Mettler Toledo M300 ISM Bedienungsanleitung PDF herunterladen (Seite 2)

METTLER TOLEDO US and Canada

58 031 409

243E233240-201

Continuous conductivity monitoring

according to USP <645>

USP guideline <645> sets a standard

for the quality assessment of USP

waters based on measurement of the

electrolytic conductivity. There is a

3-stage test in which stage 1 allows

on-line, non-temperature compensated

conductivity measurement. There are

specific requirements for the sensors

and transmitters (see table below).

Thornton instruments fulfill all these

requirements. In addition, Thornton

instruments provide USP and EP set-

points for convenience.

METTLER TOLEDO instruments

meet USP <645> water

conductivity requirements

Application guide for conductivity sensors

4-electrode sanitary

Specification USP <645>

Conductivity sensor Verify cell constant within

and cell constant accuracy ± 2 % using a reference solution

Conductivity meter NIST traceable 0.1 % precision

calibration resistors in place of sensor

Instrument resolution 0.1 µS / cm

Instrument accuracy 0.1 µS / cm

at 1.3 µS / cm

Temperature compensation Must be read uncompensated

Instrument dynamic range 10

1 2 3 4 5 6 7 ... 13 14

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Mettler Toledo M300 ISM Bedienungsanleitung Seite 2