YOKOGAWA ZR22S, User Manual

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<3. Installation>
3-15
IM 11M13A01-02E
3.5 Installation of ZR40H Automatic Calibration
Unit
CAUTION
Automatic Calibration Unit (Model ZR40H) must not be located in hazardous area.
3.5.1 Installation Location
The following should be taken into consideration:
(1) Easy access to the unit for checking and maintenance work.
(2) Near to the detector or the converter
(3) No corrosive gas.
(4) An ambient temperature of not more than 55 °C and little change of temperature.
(5) No vibration.
(6) Little exposure to rays of the sun or rain.
(7) Non-hazardous location.
3.5.2 Mounting of ZR40H Automatic Calibration Unit
The automatic calibration unit can be mounted either on a pipe (nominal JIS 50 A ) or on a wall.
It should be positioned vertically so that the flowmeter works correctly.
<Pipe Mounting>
(1) Prepare a vertical pipe of sufficient strength (nominal JIS 50A: O.D. 60.5 mm) for mounting
of automatic calibration unit. (The unit weights approximately 3.5 kg.)
(2) Mount the automatic calibration unit on the pipe by tightening the nuts with the U-bolt so that
the metal fitting is firmly attached to the pipe.
F03-16E.ai
Figure 3.18 Pipe Mounting