Yokogawa RAGN - Manual (Page 15)

<4. INSTALLATION>
4-1
IM 01R01B10-00E-E 2nd edition: November 01, 2011-00 All Rights Reserved. Copyright © 2011, Rota Yokogawa
4. Installation
4.1 General
Installation:
All packaging material must be removed. The transportation lock for the float must be removed.
The piping shall be flushed before installing the flowmeter. Piping must be dried for gas applications. Rota-
meters must be installed vertically. The flow direction is from bottom to top. Prevent the device from mechani-
cal stress and vibration by aligning and supporting the piping. Avoid large volumes of gas downstream and
upstream of the device, this can cause vibration due to compression. Install the On/Off valve downstream in order
to avoid
damage when opening the valve. In case of gas applications, increase the flow pressure slowly. Avoid pressure
surges and temperature shocks to the flowmeter at any time.
Refer to the pressure and temperature limits of the device. For flowmeters with limit switches please see
chapter 4.3, 4.4 and 4.5.
Further installation hints can be found in VDI/VDE 3513 sheet 3.
Commissioning:
When functioning properly, the float moves freely in the flow. With floats with notches this can be easily seen
by their rotation. If the float does not move, please check the installation.
The flow rate can be read directly from the scale on the tube. Refer to the scale mark to which the float adjusts
its top edge when reading.
Maintenance:
With common applications and normal operating conditions the device is maintenance free. In case of soiling
we recommend to clean the measuring tube by using a bottle brush and soap water. Make sure not to scratch
the measuring tube. If float or measuring tube show signs of wear and tear, we recommend replacing them.