Manual
<2. PRECAUTIONS>
2-1
IM 01R01B30-00E-E 5th edition January 01, 2013 -00
All Rights Reserved. Copyright © 2003, Rota Yokogawa
2. Precautions
2.1 Transportation and Storage
Before transporting the unit, it is recommended to x the oat with a card-board strip in the same way as
when shipped from factory. Prevent foreign objects from entering the tube (e.g. by covering openings).
To protect the unit and especially the tube’s interior from soiling, store it only at clean and dry locations
2.2 Installation
Ambient temperature and humidity of the installation location must not exceed the specied ranges. Avoid
locations in corrosive environments. If such environments are unavoidable, ensure sufficient ventilation.
Although the RAKD features a very solid construction, the instrument should not be exposed to strong
vibration or impact stress.
Please note that the RAKD is magnetic sensing system can be inuenced by external inhomogeneous
magnetic elds (such as solenoid valves). Alternating magnetic elds (≥ 10Hz) as well as homogeneous,
static magnetic elds (in the area of the RAKD), like the geomagnetic eld have no inuence. Asymmetric
ferromagnetic bodies of considerable mass (e.g. steel girders) should be kept at a distance of at least 250 mm
from the RAKD.
To avoid interference, the distance between two adjacent RAKDs must be at least 120 mm.
Do not expose the unit to pressures higher than the indicated maximum operating pressure (refer to
specications)
Make sure that wetted parts are resistant against the process medium.
Ambient- and process-temperature may exceed specied maximum values. Note the temperature curves in
g. 2-1 and chapter 7 "Technical data".
The Rotameter must be mounted vertically. The ow direction is upwards.
Fig. 2-1. For option /KS1or /KN1 (Ex-version) the maximum values for ambient and process temperature
according to the respective temperature class mentioned in g. 3-2 and tables 7-2 to 7-5 must
be regarded. The minimum ambient temperature is -25°C.
50 55 60 65 70
75
100
200
Illustration of maximum allowable operation temperature depending on
ambient temperature for Rotameter type RAKD
Max. operation temperature [°C]
Ambient temperatur [°C]
75 80
125
150
175
225
250
275
Version without valve Version with valve
F21.EPS