pH / CONDUCTIVITY / SALINITY METER CPC-661

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The most important features

• pH / conductivity meter for laboratory use.
• Measures pH, redox potential (ORP), conductivity, salinity, resistivity, TDS and temperature.
• Simultaneous observation of all the chosen functions results on the colour touch sreen.
• Wide measuring range enables measurements of all types of liquids both ultra pure and salines.
• Calibration in 1 to 3 points.
• In the pH function automatic correction of the pH standard solution value changes, along with the temperature changes for NIST standards.
• In the conductivity measurement function automatic selection of the temperature coefficient for natural and ultra pure water.
• Memory of 500 results.
• USB output.
• Small size and weight.
• Meets the GLP requirements.

In the pH and mV measurement function:

• Depending on the kind of applied electrode it may be used for clean water, sewage, soil, pastes, meat, cheese and other measurements.
• Calibration of the pH electrode in 1 ÷ 3 points with possibility of choosing the buffers value in a given range.
• Range of the entered calibration points: 1 point 0.000 ÷ 6.000 pH, 2 point 6.800 ÷ 7.100 pH, 3 point 8.000 ÷ 14.000 pH.
• Automatic detection of buffer solutions and standard solutions entered in the meters memory.
• Automatic correction of the pH standard solution value along with the temperature changes for NIST standards, what eliminates the necessity of the standard solution temperature adjustment.
• The NIST standard solutions entered in the meters memory are phtalate, phosphate and borax or bicarbonate (chosen when the meter is ordered). The solutions in 20°C have following values: 4.001 pH, 6.881 pH, 9.225 pH or 10.064 pH.
• Possibility of storing characteristics of 3 pH electrodes enables their quick replacement – very useful when using different types of electrodes specific for different types of samples.
• Automatic control of the electrode’s condition.
• Possibility of viewing the electrode's parameters (buffer and slope).
• Precise redox potential measurement (accuracy 0.1mV).
• The pH and conductivity measurement circuits are isolated, so there is no interference during simultaneous measurements.
• Automatic or manual temperature compensation.

In the conductivity measurement function:

• Wide measuring range enables measurements in ultra pure water as well as in high conductivity solutions.
• 6 sub-ranges switched automatically.
• The first sub range 0 to 20 µS/cm enables measurements of pure water with resolution up to the 3rd decimal place.
• 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 are determined in the norm EN27888:1999 and concern surface water, deep water and well water. This function lowers the measurement error.
• The measurement accuracy of the ultra pure water with temperature compensation was increased by automatic adjustment of the temperature α coefficient depending on the temperature and kind of trace contaminations.
• The reference temperature may be chosen between 25°C and 20°C.
• Calibration by entering the constant K in range 0.010 ÷ 20.000 cm-1 or in standard solutions in 1 to 3 points.
• Wide range of α coefficient 0 ÷ 10 % / °C chosen depending on the measured solution.
• Possibility to store constants K of 3 cells which cover whole measuring range.
• Automatic calculation of conductivity into salinity in NaCl or KCl on the basis of the real characteristics instead of a constant coefficient, what greatly increases the accuracy.
• Possibility of defining the TDS with entering the TDS coefficient in range 0.2 ÷ 1.0.
• Resistivity measurement function.
• Memory of 3 conductivity cells constant K values enables fast replacing in case of measurements in different ranges.

Other features:

• Internal clock with date.
• Collecting up to 500 data sets in the internal data-logger with temperature, time and date, single collecting and taking series of measurements of all measured functions.
• Non-volatile memory of the stored results and calibration data.
• HOLD function to freeze the actual measurements results on the screen.
• Stabilised reading signalisation.
• Storing the calibration validity date and signalising it to the user.
• Possibility of choosing the language of the displayed information : English, German, French, Italian, Spanish, Portuguese.
• Possibility of connecting with a PC by a USB connector.
• Software for data transmission and collection delivered in set.
• Up to 10 last Calibration Reports transfer to a PC for printout.
• Powered with 5V/1000mA USB power adapter.
• The meter meets the GLP requirements.
• 24 months of warranty for the meter.