GMH 3431 Conductivity Meter

GMH 3431

Conductivity meter that includes 2-pole measuring cell.

Precision digital conductivity meter includes electrode.



- Complies with the standards of the drinking water ordinance (TrinkwV 2001)

- Complies with DIN EN 27888 standard

- Serial interface - Main use: Water, wastewater, chemical solutions

Technical specifications

Measurement range

- Conductividad (LF)







- TDS

- Salinidad

- Temperatura

- Resistividad

0,0 ... 200,0 µS/cm, 0 ... 2000 µS/cm, 0,00 ... 20,00 mS/cm, 0,0 ... 200,0 mS/cm

manually or automatically adjustable (Auto-Range)

0 ... 1999 mg/l

0,0 ... 70,0

-5,0 ... +100,0 °C

0,005 ... 100,0 kOhm * cm

Accuracy ± 1 digit

(a temperatura nominal = 25 ºC)

- Conductividad



- Temperatura

±0.5% of the measurement value ±0.3% of the measurement range or ±2 µS/cm

±0.2% of the measurement value ±0.3 K

Cell correction

ajustable 0,800 ... 1,200 cm^-1, with selectable reference solution manually or automatically

Temperature compensation

off or automatically

(for the temperature sensor integrated in the electrode)

Type of compensation

- nLF: Non-linear function of natural waters according to DIN EN 27888 (ISO 7888)

(Selectable reference temperature: 20 ºC or 25 ºC)

- Lin: linear compensation for 0.3 ... 3.0 % / K (Selectable reference temperature: 20 ºC or 25 ºC)

- off: no compensation

LCD screen

Two 4-digit displays (approx. 12.4 mm and 7 mm height) for conductivity (resistivity, salinity, TDS) and temperature, or for min-max value, Hold function, etc., and additional arrow indicator

Measurement cell

Conductivity measurement cell with integrated temperature sensor in the shaft. Electrode material: graphite. Shaft material: PPE, PS (GMH 3431). Graphite electrodes are the optimal solution for wastewater and can be easily cleaned.

Warranty for the sensor element

12 meses

Working conditions

Medidor: -25 ... 50 ºC, 0 ... 95% H.r.

Measuring cell: -5 ... 80 ºC (permanent), up to 100 ºC (short term)

Relative humidity

0 ... 95% H.r. (without condensation)

Interfaz

Serial interface, connection to RS232 or USB interface to PC via a galvanically isolated adapter GRS 3100, GRS 3105 or USB 3100 N (accessories).

Operation buttons

6 keys for ON/OFF switch, range selection, min-max value memory, Hold function, etc.

Power supply

9 V battery, as well as additional PSU connector (internal pin Ø 1.9 mm) for external supply 10.5-12 V DC

Power consumption

Aprox. 2 mA

Carcasa

Impact-resistant ABS plastic, membrane keyboard, transparent panel, IP65 front, integrates support tab

Dimensions

Medidor: 142 x 71 x 26 mm (H x B x T)

Electrode: approx. 120 mm length, Ø approx. 12 mm, 1 m fixed connection cable between the electrode and the meter

Peso

Approx. 230 g (includes battery and measurement cell)

Contents of the shipment

1 x Conductivity meter GMH 3431

1 x Measurement cell

1 x 9 V batteries

1 x User manual