Yokogawa EXA DC402 Dual-Channel Conductivity Analyzer - Manual (Page 19)

IM 12D08E02-01E
3-8 Installation and wiring
3-6. Sensor wiring
Refer to figure 3-9, which includes drawings that outline sensor wiring.
The EXA DC402G can be used with a wide range of commercially available sensor types if provided with
shielded cables, both from Yokogawa and other manufacturers. The sensor systems from Yokogawa fall
into two categories, the ones that use fixed cables and the ones with separate cables.
To connect sensors with fixed cables, simply match the terminal numbers in the instrument with the iden-
tification numbers on the cable ends.
Note that the DC402G uses the 2 electrode measuring principle. Yokogawa sensors and cables are pre-
pared for compatibility with 4-electrode measuring systems. To avoid problems either cut off and insulate
the wires tagged 13 &16 or connect the wires in tandem 13 &14 into terminal 14 or 15 &16 into terminal
15.
Figure 3-9. Sensor wiring diagrams
3-7. Sensor connection using junction box and extension cable
Where a convenient installation is not possible using the standard cables between sensors and convert-
er, a junction box and extension cable may be used. The Yokogawa BA10 junction box and the WF10
extension cable should be used. These items are manufactured to a very high standard and are neces-
sary to ensure that the specifications of the system can be met. The total cable length should not exceed
60 metres (e.g. 10 m fixed cable and 50 m extension cable).
NOTE: Numbers 17 of both WF10 and BA10 do not need to be used.
NOTE: Use shielded cable
11 TEMPERATURE
12 TEMPERATURE
14 CELL
15 CELL
CONDUCTIVITY RESISTIVITY CONVERTER
SEPARATE SENSORS WITH WU40-LH.. CABEL
11 TEMPERATURE
12 TEMPERATURE
14 OUTER ELECTRODE
15 INNER ELECTRODE
SC4A... SENSORS WITH INTEGRATED CABEL
RET
YELLOW/GREEN
BROWN
BROWN
1
2
1
2
SX42-SX . . - . F SENSORS
11 TEMPERATURE
12 TEMPERATURE
14 OUTER ELECTRODE
15 INNER ELECTRODE