YOKOGAWA EXAxt ZR22G, User Manual, Page: 62 / 211

<3. Installation>
3-11
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
3.5 Installation of ZR40H Automatic Calibration
Unit
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.
n
Mounting of ZR40H Automatic Calibration Unit
The automatic calibration unit can be mounted either on a pipe (nominal JIS 50A ) 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.
Figure 3.17 Pipe Mounting
<Wall Mounting>
(1) Make a hole in the wall as illustrated in Figure 3.18.
223
140
F3-13E.ai
4 - Φ6.5 hole, or M6 screw
Unit : mm
Figure 3.18 Mounting holes
(2) Mount the automatic calibration unit. Remove the U-bolt from the automatic calibration unit
and attach the unit on the wall with four screws. When setting it with M5 bolts, use washers.