pH-mètre et conductimètre combiné

Detailed description:

A device of high accuracy, which measures: pH, redox potential, conductivity, resistivity, salinity, TDS and temperature. The currently offered model has been modified and is equipped with new functions which make working easier and ensure higher accuracy.

Characteristic features:

 

• Large easy-to-read backlit LCD facilitates working.
• „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 chosen electrode making measurement in pure water, sewage or soil is possible.
• pH electrode calibration: 1 ÷ 5 points.
• Automatic detection of pH buffers, value may be entered by the user.
• Automatic correction of the standard solution value (NIST) with the temperature changes, what eliminates the necessity of warming up or cooling them down.
• 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, so there is no interference.

 

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.
• In set with high accuracy ECF-1 conductivity cell. Measuring range 0 ÷ 400 mS/cm sufficient for measurements in ultra pure water and high salt concentration samples. 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 calculation of the redox potential result in reference to 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.
• Change of the date protected by a password
• The data transmission software enables printout of the data in a form protected against any changes.
• The meter meets the GLP requirements.
• 24 months of warranty for the meter.

The standard set includes: ECF-1 conductivity sensor, CT2B-121 temperature sensor with Pt-1000Bresistor, EPS-1 pH electrode for measurements in clean water. It should not be used in other types of liquids. Measurements in liquids with sediments should be made with use of IJ-44A pH electrode, which enables measurements in various samples of both pure and contaminated liquids and semi-solids. Its unusual construction („intermediate junction”) protects the real junction (diaphragma) of the electrode against clogging, ensures stable measurements in these types of liquids or semi-liquid masses, in which other electrodes stop working quickly. When properly handled and maintained the electrode’s lifetime is longer than the standard electrodes.