wtw inoLab 740, Руководство по эксплуатации

Страница: 135 / 274

Dissolved oxygen (D. O.)
135
8 Dissolved oxygen (D. O.)
Measuring modules for the inoLab Level 3:
Oxi, BSB/BOD, pH/Oxi and Multi.
8.1 Settings for D. O. measurements
In order to achieve comparable and reproducible measuring
results, we recommend checking the current settings before
measuring.
8.1.1 Determining the measuring range
For D. O. measurements, two measuring ranges with
different resolutions are available.
l
Range from 0 to 19.99 mg/l dissolved oxygen.
Standard range for all aqueous test samples.
l Range from 0 to 90.0 mg/l dissolved oxygen.
This range may be necessary for non-aqueous test
samples (measuring ranges: see chapter 15 T
ECHNICAL
DATA
).
Note
When connecting a recorder, deactivate the AutoRange
function if measured values are also expected outside the
range of 0 ... 19.99 mg/l. Otherwise, the recorder scaling at
the range limits will change.
1 Switch to the Menu mode.
2 Use
46
to select the main Meas menu.
3 Select the Oxi setup menu item with
82
.
4 Confirm the Oxi setup menu item with
g
.
5 Select the AutoRng menu item with
82
.