Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer - Manual (Page 32)

IM 12J05C01-01E
3-1. Installation and dimensions
3-1-1. Installation site
The EXA transmitter is weatherproof and can be installed
inside or outside. It should, however, be installed as
close as possible to the sensor to avoid long cable runs
between sensor and transmitter. In any case, the cable
length should not exceed 30 mtr (100 feet).
Select an installation site where:
• Mechanical vibrations and shocks are negligible
• No relay/power switches or RF transmitters are in
the direct environment
• Access is possible to the cable glands (figure 3-1)
• The transmitter is not mounted in direct sunlight or
severe weather conditions
• Maintenance procedures are possible (avoiding
corrosive environments)
The ambient temperature and humidity of the instal-
lation environment must be within the limits of the
instrument specifications. (See chapter 2).
When the instrument with Suffix Code "-B,-N,-D" is
used, take measures so that the display window is
not exposed to direct sunlight.
3-1-2. Mounting methods
Refer to figures 3-2 and 3-3. Note that the EXA
transmitter has universal mounting capabilities:
• Panel mounting using optinal bracket, refer to Fig.
3-2a.
• Panel mounting using two (2) self-tapping screws,
refer to Fig. 3-2b.
• Surface mounting on a plate
(using bolts from the back)
• Wall mounting on a bracket
(for example, on a solid wall)
• Pipe mounting using a bracket on a horizontal or
vertical pipe (Nominal pipe diameter 50 A)
3. INSTALLATION AND WIRING
Figure 3-1. Housing dimensions and layout of glands
3-1 Installation and Wiring
162
202
155
180
30
77
50
42
68
115
130
56±0.2
Hood (Option)
Option code : / H
□
Grounding terminal
(M4 screw)
Transmission signal cable inlet
Cable gland : Pg13.5
Sensor cable inlet
cable gland (Pg13.5)
M6 screw (32 )
1.eps
9
34
(7.95)
(6.4) (6.1)
(7)
(2)
(5.1)
(1.2)
(3)
(4.5)
(1.65)
(2.7)
(0.35)
(1.26) depth
(1.3)
(2.20)
1 to 10
205
185
3.9 80 38
60
30
Panel thickness
Panel mounting
bracket
173 +1.1
0
156 +1.1
0
121
138
PANEL CUTOUT
5.eps
(0.04 to 0.39)
(7.28)
(8.07)
(1.5) (3.15) (0.15)
(6.14)
(4.76)
(6.81) (5.43)
(1.2)
(2.36)
49
Adapter
G1/2 screw (/AFTG)
1/2 NPT screw (/ANSI)
Approx.
55
2.eps
(2.2)
(1.93)
Unit: mm (inch)
Figure 3-2a. Panel mounting diagram