Omega Engineering RG-2500 User's Manual
Contents
1. 71131102 E RING 1 4IDX 210X 029 SS 72082102 SCRU 6 32 3 8 BIND HD SLOT SS 72084002 SCRU 1 4 20 5 8 BIND HD SLOT SS 72122003 SCRU 2 56X3 8 SOCKET HD SS 72146301 SCRU 8 32 3 16 SET SS 72148201 SCRU 1 4 20 1 4 SET SS 72188002 SCRU 10 32X1 2 BUTN HD SOCKT 55 72188003 SCRU 10 32X1 2 HEX WASHER HD SS 72211401 NUT 6 32 HEX SS 5 16 7 64 72225201 NUT 8 32 HEX SS 11 32X1 8 EET E 72246302 NUT ACORN 8 32 HEX SS 330 375 72300301 WASHER FLAT NO 10 SS 13 64X7 16X 031 72310502 WASHER FLAT 1 4 TEFLON 25X 50X 062 72341401 WASHER SPLIT 1 4 SS 255X 493X 062 5 9 9 8 P HH Q 2 N Y Q Q N N HP i i OY yA H HP H N E E PP ID Q Q S 72450601 STUD 6 32 2 SS 72450602 STUD 8 32 2 SS 72450603 STUD 10 32X1 1 2 ss 705 72600000 WRENCH ALLEN 1 8 e2. A100785 SCREEN 2 DIA SMALL FUNNELL o o 100786 SCREEN 7 5 8 LARGE FUNNEL 15 16 A x WARRANTY OMEGA warrants this unit to be free of defects in materials and workmanship and to give satisfac tory service for a period of 13 months from date of purchase OMEGA Warranty adds an addition al one 1 month grace period to the normal one 1 year product warranty to cover handling and shipping time This ensures that OMEGA s customers receive maximum coverage on each product If the unit should malfunction it must be returned to the factory for evaluation OMEGA s Customer Service Department will issue an Authorized Return AR number immediately upon phone or written request Upon examination by OMEGA if the unit is found to be defective it will be repaired or replaced at no charge However this WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of being damaged as a result of excessive corro sion or current heat moisture or vibration improper specification misapplication misuse or other operating conditions outside of OMEGA s control Components which wear or which are damaged by misuse are not warranted These include contact points fuses and triacs OMEGA is glad to offer suggestions on the use of its various products Nevertheless OMEGA only warrants that the parts manufactured by it will be as specified and
3. N o Tipping Bucket Rain Gauge i OMEGA Operator s Manual An Technologies Company OE OMEGA Am OMEGA Technologies Company Servicing USA and Canada Call OMEGA Toll Free USA Canada One Omega Drive Box 4047 976 Bergar Stamford CT 06907 0047 Laval Quebec H7L 5A1 Telephone 203 359 1660 Telephone 514 856 6928 FAX 203 359 7700 FAX 514 856 6886 Sales Service 1 800 826 6342 1 800 TC OMEGA Customer Service 1 800 622 2378 1 800 622 BEST Engineering Service 1 800 872 9436 1 800 USA WHEN TELEX 996404 EASYLINK 62968934 CABLE OMEGA Servicing Europe United Kingdom Sales and Distribution Center 25 Swannington Road Broughton Astley Leicestershire LE9 6TU England Telephone 44 1455 285520 FAX 44 1455 283912 I The OMEGA Complete Measurement and Control Handbooks amp Encyclopedias Temperature Data Acquisition Systems Pressure Strain amp Force Electric Heaters Flow and Level 1 Environmental Monitoring pH and Conductivity and Control Call for Your FREE Handbook Request Form Today 203 359 RUSH MSSO0395FVR1B w Unpacking Instructions Remove the Packing List and verify that you have received all equipment including the following quantities in parentheses RG 2500 Tipping Bucket
4. 2 2 Installation OMEGA rain gauges are shipped as a complete assembly with no additional assembly required The gauge however should be installed onto a platform or foundation that is fairly close to being level to minimize the amount of adjustment required after the gauge is mounted Each gauge is equipped with three mounting brackets that also serve as feet Each foot has a mounting hole with a diameter of 3 8 inches The holes in the feet should be matched to anchor bolts located in the foundation or on the platforms for severely tilted foundations use a set of three hex nuts on each bolt to provide leveling and locking of the rain gauge onto the foundation For slightly tilted foundations use the adjustable leveling knobs above each foot to level the gauge An internally mounted spirit level may be used to assist in the leveling process A rough level can be taken by placing a carpenter s level across the top of the gauge funnel Flat washers may be used as shims to help correct large leveling differences Place the shims under the mounting feet A lock washer and a hex nut should be used to secure the gauge onto the anchor bolts Some correction of the level may be necessary after tightening the hex nuts The leveling knobs located above the mounting feet are secured using allen head set screws These set screws must be loosened before the knobs can be moved The set screws are accessible from the sides of the base Re tighten the set screw
5. 7053 QNOD YA E 331133 NIVHIS OVE 15014 LAN X3H 43010H 3514 1352V38 Y3070H 5 9 MOLO3NNOO SOM 30VdS 6 3208 IVNINJ31 13971 SNINHVA OVA St 1V1SONWH3H1 NOILISOd O3LYIANI NI NMOHS 1335V18 IVISONYIHL JWOS OL LON ANIS LV3H 00343413 50 te 103 ONILVINSNI YAN IIS PARTS LIST TIPPING BUCKET RAIN GAUGE MODEL RG 2500 8 INCH ORIFICE 0 01 INCH PER TIP H NL P N DESCRIPTION 10000006 FUNNEL INNER 10000007 SHAFT BUCKET 10000008 FOOT LEVELING 10000009 KNOB LEVELING 10000011 BRACKET BUCKET 10000024 BUCKET 0 01 10000026 SCREEN 1 5 8 DRAIN TUBE 10000027 HOLDER MAGNET 3 8 DIA 10000028 COVER MAGNET ARM 10000029 TUBE COLLECTION 10000030 POST CALIBRATION SCREW 10000116 FUNNEL 8 ANODIZED 10000139 COVER 8 RAIN GAUGE 10000140 BASE 8 RAIN GAUGE 21051401 TERMINAL BLOCK 2 PIN 25000002 MAGNET 3 8 DIA 28000402 PLUG VENT 875 DIA BLACK 40803301 PLUG HOLE 5 8 DIA NYLON NATURAL 41900600 SPADE LUG 6 NYLON INSULATED 46311501 SURGE PROTECTION DIODE 51001802 SWITCH MAGNET 12 LEAD 64802001 LEVEL BUBBLE SPIRIT 71010000 BEARING 0 25 0 375 SS MINI
6. Rain Gauge 1 Operator s Manual 1 If you have any questions about the shipment please call the OMEGA Customer Service Department When you receive the shipment inspect the container and equipment for signs of damage Note any evidence of rough handling in transit Immediately report any damage to the shipping agent The carrier will not honor damage claims unless all shipping material is saved for inspection After examining and removing contents save packing material and carton in the event reshipment is necessary TABLE OF CONTENTS Chapter 1 Introduction es get acd d 1 1 General Description 1 2 Specifications Chapter 2 Installation AI t t rn 2 1 Site Requirements 2 2 Installation u IE ARA RS ae e d Chapter 3 Operation eee Chapter 4 Calibration etr 4 1 Factory Calibration hr e 4 2 Calibration Procedure 4 3 Field Calibration qux a A DET CRE VERSE 4 4 Adjustments EE yd eue bc t Chapter 5 Maintenance lee eher Chapter 6 Troubleshooting Chapter 1 Introduction 1 1 General Description The RG 2500 Series consists of two high quality rain g
7. l 35014 32018 IVNINYIL 4 09 1Y SN3dO 4 07 1Y 535019 LVISONYIHL 32 4475 6 40 Ava NOY A8 39V9 NIVY 8 INIMVYO NOISN3AIQ zuu 8313A31 HLM 1004 INILNNOA NH3LLVd 1334 ONILNNON 930 021 O 5214 VIO 6460 811066 NON Ru me 3999 NIVY ZI INNLNO H313A31 1004 INILNNON NYSLLVd 1334 ONILNNOW 930 021 Sd vid 6460 ICE 1335 __ 0060 39v9 NIVM HONI 8 AJBW3SSV 3SV8 x BONN 9NI13A31 3015 L3NDVN JO MIA 1004 INILNNON 3801 NOIL93NO9 M3YIS 5 28 1504 3405079 LOVLNOO 532018 IVNINWH31 104100 NOSIS 1VNOIS Nid Z AJHW3SSV 3SV8 3979 HON 13 9n8 TANNAJ H3NNI 8 211066 3099 NIVH HON ZI 39Y9 NIVY HONE 21 A18N3SSV 3SV8 INMILNO ANAJ 3015 L3NIVW 40 MIA 1004 INILNNOW HOLIMS 1333v8 JYNSOTD LIVLNOI IWNOIS 3801 NOLIITIOI rT HK 079 CARO M3M9S 1 5 2 1504 13M0n8 32018 IVNINY31 IVNSIS Nid Z T3NN D4 YANNI 1 39V9 NIVY 601166 NE 3999 NIVA Q31V3H HON ZI WWYOVIO INIM suu 5 LON 2 QNIH38 G3
8. 10102222 SYIANNN 1474 LAN ONIMOD3S 39V9 NIVY A18W3SSV 1108 INILNNON 22206 pepe A38W3SSV Ibi NOLLVTIVISNI 39Y9 5 H3HSVM 8 INN YOHONV MIA IVOIdAL NOILVGNNO4 LISIdS OL 9NIQMOOOV 13 31 SI 39v9 NIVY 1334 ONILNNON 39V9 NIVY JHL 30 1 NY 303 SLOAN INILSAPOV LH9I3H 13S zl S3HONI 0 ATLVWIXOMddV TIM Q3O0V3MHL JO HION31 WOIdAL NOILVONNO4 313N2NOO ONINNOd OL BAS ONNOYI 1H9I3H 1108 135 S3AV31 N33MOS ONIM JHL 40 3903 401 3HL JO HONI NIHLIM SI 39V9 NIVY JHL 40 3903 dOl 3HL LVHL OS f 5 ISNW LHOIGH SIHL N33349S XOuddV 315 ONISN SNOILVTIVLSNI 304 HOV3 33UHL IVOIdAL LAN LAN 91 6 10104224 YIHSVM YOHONV M3HSVM 1V14 8 20921621 39V9 NIV HON 21 Q30V3NHL 91 6 00000822 LAN INDISOA LAN 91 6 10102202 LAN IONILSAPOV LH9I3H LAN X3H 91 5 10102224 J3HSYAM 1 91 S ZOSZIEZZ 1003 39V9 30 NOILVIO1 YIHSVM 1W14 91 9 20841624 YIHSVM 5901 91 6 06622 INN 5 39vV9 NIVY INN X3H 91 5 10102222 SUIANNN LAVA 30 AT18WN3SSV 1108 INILNNON A ust 950106 ASSEMBLY RAIN GAUGE TIPPING BUCKET 8 E SUN Li QUY x kr 2 MM MT n rr V LLL 260000 Per 331V3H 28412313 3979 NIVY NOILVOIIILN3OI SLYVd 2530
9. 6 Chapter 2 Installation 2 1 Site Requirements The location of the rain gauge is very important to the successful operation of the instrument The most accurate measurements are made in relatively sheltered areas protected from gusting and turbulent winds Openings in orchards or a grove of trees offer the best exposure for the rain gauge Fences and other structures can help serve as a wind break as long as they are not too tall In areas that are open with no nearby structures a wind screen such is recommended to protect against wind effects Generally the heights of objects near a rain gauge should be proportional to the distance away from the gauge The distance of a nearby object should always be at least twice the height of the object above the gauge Wind effects on catch losses are more pronounced during snow storms than during a rain storm wind screen is generally not used at locations where snowfall constitutes less than 2096 of the mean annual precipitation Good locations do not always remain free of obstructions Vegetation can grow quickly changing an excellent exposure into a poor one Sites should be inspected regularly in order to properly maintain the exposure of the gauge In locations with heavy snowfall the gauge should be mounted on a support or tower to place the gauge well above the average local snow level The exposure would be best if the tower were to be located among trees of the same height as the tower
10. NOILISOd SI 30018 IWNIWYSL v S310N AI8N3SSV 3SV8 3979 NIVY 4313431 HLM 3015 LANOVW M3IA 1003 3015 30 MIA 3jounos OVA SI 3H SO 10 LOVLNOD 104100 95 433 9 MJA 11 3NoN _ 6 0 CCC0 6 on owo zwos 0062 3ovsn AT8WN3SSV NOLVTIVISNI 39V9 NIVY WOIdAL NOILVGNNO4 SH3JHSVM SLOAN 31349NO9 383 1 SNYOSLV Id N3000A 804 35 39V9 Q31V201 134371 318808 LIMIdS 3HL OL INIOYODIV 13A31 SI 39V9 el JHL 1334 39V9 JHL 30 33MHL Tlv 804 SLNN ONILSAPGV LHOIZH 13S E ecd S3HONI ATALVWIXOUddV 38 TIM 0084 0OJOVIYHL JO 31 1 NOILVONNO4 ALAYONOD OL 1108 135 S3AV31 4 5 QANIM 4 3H1 30 3903 401 3H1 40 HONI L NIHLIM SI 40 3903 301 JHL OS OJ1SAPOV 38 ISAW SIHL N3339S ANIM 31115 YALW Wve V 5 SNOLLWTIVISNI 404 INN 91 5 10102222 M3HSVM 1V14 8 20941624 qos Q30V3YHL 91 6 00000622 INN 9NDI201 10 91 S 10104224 LAN LHOI3H INN 91 S 10102221 M3HSVM 1V14 91 59 20841621 1003 39v9 40 NOILVOO M3HSVM 1V14 91 5 ZOSLIEZZ M3HSVM 3001 91 6 10819622 amp INN 91 S
11. able For example a quart of water is equal to 946 3 milliliters So for a 0 01 calibration the number of counts for a quart of water should be 946 3 8 24 114 8 4 4 Adjustments Should the calibration of the rain gauge appear to be incorrect and in need of adjustment change the heights of the two calibration posts adjustment screws To change the screw heights loosen the nut on the top of the post that locks the screw into place Rotate each screw by a small amount only and recheck the calibration for the new screw positions Empty all water from the buckets but do not dry off the buckets The exact amount of water needed for a single bucket tip may be added into a bucket to see how closely the calibration post screw may be to the position needed for the bucket to tip After obtaining this point of adjustment tighten down the locking nuts on the calibration posts screws and test the gauge using a large amount of water at the proper flow rate and count the total number of tips The calibration post screws should be adjusted upward whenever the amount of water needed to cause the bucket to tip is more than the amount shown in the calibration table Whenever i less water than the amount in the table causes the bucket to tip the screws need to be adjusted downward The two sides of the bucket assembly should generally be at about the same calibration adjustment There may be situations where one of the bucket calibration post screws has move
12. auges Models RG 2500 and RG 2500 12 Model RG 2500 features a standard eight inch diameter orifice while the Model RG 2500 12 has a twelve inch diameter orifice Both gauges have been designed with high grade materials and have been built to provide years of trouble free operation Each of the two gauges consists of a main collection funnel an outer cover an internal funnel a tipping bucket and magnetic switch assembly a base and mounting feet with leveling adjustments Electrically heated versions of both gauges can be provided for use in cold climates for measuring frozen precipitation such as snow and sleet The electrically heated versions include the features listed above plus a heater element a thermostat a fuse holder and fuse and associated wiring and terminal blocks The model numbers for the heated rain gauges are RG 2500E and RG 2500E 12 1 2 Specifications Capacity Unlimited Orifice RG 2500 8 20 cm RG 2500 12 12 30 cm Calibration 0 01 per tip 0 25 mm others on request Accuracy 190 for 1 to 3 inches per hour 390 for 0 to inches per hour Switch Magnetic reed SPST N O 10 Watts 200 Vdc 0 5 A max Dimensions RG 2500 8 x 17 RG 2500 12 12 x 20 Weight Shipping RG 2500 7 1bs 12 158 RG 2500 12 14 lbs 18 lbs Optional Accessories Wind Screen Alter Type Model RG 952 Event Recorder Drum Chart Model RG 6113 A Calibrator Bottle Model RG 2595 Digital Event Counter Model RG 259
13. ct and that the switch closes when the magnet passes over it Should the bucket motion appear to be sticky remove the bearings and inspect them for wear Annual replacement of the bearings may be necessary in areas where there are high amounts of rain Check the inlet funnel and funnel screens for blockage whenever the rain gauge operation appears to be low or missing Also inspect the drain tubes for debris that may interfere with the bucket motion Whenever the rain gauge output appears to be too high check to ensure that the gauge is still level and recheck the calibration 62 1 97E 000g JONVI NIVY 133908 SNIddl1 OINLINIVA HOIIMS OILVINIHOS quu S39nv9 NIVY GSLVSHNN 30 IVOIdAL SALON QNO23S 10 ANIL 340 0 19 WOIdAL NNWIXVWN 20 5 1 VGZ0 NAWIXVIN SLLVM 20 LZ ON L3NOVNW HOLIAS 30010 WOIdAL NOILOSLOYd 398NS A OZZ0 0 7300W 318 14 SZ N3dO ATIVWMON HOLIMS 2OILJNOVNW 512018 JV NIWH3L 0000 Lo N Zn m 191136 130089 9 133208 9Niddil YIMOd 331V3H OU VW3HOS 3uu OL Nivea 04504 4 SIVNIA33L s M SO LN ASS te Sco JHL YSASNSHM 00 8 IVNINWS3L NO SATIV 38 OVA SII ININIVM IVA 511 O M OOv 43LV3H 008 3914 1AS OMV 81 0303 IIMOA 14 SC et Fs RE Sum L3320S 2 015 CIL
14. d and is off more than the other screw In this situation the single tip amount of water calibration method may be better for correcting the one side of the bucket to match the other side more closely Do not dry the buckets during the adjustment procedure Carefully tighten the locking nuts on the calibration post screws after completing the adjustments Recheck the calibration to ensure that the screws have not shifted as the nuts were tightened Chapter 5 Maintenance Annual maintenance of the rain gauge is recommended Cleaning of the gauge more often may be necessary in areas where there is a lot of leaves dust and other debris that falls into the gauge Cleaning includes removal of the outer cover rinsing and drying off of the buckets cleaning of the drain holes and removal of debris from all of the screens the outer and inner funnels should also be rinsed and dried off to remove dirt dust and insects The gauge calibration should be tested during the maintenance procedure and adjusted if necessary If there is a regularly scheduled maintenance of the gauge on a monthly basis the calibration can be tested less often At least once a year or if possible after six months of heavy operation a drop of light machine oil should be placed onto the bearings Do not over oil and wipe off any excess oil The electrical output of the gauge should be tested to ensure that the magnet and switch assemblies are still functioning The switch u
15. e of Water RG 2500 0 01 8 24 ml RG 2500 0 05 41 20 ml RG 2500 0 2 mm 6 48 ml RG 2500 0 5 mm 16 215 ml RG 2500 12 0 01 18 53 ml RG 2500 12 0 2 mm 14 60 ml RG 2500 12 0 5 mm 36 48 ml Use a flow rate of 1 ml per second to avoid over filling of the buckets and loss of water due to splashing the desired accuracy is 3 of the volume at 1 to 6 inches of precipitation per hour Best results are obtained by taking a multiple of the volume of water and counting a number of tips For example the 0 01 calibration at 100 counts requires 824 milliliters of water 4 3 Field Calibration To verify the rain gauge calibration after the gauge has been installed best results may be obtained using the calibration bottle The bottle may be filled to the specified level and then placed into the funnel of the gauge While the bottle slowly empties the water into the funnel other tasks may be performed if necessary If the calibration bottle is not available use any calibrated measuring device and slowly pour the water into the gauge Keep track of the bucket tips either manually or through the use of the electronic monitoring equipment For field testing methods use an expected accuracy of 5 since the control of the methods is not as good as when the testing is done in the laboratory The total number of tips should equal the amount of water poured into the gauge divided by the calibrated number of tips per the number of milliliters of water shown in the t
16. free of defects OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHAT SOEVER EXPRESSED OR IMPLIED EXCEPT THAT OF TITLE AND ALL IMPLIED WAR RANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED LIMITATION OF LIABILITY The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order whether based on contract war ranty negligence indemnification strict liability or otherwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages Every precaution for accuracy has been taken in the preparation of this manual however OMEGA ENGINEERING INC neither assumes responsibility for any omissions or errors that may appear nor assumes liability for any damages that result from the use of the products in accordance with the information contained in the manual SPECIAL CONDITION Should this equipment be used in or with any nuclear installation or activity purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatso ever arising out of the use of the equipment in such a manner zm RETURN REQUESTS INQUIRIES Sim Direct all warranty and
17. ibration posts have screws that are adjusted until the correct number of counts are achieved with repeated testing The exact number of counts or nearly the exact number are recorded for each gauge As long as the number of counts is within the specified accuracy of the gauge the calibration will be accepted The calibration of the gauge should not change during shipping unless the gauge becomes damaged Checking of the gauge calibration may be made after the gauge has been installed to ensure the accuracy of the data 4 2 Calibration Procedure The rain gauge calibration may be checked using a graduated burette or cylinder Wet the gauge thoroughly allowing water to flow through the gauge before beginning the test The wetting of the gauge helps compensate for water that may adhere to portions of the gauge causing some error in the counts Allow a measured amount of water to flow into the gauge at a specified rate Refer to the table shown below The tipping bucket should begin tipping and will give the number of tips calculated The tips may be counted by listening to the bucket assembly and manually tabulating the count or by using the electronic monitoring equipment that is to be connected to the rain gauge during its normal operation Should the gauge appear to need adjustment make the adjustments in small increments and retest each change at least three times Standard Rain Gauge Calibration Table Model Number Tip Volum
18. repair requests inquiries to the OMEGA ENGINEERING Customer Service Department BEFORE RETURNING ANY PRODUCT S TO OMEGA PURCHASER MUST OBTAIN AN AUTHORIZED RETURN AR NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned AR number should then be marked on the outside of the return package and on any correspondence FOR WARRANTY RETURNS please have the FOR NON WARRANTY REPAIRS OR CALIBRA following information available BEFORE con TION consult OMEGA for current repair tacting OMEGA calibration charges Have the following infor 1 number under which the product was mation available BEFORE contacting OMEGA PURCHASED 1 number to cover the COST of the 2 Model and serial number of the product repair calibration under warranty and 2 Model and serial number of product and 3 Repair instructions and or specific prob 3 Repair instructions and or specific problems lems relative to the product relative to the product OMEGA s policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering OMEGA is a registered trademark of OMEGA ENGINEERING INC Copyright 1995 OMEGA ENGINEERING INC All rights reserved This documentation may not be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form in whole or in part without p
19. rior written consent of OMEGA ENGINEERING INC Where Do Find Everything Need for Process Measurement Course Thermocouple RTD amp Thermistor Probes Connectors Panels amp Assemblies Y Wire Thermocouple RTD amp Thermistor A Calibrators amp Ice Point References EF Recorders Controllers Process Monitors A Infrared Pyrometers PRESSURE STRAIN FORCE F Transducers Strain Gages 4 Load Cells amp Pressure Gauges Displacement Transducers Instrumentation amp Accessories FLOW LEVEL A Rotameters Gas Mass Flowmeters Flow Computers A Air Velocity Indicators Turbine Paddlewheel Systems A Totalizers amp Batch Controllers pr CONDUCTIVITY pH Electrodes Testers amp Accessories A Benchtop Laboratory Meters Controllers Calibrators Simulators amp Pumps Y Industrial pH amp Conductivity Equipment DATA ACQUISITION Y Data Acquisition and Engineering Software 4 Communications Based Acquisition Systems Plug in Cards for Apple IBM amp Compatibles Y Datalogging Systems Recorders Printers amp Plotters HEATERS 4 Heating Cable A Cartridge amp Strip Heaters Y Immersion amp Band Heaters A Flexible Heaters UY Laboratory Heaters ENVIRON YENS MONITORING AND CONTROL 4 Metering amp Control Instrumentation Refractometers Pumps amp Tubing Air Soil amp Water Monitor
20. s Industrial Water amp Wastewater Treatment pH Conductivity amp Dissolved Oxygen Instruments M2234 0395
21. s after leveling the gauge to help ensure that the level adjustment will not shift due to loose screws The gauge may be installed with the outer cover on or with it removed Three screws hold the outer cover in place Take out these three screws to remove the cover Carefully remove the cover avoiding hitting any of the internal rain gauge parts Some of the moving parts are tied down to prevent movement and possible damage during shipping Remove any tape plastic ties foam inserts or other objects used to keep the tipping buckets from moving The bucket assembly should move easily with the packing materials removed Chapter 3 Operation The rain gauge operation is relatively simple As rain is collected by the eight inch diameter orifice the rain drops are directed down through the funnel and into the bucket assembly As soon as the bucket has collected enough rain to represent 0 01 inches or 0 25 mm of rain the bucket tips The rain drains out through the drain collection tubes and the magnet is moved past the reed switch The reed switch closes momentarily making an electrical contact that is used in conjunction with electronic counting and recording instruments Chapter 4 Calibration 4 1 Factory Calibration Each rain gauge is thoroughly tested before being shipped to the customer measured amount of water is passed through the rain gauge to give an expected number of counts according to the diameter of the orifice The bucket cal
22. sed in the gauge is a momentary contact normally open single pole switch Test the switch using an ohmmeter buzzer or counter or by observing the data of the monitoring equipmen normally connected to the rain gauge Manually move the bucket assembly and look for the switch closure Upon completion of testing and cleaning of the gauge replace the outer cover and funnel and recheck the level of the gauge using a carpenter s level across the top of the gauge Adjust the leveling knobs at the mounting feet if the level is out of adjustment Replace or repair any of the gauge components that appear to be damaged or are not functioning properly The outer funnel should be replaced if the rim has become dented or bent Repaint the outer cover as needed Replace any hardware that is missing or has become rusted and corroded Inspect the signal and any power cables for signs of wear or damage that may expose the wires Replace the cables as needed Use wire ties to secure the cables to prevent damage from high winds For best results use conduit to protect the cables Chapter 6 Troubleshooting Failure of the rain gauge to operate usually is the result of loose wiring Inspect the cable connections to ensure the connections are solid and are correctly made Inspect the motion of the bucket assembly to ensure that the buckets move smoothly and without any interference Check the magnet to see that it passes over the switch without any physical conta
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