Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 88)

IM 11M13A01-02E 5-9
5. Wiring
(3) The size of the terminal screw threads is M3.5. Each cable should be terminated in
the corresponding size crimp-on terminals contact (*1) respectively.
*1 If the terminal box's surface temperature at the detector installation site exceeds
60
Њ C, use a “ bare crimp-on terminal”.
CAUTION
• Before opening the detector cover, loosen the lock screw. If the screw is not loosened
first, the screw will damage the cover, and the terminal box will require replacement.
When opening and closing the cover, remove any sand particles or dust to avoid
gouging the thread.
• Notice when closing the cover of the detector
After screwing the cover in the detector body, secure it with the lock screw.
Lock screw
Detector cover
F5.7E.EPS
Figure 5.7 Detector
5.3.3 Connection to Converter
To connect the wiring to the converter, proceed as follows:
(1) M4 screws are used for the terminals of the converter. Each cable should be termi-
nated in the corresponding size crimp-on terminals.
(2) When a rubber insulated glass braided wire is used for wiring to the detector, use a
terminal box. For wiring between the terminal box and the converter, basically use
cable, e.g., PVC sheathed PVC insulated cable rather than wire.
Note
The above is to prevent moisture or corrosive gas from entering the converter. Where
the ambient environment of the detector and the converter is well-maintained, it is
permissible to connect the wiring from the detector directly to the converter with
protection by conduits.
WARNING
This wiring is to carry power for the heater. Be careful to wire the correct terminals, and
be careful not to ground or short circuit terminals when wiring, as otherwise the
instrument may be damaged.