6-1. connection cable – Yokogawa EXA PH202 2-Wire pH/ORP Analyzer User Manual
Page 42
IM 12B07D02-01E
Installation and wiring 3-9
3-6-1. Connection cable
There are two types of connection cable, one for single sensors and one for combined sensors. The
former is a coaxial cable and has only two connections.
• Red
to measuring element
• Blue
to screen (shield)
The latter is a triaxial cable with three connections, (it has an extra white wire termination) these wires
are connected:
• Red
to measuring element
• Blue
to reference
• White to screen (shield)
To connect the other sensor systems, follow the general pattern of the terminal connections as listed
below:
11 & 12
Temperature compensation resistor input
13
Input no. 2 (normally the reference element)
17
Screen (shield) for input no. 2
14
Liquid earth (solution ground) connection
15
Input no. 1 (normally the measuring element)
16
Screen (shield) for input no. 1
*
*
*
*
*
*
*
pH transmitter
Green
Yellow
Red
Cable markers
11 Temperature
12 Temperature
13 Reference
14 Solution ground
15 Glass (measure)
16 Shield
17 Shield
Red
Blue
Red
Black
Red
Blue
Blue
11 Temperature
12 Temperature
13 Reference
14 Solution ground
15 Glass (measure)
16 Shield
17 Shield
11 Temperature
12 Temperature
13 Reference
14 Solution ground
15 Glass (measure)
16 Shield
17
11 Temperature
12 Temperature
13 Reference
14 Solution ground
15 Glass (measure)
16 Shield
17 Shield
Combined pH/ref sensors
Cable markers
Red
Blue
Blue
Black
Red
White
Green
Blue
FU20/FU25 4-in one sensor
Note: Connect cables to similarly marked
terminals: 11 to 11, 12 to 12, etc.
Retractable sensor assembly PR20
(Also PD20, PF20 & PS20)
NOTE:
Connect cables to similarly marked terminals:
11 to 11, 12 to 12, etc.
Figure 3-10a. Sensor wiring