ProMinent DULCOTEST CGE 2-4P-10 ppm, Operating Instructions Manual, Page: 26 / 68

Pr o Minent
® 26
Installation
6 Installation
IMPORTANT
• The sensor should be installed in such a way that the
power supply is never interrupted.
• Do not switch off the measuring system if it is not being
operated continuously.
• It may be necessary to delay switching on the dosing
equipment.
When using with external equipment (mA-Variant):
IMPORTANT
• Do not allow the power supply to fall below 16 V DC, not even
for a short period. The power source must be able to bear a
minimum load of 35 mA at 16 V DC. Do not switch off the
measuring system if it is not being operated continuously.
It may be necessary to delay switching on the dosing
equipment. If the power supply is too low, the measured
variable will be incorrect and this can lead to a dangerous
chlorine overdose.
• Ensure that nobody else is using the same voltage.
The measuring device and monitor must not use the same
voltage as either the probe or power supply.
The mA model is a probe with a passive 4-20 mA two-wire interface, i.e. the
power supply is external, i.e. from the controller. When it is connected to a
ProMinent controller (e.g. DULCOMARIN
® , DULCOMETER ® D1C or D2C), the
interface’s safety requirements are met automatically.
Observe the following when connecting it to external equipment:
Power source: 16-24 V DC, min. 35 mA with 16 V DC
Max. load: 1 W
Electric installation:
mA-Variant
왘
Turn the upper part of the sensor a quarter of a turn anticlockwise and
remove it.
왘
Loosen the PG-7 threaded connector and guide the 2-lead cable through,
providing a spare 5 cm of bare cable inside the sensor.
왘
Connect the cable to the terminal: 1 = plus, 2 = minus.
왘
Tighten the PG-7 threaded connection.
왘
Push the upper part of the sensor right into the housing and turn it
clockwise as far as it will go.
4P-Variant Put the 4-pole plug in the socket.
IMPORTANT
Connect the 4P variant only to ProMinent controllers with a
corresponding connection plug (e.g. DULCOMETER
®
D_4a
for chlorine).
BA_DT_085_09_07_4spr.p65 13.09.2007, 14:18 Uhr 26