Tecnosens NCL C10, Руководство по сборке

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4. Activation and Maintenance of the Sensor
21
4.5 W
ORKING
P
ARAMETERS AND
S
ENSOR
C
HARACTERISTICS
✓
Correspondence of output signal in voltage depending on the full scale: for
example the probe with full scale at 20 ppm, the signal delivered will be
−2000 mV therefore the correspondence will be equal to −100 mV for each
ppm.
✓
Correspondence of output signal in current dependent on the full scale: for
example the probe with full scale at 20 ppm will correspond to about 0.8
mA per ppm.
✓
All connections are protected against polarity inversion.
✓
The water pressure to which the probe is exposed must not exceed 1 bar.
✓
During operation, there must be no air bubbles near the membrane that
could decrease, or even cancel, the measurement of the probe.
✓
The flow rate inside the probe holder must be stable and within the range
of 30 ÷ 60 l h.
✓
The operating temperature must not exceed 45 °C. If the water
temperature is close to 0 ◦C, it is essential for the operation of the probe
that there are no ice crystals in the flow.
✓
The value measured by the sensor is not very dependent on the pH. The pH
range, optimal for operation, is between 4 pH and 10 pH.
✓
The reference electrode can only be cleaned with water and left to dry on
its own without the aid of cloths or paper. Sandpaper or other material
should not be used on the reference electrode. Touching the reference
electrode could compromise the correct functioning of the probe.
✓
A complete check of the probe is recommended every 5 ÷ 6 months. This
term depends on the quality of the water and the outflow conditions.
✓
Always avoid sedimentation on the membrane. In this case, immerse the
membrane in a 1% hydrochloric acid solution for a few minutes and then
rinse carefully.
✓
The tubular gasket guarantees perfect insulation between the inside and
outside of the membrane cap. If this seal is no longer ensured by the same,
it is recommended to replace it with a new one.