Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 184)

IM 11M13A01-02E 11-13
11. Inspection and Maintenance
11.3 Replacing Flow meter 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 flow meter, 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
Њ when reassembling. After tightening, do a liquid leakage test.
COM ON S N Z RO
F11.9E.eps
Bolt fixes bracket
Flow meter with back plate
Connecter
Fig. 11.9 Flow meter replacement