Xylem MULTI 3400i pH/Cond MULTI-PARAMETER METERS Manual de usuario descargar pdf (Pagina 33)

pH/Cond 3400i Operation

4.4 Conductivity/Salinity

4.4.1 General information

Note

Conductivity measurements with the pH/Cond 340 can only be carried

out using the TetraCon 325 measuring cell.

Warning

When connecting an earthed PC/printer, measurements cannot be per-

formed in earthed media as incorrect values would result.

The RS232 interface is not galvanically isolated.

Preparatory activities Perform the following preparatory activities when you want to measure:

Temperature sensor The TetraCon 325 conductivity measuring cell has a temperature sen-

sor integrated in it. The temperature sensor is shown on the display by

TP.

Temperature

compensation

Selectable linear or nonlinear temperature compensation, can be

switched off (see section 4.8 C

ONFIGURATION).

Reference temperature,

Tref

The reference temperature (Tref) can be switched between 20 °C and

25 °C. It appears on the display as Tref20 or Tref25. To switch over the

reference temperature, see S

WITCHING OVER THE REFERENCE TEMPERA-

TURE, page 60.

1 Connect a conductivity measuring cell to the measuring instru-

ment. The instrument automatically switches over to conductiv-

ity measurement (status display or SAL).

If the conductivity measuring cell is already connected, press

the <M> key repeatedly until the status display or SAL ap-

pears.

2 Check the selected cell constant (see below) or calibrate the

measuring instrument with the measuring cell (see

section 4.4.5).

3 Using <▲ > <▼>, toggle between the measuring modes, con-

ductivity ( in µS/cm) or salinity (SAL).

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Xylem MULTI 3400i pH/Cond MULTI-PARAMETER METERS Manual de usuario Pagina 33