INSTALLATION
Instrument
Installation and setting up of the DCH-2 is easy and straight forward.
No special tools are required.
(See Fig.2)
The 4 screws are inserted
through 4 corner holes
(locking holes for the transparent lid)
and also
fastened through them with a screw driver. All cables are fed through the
3 cable glandsand terminated at the appropriate terminals. Alwayscheck
that the stripped wire end is inserted above the small sliding metal block
inside the terminal to ensure proper connection when tightening the
terminal screw.
(See Fig.3)
If the control relays are used to switch 240VAC a wire link may be
connected between the 240V active terminal and the common contact of
the relays.
Electrode
The cell is mounted in line into a 3/4" BSP Tee. The T-piece used to
install the electrode must be PVC to ensure that no short circuit between
the stainless steel electrodes and pipe fitting occurs. A conduction leak-
age may also affect the accuracy of the instrument reading if a metal
T-piece is used.
The 4 core cable plugs into the 4 pin socket situated on the back of the
electrode. Never cut the cable or rejoin the 4 wires to shorten or lengthen
the cable, as this will result in unreliable and inferior performance. Always
reconnect the whole length of the cable to the 4 pin plug. Longer cables
up to 10 metres can be supplied on request.
The electrode in the standard package contains a 4 pin socket and a
3 metre cable. This greatly simplifies an installation where the cable is
wired through a conduit or is fastened to a walland the electrode screws
into a pipe. For situations where it is necessary to simply immerse the
electrode into the solution a special model with a 3 metre cable directly
moulded to the body can be supplied on request.
DCH-2 Instruction manual PAGE 7
