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HYDRO’pH
®
,
HYDR’ORP
®
,
HYDRO’pH Duo
®
and
HYDRO’pH/ORP
®
instructions
5-3
On/Off switch
The « on/off » switch of
HYDRO’pH
®
, HYDR’ORP
®
and
HYDRO’pH/ORP
®
controllers is
necessary for the commissioning of the equipment.
It also allows cutting the supply of controllers to make the use programming during the
commissioning (Hidden mode).
It is also used for technical set off during an operating fault to await the technical services
intervention.
CAUTION:
In any case, this switch can be used for working inside the controller!
Only the primary power failure allows this intervention!
5-4
Safety breaker circuit uses in the HYDR’ORP with socket
In the “HYDRO’ORP Socket” version, the “On/Off” switch is replaced by a safety thermal circuit
breaker of 2A. Push on it to start the device.
5-5
Sensor(s) input(s)
The BNC inputs of pH and ORP sensors of
HYDRO’pH
®
, HYDR’ORP
®
and
HYDRO’pH/ORP
®
controllers are « high impedance » inputs. They must be kept clean and free of moisture or corrosion.
They are identified when they are both. (One for pH the other for ORP)
CAUTION:
The BNC connectors must be kept clean and free of moisture or corrosion!
On
Off
pH ORP