ProMinent DULCOMARIN 3 Compact Assembly And Operating Instructions Manual page 59

6.3.7.2 Connection of amperometric sensors
6.3.7.3 Connecting the conductive conductivity sensor
With a symmetrical connection, connect the cable
for potential equalisation to the terminals of the
controller. Beforehand, remove the respective wire
jumper at these terminals.
The potential equalisation must always be in con‐
tact with the medium being measured. A special
potential equalisation plug (order no. 791663) and
a cable (order no. 818438) are necessary with the
DGMa bypass fitting. The potential equalisation pin
is always fitted with the DLG bypass fitting, only
the cable (order no. 818438) is needed.
Features when calibrating with potential equalisa‐
tion
When calibrating, immerse the potential equalisa‐
tion in the respective buffer solution, or use the cal‐
ibration receptacle which forms part of the scope of
delivery of the DGMa valve. This calibration recep‐
tacle incorporates an integral potential equalisation
pin to which you can connect the potential equali‐
sation cable.
Connect the sensor, as described in the sensor operating instruc‐
tions, to the corresponding terminals of the controller, see
Ä Chapter 6.3.4 'Terminal diagram' on page 47
NOTICE!
The sensor must be dry
Do not allow the conductivity sensor to come into
contact with liquid. Only allow the conductivity
sensor to come into contact with liquid once the
conductivity sensor has been connected, config‐
ured and calibrated. The sensor parameters (zero
point) of a moist or wet conductivity sensor can no
longer be properly calibrated.
If the conductivity sensor has come into contact
with liquid prior to calibration, there is an option to
dry the conductivity sensor. A dry conductivity
sensor can be successfully recalibrated to the
sensor parameters.
Shielded sensor cable
All conductivity sensors connected to the controller
require a shielded sensor cable.
Connect the sensor in accordance with the wiring diagram.
Assembly and installation
59