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INSTRUCTION MANUAL

for

WIND DIRECTION TRANSMITTER

MODEL A70-DL0

DOCUMENT #1147 , Version K

Model A70-DL

__XX____ 360

Range ______ 540

Range

A75-302 Wind Vane

Track Mounted Transmitter

Содержание A70-DL0

Страница 1: ...1 INSTRUCTION MANUAL for WIND DIRECTION TRANSMITTER MODELA70 DL0 DOCUMENT 1147 Version K Model A70 DL __XX____ 360o Range ______ 540o Range A75 302 Wind Vane Track Mounted Transmitter...

Страница 2: ...he same wire pair Two wind direction ranges 0 360 o and 0 540 o are available The 540 o range is recom mended if a mechanical chart recorder will record wind direction This range reduces transitions f...

Страница 3: ...nics 1 Sensor See Separate Specs Loop Resistance Excit Voltage 9 X 50 ohms Max Temperature Range Electronics 0 o 60 o C standard 20 o 70 o C extended Sensor See Separate Specs Dimensions NEMA 12 Box 3...

Страница 4: ...verts the output voltage from the wind vane which is proportional to azimuth to a dc current The current varies linearly from 4 ma at zero degrees azimuth to 20 ma at 360 degrees azimuth The Transmitt...

Страница 5: ...5 Figure 5 Direction Vane Mounting Diagram...

Страница 6: ...6 Figure 6 Transmitter Connection Diagram...

Страница 7: ...7 Figure 7 MultipleTransmitters with One PowerSupply...

Страница 8: ...Excitation Voltage R V 10 Vdc X 50 The resistance of various gages of copper wire is given in Table 1 Table 1 Wire Gage Resistance in AWG Ohms per foot 12 0016 14 0026 16 0041 18 0065 20 0103 22 0165...

Страница 9: ...forty or fifty feet high a tower commonly used for TV antenna support consisting of concentric pieces oftubingapproximatelytenfeetlong guyedateach section issuitable Abovethisheightself supporting org...

Страница 10: ...10 Figure 9 Poor Wind Sensor Placement Over Vertical Wall Figure 10 NorthAlignment Mark...

Страница 11: ...bottom of the wind vane housing Attach the sensor cable to these studs being careful to tighten only the outer 4 hex nut to 3 inch pounds torque If the inner nut is loosened or the nuts are tightened...

Страница 12: ...rmula 2 Figure 11 Graph ofWind DirectionTransfer Function 360o Range 0 180 360 4 12 20 Loop Current in mA Wind Azimuth Degrees N E S W N 540 Degree Wind Direction Scale The wind direction may be deter...

Страница 13: ...0 0 4 1 2 2 0 Voltage Loop Current milliamperes ICING Under some conditions operation of the wind vane will be degraded by the presence of ice This most often occurs as the result of freezing rain The...

Страница 14: ...the wind direction gain WIND DIRECTION TRANSMITTER The adjustments may be sealed with electronic grade silicon rubber to prevent tampering by unauthorized personnel 1 Connect a jumper between terminal...

Страница 15: ...is fuel in the tank before replac ing the engine If the electronic equipment doesn t function verify that it has power and is turned on Systems containing parts which can be quickly interchanged are...

Страница 16: ...ion is open or the signal terminal is short circuited to the positive excitation terminal If the output is constantly just East of North then the positive excitation terminal is open or the signal ter...

Страница 17: ...resistance between the direction vane signal lead and either of the excitation terminals should be less than 10000 10K ohms If the resistance values differ radically from the above then the vane or t...

Страница 18: ...aced removed or otherwise changed d the damage has not been caused by acts of nature including windstorm and hail beyond those specified as within the range of operating conditions e the damage has no...

Страница 19: ...em 4 If the equipment is packaged in a plastic case wrapitinaluminumfoilorotherconductive material Thiswillprotectitfromstaticelectricity aswellaspreventthepackingmaterialfrom jammingmechanicalparts s...

Страница 20: ...20 WWW COMPTUS COM Phone 603 726 7500 Fax 603 726 7502...

Страница 21: ...1 Protective boot _______ 1 Instruction Manual _______ 2 Hose Clamps _______ 1 Certificate of Calibration _______ IMPORTANT Please check your order on receipt to be certain all listed accessories are...

Страница 22: ...22 WWW COMPTUS COM Phone 603 726 7500 Fax 603 726 7502...