Vaisala WAA151 Installation Manual download pdf (Page 109)

Chapter 4 ________________________________________________________________ Installation

VAISALA _______________________________________________________________________ 107

QSE101

A common application for the QSE101 shaft encoder is measuring

stream, lake, or tank level by using a float and pulley arrangement.

Use a threaded-shaft encoder with a supplied pulley. Figure 102 below

sketches an installation of the components with a stilling well.

1. Attach the pulley to the shaft.

2. Attach the incremental shaft encoder to a flat surface using bolts

or screws through the four holes in the two mounting flanges of

the housing. You can install the sensor in any orientation.

3. Then run a tape over the pulley that has a float attached to one

end and a counterweight on the other. Weights or other

mechanical loads at right angles to the shaft center line should

not exceed 4.5 kg. Larger loads increase the starting torque and

distort the bearings, decreasing the bearing life.

4. Protect the float from waves and currents by using a stilling

well.

5. Enclose everything in a gauge house.

0202-013

Figure 102 QSE101 Installation in a Stilling Well

1 2 ... 104 105 106 107 108 109 110 111 112 113 114 ... 132 133

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Vaisala WAA151 Installation Manual Page 109