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Minent
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8.6.2
DULCOTEST
®
PHEP or PHER Sensor for pH, Commissioning
8.6.2.1
DULCOTEST
®
PHEP or PHER Sensor for pH, Assembly
Remove the blanking plug of the respective measuring module at the fi ttings of the measuring/
control station DULCOTROL
®
drinking water/F&B and install the DULCOTEST
®
PHEP or PHER
sensor for pH.
8.6.2.2
DULCOTEST
®
PHEP or PHER Sensor for pH, Electrical Installation
Connect the DULCOTEST
®
PHEP or PHER sensor for pH with the marked cable of the respective
controller D1C.
8.6.2.3
DULCOTEST
®
PHEP or PHER Sensor for pH, Running-In
The
DULCOTEST
®
PHEP or PHER sensor for pH must not be run-in.
The DULCOTEST
®
PHEP or PHER sensor for pH can be readily used.
8.6.2.4
DULCOTEST
®
PHEP or PHER Sensor for pH, Calibration
Since pH sensors are subject to certain manufacturing tolerances, they must be tuned to the
pertinent pH transmitter. The adjustment intervals depend on relevant operating conditions. They
can vary from a few days to up to 8 weeks.
Having connected the sensor to the transmitter by means of the sensor cable (taking care that
connectors and cable remain absolutely dry), dip the sensor into a pH 7 standardizing solution
and adjust transmitter exactly to read this value.
Remove the sensor, rinse it with water, preferably distilled water, and dry it by swabbing it with
soft, non-fl uffi ng tissue paper.
IMPORTANT
Do not rub since this might cause static electricity and false readings.
Immerse the sensor in a buffer solution differing by a least 2 pH from pH 7 and calibrate after the
value on the display has stabilised. If within 30 seconds a steady-state value is not produced or
calibration has proved impossible, clean sensor and repeat calibration. If again unsuccessful,
replace sensor with a new one.
pH
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24.02.2009 11:56:08 Uhr