Table Of Contents; Introduction; Description; Ancillary Equipment - ABB 2867 Series Manual

CONTENTS
Contents
1 INTRODUCTION ............................................................. 1
1.1 Description ............................................................. 1
1.2 Ancillary Equipment ............................................... 1
2 INSTALLATION .............................................................. 2
2.1 Mounting ................................................................. 2
2.2 Electrical Connections ............................................ 2
3 PREPARATION FOR USE ............................................. 2
3.1 Activation of Electrodes ......................................... 2
3.2 Assembly of the System ......................................... 2
3.3 Standardisation pH ................................................. 2
3.4 Standardisation Redox ........................................... 3
4 ROUTINE MAINTENANCE ............................................ 3
4.1 Salt Bridge Solution ................................................ 3
4.2 Standardisation ...................................................... 3
4.3 Cleaning ................................................................. 3
4.3.1 Glass Electrodes ........................................ 3
4.3.2 Platinum Electrodes: .................................. 4
4.3.3 Antimony Electrodes .................................. 4
4.3.4 Ceramic Plug: ............................................. 4
4.4 Care of Plugs and Sockets .................................... 4
5 SERVICING ................................................................... 4
5.1 Removal of Electrode Assembly ............................ 4
5.1.2 Replacement of Electrode assembly ......... 4
5.2 Fault Finding ........................................................... 4
6 LIST OF SPARES ........................................................... 5
NOTE. Electrode assemblies:
1980 400
1980 500
have now been replaced with the following assemblies
respectively:
1980 430
1980 530.
The former assemblies
environmental reasons, in line with Company policy.
Page
are now discontinued

1 INTRODUCTION

This manual describes the Industrial dip electrode system
Model 2867. Electrode assemblies for use with the system
incorporate electrodes of either glass or antimony for pH
measurements, or platinum for redox measurements.

1.1 Description

This system is constructed in plastic throughout and consists
of an ABS tube, with a transparent perspex section
incorporated in its upper half, supported by a mounting flange
or bracket. The electrode assembly is screwed into the lower
end of the system and sealed with an 'O'-ring.
The system tube is filled with salt-bridge solution forming an
integral reservoir for the reference element mounted in the
upper end of the electrode assembly. A liquid junction with the
sample solution is made at a ceramic plug fitted in the wall of
the system tube at its lower end. The connecting cable to the
electrode assembly passes through the system tube and out
through a rubber bung closing the upper end of the system.
The system is made in three standard lengths permitting
immersion of the electrodes in the solution to be measured to
nominal depths of up to 457 mm (18 in), 915 mm (36 in) or
1830 mm (6 ft). On both versions the mounting flange or
bracket is located by two rubber 'O'-rings.
The Model 2867 will operate in sample temperatures over the
range 0 to 70°C and is specially designed so that temperature
variation effects are reduced to a minimum.

1.2 Ancillary Equipment

Electrode Assemblies
Dual electrodes specially designed for use with the Model
2867 system are available as assemblies for direct mounting.
The assembly consists of a combined measuring/reference
electrode contained in an ABS plastic tube. The membrane of
the measuring electrode projects through the lower end of the
tube: the reference element projects through the upper end of
the tube.
Assemblies available are as follows:
Model No. Type Application
1912 400 Glass pH
1980 430 Platinum Redox
1990 400 Antimony pH
1912 500 Glass pH
for
1980 530 Platinum Redox
1990 500 Antimony pH
Note. See List of Spares for ordering information.
fitted with BNC
coaxial connectors
fitted with tagged ends
1