Hofmann PMH-2, Руководство пользователя

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INSTALLATION
Instrument
Select a position for the controller to be mounted on a wall, not facing into
direct sunlight and protected from the weather elements as much as possible.
The PMH-2 should be installed near the treatment plant. Maximum length of
the co-axial cable used should not exceed 10 metres because of the very high
input impedance characteristic of a pH electrode.
The metal electrodes used for redox measurements are of much lower
resistance and longer coaxial cables can be used without any special
precautions.
Insert a round headed screw into the panel where the instrument is to
be attached. This screw determines the centre of the instrument location.
(Fig.3) Slide the instrument over the slot opening at the back, check that
the unit hangs level and secure it with two screws inserted through the
slots at the two bottom corners.
F
Do not drill any holes into the enclosure to install the controller.
FIG 3 Attaching the DPH-4 to a wall
PMH-2 Instruction manual PAGE 9