Wiring of the DPH-64
S1 and S2 have 240VAC active neutral and earth terminals, S3 and S4
are potential free with NO, C and NC contacts. A three way terminal
supplies 240VAC next to S3 and S4, thus simplifying wiring if a 240VAC
output is required for S3 and S4. Look up page 23 for wiring options.
It is imperative that all connections are wired through the cable gland
and the transparent lid is always tight to ensure that no corrosive liquids
inadvertently splash into the instrument.
Electrodes
The co-axial cable used to connect the electrode to the DPH-64 must
be of the type supplied with a carbon sleeve between the center core and
shield as any standard co-axial cable will cause a very erratic digital
display. An impedance converter must be used if the location between
electrode and controller exceeds 10 meters. Special consideration also
must be given when placing an electrode in a treatment bath or pool. The
point of injection of neutralising agent and placement of the electrode
(distance between them)
largely determines the dosing characteristics of
the DPH-64.
F
Only use special co-axial cable to connect a pH electrode to the DPH-64.
Starting up the Instrument.
After you have installed the instrument and checked all the wiring and
connections open the isolation valves to the sensor to allow water flow
across it. Plug the power cord into the supply and switch on the DPH-64.
The LCD display lights up and shows pH and Time. Some LED’s may light
up depending on the electrode or simulator input present.
F
Always exit by pressing MODE when looking at configurations in the
various setup menus to ensure no unwanted changes are saved.
DPH-64 Instruction manual
PAGE 9
