LABORATORY pH / CONDUCTIVITY / SALINITY METER
CPC-511

The most important features

Simple laboratory meter.
Measures pH, redox potential (ORP), conductivity, salinity, TDS and temperature.
The display enables simultaneous readout of the measured function and temperature.
pH electrode calibration in 1 to 3 constant points (4.00, 7.00, 9.00 pH), conductivity in 1 point.
In the conductivity measurement function constant value of the α coefficient (2%/°C).
Memory of 50 results.
No PC connection.

Detailed description

Easy in use laboratory measuring device, which measures pH, mV (redox potential), conductivity, salinity, TDS and temperature.

Characteristic features:

Large LCD enables simultaneous readout of the measured function and temperature.
Very easy in use.

In the pH measuring function

Calibration in 1 ÷ 3 points in buffer solutions.
Automatic detection of the pH buffer solution’s value 4.00, 7.00, 9.00 pH (optionally: 4.00; 7.00; 10.00 pH).
Meter shows information about the pH electrode condition (readout of the buffer and slope values).
Automatic temperature compensation.
Depending on the chosen electrode, makes measurement in clean water, sewage, pastes, etc.

In the conductivity measuring function

Measures conductivity in distilled water and other liquids up to 1000 mS/cm.
5 sub ranges switched automatically (autorange).
Salinity measurement converted to NaCl up to 250 g/l or KCl up to 200 g/l.
Converts conductivity into salinity according to real characteristic and not a constant coefficient.
Determines estimated value of the total dissolved solids (TDS).
Calibration, by entering the K constant of the cell or by determining it with use of a standard solution.
Possibility of entering the reference temperature value.
Automatic temperature compensation.
Constant α temperature coefficient 2 %/°C. For precise measurements with temperature compensation it is recommended to use meters with variable coefficient (CPC-502, CPC-505).
Memory of 50 results.
Wide temperature measuring range.
Warranty for the meter: 24 months.

The set includes CT2B-121 temperature probe with Pt-1000B resistor, accurate ECF-1 conductivity cell and 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. 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.

TECHNICAL DATA

Function	pH	mV	Conductivity/ Salinity	Temperature
Range	-2.00 ÷ 16.00 pH	±1999 mV	0 ÷ 1000 mS/cm (autorange) / 0 ÷ 200 g/l KCl 0 ÷ 250 g/l NaCl	-50.0 ÷ 199.9°C
Accuracy (±1 digit)	±0.01 pH*	±1 mV*	±0.25%* / salinity 2 %*	±0.1 °C**
Temperature compensation	-5.0 ÷ 110.0 °C	-	-5.0 ÷ 70.0 °C	-
Input impedance	>10¹²Ω	>10¹²Ω	-	-
α coefficient	-	-	2%/°C constant	-
K constant	-	-	0.010 ÷ 19.999 cm^-1	-
Temperature sensor	Pt-1000 standard or accurate
Power supply	12 V / 100 mA power adapter
Weight	520 g
Dimensions (mm)	L = 200, W = 180, H = 20/50

*	The accuracy of the meter only.
**	The accuracy of the meter only. The total error includes the meters and probe’s accuracy. In the range 0 ÷ 100 °C the acceptable error of the probe with Pt-1000B resistor: ±0.8& deg;C, with Pt-1000A resistor: ±0.35 °C.