Firma:                Radiometer

Modell:              PHM 80

Kommentar:      Dokumente engl.

The power is on whenever one of the three pushbuttons (3), (4) or (5) is depressed.

(1) BUFFER knob

Used to standardize the pH meter in accordance with the buffer pH value when calibration is made on a buffer solution.

(2) SET TEMP. knob

Used to compensate for tempera­ture variation of the Sample to be measured. The knob is disen­gaged during mV measurements.

(3) pH pushbutton

Must be depressed during pH mea­surements.

(4) °C pushbutton

To be used in conjunction with SET TEMP. knob (2). When de­pressed, the SET TEMP. knob (2) is operable and the corrected temperature is shown on the display.

(5) mV pushbutton

Must be depressed during mV measurements..(e.g., Redox and Selectrode).

(6) OFF - power pushbutton.

(7) Display Panel with pH, mV, °C, BAT LOW and "minus" annunciators.

The PHM80 Portable pH Meter is a modern, digital Instrument character­ized by its ease of Operation and handy design. Its Compact case, prac­tical tilt-up handle, Standard dry cell power supply and stable, com­bined glass-calomel electrode merke it ideal for accurate pH and mV mea­surements.

The mV range facilitates various kinds of mV measurements, e.g., con­centration measurements with Selec­trodese and redox measurements with different redox electrodes.

Specifications

Measuring Range:                     0 to ± 19.99 pH

                                      0 to ± 1999 mV

Inaccuracy:                                pH< ± 0.03 pH

                                                  mV< ± 3 mV ±0.3% of readings at 25°C

Drift, zero Point:                        pH < 0.003 pH/°C

                                                  mV< 0.1 mV/°C

Drift, Sensitivity:                         < 250 ppm/°C

Drift, Long-Term:                       Negligible

Input Resistance:                      > 10 ¹² Ω

Terminal Current:                      < 1 pA at 25°C ambient

Electrical Zero Point:                 7.0 pH

Buffer Adjustment:                     Adjustable from 5.7 to 7.7 pH at 25°C

Temperature compensation:     -10 to +100 °C, calibrated in 1°C divisions

Display Rate:                             1.5 up-datings per sec.

Power Supply:                           Exchangeable

Please specify type No.: 430-101 for 6 x 1.5 V IEC R14 Standard Dry Cells, lifetime > 800 h

Operating Temperature:            0 - 50 °C ambient

Relative Humidity:                      20 - 80 %

Weight:                                      1290 g

Finish:                                        Chemically resistant paint an aluminium

Dimensions:                              Width:            200 mm

                                                  Height:           66 mm

                                                  Depth:           150 mm