Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 67)

IM 11M13A01-02E 3-16
3.5 Installation of ZR40H Automatic Calibration Unit
WARNING
Automatic Calibration Unit (Model ZR40H) must not be located in hazardous area.
3.5.1 Location
The following should be taken into consideration:
(1) Easy access to the unit for checking and maintenance work.
(2) Near to the detector and the converter
(3) No corrosive gas.
(4) An ambient temperature of not more than 55
Њ 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 50A ) or
on a wall. It should be positioned vertically so that the flowmeter works correctly.
(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.
F3.13E.EPS
Figure 3.16 Pipe Mounting