Conductivity Measurement; Temperature Compensation; Free Chlorine Measurement - Consort R3610 Mode D'emploi

Conductivity measurement

Free chlorine measurement

Sample point
Before the exact location of the electrodes is finalised, it is worthwhile to carry
out a measuring profile of the process stream to ensure that the required
homogeneity is being achieved. As a general rule the electrodes should protrude
into the process stream by one-third of the pipe width and be positioned so as to
avoid gas pockets or sediments.
Generally the measuring electrodes are inserted into the flow with the sample
pick-up facing downstream in order to reduce the risk of blockage by suspended
material.
All sensors are usually positioned vertically at a suitable point downstream of the
dosing point, where the measurements are stable and reliable. The response of
the dosing system will be affected by the time required to disperse the reagents
and their arrival at the measuring point.
Conductivity measurement
1. Select the desired mode (S/cm) by pressing é ê . The display will immediately
show the measured value according to the previous calibration. Should you
want to recalibrate, press CAL.
2. The instrument permits to choose between the standards in memory (1413
µS/cm, 12.88 mS/cm, 111.8 mS/cm + up to 3 user tables). Select the proper
values and press OK. The unused standards should be switched off.
3. After rinsing the electrode several times with the first standard solution,
immerse it in that standard. The solution temperature is not so critical but
should lie between 0°C and 40°C. When no Pt1000 is used, do not forget to
compensate manually first! Select [CALIBRATE], press OK and follow the
instructions on the screen until the calibration is finished.
4. Rinse the electrode several times with the sample, immerse it in that solution
and read the display.
5. Rinse the electrode always after use and store it in distilled water (add some
detergent to keep the spongy platinum surface in perfect condition).

Temperature compensation

1. Press CAL.
2. Select [REF.] and press OK.
3. Select the temperature to which all future measurements will be referred to
(25°C or 20°C) and press OK.
Capacitive compensation
1. Capacitive compensation increases accuracy in the very low conductivity
ranges (<10 µS/cm). Select whether or not this compensation should be
applied. Verify if the attached electrode is completely dry and press CAL.
2. Select [CAP.COMP] and press OK.
3. Select [YES] or [NO] and press OK. Follow the instructions on the screen.
(R3630 only)
4. Select the desired mode with é ê . The display will immediately show the
measured value according to the previous calibration. Should you want to
recalibrate, press OK.
5. Select [SIGNAL], press OK.
6. Select signal level of the electrode (low, normal or high depending on the
water flow) and press OK.
7. Let the electrodes rest in the water stream for at least 24 hours (all dosing
systems switched off). Measure the free chlorine accurately with a suitable
photometer immediately before calibration. Select [CALIBRATE], press OK,
adjust to the proper value and press OK.
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