Model 8190 Motor Aspirated Radiation Shield User`s Manual
Contents
1. 20 NOISSINNSd IHL SV 03055 LAOHLIM SNOANY LUVd SO JIOHA NI 02507250 40 THE 5 Ra G30NdONdIe 0351 38 OL LON Si HUIM383H ANY 03501950 Vivd JHL LNGANDOC 2000 03140345 AVN SY 1930 3 LOL LEAVNG ava 5 WAONdd 100 0618 SOISLSIWITYNS NOSIO KS NOILVIOVG 3030 031 5 EF NOILWTIVISNI ana Wy 31 25 LON OG EGO SOO F XXX 2 1 SION ClO F SIINV TIGL RIV 203141935 35083410 553 1 340200 SIHL SINGANDOG 0 JHL GNJddY 1277 30 2 1 3125 X04 03001 3 35 438 0618 931 YSMOL gt SO i 13 1 5 IVANI G O61S 05 35 1 1 202 dvUls Jdid LAN SINN 3 8 51708 52. 9 45 YOLOW 0618 ee ee 0 434 100 0618 SYYN NOILONNPNOD NMYYXO SIHL ISN ONILNNOW 931 1 NMOG 5316 2 JHL 1Y 3d L 1200 631 218 2 HLM XIMOL OL 537842 355 05 5 118155044 SV MGMOL JHL WONS SV LNN LNNON 81108 NO SLAN LON OG 3OVSHNS IHL 14 99 14 1 WZ SZ L SI 0618 TSGOW CTSIHS OJLYHIdSY HOLOW OS JYVMOYVH ONILNNOW JHL TIVLSNI 1 1 305 G3ONIH 01 LNNON 2 Y3MOL 81 8 TICON ONISN N3HM E 5 JSIMY3HLO SSFINN SILON Oy TT NIAC 0103 GION Cay liser 452 20 20 99 0 0616 0616 91064 ate eee 619001 9192 x Sze OL szi 01 1108 0 2 5 8 eA 35 313 8 9 KESTA NSS JAS 4009 0618 SNOISIA allweatherinc All Weather Inc 1165 National Drive Sacramento CA 95818 Fax 916 928 1165 Phone 916 928 1000 Toll Free 800 824 5873 8190 001 Rev H ECO 0733 April 2006
3. s satisfaction to have been defective in material or workmanship at time of manufacture The claimant shall pay the cost of shipping any part or instrument to the Company If the Company determines the part to be defective in material or workmanship the Company shall prepay the cost of shipping the repaired instrument to the claimant Under no circumstances will the Company reimburse claimant for cost incurred in removing and or reinstalling replacement parts This warranty shall not apply to any Company products which have been subjected to misuse negligence or accident This warranty and the Company s obligation thereunder is in lieu of all other watranties express or implied including warranties of merchantability and fitness for a particular purpose consequential damages and all other obligations or liabilities No other person or organization is authorized to give any other warranty or to assume any additional obligation on the Company s behalf unless made in writing and signed by an authorized officer of the Company AMOS WARRANTY This equipment has been manufactured and will perform in accordance with requirements of FAA Advisory Circular 150 5220 16C Any defect in design materials or workmanship which may occur during proper and normal use during a period of 1 year from date of installation or a maximum of 2 years from shipment will be corrected by repair or replacement by All Weather Inc Page 6
4. Model 8190 Motor Aspirated Radiation Shield User s Manual allweatherinc All Weather Inc e 1165 National Drive Sacramento CA 95834 USA www allweatherinc com User s Manual 8190 Motor Aspirated Radiation Shield CONTENTS 1 INSTALLATION 8 0 2 4 2 4 2122 1 MARS INSTANAIOR 1 Probe removal and Installation 1 Determining the Type of Probe Mount 1 Removal Probe with Fixed 440144440 2 Installation Probe with Fixed 2 Removal Probe with Removable Mounting 2100665 3 Installation Probe with Removable Mounting 8 00 3 THEORY OF 4 CALIBRATION 4 4 5 ee eed 5 00 5 Annual Maintenance idee end 5 SPECIFICATIONS ipsa 5 5 AWOS WARRANTY 6 Page User s Manual 8190 Motor Aspira
5. e fan for noise that could be a sign of worn bearings Replace the fan if noise 15 evident or if the fan has failed e Check all mounting hardware for corrosion or looseness and repair or replace as required Annual Maintenance e Clean the exterior surfaces 01 the MARS with warm water and soap Repaint the exterior surfaces as required Check all cables for signs of wear or damage especially in areas with high velocity winds Check the fan for noise that could be a sign of worn bearings Replace the fan if noise 15 evident or if the fan has failed Check all mounting hardware for corrosion or looseness and repair or replace as required SPECIFICATIONS Operating temperature range 40 to 55 C Radiation error 0 5 F 12VDC and 1000 W m solar radiation Air flow 360 ft min 6 Fan life 70 000 hours 40 C Power 8 15 180mA 12V Size 42 L x 13 5 H 107 cm x 35 cm Weight 10 Ibs 4 6 kg Unless specified otherwise All Weather Inc the Company warrants its products to be free from defects in material and workmanship under normal use and service for one year from date of shipment subject to the following conditions a The obligation of the Company under this warranty is limited to repairing or replacing items or parts which have been returned to the Company and which upon Page 5 8190 Motor Aspirated Radiation Shield User s Manual b 4 examination are disclosed to the Company
6. ect the probe cable to the probe To simplify routing of the probe cable and installation of the probe in the vent tube feed a piece of string weighted at the end with a nut for example through the horizontal tube and down through the vent tube Tie the string to the probe cable and pull the string from the opposite end to guide the cable up through the vent tube and into the horizontal tube Form a loose loop of cable at the base of the probe and secure it with a cable tie so that the cable forms a U With the filter end of the probe pointing up grasp the loop of cable at the base of the probe and raise the probe up into the vent tube When you feel the probe make contact with the mount move it side to side as necessary until it slides into the mount opening Slide the probe into the mount until the bottom of the probe is 2 3 inches above the mouth of the MARS vent tube While holding the probe in place tighten the mounting screws just enough to secure the probe but do not overtighten Over tightening the screws will damage the probe Pull the remaining slack out of the cable keeping the cable as straight as possible Tighten the strain relief until the cable is securely sealed Route the cable down the tower in the most convenient manner Lace or strap the cable approximately every 12 inches Loose cables will rub against the tower in high winds and the cable insulation could be destroyed Use ultraviolet resistant cable ties tape
7. is is important to prevent electrical shock and to avoid damage to internal wiring as well as to the fan blades For AWOS installations refer to the Model 1190 DCP User s Manual for instructions in connecting the MARS and the Model 5190 D Temperature RH sensor 2 Connect the probe cable to the probe 3 Refer to Figure 1 Two mounting blocks used to position the probe inside the vent tube Slide the first mounting block over the probe and position it near the filter end of the probe With the Model 5190 D probe position the block so that the set screw is over the flattened notch in the probe case Tighten the set screw just enough Figure 1 to secure the probe but do not overtighten Over tightening the screws will damage the probe The mounting blocks serve only to position the probe in the center of the vent tube not to support it inside the tube Even with the set screws loose there is no danger of the probe dropping out of the MARS Slide the second mounting block over the probe and up until it 1s flush against the first Before tightening the set screw make sure that the mounting screw hole on the opposite side of the block is aligned with the mounting hole in the first block Tighten the set screws again being careful not to overtighten To simplify routing of the probe cable and installation of the probe in the vent tube feed a piece of string weighted at the end with a nut for example through the horizonta
8. l tube and down through the vent tube Tie the string to the probe cable and pull the string from the opposite end to guide the cable up through the vent tube and into the horizontal tube Form a loose loop of cable at the base of the probe and secure it with a cable tie so that the cable forms U MOUNTING SCREW HOLES SET SCREWS Page 3 8190 Motor Aspirated Radiation Shield User s Manual 8 With the filter end of the probe pointing up grasp the loop of cable at the base of the probe and raise the probe up into the vent tube Align the screw holes in the mounting blocks with the screw holes in the vent tube 9 Replace the two mounting screws to secure the probe mounting blocks inside the vent tube 10 Pull the remaining slack out of the cable keeping the cable as straight as possible 11 Tighten the strain relief until the cable is securely sealed 12 Route the cable down the tower in the most convenient manner Lace or strap the cable approximately every 12 inches Loose cables will rub against the tower in high winds and the cable insulation could be destroyed Use ultraviolet resistant cable ties tape or metal strapping Use caution to avoid damaging the outer jacket of the cable 13 Connect the sensor cable to the data collection unit For AWOS installations connect the sensor wires to the Data Collection Platform DCP as explained in the Model 1190 DCP User s Manual 14 Reapply power to the MARS and check to see
9. mounted in removable mounting blocks it will feel loose moving from side to side but will not move vertically Page 1 8190 Motor Aspirated Radiation Shield User s Manual Removal Probe with Fixed Mount When the temperature RH probe 15 installed in a fixed mount the probe can be removed simply by loosening the mounting screws 1 5 6 Disconnect power from the MARS This is important to prevent electrical shock and to avoid damage to internal wiring as well as to the fan blades For AWOS installations refer to the Model 1190 DCP User s Manual for instructions in connecting the MARS and the Model 5190 D Temperature RH sensor Tie a piece of string to the probe cable where it emerges from the strain relief Loosen the two mounting screws 3 4 turns each Be sure not to remove the screws completely Loosen the strain relief and holding onto the string grasp the probe near the bottom above where the cable joins the case Do not remove the probe by pulling the cable Remove the probe by pulling it gently down and out of the MARS Disconnect the cable from the probe Installation Probe with Fixed Mount 1 10 11 12 13 14 Disconnect power from the MARS This 15 important to prevent electrical shock and to avoid damage to internal wiring as well as to the fan blades For AWOS installations refer to the Model 1190 DCP User s Manual for instructions in connecting the MARS and the Model 5190 D Temperature RH sensor Conn
10. ng to instructions given in the manual for the particular instrument Check the MARS for insect activity cobwebs hornet s nests etc as well as birds nests and clean out any debris The exterior surfaces of the MARS should be free of dirt at all times to prevent internal heating of the probe Clean the surfaces regularly with warm water and soap Repaint the exterior surfaces as required During regular maintenance check the fan housing for signs of corrosion and clean and repair or replace as necessary The inside of the enclosure may also need to be cleaned of excessive dirt drawn in by the fan Page 4 User s Manual 8190 Motor Aspirated Radiation Shield Check all cables for signs of wear or damage especially in areas with high velocity winds Check all mounting hardware for corrosion or looseness and repair or replace as required A noisy fan be a sign of worn bearings Replace the fan when noise 15 evident PERIODIC MAINTENANCE Monthly Maintenance Check all cables for signs of wear or damage especially in areas with high velocity winds Check the fan for noise that could be a sign of worn bearings Replace the fan if noise 15 evident or if the fan has failed e Check the MARS for insect activity cobwebs hornet s nests etc as well as birds nests and clean out any debris Maintenance Check all cables for signs of wear or damage especially in areas with high velocity winds Check th
11. or metal strapping Use caution to avoid damaging the outer jacket of the cable Connect the sensor cable to the data collection unit For AWOS installations connect the sensor wires to the Data Collection Platform DCP as explained in the Model 1190 DCP User s Manual Reapply power to the MARS and check to see that the fan is rotating Check to ensure that all mounting hardware is securely fastened Verify sensor operation Page 2 User s Manual 8190 Motor Aspirated Radiation Shield Removal Probe with Removable Mounting Blocks When the temperature RH probe is installed in removable mounting blocks the blocks must be removed along with the probe 1 Disconnect power from the MARS This is important to prevent electrical shock and to avoid damage to internal wiring as well as to the fan blades For AWOS installations refer to the Model 1190 DCP User s Manual for instructions in connecting the MARS and the Model 5190 D Temperature RH sensor Tie a piece of string to the probe cable where it emerges from the strain relief Remove the two mounting screws holding the probe mounting blocks in place inside the vent tube Loosen the strain relief and holding onto the string lower the probe and mounting blocks out of the vent tube Disconnect the cable from the probe Remove the mounting blocks from the probe by loosening the two set screws Installation Probe with Removable Mounting Blocks 1 Disconnect power from the MARS Th
12. ted Radiation Shield INTRODUCTION The Model 8190 Motor Aspirated Radiation Shield MARS provides protected mounting for temperature and humidity probes shielding them from direct solar heating and precipitation contact The Model 8190 is a virtually maintenance free radiation shield constructed of heavy duty non corrosive polymer and featuring a reliable long life 12VDC fan for continuous aspiration It accommodates one probe a temperature probe a humidity probe or a combination temperature humidity probe All cable terminations to the MARS are made through weatherproof connectors mounted on the enclosure INSTALLATION amp CHECKOUT The MARS is designed for tower installations Mounting hardware is provided including mounting brackets and U bolts Consult All Weather Inc for other mounting options MARS INSTALLATION The MARS should be installed with the vent tube on the right side pointing down approximately five feet above the ground When installing on the Model 8518 A Foldover Tower mount to the hinged side of the tower Ensure that the sensor cable will reach the Data Collection Platform connector To install the MARS follow the steps below 1 Lift the MARS into position and attach the horizontal tube to the tower legs using the supplied mounting brackets and U bolts 2 Adjust the positions of the U bolts to give a level installation The vertical vent tube should be vertically level to prevent direct solar radiation from en
13. tering the tube 3 Fasten the U bolts securely being careful not to overtighten the horizontal tube s U bolt which could cause deformation of the tube PROBE REMOVAL AND INSTALLATION Two different probe mounting arrangements are found on the 8190 The first uses mounting blocks that are attached to the probe and so are removed along with the probe The second method allows the probe to be removed while leaving the mounting bracket in place The following sections explain how to remove and install probes into the MARS in either situation Determining the Type of Probe Mount When the temperature RH probe is installed in a fixed mount it is removed by simply loosening the mounting screws When the probe is installed in a removable block mount the entire mounting block assembly must be removed along with the probe To determine if the mount is fixed or removable follow the steps below 1 Disconnect power from the MARS This is important to prevent electrical shock and to avoid damage to internal wiring as well as to the fan blades For AWOS installations refer to the Model 1190 DCP User s Manual for instructions in connecting the MARS and the Model 5190 D Temperature RH sensor 2 The two probe mounting screws are located on the back of the MARS vent tube Loosen the two mounting screws 3 4 turns each Be sure not to remove the screws completely If a fixed mount is used the probe will come free when gently pulled from below If the probe is
14. that the fan is rotating Check to ensure that all mounting hardware is securely fastened Verify sensor operation Theory of Operation The MARS is designed to adequately ventilate a probe while at the same time shielding it from direct and reflected solar radiation and from direct moisture contact It is constructed of heavy duty polymer to limit thermal mass and thereby preventing radiant heating of temperature probes by the tubing Highly reflective white paint is applied to all exterior surfaces to reflect as much solar radiation as possible Air flow through the MARS 15 virtually free of any obstruction Spacing 15 selected to give maximum air flow and at the same time prevent direct solar contact with the probe Fresh air is forced through the MARS by a fan to allow measurement of actual air temperature The exhaust vent of the MARS 18 44 inches from and slightly higher than the vent tube intake Any heat developed by the fan motor or the shield itself will be exhausted away from the vent tube preventing this heat from re entering the MARS and being measured by the temperature probe CALIBRATION No calibration of the Model 8190 is required To ensure constant air flow rates periodic measurements of air flow can be made using hot wire anemometers MAINTENANCE Maintenance of the MARS 15 generally limited to periodic cleaning and occasional repainting of exterior surfaces Instruments housed inside the MARS should be maintained accordi
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