EML ARG314 User Manual
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EML ARG314 User Manual

Rain gauge
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ARG314 Rain Gauge
User Manual
UM-780-303-ARG314 Manual – V1.1

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Summary of Contents for EML ARG314

  • Page 1 ARG314 Rain Gauge User Manual UM-780-303-ARG314 Manual – V1.1...
  • Page 2 The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligation for EML towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of Sale.

  • Page 3: Table Of Contents

    Maintenance and Calibration ...................... 11 Basic Maintenance ..........................11 Calibration ............................12 Specifications ..........................13 Gauge Specifications ......................... 13 Cable Specifications (if fitted) ......................14 Appendix A – ARG314 products, accessories and spares ..............15 UM-780-303-ARG314 Manual – V1.1 P a g e...

  • Page 4: List Of Figures

    Figure 1 - Cable gland and cable (top left), levelling feet (top right) and blanking plug (bottom) ..7 Figure 2 – ARG314 Levelling Feet ......................8 Figure 3 – Rain gauge fitted to a pedestal as part of the EML system ........... 9 Figure 4 - Reed switch and resistor ......................9 Figure 5 - Filter and filter cap (left) / Nozzle delivering water into tipping bucket (right) ....

  • Page 5: General Information

    1. General Information About this Manual This manual is intended as a general guide for installing, wiring and using the ARG314 range of rain gauges. The information contained in this manual may not cover all aspects of ARG314 applications. Please refer to associated equipment manuals or consult papers and technical notes on the EML website (www.emltd.net).

  • Page 6: Introduction

    The ARG314 is EML’s recommended solution for many hydrological or meteorological applications such as weather stations and flood warning systems. The ARG314 is a versatile gauge suitable for climates with all types and intensities of rainfall. The injection moulded UV-stabilised material from which the gauge is made means that the ARG314 is an extremely robust and versatile instrument, ideal for applications where data precision and accuracy are critically important.

  • Page 7: Unpacking The Rain Gauge

    Unpacking the rain gauge 1) Included in the box: ARG314 Gauge, three levelling feet plus fixings (Figure 1 top right), cable gland and cable if ordered (Figure 1 top left) 2) Fit the three levelling feet as shown in Figure 2.

  • Page 8: Alternative Mounting Options

    There are options which can be used to mount the ARG314 above the ground. The ARG314 can be purchased with a rain gauge pedestal and guy kit or a rain gauge pedestal only. An example of this configuration is shown in Figure 3.

  • Page 9: Wiring Guidelines

    Figure 3 – Rain gauge fitted to a pedestal as part of the EML system 4. Wiring Guidelines This section gives information on the wiring of ARG314 rain gauge. For most applications, the rain gauge may be connected directly to a pulse counting input (contact closure) on a data logger, but some care is needed if long cables are used.

  • Page 10: Wiring For Internal Loggers

    The ARG314 includes a 2-way terminal for connection (the green terminal). As this is a contact closure (switch) device it does not matter which way you connect this to your logging device or counter.

  • Page 11: Maintenance And Calibration

    Figure 6 - Internal image of the ARG314 tipping bucket mechanism The exact calibration of each tip is pre-set by adjustable stops located under the tipping buckets. Do not alter these stops unless as part of a calibration exercise. A levelling bubble is provided as an aid to levelling of the rain gauge.

  • Page 12: Calibration

    PLEASE NOTE: A spares kit is available with filter, cap, and screws. Contact EML sales (sales@emltd.net) for more information.

  • Page 13: Specifications

    7. Specifications Gauge Specifications Table 3 - Gauge Specifications for ARG314 Technical Specifications Metric: 0.1mm or 0.2mm (0.5mm due Q3 2019) Resolution Imperial: 0.005 inch (0.01 inch due Q3 2019) WMO Compliant Contact Closure (Reed Switch) Output Dual reed switch upgrade available (due Q3 2019)

  • Page 14: Cable Specifications (If Fitted)

    Table 4 - Cable Specifications (if fitted) Technical Specifications Temperature Range -30°C to +70°C Overall diameter 4.6 mm 85  Char. impedance Capacitance/metre 154 pF Alpha 2401 Equivalents Belden 8761 UL style2092 UM-780-303-ARG314 Manual – V1.1 14 | P a g e...

  • Page 15: Appendix A - Arg314 Products, Accessories And Spares

    P-780-308 ARG314/L Rain gauge 0.5mm (Available in Q3) P-780-310 ARG314/STD (S) Siphon Rain gauge 0.1mm P-780-311 ARG314/EC (S) Siphon Rain gauge 0.1mm (inc. 6 metre cable) P-780-312 ARG314/L (S) Siphon Rain gauge 0.1mm P-780-313 ARG314/STD (S) Siphon Rain gauge 0.2mm P-780-314 ARG314/EC (S) Siphon Rain gauge 0.2mm (inc.

  • Page 16: Table 6 - Accessories And Spare Parts For The Arg314

    Table 6 - Accessories and spare parts for the ARG314 Product code Description P-780-321 ARG314 Spares Kit P-780-319 ARG314 Spares Kit Including Nozzle P-780-320 ARG314 Dual Switch Upgrade (Available Q3) P-780-333 ARG314 Funnel Assembly P-780-336 ARG314S Funnel Assembly P-780-350 ARG314 Calibration...

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