Emerson Mobrey Hydratect 2462, Reference Manual

Page: 17 / 66

11
Reference Manual
24625020, Rev AA
Installing the electrodes
March 2017
Installing the electrodes
Section 2 Installing the electrodes
2.1 Electrode installation methods
The electrodes available for use with a Hydratect 2462 system are listed in Table 2-1 .
For an electrode to function correctly, it must be contained in a 'cell' of known volume.
This allows the Hydratect 2462 Electronics Control Unit to differentiate between the
resistance of a known volume of steam and the same volume of water. For this reason,
electrodes are mounted in an insert or a manifold.
An insert is for the mounting a single electrode in a vertical or horizontal pipe run, but the
manifold is for the mounting of up to four electrodes vertically.
A single Hydratect 2462 system can use one or two electrodes. Where two are used, they
should be spaced apart by a minimum of 3 in. (76 mm) if on the same side of the pipe or
manifold, or 1.5 in. (38 mm) if on opposite sides.
Table 2-1. Available Electrodes
2.2 Mounting an electrode to an insert
Mounting an electrode on an insert involves four steps:
1. Welding the insert to the pipe.
(see
“Welding the electrode insert to a pipe” on page 12 ).
2. Fitting the base plate of an electrode-insert cover
(see
“Fitting the electrode-insert cover (part one)” on page 13 ).
3. Fitting the electrode to the insert (see “Fitting the electrode” on page 15 ).
4. Fitting an electrode cover
(see
“Fitting the electrode-insert cover (part two)” on page 16 ).
Electrode covers are available which offer a basic level of mechanical and
environmental protection, but have not been assessed to any particular protection
standards.
Emerson recommend that the installer gives particular attention to the location and
environment where the equipment is being installed and, if necessary, fit additional
protective measures.
Part number
Maximum
pressure
Maximum
temperature PH range
Insulation
type
246785Z 210 bar (3045 psi) 370 °C (698 °F) 7 to 11 Zirconia
246785A 300 bar (4350 psi) 560 °C (1040 °F) 7 to 11 ZTA