Μw Measurement - Consort C832 Anleitung

Relative measurements (not C838):
1. While in the conductivity or salinity mode, press Ù. At that moment the
instrument stores the actual value and automatically subtracts it from all
next measurements. You can repeat this as many times as required. A blinking
[r] in the display appears.
2. To cancel relative readings, press MODE and you will be in the normal measur-
ing mode again.
Maintenance:
A conductivity cell is active and stable only after wetting! For this purpose it
must be immersed for at least one hour in distilled water. Rinse the cell always
after use and store it in distilled water (add some detergent to keep the spongy
platinum surface in perfect condition).
A polluted cell may be cleaned with a soft detergent or diluted nitric acid. Greasy
substances may be removed with acetone or alcohol (never do this with plastic
electrodes!).
Temperature compensation (C833, C835):
Each solution has its own temperature coefficient, which also varies with the
temperature. Therefore it is impossible to achieve an exact temperature com-
pensation over a wide span of temperatures with a conventional conductometer.
However, this model features a unique microprocessor controlled system, which
helps you to completely overcome the problem of non linear temperature com-
pensation curves for most of the species to be measured. There is no need to keep
sample temperatures close to each other, since you can plot special temperature
curves from up to 10 different solutions.
1. Press MODE until the display will show e.g. [tc Std] or [tc MAn]. Remember
that [tc Std] is the fixed standard temperature curve (EN27888) which can
never be altered. Select the desired temperature curve and press MODE to
proceed or CAL to start the automatic tracing.
2. Prepare the sample solution to be measured in a thermostatic bath with mag-
netic stirrer. Its temperature should be about 5°C lower than the lowest value
you may possibly need during future measurements, but at least lower than
10°C. The display shows e.g. [tc MAn][8.9] which means manual temperature
curve at 8.9°C. After rinsing the electrodes with the solution to be measured,
immerse them in that solution. Wait a while to enable the electrodes to adapt
themselves to the low temperature. Press CAL again to start the automatic
plotting procedure.
3. Slowly increase the temperature (max. 0.1°C/s) of the thermostatic bath.
You can monitor the temperature on the display while a blinking [c], indicat-
ing that plotting has started, appears. When the temperature is about 5°C
higher than the highest value you need for future measurements (min. 40°C
required), press CAL to stop the temperature tracing. The display shows
shortly [WAIt] while the curve is being computed.
• After a temperature curve has been selected and PRINT is pressed, the instru-
ment transmits the whole curve to the digital output. In the meantime the
display shows shortly [PrintinG].
• If you have traced the temperature compensation in a limited range (e.g. from
10° to 40°C), the curve is supposed to go on linearly outside these limits.
(C838)
1. Select the µW range by pressing MODE.
2. After calibrating and rinsing the pH, ORP and conductivity electrodes with dis-
tilled water, immerse them in the solution to be measured and read the power
in µW.
C831 • C832 • C833 • C835 • C838
µW measurement
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