H-3401 SDI Rain Gauge
Contents
1. D31 0314 V 1 0 This guide is a brief overview of the H 3401 Tipping Bucket Rain Gauge and its basic features Please refer to waterlog com rain gauge or contact your sales representative for more information Updated manuals brochures and technical notes are available online For additional assistance please contact us at 1 435 753 2212 or sales waterlog com CONTENTS Whats in the BO ciel 2 El CU 3 Wire The Terminal Block 4 Install Your Rain Gauge eee 4 Program AAPP 5 Program Your Data Log EE 6 On site User Calbratton see 7 Adjust the Tipping Bucket Mechanism 8 Volume KN 8 gt c Gs x K Ss lt d t To SR E x A w lt CS N gt de A AS L e y v i d E N NS e i 9 y i Co A ISA Q A i d E d k 41 la gt H 0 TE k P N I gt e j j WEI y SE XI i A d j CN f AM K t P m5 so i eg NOW YOUR E KNOW YOUR RAIN GAUGE The WaterLOG H 3401 SDI is a Tipping Bucket Rain Gauge with built in SDI 12 electronics The SDI 12 feature converts a standard tipping bucket rain gauge into a smart SDI 12 sensor with additional capabilities The H 3401 SDI is easy to use works with any data recorder logger with an SDI 12 Interface and connects directly to any data recorder with an SDI 12 port It scales the bucket tips into units inches meters etc and provides built in accumulation of daily an2. rain gauge for more detailed instructions O LS Le S X O w The 3401SDI places five data values in its data buffer AA AAA BBB CC CCC DD DDD EE EEE Where AA AAA Rainfall accumulation since last measurement mm in of rain BB Number of raw bucket tips since last measurement counts CC CCC Total rainfall accumulation since reset mm in of rain DD DDD Total rainfall accumulation today mm in of rain FEE EEE Total rainfall accumulation yesterday mm in of rain All five of these parameters are automatically reset at power up or manually with the extended SDI 12 aXRA Reset Accumulators command NOTE There are also some additional measurement commands M1 MC1 C1 and CC1 that will return the following data AA AAA BBB CC CCC or AA AAA BBB CC CCC KKKK Where AA AAA Uncompensated rainfall accumulation since last measurement mm in of rain BB Number of raw bucket tips since last measurement counts CC CCC Uncompensated total rainfall accumulation since reset mm in of rain KKKK CRC Program SDI 12 The H 3401SDI comes from the factory with the following settings a xylem brand Program amp Calibrate CS amp Calibrate SDI Address U Slope 1 0 Daily Reset Time 00 00 00 Time of day 00 00 00 With these values the data will be in units of inches of rainfall The setup is stored in EEPROM within the 3401SDI and will not be lost if the power is disconnected The extende
3. If they are tight then don t loosen or adjust them until after the Rain Gauge has been tested If they are loose set them to the height listed below and then re tighten them Rain Gauges with 01 buckets set to 1 00 inch both sides Rain Gauges with 2mm buckets set to 1 08 inch both sides B Set the Rain Gauge on a platform or workbench and elevate it so that it sits 3 4 inches above the work surface You can also use a work surface with through holes in it place the Rain Gauge over the holes and run the hoses through the holes Use the bullseye level and wing nuts to level the Rain Gauge s main triangular plate C Connect the supplied hose to the barbed fittings on the bottom of the Rain Gage and then run each hose into a separate graduated cylinder Be sure the cylinders are empty and dry before starting the test PROGRAM amp CALIBRATE D If you want to perform a simplified balance test that does not require a PC or SDI 12 software you can do the following e Make sure the hoses are connected and running into separate 200 mL Graduated Cylinders e Insert the special bottle and fitting upside down into the rain gage bucket e Pour approximately 200ml of water into the bottle and let it run through the rain gage The exact amount of water is not important at this step because we are only checking the Rain Gauge bucket s balance side to side not the actual rain fall accuracy e Let all the water run through the bottle and rain g
4. age then carefully remove the white housing and tip the bucket once more to allow all the water to run out e Carefully check the amount of water in each of the graduated cylinders The should have nearly the same amount of water in each cylinder within 5 of each other Adjust The Tipping Bucket Mechanism Adjusting the tipping mechanism on the H 3401 consists of adjusting the stop posts to reduce or increase the volume of water the bucket can hold before it tios As the stop post rises the volume of water the bucket on the opposite side decreases 1 To adjust for too many tips need more rainfall volume lower the stop post on the opposite side of the bucket that is tipping too early Re lock the nut 2 To adjust for too few tips need less rainfall volume raise the stop post on the opposite side of the bucket that is tipping too late Re lock the nut 3 To adjust for equal amounts of water in each bucket use a pipet to put a set amount of water into each bucket ensuring the bucket tips with a specific volume of water in the bucket Adjust the stop post heights to ensure the buckets tip at the proper volume of water 0 01 8 24 mL 0 2mm 6 49 mL 0 1mm 3 24 mL Volume Test In this test a known amount of water is run through the Rain Gauge at a controlled rate The Rain Gauge will convert this into a Rain Fall readout in inches or millimeters depends on the model 8 a xylem brand Program amp Calibr
5. ate CS amp Calibrate The user will then perform their own calulation based on the formulas below Compare calculations to the Rain Gauge readings to see if they match 1 Reset the accumulator type OXRA in the command line of the Windows SDI Terminal 2 Hit the SDI DoltAll command and make sure it returns all Zeros This confirms the gauge reset 3 Run approximately 800mL to 1000mL of water through the Rain Gauge by pouring it into the special bucket You will have to fill the bucket several times because it won t hold 800mL at once 4 When you are done running the water through the Gauge remove the white cover and tip the bucket one more time to make sure it is empty Carefully measure the volume in the graduated cylinders and record it below under Volume ml 5 Calculate the amount of rain fall in or mm that the Volume ml equals based on the formulas at the bottom of the page Use the formula in or mm that corresponds to your Rain Gauge model and record it VolMeas in Inches Volume ml x 001214 VolMeas in Millimeter Volume ml x 030836 6 Hit the SDI DoltAll command in the Windows SDI Terminal and record the results below The readout should look similar to the diagram below Received gt 0 950 4 2 354 950 1 404 Received gt 0 todays reading number of tips total reading today s reading yesterday s reading 1 st Test Attempt test as many times as needed Rec
6. d commands for changing the slope and sensor address are described in detail in the user manual found on waterlog com rain gauge If more than one sensor is to be connected to the SDI 12 bus make certain each sensor has a unique sensor address In some cases the user may wish to preset the H 340 s Total Accumulation value to match the current rainfall of the water year The H 340 has an offset value stored in memory which is automatically added to the Total Accumulation value The offset value can be written or read with two extended SDI 12 commands aXWO and aXRO see Chapter 2 for details Please note both the Total Accumulation and Offset values are reset at power up or with the extended SDI 12 Reset Accumulators aXRA command To change the Total Accumulation to a new value you must first reset the accumulators with the aXRA command then set the offset with the aXWO command On Site User Calibration To calibrate your H 3401 SDI Rain Gauge on site follow the steps outlined below 1 You will first need to connect the gauge to your PC or Laptop To do this use the Rain Gauge SDI 12 output supplied cable and a Sidekick H 4191 to interface the Rain Gauge with a PC Laptop see the wiring diagram on page 4 2 Begin the wet testing start with a rough setup and balance check A Make sure the bucket stopper bolts are still tight These have been carefully adjusted at the factory and should not have come loose
7. d total rainfall The H 3401 SDI also provides mathematical correction for bucket volume errors due to varying rainfall rate What s in the Box When unpacking your H 3401 Rain Gauge make sure all the components ordered are received and undamaged from shipping The basic package includes the following Rain Gauge Main Unit 20 Cable AAA ae ary KEE CONNECT amp INSTA j X N Sr RW E L ES e Install Your Rain Gauge BE P d KR CONNECT amp INSTALL Wire The Terminal Block The H 3401 SDI Rain Gauge has a 6 pin WAGO wiring terminal block for connecting the data logger and power The terminal block has spring clamp terminals which work with both large and small wires and provide reliable long term connections To open the spring clamp to insert or remove a wire insert a small flat screwdriver blade in the square opening adjacent to the wire and twist or pry carefully to one side The image to the right shows a wiring diagram Words of Caution Keep the lead wires as short as possible Use shielded cables in noisy environments Install Your Rain Gauge Install the H 3401 SDI Rain Gauge 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
8. ord Rain gauge Time FCounts Tips Volume ml VolBucket Hit SDI DoltAll VolMeas mm Error 7 Compare the measurements Check to see that the amount of rain fall the Rain Gauge reported is the same as the amount that you measured and calculated They should be within 3 of each other using the formula below VolMeas VolBucket Error Fives 77 X 100 8 Make adjustments if needed Verify percent error is less than 3 e Gauge reads high decrease the tip speed 1 4 to 1 2 a turn clockwise at a time is recommended e If Gauge reads low raise the post to increase tip speed 1 4 to 1 2 a turn counterclockwise at a time is recommended If you are not comfortable making these adjustments return to the factory for calibration What Can Xylem Do For You Xylem alem 1 The tissue in plants that brings water upward from the roots 2 a leading global water technology company We re 12 900 people unified in a common purpose creating innovative solutions to meet our world s water needs Developing new technologies that will improve the way water is used conserved and re used in the future is central to our work We move treat analyze and return water to the environment and we help people use water efficiently in their homes buildings factories and farms In more than 150 countries we have strong long standing relationships with customers who know us for our powerful combination of leading product brand
9. s and applications expertise backed by a legacy of innovation For more information on how Xylem can help you go to www xyleminc com xylem Let s Solve Water Xylem WaterLOG 95 West 100 South Suite 150 Logan UT 84321 USA a xylem brand Tel 1 435 753 2212 Email sales waterlog com Internet www waterlog com 2014 Xylem Inc Item 360427 dwg 360427 February 2014 Rev C
10. three self leveling screws until the bulls eye level is centered To Bucket Switch Shield Ground SDI 12 Data SDI Connections 12 V Power Internal Cable ee ps L VK WAP i re j a li mc 9 J GR 4 MC g d S ep mie ma 4 L K gt K f T f AZA w y f DA XU d A e i A t 4 4 gt gt 1 ih i ms A c L H i gt H we 1 HL i i I D e y d t 4 1 4 i Ea M jt j V Ni i o S a y d i im i eil i Zei i d r H 2 r w m L KE oe IA L A N d e y d NE i I d lt be d A i i I i s ZE R y i ra b i a Ae I d A i E U Z lt A JJ PROGRAM CALIBRATE L co L o Program Youf Data Logger Program The H 3401 SDI Factory Calibration User Calibration Adjusting Tipping Mechan ms d S E N TS gt 4 R ans N j y PROGRAM amp CALIBRATE Program Your Data Logger You must prepare your data logger to receive and record the H 3401 SDI data Since data recorders differ widely refer to your recorder manufacturer s directions In general program the data recorder to input five values via the SDI 12 port Usually only one or two of the parameters is actually recorded Your data recorder must issue an aM command then collect the data with a aDO command refer to the user manual on waterlog com
Download Pdf Manuals
Related Search