1、 Rain Collector IIInstallation manualThis instruction manual takes you step-by-step through the procedures required to install the Rain Collector II. The Rain Collector II is designed for use with any of Davis weather stations (with the exception of the Perception II Station). Each station can displ
2、ay rainfall in either inches or millimeters. Instructions for displaying rainfall on the Weather Wizard IIIand Weather Monitor IIare also included in this manual. ComponentsThe Rain Collector II includes the following components. Please make sure you have all listed components before continuing.Rain
3、 Collector with Cable The rain collector comes with the cone attached to the base and has a 40 (12m) cable. Four #8 x 3/4“ ScrewsDebris Screen This screen is placed into the rain collector cone to help prevent debris from clogging the funnel hole.Metric Rain Adapter This adapter adds weight to the t
4、ipping mechanism, adjusting it to tip for every 0.2 mm of rainfall instead of every 0.01”. 2Rain Collector Internal ComponentsThe illustration below shows the internal components of the rain collector, many of which are referenced in this manual.Rain Collector Internal Components3Tools and Materials
5、 NeededYou may need some of the following tools and materials to install the rain collector.Drill with 3/32“ (2 mm) drill bitMedium Phillips Screwdriver3/16“ (or 5 mm) WrenchCable Clips or Weather-Resistant Cable Ties with screw holes or other means for mount-ingBubble Level (standard versions only)
6、Insert the Optional Metric Measurement AdapterThe rain collector tipping bucket mechanism contains a standard measurement weight magnet that takes measurements in .01” for every tip of the bucket. The Weather Monitor II assembly contains a metric measurement that adjusts the tipping bucket mechanism
7、 so that it takes .2 mm metric measurements. To change the weight magnet:1. Find the metric measurement adapter included in the hardware.2. Locate the standard measurement weight magnet between the arms of the tipping mechanism.3. Open the arms slightly with one hand while pulling the magnet out wit
8、h the other hand.4. Separate an end cap from one side of the magnet.Open plastic tipping mechanism arms, pull out magnet45. Slide the magnet, with the exposed end of the magnet first, into the open slot of the metric measurement adapter.6. Insert the metric measurement adapter between the arms of th
9、e tipping bucket, with solid side of the metric measurement facing up. Although the rain collector is now ready to take accurate metric measurements, the console does not register the rain collector measurement weight has changed. The rain measurement type must be changed on the console. Rainfall Ca
10、libration NumberEach station uses a rainfall calibration number (CAL) to determine how much water each bucket tip (i.e., pulse) represents. Calibrated Rainfall= Number of pulses x (1/CAL)The default rainfall CAL of 100 works for the 0.01“ rain collector. If you have a 0.01“ rain collector you do not
11、 need to adjust CAL at all. Separate magnet from one end capInsert magnet with other end cap into metric measurement adapterOpen plastic arms to insert metric measurement adapter, with adapter in “V” positionTesting the Rain Collector II5If you install the metric adapter to your rain collector, firs
12、t adjust the console to display rainfall in millimeters and then change CAL to 0005. (To change CAL, press and hold the RAIN button until CAL appears on the display. Consult the station manual, if necessary, for further instructions.) Be aware that the console will revert to its default calibration
13、(i.e., inches) if it loses power. Note: Make sure you display rainfall in the appropriate units of measure before changing CAL; otherwise you will be setting the wrong calibration number. If, by mistake, you change CAL before switching to the appropriate units, you can rectify the error by switching
14、 to the appropriate units and then entering the appropriate CAL (for millimeters, 0005; for inches, 0100).Once the console is calibrated for 0.01“ (default) or 0.2 mm, you can switch the display units as often as you like; the console accurately converts rainfall amounts regardless of the type of ra
15、in collector you use.Caution to Pre-1994 Station OwnersIf you purchased a Monitor or Wizard station prior to 1994, it may be pre-calibrated for an earlier model rain collector. See “Calibration of Older Model Weather Stations” on page 9 for instructions.Testing the Rain Collector IIBefore installing
16、 the Rain Collector II, test the unit. If you are replacing a rain collector you previously installed, make a note of the total rainfall amount displayed. You may want to reenter this amount after you test the rain collector.1. Turn the rain collector upside down and remove the cone from the base by
17、 rotating the base until the latches on the cone line up with the latch openings in the base then lifting the base away from the cone.2. Carefully cut and remove the plastic tie which holds the bucket in place during ship-ping.3. Attach the rain collector cable to the appro-priate connector on the j
18、unction box.4. Consult your station manual or system installation manual.5. Press the appropriate key on your console as necessary to display daily rainfall.6. Press UNITS if necessary to display rainfall in the rain collectors native unit of measure.7. While watching the display on your console to
19、see if it changes, slowly tip the bucket until it drops to the opposite side. If the dis-play does not change, you may be tipping the bucket too quickly. Try again, more slowly this time.Remove the Cone from the BaseTesting the Rain Collector II6If the rainfall amount displayed on the console increa
20、ses by the expected increment (either 0.01“ or 0.2 mm) each time you tip the bucket, your rain collector is working properly. If the display changes only after you tip the bucket several times, the rain collector may be functioning correctly but you may have an older version of the station console.
21、See “Calibration of Older Model Weather Stations” on page 14 for details.Installing the Rain Collector IINote: Climbing on your roof may be hazardous. If you are uneasy about installing your unit please have a qual-ified professional complete the installation. Davis specifically disclaims any liabil
22、ity for injury or loss resulting from the installation or use of the Rain Collector II.Follow the instructions in this section to install your rain collector. Make sure you read “Choosing a Location for the Rain Collector” on page 5 as it contains important informa-tion concerning placement of the r
23、ain collector.Typical Weather Monitor II InstallationThe illustration below shows a typical rain collector installation for the Weather Wizard III and Weather Monitor II.Typical InstallationTesting the Rain Collector II7Choosing a Location for the Rain CollectorKeep the following in mind when choosi
24、ng a location for your rain collector:You must mount the Rain Collector II on a level surface. To make sure the surface is level, use a bubble level or pour water into the T-shaped leveling trough in the collector base and observe the surface of the water to ensure that the collector is level.Be sur
25、e there is an unobstructed path for water runoff from the drain screens.The Rain Collector II contains a magnet-operated switch which may not operate cor-rectly if you mount the rain collector on or near any object which attracts a magnet.To install the rain collector on a sheet metal roof, insulate
26、 the unit by making a platform out of wood. Mount the base of the rain collector at least 1“(4 cm) away from any steel or iron surface and make sure the reed switch is at least 1“ (4 cm) away from any steel or iron objects (e.g., nails).Choose a location which is easily accessible for normal cleanin
27、g and is distant from trees or other sources of heavy pollen or debris.Installing the Rain Collector II1. If you have not already done so, separate the cone from the base.2. If necessary, disconnect the rain collector cable from the junction box.3. Locate a suitable mounting surface, using the guide
28、lines above.4. Place the base on the mounting surface and mark the location of the four holes (the base has eight to choose from) you will use to secure the base.5. Make pilot holes using a 3/32“ (2 mm) drill bit. You should make the pilot holes about 1/2“ (12 mm) deep.6. Fasten the base to the moun
29、ting surface using the #8 x 3/4“ screws provided7. Attach the rain collector cable to the appropriate connector on the junction box.8. To be certain the rain collector is functioning properly after installa-tion, retest the unit as described “Testing the Rain Collector II” on page 2.9. Once you are
30、sure the unit is func-tioning properly, place the cone back onto the base by putting the latches on the cone into the latch openings in the base and rotating the cone clockwise until the latches “lock” into place.Fasten Base to Mounting SurfaceExtending Cable Runs8As you reattach the cone, make sure
31、 to run the cable to the cable slot in the base, or the cone will not fit snugly against the base.10.Place the debris screen, points down, into the cone. The screen prevents large bits of debris from blocking the funnel hole.11.To prevent fraying or cutting of the cable where it is exposed to weathe
32、r, it is impor-tant that you secure it so it doesnt whip about in the wind.Use cable clips or weather resistant cable ties to secure the cable. Place clips or ties approximately every 3 to 5 feet (1 to 1.6 m). Do not use metal staples or a staple gun to secure cables. Metal staplesespecially when in
33、stalled with a staple gunhave a tendency to cut the cables.Extending Cable RunsIf the cable length supplied with the rain collector is not long enough for your purposes, you may extend it. The maximum length of cable is 900 feet (270 m). Note that this length represents the total length from the rai
34、n collector to the console, including any length of cable from the junction box to the console. To extend the cable, purchase stan-dard 4-Conductor Extension Cables from Davis and connect them to the existing rain col-lector cable.Adjusting the Rain Collector IIThe Rain Collector II is calibrated at
35、 the factory so the bucket tips (and records rainfall) for each 0.01“ (or 0.2 mm if the metric adapter has been fitted) of rain. To adjust the calibration slightly, use a 3/16“ (or 5 mm) wrench to rotate the adjustment screws which are located underneath the bucket (see “Rain Collector Internal Comp
36、onents” on page 2). The adjustment guide embossed in the platform shows how far you must rotate both screws in turn to effect a 1% and a 2% change. Moving the screws in the positive (+) direction causes the bucket to tip more times (i.e. give a larger count) for a given amount of water.Note: Modify
37、both adjustment screws by the same amount.To check the accuracy of the rain collector, compare the Davis Rain Collector with a tube type rain gauge. Use a rain gauge with an aperture of at least 4 inches. Any smaller and the readings obtained may not be accurate. Place the tube type rain gauge direc
38、tly next to the Davis rain collector. Compare the totals on three storms. Based on this, develop an average for how far off the reading are. Adjust the screws to fine tune the reading for the next three storms if necessary. Note: Do not compare rainfall readings to reading obtained from television,
39、radio, newspapers, or neighbors readings. Such readings are not located in your specific environment and therefore are not an accurate measurement of the weather readings taking place in your surroundings. The rain collector is carefully tested at the factory to conform to the specifications listed
40、in the back of this manual.Adjustment GuideExtending Cable Runs9Maintaining the Rain Collector IIFor greatest accuracy, you should thoroughly clean the Rain Collector II at least once or twice a year.1. Disconnect the rain collector cable from the junction box.2. Separate the cone from the base.3. U
41、se warm soapy water and a soft cloth to clean pollen, dirt, and other debris from the cone, cone screens, and bucket.4. Use a pipe cleaner to clear the funnel hole in the cone and the drain screens in the base. When all parts are clean, rinse with clear water.5. Reattach the cone and replace the scr
42、een.6. Reconnect the rain collector cable to the junction box.Using the Rainfall FunctionThe instructions below explain how to display rainfall on the Weather Wizard III and Weather Monitor II. To Display Rainfall1. To display daily rainfall, press RAIN. The daily rainfall and the word RAIN display.
43、2. To display total rainfall, press RAIN again. The total rainfall and the words RAIN and TOTAL appear on the display.Total RainfallTo Change the Unit of Measure1. Press RAIN once or twice to select daily or total rainfall, as desired.2. Press UNITS. The amount shown changes from inches to millimete
44、rs (or vice versa) and the symbol in the display changes from IN to MM (or vice versa).3. To return to the original unit of measure, press UNITS again.Daily RainfallExtending Cable Runs10To Clear RainfallDaily and total rainfall are independent of each other. You must clear each register separately.
45、1. Press RAIN once or twice to select daily or total rainfall, as desired.2. Press CLEAR and hold it down.The display will flash several times and then the weather station clears rainfall.Daily Rainfall ClearedNote: Performing a “total clear” on the weather station does not clear rainfall.To Set Tot
46、al RainfallYou may enter a total rainfall amount to represent any rainfall which accumulated before you obtained the Rain Collector II:1. Press RAIN once or twice to select total rainfall.2. Use ENTER to set the total rainfall amount. See “Using the Enter Key” in the weather station manual.Calibrati
47、on of Older Model Weather Stations This information applies only to users of the Weather Wizard II-S, Weather Wizard III, and Weather Monitor II manufactured prior to April, 1993. To check if your station meets this criterion, press the RAIN button on the console. If, when set to inches, the display
48、 reads 0.0 (rather than 0.00), you have an older model station. Standard SettingWhen using the 0.01” setting of the Rain Collector II with an older model station, note that the station is pre-calibrated for an earlier model 0.1“ rain collector. To re-calibrate your station, first set the display to
49、inches, then change CAL to 0100. (See “Rainfall Cal-ibration Number” on page 2 and/or your station users manual for instructions on how to change CAL.) Be aware that the console will revert to its default calibration (i.e., 0.1“) if it loses power.Metric SettingWhen using the 0.2 mm setting of the Rain Collector II with an older model station, note that the station stores rainfall amounts in 0.2 mm increments but displays amounts rounded to the nearest whole millimeter. Note: Keep in mind when testing the rain collector with older weather stations that the display
