Liquid Controls Precision Turbine Flowmeters - Manual (Page 5)

B. PIPING
1. General Piping Considerations- As explained in the FORWARD, the fluid moving through the flowmeter engages
the angled blades of the turbine rotor. Thus the rotational velocity of the rotor is a function of the fluid velocity and
the blade angle engagement. Swirl present in the fluid ahead of the meter can change the effective angle of
engagement and, therefore, cause a deviation from the supplied calibration (done under controlled flow
conditions). Proper installation of the Flowmeter minimizes the harmful effects of fluid swirl.
2. The Meter Location- That section of the pipe immediately preceding, including, and following the flowmeter is
known as “THE METERING LOCATION”. Three typical metering arrangements are described in the following
section of this manual. Each is designed to minimize fluid swirl. A flowstraightener is also shown and should be
used where installation does not allow the otherwise straight run of pipe upstream of the meter. PLEASE NOTE:
The required lengths of pipe are given in pipe diameters and represent the minimum distances between piping
components that are recommended to eliminate flow disturbances.
3. Meter-By-Pass- Where possible, such as in a new piping system, it is advisable to include a valved by-pass around
the flowmeter. However, the by-pass connections are not to be placed within the recommended metering run.
4. Line Purge- In a newly installed piping system or one in which fittings have been disturbed, the line should be
flushed thoroughly prior to installing the instrument to minimize possible damage to the flowmeter from foreign
materials.
C. ELECTRICAL CONNECTION
The standard SPONSLER PRECISION TURBINE FLOWMETER pickup coil is designed to mate with an
MS310610SL-4S connector. A two-wire shielded cable should be used to lead from the connector to the electronic
instrument in use. The cable shield is connected (grounded) to the appropriate connector on the display unit ONLY,
in order to minimize ground-loop and interface difficulties. The connection cable should be located away from power
lines whenever possible.
Precautions should be taken when removing or installing the pickup coil. Any physical damage such as bent
threads or twisted leads are not covered by SPONSLER CO., INC warranty.
D. ASSEMBLY NOTES
1. Removal of internals should be performed in a clean area.
2. Ensure that internals are clean and dry before reassembling.
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