Introduction; Schematic Diagrams - ABB 7651 Instruction Manual

1 INTRODUCTION

This manual describes how to install and operate 7600 Series
industrial electrode systems. These systems are suitable for use
with a variety of measuring electrodes and pH meters operating
over a wide range of pressures and temperatures.
This manual describes:
• Model 7651 – polypropylene with optional pipe and flange
fittings.
• Model 7660 – stainless steel, in-line flow system.
• Model 7661 – PVDF, 1 inch flow system.
• Model 7652 – polypropylene, 2 inch in-line system with 2 inch
BS10 Table E flange fittings.
• Model 7654 – polypropylene, 1 metre (nominal) dip system.
• Model 7664 – PVDF, 1 metre (nominal) dip system.
• Model 7655 – polypropylene, 2 metre (nominal) dip system.
• Model 7665 – PVDF, 2 metre (nominal) dip system,
• Model 7656 – polypropylene, 3 metre (nominal) dip system.
Dip systems are for use in tanks, channels, etc.
All the above models are compatible with the AX, 4500 and 4600
Series pH transmitters. They may also be used with other
instruments such as 9140, 9170 and 9180 Series, but care must
be taken when connecting the temperature compensator – see
Section 4.1 for further details.
An alternative range of systems is available for use in hazardous
areas using approved intrinsically safe transmitters – see Section
4.2.
2
1.1 Schematic Diagrams – Fig. 1.1
0. 0 00
uS/cm
0. 0 00
uS/cm
Dual Cond.
A – Dip System
0. 0 00
uS/cm
0. 0 00
uS/cm
Dual Cond.
B – In-Line System
Fig. 1.1 Schematics Diagrams
Current Output
Relays
Mains in
Current Output
Relays
Mains in