Tipping Bucket Rain Gauge Model H-340 Owner`s Manual
Contents
1. EXCEPT FOR THE EXPRESS WARRANTIES ABOVE DESIGN ANALYSIS SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE iv UNDER NO CIRCUMSTANCES WILL DESIGN ANALYSIS BE LIABLE FOR SPECIAL INCIDENTAL CONSEQUENTIAL INDIRECT OR ANY OTHER DAMAGES OR CLAIMS ARISING FROM THE USE OF THIS PRODUCT THIS INCLUDES LOSS OF PROFITS OR ANY OTHER COMMERCIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES IN NO EVENT WILL DESIGN ANALYSIS BE LIABLE FOR ANY CLAIMS LIABILITY OR DAMAGES ARISING FROM MODIFICATION MADE THEREIN OTHER THAN BY DESIGN ANALYSIS v Should the exclusive remedy stated in subparagraph 6 d 11 above be determined by a proper court of law to have failed of its essential purpose the limitation of the obligations of DESIGN ANALYSIS stated in subparagraphs 6 d 111 and iv shall remain valid vi THIS LIMITED WARRANTY GIVES USER SPECIFIC LEGAL RIGHTS USER MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS OR THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THOSE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY 6 BINDING AGREEMENT This is a binding agreement and if not understood USER should seek competent legal advice By paying for the PRODUCT and opening the package USER acknowledges to have read this Agreement and have agreed t2. Model H 340 Tipping Bucket Rain Gauge WATERLOG SERIES Owner s Manual Version 1 1 Design Analysis Associates 75 West 100 South Logan UT 84321 USA Phone 435 753 2212 Fax 435 753 7669 User Agreement WATERLOG Warranty 1 NATURE OF THE PRODUCT This agreement accompanies a pressure measuring system comprising micro coded circuitry and other electronic equipment sealed in an enclosed housing and packaged together with written instructional materials The packaged electronic circuitry and instructional materials herein are collectively referred to as the PRODUCT The PRODUCT is made available from DESIGN ANALYSIS ASSOCIATES INC of 75 West 100 South Logan Utah 84321 hereinafter referred to as DESIGN ANALYSIS and contains information and embodies technology that is confidential and proprietary to DESIGN ANALYSIS and the availability and use of the PRODUCT is extended to you the USER solely on the basis of the terms of agreement which follow 2 ACKNOWLEDGMENTS BY USER Opening the package which encloses the accompanying PRODUCT indicates your acceptance of the terms and conditions of this agreement and constitutes an acknowledgment by you of the confidential and proprietary nature of the rights of DESIGN ANALYSIS in the PRODUCT 3 DUTIES OF YOU THE USER In consideration for the access to and use of the PRODUCT extended to you by DESIGN ANALYSIS and to protect the confidential a
3. N A N N ES N N l 2 062 l Counter Weight lL Bucket Stop Do Not Adjust Figure 2 1 4 H 340 User manual VATERLO G H 340 Appendix A Specifications General Mechanical Resolution 0 01 Inches 4in hr Aperture 8 inch diameter funnel Rate 0 to 25 inches hour Diameter 8 inches Calibrated 8 237 mL tip 0 01in rainfall includes computer printout of conformance Height 12 inches Weight 8 pounds Magnetic Reed Switch Type Normally open Housing encapsulated reed Extruded aluminum tube Cast aluminum base Rating 200VDC max Anodized aluminum internal parts Stainless steel 0 1A max screws and fasteners Powder painted base funnel Contact Resistance 0 2 ohms and housing Mounting 3 stainless leveling screws with Output Connection adjustable aluminum feet Internal 2 position screw barrier strip bulls eye level Exit Ports Two screened drain tube fittings on Environmental bottom of casting Operating Temperature 0 to 60 C Warranty The WATERLOG H 340 is warranted against defects in materials and workmanship for one year from date of shipment e WATERLOG H 340 Appendix A Specifications A 1
4. at for a period of twelve months from the time of purchase the functions to be performed by the PRODUCT will be substantially in compliance with USER documentation DESIGN ANALYSIS also warrants that the PRODUCT will be free from defects in materials and workmanship for a period of ONE YEAR from the date of purchase b What USER Must Do If the product fails to satisfy the above warranty USER must notify DESIGN ANALYSIS in writing within the applicable period specified above and reasonably cooperate with the directions they received from DESIGN ANALYSIS c What DESIGN ANALYSIS Will Do DESIGN ANALYSIS will repair the PRODUCT or will endeavor to provide a replacement of same within a reasonable period of time In the event that DESIGN ANALYSIS is unable to make the necessary repairs or replacement within a reasonable period of time the original purchase price will be refunded upon the return of the PRODUCT to DESIGN ANALYSIS d Limitations 1 THIS LIMITED WARRANTY IS VOIDED WHERE THE SEALED HOUSING OF THE PRODUCT HAS BEEN OPENED ii THE ENTIRE REMEDY FOR BREACH OF THIS LIMITED WARRANTY SHALL BE LIMITED TO REPLACEMENT OF THE DEFECTIVE PRODUCT OR REFUNDING OF THE PURCHASE PRICE AS SET FORTH ABOVE IN NO EVENT WILL THE LIABILITY OF DESIGN ANALYSIS TO USER OR TO ANY OTHER PARTY EXCEED THE ORIGINAL PURCHASE PRICE OF THE PRODUCT REGARDLESS OF THE FORM OF THE CLAIM Wa e W 2 User Agreement WATERLOG Warranty ATER LOG H 340 iii
5. f water in each bucket This is due to the variation of distance the bucket center must travel after passing the bottom of the funnel Do not adjust the bucket stops in an attempt to balance the weight of the buckets Instead the H 340 provides an adjustable screw parallel to the buckets by which the bucket weight balance can be accomplished This eliminates the need to adjust the stops and compensates for any inequality of weight due to manufacture and assembly and gives equal travel to each bucket as the center passes the flow of water The counter weight underneath the bucket mechanism can be adjusted up or down to set the bucket volume tips unit rainfall See Figure 2 The up down counter weight adjust instructions in steps 1 and 2 may seem to be intuitively backwards however realize the center of gravity of the bucket and counterweight is above the pivot WaTERL G H 340 H 340 User Manual 1 3 1 To adjust for more tips more rainfall volume release nut 1 and turn weight counter clockwise down Re lock nut 1 2 To adjust for less tips less rainfall volume release nut 1 and turn weight clockwise up Re lock nut 1 3 To adjust for equal amounts of water in each bucket loosen set screw 2 turn adjusting screw toward the bucket with the most amount of water then re lock the setscrew 7 Set Screw al Balance Screw Ay Lock Nut 1
6. lf leveling screws until the bulls eye level is centered 1 4 Factory Calibration The H 340 is calibrated in the factory with an apparatus which provides a constant 4in hour flow rate The water exiting from the bottom of the rain gauge is captured in a precision graduated cylinder After 100 bucket tips or more have occurred the flow is stopped and the volume in the graduated cylinder is measured The procedure is as follows 1 2 H 340 User manual WATERLO G H 340 Empty the graduated cylinder Start the water flow into the funnel Wait until at least 100 bucket tips have occurred 1 resolution Stop the water flow Observe and record the water volume in the graduated cylinder Use the formula below to compute the actual rainfall in the graduated cylinder Calculate the rainfall measured by the rain gauge 0 Olinches x number of tips Compare the difference between these two values Adjust the counterweight as needed and repeat until the two values are identical or within an acceptable difference A oA la a a aoe The rainfall volume equation below converts the volume in the graduated cylinder mL into the equivalent rainfall in inches captured by an 8 inch diameter funnel SB TS te RAINFALLinotes 1OOOmL L NmLx 1 21405x10 inches m 4 0in 1 5 Adjusting the Tipping Bucket Mechanism Warning DO NOT ADJUST THE BUCKET STOPS Adjusting the stop posts causes a false reading of equal amounts o
7. nd proprietary information of DESIGN ANALYSIS USER agrees as follows a USER agrees that they will not open the sealed housing of the PRODUCT and that they will take all necessary precautions to prevent their employees agents sub contractors and resellers from doing so b USER agrees that they will not remove from the exterior of the housing of the PRODUCT any warnings against opening or notices of proprietary interest placed thereon by DESIGN ANALYSIS and that they will take all necessary precautions to prevent their employees agents sub contractors and resellers form removing such markings therefrom c USER agrees to treat the PRODUCT with the same degree of care as USER exercises in relation to their own confidential and proprietary information d USER agrees to return the PRODUCT to DESIGN ANALYSIS if and when the PRODUCT is deemed to be no longer of use In return therefore USER will receive from DESIGN ANALYSIS a redemption fee of 10 00 War ERLOG H 340 User Agreement WATERLOG Warranty W 1 4 TERM USER may enjoy these rights only as long as their possession of the PRODUCT shall continue to be rightful These rights will cease if the PRODUCT is returned to DESIGN ANALYSIS under the terms of any redemption offer warranty or money back guarantee or if USER transfers the PRODUCT to another party on terms inconsistent with this agreement 5 LIMITED WARRANTY a What is Covered DESIGN ANALYSIS warrants th
8. o be bound by its terms and conditions 7 GOVERNING LAW This Agreement and its validity and interpretation shall be governed by the laws of the State of Utah notwithstanding any choice of law rules of Utah or any other state or jurisdiction 8 U S GOVERNMENT RESTRICTED RIGHTS Use duplication or disclosure by the United States Government is subject to restrictions set forth in paragraph c 1 11 of the rights in Technical Data and Computer Software clause at 52 227 7013 The Contractor manufacturer is DESIGN ANALYSIS ASSOCIATES INC 75 West 100 South Logan Utah 84321 War ERLOG H 340 User Agreement WATERLOG Warranty W 3 Chapter 1 H 340 Operation 1 1 Introduction The WATERLOG H 340 is a rugged durable Tipping Bucket Rain Gauge The H 340 has the following features Switch closure output connects directly to a data logger Patented bucket tip mechanism is easy to adjust Removable stainless steel funnel screen Rustproof powder painted aluminum enclosure and cast base Side windows allow inspection of mechanism without removing cover No plastic parts All internal parts anodized aluminum or stainless steel 1 2 Theory of Operation The H 340 has an anodized aluminum tipping bucket mounted on precision stainless steel bearings The patented bucket tip mechanism allows easy calibration The gauge is factory calibrated to provide one tip per 0 01 inches of rainfall Tipping bucket rain gauges have a reputati
9. on for being inaccurate Inaccuracies can be caused by algae in the bucket evaporation and poor calibration The greatest source of inaccuracy however is the volume at which the tipping bucket mechanism tips is sensitive to rainfall rate This occurs because the water droplets cause small waves in the bucket and high rainfall rates cause superposition or pile up of extra water in the bucket before it actually tips over The following graph shows the relationship between bucket volume and rainfall rate of a typical tipping bucket In this example the bucket volume tip changes from 009 in tip to 013 in tip as the rainfall changes from 0 to 25 in hour The user should be aware of this inerrant inaccuracy in all simple tipping bucket rain gauges Realizing the non linearity of the mechanism it is important for the user to calibrate the rain gauge for the rainfall rates most common in the geographical area to be monitored WATERL G H 340 H 340 User Manual 1 1 Correlation Between Rate of Rain Versus Inches per Tip E pa v a Q lt o S 125 15 17 5 20 Inches of Rain per Hour Figure 1 Bucket tip mechanism sensitivity 1 3 Installation Install the H 340 in an open location where it will not be in the rain shadow of trees or buildings A rooftop location helps prevent vandalism and the accumulation of leaves and debris Bolt or screw the 3 mounting feet to the structure to prevent upset in high winds Adjust the three se
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