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INSTRUCTION MANUAL

ARG100 Tipping

Bucket Rain Gauge

"QSJM

201

Copyright © 2014

Campbell Scientific (Canada) Corp.

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Содержание ARG100

Страница 1: ...INSTRUCTION MANUAL ARG100 Tipping Bucket Rain Gauge QSJM 201 Copyright 2014 Campbell Scientific Canada Corp ...

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Страница 4: ...z ounce 28 35 g 1 lb pound weight 0 454 kg Pressure 1 psi lb in2 68 95 mb Volume 1 US gallon 3 785 litres In addition part ordering numbers may vary For example the CABLE5CBL is a CSI part number and known as a FIN5COND at Campbell Scientific Canada CSC CSC Technical Support will be pleased to assist with any questions About sensor wiring Please note that certain sensor configurations may require ...

Страница 5: ...3 4 Wiring 3 4 1 Wiring to a Pulse Channel 3 4 2 Wiring to a Control Port 4 5 Datalogger Programming 4 5 1 Pulse Channel Example Programs 5 5 1 1 CR1000 Example Program 5 5 1 2 CR200 X Series Example Program 5 5 1 3 CR10 X Example Program 6 5 2 Control Port Example 7 5 2 1 CR1000 Example Program 7 5 2 2 CR10 X Example Program 8 6 Maintenance 8 7 Calibration 9 7 1 Static Adjustment and Calibration ...

Страница 6: ...es Figure 4 1 Wiring Diagram from ARG100 3 Figure 7 1 Arrangement for Setting and Calibrating the Rain Gauge 10 Tables Table 4 1 Wiring for Pulse Channel Input 4 Table 4 2 Wiring for Control Port Input 4 Table 5 1 Multipliers 4 ...

Страница 7: ...ipping bucket arrangement is similar to most other gauges of this type precipitation is collected by the funnel and is passed to one of the two buckets situated at either end of a short balance arm The balance arm tips when the first bucket is full emptying this bucket and positioning the second under the funnel The tipping process repeats indefinitely as long as rain continues to fall with each t...

Страница 8: ...een designed to reduce drag and turbulence and it can therefore be sited conventionally on exposed sites with some confidence Further details on the exposure of rain gauges are given in HMSO 1956 1982 and by Rodda 1967 Another useful text on exposure and associated errors is Painter 1976 3 2 Unpacking Unpack the ARG100 carefully The tipping mechanism is immobilised before shipping to prevent damag...

Страница 9: ...e length at the time of order For most applications the ARG100 may be connected directly to a pulse counting input on the datalogger as shown in Figure 4 1 For a long cable a significant capacitance can exist between the conductors which discharges across the reed switch as it closes As well as shortening the life of the switch a voltage transient may be induced in any other wires which run close ...

Страница 10: ...escription CR800 CR1000 CR3000 CR500 CR510 CR10 X CR23X Black Signal Control Port C2 P3 Control Port Control Port White Signal Return 5 V 5 V 5 V 5 V Clear Shield G The CR10 does not support the use of control port inputs with the Pulse Count instruction 5 Datalogger Programming This section is for users who write their own programs A datalogger program to measure this sensor can be generated usin...

Страница 11: ...510 CR10 21X or CR23X CR7 programming is similar to the CR10X but has an additional parameter in the PulseCount instruction to specify the slot that the Pulse Card is in 5 1 1 CR1000 Example Program CR1000 ARG100 Tipping Public Rain_mm Units Rain_mm mm DataTable Rain True 1 DataInterval 0 60 Min 0 Totalize 1 Rain_mm FP2 0 EndTable BeginProg Scan 1 Sec 1 0 PulseCount Rain_mm 1 1 2 0 0 2 0 CallTable...

Страница 12: ...al seconds 1 Pulse P3 1 1 Reps 2 1 Pulse Channel 1 3 2 Switch Closure All Counts 4 3 Loc Rain_mm 5 0 2 Multiplier 6 0 Offset 2 If time is P92 1 0 Minutes Seconds into a 2 60 Interval same units as above 3 10 Set Output Flag High Flag 0 3 Set Active Storage Area P80 1 1 Final Storage Area 1 2 101 Array ID 4 Real Time P77 1 1220 Year Day Hour Minute midnight 2400 5 Totalize P72 1 1 Reps 2 3 Loc Rain...

Страница 13: ... Public Rain_mm Units BattV Volts Units Rain_mm mm DataTable OneMin True 1 DataInterval 0 1 Min 10 Totalize 1 Rain_mm FP2 False EndTable Define Data Tables DataTable OneDay True 1 DataInterval 0 1440 Min 10 Minimum 1 BattV FP2 False False Totalize 1 Rain_mm FP2 False ARG100 tipping bucket EndTable Main Program BeginProg Scan 5 Sec 1 0 Default Datalogger Battery Voltage measurement BattV PanelTemp ...

Страница 14: ...ze is used in the output section of the program to output the total rainfall over the output interval This section should be executed every scan and not placed in a subroutine or conditional statement 6 Maintenance To ensure reliable and accurate measurements we recommend that the following checks be carried out every month if possible 1 Inspect the funnel for any damage or blockage and check the ...

Страница 15: ...under the tipping buckets until the balance arm tips in response to the correct amount of water dripped from a burette or pipette 10 13 cm3 for 0 2 mm sensitivity 12 67 cm3 for 0 25 mm It is not possible to set the screws very precisely using this method but it should be done with as much care as possible It is obviously very important to ensure that both buckets tip in response to the same amount...

Страница 16: ... the flow of water finishes Shelf Support Bench Sink Figure 7 1 Arrangement for Setting and Calibrating the Rain Gauge If N is the number of tips together with the fractional part left in the one bucket the calibration factor CF is then CF 0 2 optionally 0 25 x 80 N For example if N 78 8 then CF 0 2 optionally 0 25 x 80 78 8 0 203 mm tip The amount of rainfall in any particular interval is obtaine...

Страница 17: ...nds to discrete quanta of rainfall and the accuracy and reproducibility of this quantum are determined not only by factors such as friction in the bearings etc but also by the rate of fill of the buckets When the rainfall rate is high a bucket may start to tip when the necessary volume of water has been collected but while the bucket is moving away from the funnel outlet an extra volume will have ...

Страница 18: ...ebaseplateflush with thebottom surface Tighten thenut up to thebaseplateto lock thestudsin position 4 Screw on thelower plastic thumb nutsand slidetheraingaugeover thestudsuntil it issitting on top of thethumb nuts 5 Completetheassembly asshown below for each stud 6 Fix thebaseplateto theground using thefour pegsprovided through thefour outer holes If forceisneeded removetheraingaugefirst fit theb...

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Страница 20: ...Campbell Scientific Canada Corp 14532 131 Avenue NW Edmonton AB T5L 4X4 780 454 2505 www campbellsci ca AUSTRALIA BRAZIL CANADA COSTA RICA FRANCE GERMANY SOUTH AFRICA SPAIN UNITED KINGDOM USA ...

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