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About this manual
This manual describes the Hydrastep 2468CB and 2468CD Electronic Gauging Systems along with the
recommended options. Except where stated otherwise, the information contained in this manual can be assumed
to apply to either system.
This manual is divided into three parts; the first covers the electrical/electronic system; the second describes the
pressure parts; the third is for coverage of all other aspects.
Part 1 – Electrical/Electronic System
Chapter 1 introduces the Hydrastep 2468 Electronic Gauging System and its operating principles.
Chapter 2 covers the installation, configuration and fault analysis procedures.
Chapter 3 covers the installation, configuration and fault analysis procedures for the Relay Output Board (Chapter 3a),
the Delay Relay Output Board (Chapter 3b) and the Opto-isolated Output Board (Chapter 3c).
Chapter 4 covers the installation, configuration and fault analysis procedures for all versions of the Remote
Display Unit.
Part 2 – Pressure Parts
Chapter 1 is a general introduction to the Hydrastep system of water level determination.
Chapter 2 describes the water column and its components – the preparation, installation of the water column on to
the boiler, acid and steam purging of the boiler system and the fitting of the electrode sensors.
Chapter 3 details the fault repair procedures carried out on the system pressure parts and their commissioning.
Chapter 4 provides a general description of the pressure parts used in the Hydrastep systems.
Chapter 5 details the Pressure Parts specifications.
Caution:
For installation under the Pressure Equipment Directive (PED) 97/23/EC, refer to safety instruction
manual 24688006/SI.
Caution:
For installation under ATEX directive 94/09/EC, refer to safety instruction manual 24685033/SI.
Part 3 – Appendix
Appendix A contains a CSA certified connection drawing and associated notes.
Caution:
For installation in potentially explosive atmospheres in Canada and USA, refer to control drawing
24685037 in Part 3.