C-5 SAM WEATHER COMMAND
Contents
1. plug the tip is and the ring is COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL 3 0 Operation As soon as the C 5 SAM unit is turned on it begins sampling it s weather sensors at a continuous rate of once per second The C 5 SAM processes both immediate and average weather data The data averages are a running five minute average calculated every 30 seconds At 30 second intervals the display will be updated to show the current weather conditions The first display update occurs five seconds after turning the unit on The data light on the front panel of the Display Controller box will turn on briefly when the data on the display is updated If the C 5 SAM unit has been out of operation for five minutes a value of 1 minus one in the wind stability field indicates the average data has not been calculated over a full five minute period You need a full 5 minutes to calculate a valid number for stability The data on the screen appears as follows Wind Speed Wind Direction Instantaneous a nsta a o i WS 120m s from 9 Wind Speed rT Ir 90m s e 25 o Stability TEMP 274 Temperature ID 102 N Relative Identification R Humidity Wind Speed WS 5 minute running average see details below in m s or mph Wind Direction 5 minute running average of direction wind is coming from in degrees or ordinal points N W SW etc See the table that translates ordinal2. C 5 SAM WEATHER COMMAND User s Manual 0302115001 Rev 00 August 14 1992 Coastal Environmental Systems 820 First Avenue South Seattle WA 98134 Telephone 206 682 6048 1 800 488 8291 Fax 206 682 5658 www coastalenvironmental com C 5 SAM WEATHER COMMAND USER MANUAL SOFIWARE NOTICE ALOHA Plume Dispersion Model ALOHA Version 5 2 1 contains a bug that will not allow interface with automatic data downloads from weather stations SAMs This bug was fixed in ALOHA Version 5 2 2 and 5 2 3 If you have Version 5 2 1 you can get a FREE download from the E P A website WWNW epa gov ceppo cameo COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL IMPORTANT NOTE The nose cone of the wind monitor is removed unscrewed for protection against damage during shipment Put the nose cone back by screwing it to the wind monitor body Since the nose cone has fine threads make sure when you put the nose cone back onto the wind monitor body it is not cross threaded COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL Wind Speed Wind Direction EM B instabtancous WS 120m s from 9 Wind Speed IW 90m s STAB 00 stability Temperature TEMP 274 C RH 34 ID 102 NS Relative Identification Humidity Display Controller Sensor Head AC DC Converter Data Cable to Line Power Wind Monitor Alignment H 5 Foo
3. ble of Magnetic Variances in some major Cities CITY MAGNETIC VARIATION BALTIMORE 10 W BOSTON 16 W CHICAGO 1 W CHARLESTON 15 W DALLAS 6 5 E DENVER 11 5 DETROIT 5 0 W HOUSTON 6 E KANSAS CITY 5 W LOS ANGELES 14 E MIAMI 3 W NEW ORLEANS 3 E NEW YORK 12 5 W PHOENIX 12 5 E PORTLAND OR 19 5 E SALT LAKE CITY 15 E SAN FRANCISCO 16 E SEATTLE 20 E ST LOUIS 2 E WASHINGTON D C 9 5 W ANTWERP 2 E COPENHAGEN 0 GENOA 1 E HAMBURG 1 E LISBON 7 E LONDON 5 E MADRID 5 E PARIS 3 5 E ROME 0 STOCKHOLM 2 W VIENNA 1 W ZURICH 1 E NOTE The above chart is for 1986 and the variation shifts slightly each year Consult your local airport weather service or a marine supply dealer for the current year magnetic variation for your location 12 COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048
4. e to the ALOHA dispersion model 2 Sensor Head This includes the air temperature sensor the wind monitor with propeller and propeller nut a sealed electronics housing and a data cable to go to the Display Controller box The electronics in the sensor head prevent radio and electronic noise from interfering with the data 3 Sighting compass This compass allows you to easily align the sensor head N arrow to TRUE North Failure to do this will result in incorrect data 4 Mounting platform optional There are portable tower or vehicle mount options COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL 2 0 Setup 24 Align the sensor head toward TRUE NORTH Unless you live in Madison Wisconsin or Birmingham Alabama when you hold up a compass it does not point to TRUE NORTH A compass points to MAGNETIC NORTH and you want C 5 SAM aligned to TRUE NORTH because that is how all maps are oriented The easiest way to align the sensor head with north is to use the sighting compass provided with the C 5 SAM 1 Determine the magnetic variation of the city where the C 5 SAM will be used your local airport or weather bureau can help A list of some major cities is provide in this manual Once you have determined the magnetic variation for your particular city say 20 E for Seattle or 5 W for Charleston then you must take this into account when sighting the compass 2 Hold the sighting compass at e
5. ead now BE SURE TO KEEP THE ARROW HEAD ALIGNED WITH YOUR NORTH REFERENCE If for some reason you move the C 5 SAM during its use you must keep it aimed constantly North Remember if you move C 5 SAM your reference point may no longer be due north of the new location If it is not possible to keep the North alignment while moving the C 5 SAM you must turn the C 5 SAM off and restart it when it is in the new position and again aimed TRUE NORTH 2 2 Connect all cables 1 2 The Display Controller box should be wall mounted or attached firmly to a base Route the data cable from the sensor head to the Display Controller box Attach the data cable to the Display Controller box via the 15 pin connector on side of the box Plug in the power supply then plug the power supply into a 110 outlet Plug in the cable from the sensor head A cable can be run from the Din Plug on the Display Controller to a Comm port of a computer For a MacIntosh computer a standard Din 8 cable can be used For a IBM P C type computer a cable can be purchased from your C 5 SAM dealer 23 Turn on power Turn on the power switch on the front of the Display Controller box The power light next to the switch comes on to indicate the C 5 SAM is on If you wish to connect the Display Controller directly to your vehicle or other power eliminate the power supply and wire in 9 12 volts DC minimum 300 milliamps directly to the controller On the power
6. points to degrees Instantaneous Exact wind speed during last one second before Wind Speed IW updating display See details below Stability STAB Value describing how much wind mixing is occurring within the wind direction See details below Temperature TEMP 5 minute running average of air temperature in C or F COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL Relative Humidity RH 5 minute running average in percentage Identification ID Your C 5 SAM unit identification assigned at the factory STABILITY Stability of the wind is the biggest determinant of how far plume will travel downwind Stability is measured by electronically checking where the vane is located every second Since the vane in normal wind is always moving the stability will never be zero unless you held the vane in place perfectly for 5 minutes Stability is the standard deviation of the wind direction and can range from 0 to about 120 As was discussed you will never see zero nor will you ever see 120 however a wind with a stability above 25 is a fairly unstable wind This is good if you have a spill because it means the plume will disperse more rapidly it will however be broader Bad news is a stability of 10 or less This means the air is not mixing much and the plume will travel much further For more precise downwind distances it is necessary to use a plume dispersion model which considers
7. t Telescopic Sections Mounting Brackets Van Mount 3 ee ee ee COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL 1 0 Description The C 5 SAM Weather Command is designed with the ruggedness and ease of use that has made the Weatherpak so popular C 5 SAM computes running averages of vector wind speed vector wind direction air temperature and stability of the wind This data along with the instantaneous measurements of wind speed direction and air temperature and optionally Relative Humidity are updated on the display screen every 30 seconds C 5 SAM can be used as a stand alone station independent of any computer or supporting electronics It can be used for routine monitoring or in conjunction with the ALOHA plume dispersion model With or without the dispersion model the data will allow you to estimate downwind travel time and distance locate potential impact areas and target your evacuation zone or identify it in pre planning practices List of Components 1 Display Controller Box The data is displayed in real time on a Liquid Crystal Display with and LED backlight The Display Controller contains the electronics for collection and display of the weather data It includes an AC DC converter to allow you to power the unit from line power A plug on the Display Controller allows you to input data directly into your computer for historical record keeping or to feed data in real tim
8. the exact chemical type all the weather conditions how much was spilled etc 5 MINUTE RUNNING AVERAGE A 5 minute running average of the wind will always be lower than what you think the wind speed will be This is because the wind usually comes in gusts and eddies creating high speeds interspersed with low speed areas It is not uncommon for people to guess the wind speed at about twice as high as the 5 minute average INSTANTANEOUS WIND SPEED This is the exact speed of the wind in the one second before the Display Controller updates the display IT IS NOT A GUST SPEED unless the gust is occurring at the exact second the reading is taken It is possible to have an instantaneous speed of 0 to 1 in an 8 MPH average wind it just happened to occur during that one second 10 COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL The above calculations have been determined by the US EPA NOAA and other agencies to be the best representation of the meteorological conditions that will most accurately reflect traveling distances and locations of hazardous vapors etc and still present the data in a timely manner Chart showing Ordinal compass points and degrees ORDINAL COMPASS POINT DEGREES N 0 OR 360 NE 45 E 90 SE 135 S 180 SW 225 WwW 270 NW 315 11 COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL Ta
9. ye level with your arm fully extended Be sure the sights in front and in back of the compass are lined up with your line of vision Turn your body or move your arm until you also have the compass N in line with the sights 3 Now compensate for the magnetic variation of your city For an EAST variation SUBTRACT for a WEST variation ADD the degrees to 360 NORTH If you are in Seattle you must subtract 20 Remember that on a compass 360 and 0 are both at North So move your arm until you can see approximately where 340 would be on the compass NOW your sight is aimed at TRUE NORTH 4 While holding your aim at TRUE NORTH select some non moving object in the distance a tree a pole a crack in a building as your north reference The north reference should be at least 100 feet away but the farther away the better COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL Line up sights on North reference object 15 E Magnetic Variation for Salt Lake City area COASTAL ENVIRONMENTAL SYSTEMS 206 682 6048 C 5 SAM WEATHER COMMAND USER MANUAL 5 Slip the sensor head on to whatever you are mounting it to portable tower vehicle mount or a permanently mounted pole Use the north indicator tab white plastic arrow head to aim the sensor head to your chosen north reference After north alignment tighten down the locking knob on the neck of the sensor head If you raise the sensor h
Download Pdf Manuals
Related Search