4
2-5. Place of installation
To maintain the instrument’s performance and reliability for a long period, pay attention to
the following points when selecting a place of installation for the instrument.
2-5-1. Ambient temperature
(a) Select a place where temperature change is minimal.
(b) When it is unavoidable to install the instrument in a place where it is subjected to
radiation from a source of heat (such as the process plant itself), provide a heat insulator
and select a well ventilated location so that the ambient temperature of the instrument is
made as low as possible.
(c) If there is a possibility of the measured fluid freezing, provide a heat insulator or take
appropriate measures to prevent freezing.
2-5-2. Atmosphere
Avoid, as much as possible, installing the instrument in a corrosive atmosphere.
2-5-3. Vibration and shock
Select a place where the instrument is not subjected to mechanical vibration or shock.
2-6. Pressure application
Regarding application of pressures to the instrument, pay attention to the following items:
(1) The instrument is delivered with the clamping-bolts of the adaptor flanges untightened.
Be sure to tighten them before using the instrument.
(2) Never apply pressures higher than the rated pressures. (See "3-2 : Specifications" on page
3-2.)
(3) Be sure to completely release the pressures form the instrument before tightening or
loosening its clamping-bolts.
