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Universal Current Meter

Description

The AKIM Universal Current Meter CM-32 is a measuring instrument to determine the flow velocity of water in open canals, rivers, streams, rivulets, pressure pipes, lakes, and the sea. For measuring flow velocities from 0,025 m/sec. to 12 m/sec. High accuracy Low starting speed of 0,025 m/sec. Application of absolutely and anti-corrosive materials. Made of stainless steel. Almost frictionless contact transmission Universal application on different fixing devices for use on rod or as cable suspended meter equipment. The reliable instrument approved by many years practical experience under hard conditions worldwide.

The AKIM Universal Current Meter is a measuring instruments to determine the flow velocity of water in open canals, rivers, sreams, rivulets, pressure pipes, lakes and the sea. For measuring flow velocity from 0,025 m/sec to 12 m/sec

Materbody:

Made of high-quality, noncorrosive chromium steel, the current meter can be used even under extreme conditions. The propeller is filled with oil and rotating in two special ball-bearings. The oil filling and a capillary seal protects against water entry. A base stop prevents the propeller from striking to the ground. Universal Application on different fixing devices for use on rod or as cable-suspended meter equipments, for use with AKIM single drum winches or cable way installation.

Contact Transmission:

The current meter propeller gets turned by the flow. A permanent magnet turning with the propeller actuates, once per revolution the built-in Reed Contact which is watertight under pressure. The pulse sequence is nearly proportional to water velocity in the measuring point.

Guiding Device (Rod):

This rod is manufactured from non-corrosive stainless chromium steel. 20 mm. dia., 2 m. long, 2 sections, graduation and numbering in cm. with ground stop.

Connection Cable:

3 m. long special cable.
Determination of Flow Velocity:
The exact relation between the number of propeller revolutions per second and the water velocity is determined by the equation:
v = k . n + ?
v = flow velocity (m/sec.)
k = hydraulic pitch of propeller (m) determined
by test runs in the modern hydraulic towing
canal.
n = number of propeller revolutions per second
? = meter constant (m/sec.) determined by test runs in the modern hydraulic towing canal.
Since among current meters there are mechanical differences in the propellers as well as in the bearings, constants k and ? are found by specific tests in the modern hydraulic towing canal (Certificated of Calibration DSI - TAKK).
If desired, the calibration equation (relation between n and v) can also be supplied with fully calculated value and complied in a table (Velocity table – TAKK).
 
Propeller No Propeller Size Max. Water
Velocity
(m / sec.)
Starting
Speed
(m / sec.)
Range of
Component
Effect
Material
1 100 mm dia 0,125 m pitch 5,0 0,025 ± 45º Metal
2 80 mm dia 0,50 m pitch 10,0 0,040 ± 5º Metal
3 125 mm dia 0,25 m pitch 12,0 0,025 ± 5º Metal
4 125 mm dia 0,30 m pitch 10,0 0,035 ± 5º Plastic
5 125 mm dia 0,25 m pitch 10,0 0,030 ± 15º Aluminium
6 80 mm dia 0,50 m pitch 5,0 0,035 ± 15º Aluminium
 
 
 
 
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