Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 183)

IM 11M12A01-03E 11-11
11. Inspection and Maintenance
11.3 Replacing Flowmeter in ZR40H Autocalibration Unit
(1) Remove piping and wiring, and remove the ZR40H from the 2B pipe or wall
mounting.
(2) Remove four M6 bolts between brackets.
(3) Remove piping extension
(4) Remove bolts holding flowmeter, and replace it. A white back plate (to make the
float easy to see) is attached. The end of the pin holding down the back plate must
be on the bracket side.
(5) Replace piping, and fix M6 bolts between brackets. *1
*1 : When disassembling and reassembling, mark original positions, and tighten an extra
5-10
°
when reassembling. After tightening, do a liquid leakage test.
COM ON S N Z RO
F11.7E.eps
Bolt fixes bracket
Flowmeter with back plate
Connecter
Figure 11.8 Flowmeter replacement