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Summary of Contents for Campbell ARG100
- Page 1 ARG100 Tipping Bucket Raingauge User Guide Issued 30.11.10 © Copyright 1998-2010 Campbell Scientific Ltd. CSL 78...
- Page 3 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”...
- Page 5 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...
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Page 7: Table Of Contents
Bucket Gauge ............11 Appendix A. Optional RGB1 Levelling Baseplate ......A-1 Figures 1. Wiring Diagram for ARG100 ..............3 2. Arrangement for Setting and Calibrating the Raingauge ......10 A-1. Installation of RGB1 ................A-1 Tables 3-1. Wiring for Pulse Channel Input .............. 3 3-2. -
Page 9: Description
A two-core cable is used to connect the gauge to the datalogger where the switch closures are counted. The ARG100 is adjusted at manufacture to tip once for each 0.2 mm of rain (a sensitivity of 0.25 mm/tip is optional). More information on gauge calibration is given in Section 6. -
Page 10: Unpacking
If you need to mount the ARG100 on concrete, we recommend the use of Rawl- bolts. Alternatively, a concrete paving slab may be more convenient as a base, in which case through-bolts or screws are suitable. -
Page 11: Wiring To A Pulse Channel
When Short cut software is used to generate the datalogger program, the sensor should be wired to the channels shown on the wiring diagram created by Short Cut. The ARG100 is typically wired to a datalogger’s pulse channel (see Table 3-1). Table 3-1. Wiring for Pulse Channel Input CR800... -
Page 12: Wiring To A Control Port
This section is for users who write their own programs. A datalogger program to measure this sensor can be generated using Campbell Scientific’s Short Cut Program Builder software. You do not need to read this section to use Short Cut. -
Page 13: Cr1000 Example Program
Blk > P_SW Clr > ground 'Declare Variables and Units Public Rain_mm Units Rain_mm=mm 'Define Data Tables DataTable(Rain,True,-1) DataInterval(0,60,Min) Totalize(1,Rain_mm,0) EndTable 'Main Program BeginProg Scan(1,Sec) 'ARG100 Rain Gauge measurement Rain_mm: PulseCount(Rain_mm,P_SW,2,0,0.2,0) 'Call Data Tables and Store Data CallTable(Rain) NextScan EndProg... -
Page 14: Cr10X Example Program
ARG100 Tipping Bucket Raingauge 4.1.3 CR10X Example Program ;{CR10X} *Table 1 Program 01: 1.0000 Execution Interval (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... -
Page 15: Cr1000 Example Program
'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 (PTemp,_50Hz) Battery(BattV) 'ARG100 Rain Gauge measurement Rain_mm PulseCount(Rain_mm,1,14,2,0,0.2,0) 'Call Data Tables and Store Data CallTable(OneMin) CallTable(OneDay) NextScan EndProg... -
Page 16: Cr10X Example Program
Note that the plastic filter in the bottom of the funnel is not removable on the ARG100. 2. Check that the gauge is still level. It is surprisingly easy for an apparently immovable gauge to become tilted as a result of small ground movements, vandalism or just inquisitive fingers. -
Page 17: Calibration
6. Calibration The sensitivity of the ARG100 is set at manufacture to approximately 0.2 mm/tip (optionally 0.25 mm/tip) and each gauge is subsequently calibrated as described in Section 6.1. The calibration factor is given on a certificate and is also recorded on the inside of the raingauge. -
Page 18: Arrangement For Setting And Calibrating The Raingauge
This type of dynamic calibration gives repeatable results indoors, but it is not a true representation of the gauge’s sensitivity to natural precipitation. Useful results can be obtained by comparing the output from the ARG100 with the catches from a standard ‘Snowdon pattern’ gauge (HMSO, 1956) sited nearby; if... -
Page 19: Advantages And Limitations Of A Tipping Bucket Gauge
When the ARG100 is used primarily to measure rainfall rates, the resolution of the gauge may be too coarse to detect the significant changes in rate which nor- mally occur from minute to minute in moderately heavy rain. -
Page 21: Optional Rgb1 Levelling Baseplate
Appendix A. Optional RGB1 Levelling Baseplate The RGB1 levelling baseplate is only supplied with the ARG100 raingauge when specifically ordered. It is suitable for fast, semi-permanent installations on soft ground. Install the RGB1 as follows: Take the funnel assembly off the raingauge. - Page 23 ARG100 Tipping Bucket Raingauge The serial number and calibration factor for this gauge are as follows: (the serial number is also affixed to the gauge base and beneath the funnel) Serial No. _____________________________ Calibration Factor: _____________________________ Date: _____________________________ Signed: __________________________________________________________________...
- Page 26 CAMPBELL SCIENTIFIC COMPANIES Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES • www.campbellsci.com info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA • www.csafrica.co.za sales@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)
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