Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 91)

IM 11M12D01-01E 5-11
5. Wiring
If the ambient temperature at the detector installation site exceeds 80˚C, install a
terminal box and connect to the detector using 600 V silicon rubber insulated glass
braided wires. The distance between the detector and the terminal box should be
minimized.
To Detector #2
ZR22G / ZO21D
CH1 CH2
Detector #1
CH3 CH4
Shield
Averaging Converter
Terminal Box
Silicon Rubber Insulated Glass Braided Wire
Channel Card
CELL
TC
CJ
ϩ
Ϫ
ϩ
Ϫ
ϩ
Ϫ 1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1 2 3 4 5 6
Figure 5.10 Signal Wiring to Detectors (Using Terminal Box)
5.2.6 Ground Wiring of Detectors
Connect the ground wiring to the external ground terminal on the detector case or the
internal ground terminal. Follow the instructions below. The ground terminal screw is
M4.
(1) The ground resistance should be 100
Ω
or less (equivalent to Class D grounding).
(2) If the ambient temperature of the wiring installation exceeds 80˚C, use appropriate
heat resistant wires.
WARNING
The flange bolts alone do not provide durable grounding of the detector. Be sure to
grounded the ground terminal.