Xylem Oxi 1970i PORTABLE DISSOLVED OXYGEN METERS Manual de usuario descargar pdf (Pagina 17)

Oxi 1970i Operation

ba75691e01 01/2007

4.2.2 Measuring the D. O. concentration

Note

When measuring the concentration of test samples with a salt content

of more than 1 g/l, a salinity correction is required. For this, you have to

measure and input the salinity of the measured medium first. This is de-

scribed in section 4.3.3 on page 27.

Switching the salt content correction on or off, see below.

To measure the D. O. concentration with and without salt content cor-

rection, proceed as follows:

Switching on/off the salt

content correction

Proceed as follows to switch on the salt content correction:

1 Perform the preparatory activities according to section 4.2.1.

2 Immerse the D. O. sensor in the test sample.

3 Press the <M> key repeatedly until the D. O. concentration in

mg/l appears on the display.

REL1

Sal

LoBat nLF

Lin

Oxi

Tref25 Tref20

Cal

TEC

Auto

Store

Time

Year

Ident

No.

Day.Month

Baud

Sal

RCL

REL2

pH/mV

1 7 6

ARng

mg/l

1 In the D. O. concentration measuring mode, switch on the salt

content correction with <▲ > . The SAL display indicator ap-

pears on the display. The value that was entered is taken into

consideration during the measurement (see section 4.3.3).

2 Switch the salt content correction off with <▼ >. The SAL dis-

play indicator is no longer displayed.