Anemometer Cup Counter

The Anemometer-Cup is used for measuring the wind speed. The instrument has a Cup Wheel comprising of three Conical cups made from Copper sheet with bedded edges and free to rotate in a horizontal plane. The Cup Wheel spindle is connected by worm gearing to a revolution counter mounted inside a Water proof housing made from Gunmetal casting.

The gear ratio between the Cup and Counter is so chosen that the run of the wind is shown directly in Kilometers and tenths. The Counter mechanism has five figures and reads up to 9999.9 km. before repeating itself.

CUP	COPPER SHEET 0.71mm THICK
CUP ARM	BRASS
ARM SPROCKET	CAST GUN METAL
BODY & LID	CAST GUN METAL
CENTER SPINDLE	STAINLESS STEEL
WORM	MANGANESE BRONZE ALLOY
WORM WHEEL	HARD BRASS
OTHER PARTS	MADE FROM NON-RUSTING MATERIAL

CUP ROTOR ASSEMBLY :- Each of the three rotor cups have an internal Dia of exactly 127.0 mm and semi – conical in shape. The spindle is supported on two bearings. The assembly is made as per the instruction laid in IS:5912.

WORM & WORM WHEEL :- The worm & worm wheel are so designed that worms threads engage without friction to the worm wheel. The gearing ratio will be 32 revolutions of Cup produce one revolution of the worm wheel.

BODY & LID :- The body and the lid are made from Gunmetal casting and Glass window only viewing the five figure wheels of the counter.

COUNTER :- It is a non-reset, direct drive revolution mechanical counter adding one count for each one tenth revolution. The figures of the Counter will be 7mm high of white pigment colour on black background.

TESTS :- The instruments is tested for balance of cup assembly and frictionless movement is tested for “Spin Accuracy” as per IS:5912-1970 Section 7,7.1 and 7.2. The accuracy of the instrument is as per Section 7.0.