Hach-Lange SI628 C - Manual (Page 16)

12
3. Installation
3.3. Cell cables
Compensation of the cable length
To minimize the effect of the cable resistance in a conductivity measurement, the cable length is compensa-
ted by the 4-wire system. With the Pt 1000 temperature sensor, the cable resistance has little importance.
However, in order to reduce the resistance of the conductor to a half, 2 cables have been connected to
the ends of the sensor.
3.3.1. Cells with MP-5 connector
Notas importantes:
• El si628 C does not require ground connec-
tion (terminal 1).
• Connect the ground only when there could
be interference problems.
DANGER
Relays:
- Limit the current up to 3 A by using
one fuse.
- Do not connect cables with voltage
higher than 24 V.
Terminal assignment (rear panel)
Transmitter si628 C
RED
VCA
CELL 4-20 mA
L 1 L 2
S/N: CRISON INSTRUMENTS, S.A.
E-08328 ALELLA - Barcelona
Made in Spain IP 54
TERMINALS
COLOUR
si628 C
(wall mount)
si628 C
(panel mount)
6 16 White
6 16 Brown
7 15 Pink
7 15 Yellow
8 14 Shield
9 13 Green
10 12 Blue
11 11 Gray
12 10 Red
MP-5 connector, 5 contacts
si628 C_HACH LANGE_Ed. 0510.indd ANG:12 si628 C_HACH LANGE_Ed. 0510.indd ANG:12 20/5/10 11:08:43 20/5/10 11:08:43