: ...rue 0 250 1 0 0 PRTCalc Temp_C 1 Rs_R0 0 1 0 CallTable Hourly NextScan EndProg 4 5 CR9000X program example CRBasic Example 5 CR9000X 4 wire half bridge example CR9000X data logger 4 wire half bridge Public Rs_Ro Temp_F DataTable Temp_F 1 1 DataInterval 0 0 0 10 Sample 1 Temp_F FP2 EndTable BeginProg Scan 1 mSec 0 0 BrHalf4W Rs_Ro 1 mV1000 mV1000 4 1 5 7 1 400 True True 30 40 1 0 0 PRTCalc Temp_F 1...

Page 18: ...t to a minimum Because the fixed resistor Rf and the PRT Rs have approximately the same resistance the differential measurement of the voltage drop across the PRT can be made on the same range as the differential measurement of the voltage drop across Rf The result of the four wire half bridge Instruction is the voltage drop is equal to the current I times the resistance thus The PRTCalc instructi...

Page 19: ...00 Ω 125 Ω 100 Ω 3579 mV 4WPB1K Vx 0 35 mA 10 000 Ω 1250 Ω 1000 Ω 4290 mV Small variations in sensor resistance do not cause significant differences in the calculated maximum excitation voltage For example changing the sensor resistance to 84 Ω when used with the 4WPB100 reduces the maximum excitation from 3579 mV to 3564 mV 5 2 Calibrating a PRT The greatest source of error in a PRT is likely to ...

Page 20: ...multiplier 1 Place the PRT in an ice bath 0 C Rs R0 Read the result of the bridge measurement The reading is Rs Rf which is equal to R0 Rf since Rs R0 The correct value of the multiplier Rf R0 is the reciprocal of this reading For example if the initial reading is 0 9890 the correct multiplier is Rf R0 1 0 9890 1 0111 4WPB100 4WPB1K PRT Bridge Terminal Input Modules 10 ...

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Page 22: ...info campbellsci fr www campbellsci fr Germany Location Phone Email Website Bremen Germany 49 0 421 460974 0 info campbellsci de www campbellsci de India Location Phone Email Website New Delhi DL India 91 11 46500481 482 info campbellsci in www campbellsci in South Africa Location Phone Email Website Stellenbosch South Africa 27 21 8809960 sales campbellsci co za www campbellsci co za Spain Locati...

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