Pr
o
Minent
®
Page 49
H
2
O
2
IMPORTANT
• Depressurise the system before installing the sensor in the fl ow housing. Close stop
valves to the front and rear of the in-line probe housing.
• Placing/removing the sensor into/from the in-line probe housing should be done slowly.
• Do not exceed the maximum permitted operating pressure of 1 bar!
• Ensure the fl ow does not fall below the minimum fl ow rate of 30 l/h!
Monitor the fl ow on the connected measurement and control equipment. If the meas-
ured value is used as a control, switch off the control by reducing to below the minimum
fl ow rate or switch to basic load.
• Avoid installations which allow air bubbles to build up in the sample water.
Air bubbles that cling to the diaphragm of the sensor can cause the measured value to
be too small and thus may lead to incorrect metering in the control system.
Fitting the sensor in the
in-line probe housing
Observe the operation and safety instructions con tained in the operating instructions manual for
the in-line probe housing!
DLG III
Push the O-ring up over the sensor as far as the terminal block.
Insert the sensor into the DLG III.
Tighten the sensor with thread plugs.
DGM
Push the O-ring up over the sensor as far as the terminal block; leave a plain washer in the
DGM.
Insert the sensor into the DGM and fi t tightly with terminal screw until the O-ring is sealed: the
terminal block determines the correct depth for fi tting the sensor.
8.3.2.2
DULCOTEST
®
PER Sensor for Hydrogen Peroxide, Electrical
Installation
General Safety Instructions
IMPORTANT
• Install the equipment so that the power supply for the controller never falls below the
minimum! A power supply that is too low causes errors in measured values and can lead
to over metering in a control system!
• The sensor PER is a sensor with a passive 4-20 mA two-wire interface. The power is
supplied externally or from a mea suring and control system. Connection to the
DULCOMETER
®
D1C controller from ProMinent ensures automatic compliance with
inter face safety requirements.
• When electrically connecting the sensor to the measur ing equipment, only use signal
cables with a diameter of 4 mm.
Electrical
Installation
Turn the upper section of the sensor anti-clockwise through 90° and remove.
Strip the outer insulation back by about 5 cm so that both con nectors are visible.
Loosen the M-12 connection and feed the 2-connector cable through it. Whilst doing this,
keep the two-connector signal cable in the sensor (5 cm).
Strip the insulation from both ends of the cable and connect to the terminal, as shown in the
fi g. (use the screw driver provided). 1 = plus, 2 = minus
Tighten the M-12 connection.
Turn the upper section of the sensor clockwise fi rmly as far as the stop.
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