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Laboratory Multifunction Meter CX-505
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CX-505 measures pH, redox potential (mV), conductivity, salinity, resistivity, concentration of oxygen dissolved in water in % of saturation or in mg/l, atmospheric pressure and temperature.
The measurements made in all measuring functions are of very high accuracy and stability.
Unification of the procedures in all measuring functions makes working easier.
“HOLD” function to freeze the result on the display.
Signalisation of the result stabilisation “READY” with symbol and sound.
Possibility of sending to a PC a report of calibration - up to 10 last calibrations.

In the pH measuring function:
Calibration of the pH electrode: 1 to 5 points.
Automatic detection of the buffers’ value entered by the user.
Automatic correction of the standard solution value (NIST) along with the temperature changes.
Possibility to store characteristics of 3 electrodes makes changing them easily.
Automatic evaluation of the electrode’s condition.
Depending on the chosen electrode possible measurements in pure water, sewage, pastes, etc.

In the redox (mV) measuring function:
Precise redox potential measurement (accuracy 0.1mV).
Possibility to measure redox potential relatively to the entered or measured reference potential
– Vref.
Possibility of automatic calculation of the redox reading in relation to the chloride/silver electrode
to the hydrogen electrode.


In the conductivity measuring function:
Wide measuring range enables measurements in ultra pure water, natural water as well as in very salty solutions.
Newly introduced function is the resistivity measurement of the tested liquid.
Salinity measurement in NaCl or KCl on the basis of the actual real characteristics.
Defining the TDS (Total Dissolved Solids) based on conductivity measurement.
6 sub-ranges switched automatically.
In case of measurements of natural water with conductivity from 60 μS/cm to 1 mS/cm the meter enables using non-linear temperature compensation. The parameters of this type of water is determined in norm EN27888:1999 and concerns surface waters, deep water and well water. This
solution lowers the measurement error.
The measurement accuracy of the ultra pure water with temperature compensation was increased by automatic adjustment of the α coefficient depending on the temperature and kind of trace contaminations.
Calibration by entering the constant K of the cell or in standard solutions in 1 to 5 points.
Wide range of α coefficient 0 to 10 % / °C chosen depending on the measured solution.
Possibility of changing the reference temperature.
In set with high accuracy conductivity cell ECF-1. Measuring range 0÷500 mS/cm sufficient for
measurements in ultra pure water and high salt concentration samples. Metal electrodes are easy
to clean and PVC body protects it against mechanical damage.
Possibility of storing constant K of 3 conductivity cells.
Automatic conversion of conductivity into salinity in NaCl or KCl on the basis of the actual
characteristics and not a constant coefficient, what greatly increases accuracy.

In the oxygen measurement function:
Galvanic dissolved oxygen sensor.
Each of the models equipped with a function of automatic atmospheric pressure measurement with calculation of its influence on the oxygen measurement readout in mg/l.
The meter with dissolved oxygen sensor are easy to operate.
Calibration of the oxygen sensor in 1 or 2 points.
Automatic or manual temperature compensation.
Possibility of introducing the salinity value with automatic calculation of its influence on the result of oxygen measurement.
The meter automatically counts the influence of salinity measured in the conductivity mode on the oxygen measurement result.

Other features:
* Automatic or manual temperature compensation.
* Internal clock with date.
* Internal data-logger enables storing up to 4000 measurements taken as single or in series
   with time, temperature and date.
* The results and calibration data are stored in non-volatile memory.
* Remembers the next calibration date.
* USB output for connecting with PC.
* The meter meets the GLP requirements.

Technical Data:

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