Campbell ARG100 Instruction Manual
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Campbell ARG100 Instruction Manual

Tipping bucket rain gauge
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ARG100 Tipping
Bucket Rain Gauge
201
Copyright © 2014
Campbell Scientific (Canada) Corp.

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  • Page 1 ARG100 Tipping Bucket Rain Gauge Copyright © 2014 Campbell Scientific (Canada) Corp.
  • Page 4 PLEASE READ FIRST About this manual Please note that this manual was originally produced by Campbell Scientific Inc. (CSI) primarily for the US market. Some spellings, weights and measures may reflect this origin. Some useful conversion factors: Area: 1 in...

  • Page 5: Table Of Contents

    Table of 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. Description ..............1 2. Technical Specifications ........... 1 3. Installation and Siting ..........2 Choice of Site ..................
  • Page 6 Table of Contents Figures 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...

  • Page 7: 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. More information on gauge calibration is given in Section 7.

  • Page 8: Installation And Siting

    There are obvious advantages with this method, but it is not always practical. The body of the ARG100 has a profile which has been designed to reduce drag and turbulence and it can therefore be sited conventionally on exposed sites with some confidence.

  • Page 9: Levelling

    Use the internal bubble to check that the base of the gauge (with the funnel removed) is level; as an additional check, place a spirit level across the rim of the assembled ARG100. Wiring The rain gauge is supplied with custom cable length at the time of order.

  • Page 10: 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 11: Pulse Channel Example Programs

    ARG100 Tipping Bucket Rain Gauge Pulse Channel Example Programs The following example programs use a pulse channel to read the output from the precipitation gauge. The CR1000 example will also work with the CR800, CR850, CR3000, and CR5000. CR9000(X) programming is similar to the CR1000 except it has an additional parameter in the PulseCount instruction to specify the pulse module’s slot.

  • Page 12: Cr10(X) Example Program

    ARG100 Tipping Bucket Rain Gauge '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 5.1.3 CR10(X) Example Program ;{CR10X} *Table 1 Program 01: 1.0000 Execution Interval (seconds) 1: Pulse (P3)

  • Page 13: Control Port Example

    ARG100 Tipping Bucket Rain Gauge Control Port Example The following example programs use a control port to read the output from the precipitation gauge. The CR1000 example will also work with the CR800, CR850, and CR3000. The CR10X program will also work with the CR500, CR510, or CR23X.

  • Page 14: Cr10(X) Example Program

    ARG100 Tipping Bucket Rain Gauge 5.2.2 CR10(X) Example Program ;{CR10X} *Table 1 Program 01: 1 Execution Interval (seconds) 1: Pulse (P3) 1: 1 Reps 2: 8 Control Port 8 (switch closure only) ;Black wire connect to C8 3: 2 Switch Closure, All Counts...

  • Page 15: Calibration

    Calibration The sensitivity of the ARG100 is set at manufacture to approximately 0.2 mm/tip and each gauge is subsequently calibrated as described in Section 7.1. The calibration factor is given on a certificate and is also recorded on the inside of the rain gauge.

  • Page 16: Figure 7-1 Arrangement For Setting And Calibrating The Rain Gauge

    ARG100 Tipping Bucket Rain Gauge purposes. At the end of this period approximately 80 tips will have occurred. The exact number is obtained from the datalogger, together with a visual inspection of what fraction of a ‘tip’ is left in whichever bucket is still filling as the flow of water finishes.

  • Page 17: 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 18 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 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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