LABORATORY pH / CONDUCTIVITY / SALINITY METER CPC-505

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The most important features

• Very high accuracy meter for laboratory use.
• Measures pH, redox potential (ORP), conductivity, salinity, resistivity, TDS and temperature.
• Calibration in 1 to 5 points.
• In the pH function, automatic correction of the pH standard value with temperature (NIST standards).
• In the conductivity measurement function automatic selection of the temperature coefficient for natural and ultra pure water.
• Memory of 4 000 results.
• USB output.
• Meets the GLP requirements.

Detailed description:

Characteristic features:

• Large, easy-to-read backlit LCD with brightness adjustment.
• „HOLD” function enables freezing the result on the display.
• Signalisation of the result stabilisation with the „READY” symbol and a sound.
• Possibility of sending a calibration report to a PC - up to 10 last calibrations.
• Standardised procedures in all measuring functions make working easier.

In the pH measurement function:

• Depending on the electrode used, measurements in pure water, sewage, soil or other samples are possible.
• pH electrode calibration: 1 ÷ 5 points.
• Automatic detection of pH buffer values entered by the user.
• When NIST pH standards are used, their stored values are automatically corrected for temperature, so there is no need to heat or cool the solutions.
• Possibility to store 3 electrodes’ characteristics makes changing them easy.
• Automatic evaluation of the electrode’s condition.
• Possibility of the electrode's characteristic readout (offset and slope).
• The pH and conductivity measurement circuits are isolated, which eliminates interference between them.

In the conductivity measurement function:

• Wide measuring range enables measurements in ultra pure water, natural water as well as in high conductivity samples.
• 6 sub-ranges switched automatically.
• Calibration by entering the K constant in the range 0.010 ÷ 19.999 cm^-1 or in standard solutions in 1 – 5 points.
• Possibility of storing K constant of 3 conductivity cells.
• Possibility of changing the reference temperature.
• Wide range of α coefficient (0.00 ÷ 10.00 %/°C).
• 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 norm EN27888:1999 and concern surface water, 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.
• Automatic conversion of conductivity into salinity in NaCl or KCl on the basis of the real characteristics and not a constant coefficient, what greatly increases accuracy.
• Defining the TDS (Total Dissolved Solids) based on conductivity measurement.
• The set includes a high-accuracy ECF-1 conductivity cell with a measuring range of 0 ÷ 400 mS/cm, sufficient for most liquids, e.g. aqueous soil extracts and sewage. Metal electrodes are easy to clean.

In the redox (mV) measuring function:

• Precise redox potential measurement (accuracy 0.1 mV).
• Possibility to measure redox potential relatively to the entered or measured reference potential – Vref.
• Possibility of automatic conversion of the redox potential measured with a silver chloride electrode to the standard hydrogen electrode.

Other features:

• Automatic or manual temperature compensation.
• Internal clock with date.
• Internal datalogger enables storing up to 4000 measurements taken in series or singly with temperature, time and date.
• Storing the readouts and calibration data in non-volatile memory.
• Software for data transmission and collection delivered in the set.
• Stores the calibration date.
• USB output.
• Possibility of protecting the date and time against changes by an unauthorised person using a password.
• The data transmission software enables printout of the data in a form protected against any changes.
• The meter meets the GLP requirements.
• IP64 ingress protection.
• 24 months of warranty for the meter.