Hach sension6, Инструкция по эксплуатации, Страница: 31 / 86

30
SECTION 3,
continued
1. To change the units, access the setup mode by pressing the
SETUP/CE
key.
2. Press the up arrow once. A
2
will begin flashing in the upper
right hand corner of the display.
3. Press the
READ ENTER
key to select °C or °F and press the
EXIT
key. The barometric pressure and altitude units will
change automatically.
3.1.3 Selecting Measurement Resolution
This feature changes the resolution for dissolved oxygen
concentrations displayed in mg/L.
1. To change the resolution, access the setup mode by pressing
the
SETUP/CE
key.
2. Press the up arrow twice. A
3
will begin flashing in the upper
right hand corner of the display.
3. Press the
READ ENTER
key to select a resolution of 0.0 or
0.00 mg/L and press the
EXIT
key.
3.1.4 Adjusting for Sample Salinity.
This feature adjusts the displayed dissolved oxygen concentration
in mg/L based on the sample’s salinity.
Note: When the Sal icon is displayed during the read mode, a salinity
correction calculation is applied to the dissolved oxygen
concentration in mg/L. The dissolved oxygen concentration in %
saturation is the ratio of the displayed concentration in mg/L to the
equilibrium dissolved oxygen concentration for the sample’s
temperature and salinity plus barometric pressure and altitude
entered in the meter.
Determine the salinity of the sample using an Electrolytic
Conductivity Meter. The units for salinity are parts per thousand
(0/00). See
Table 7 on page 67 .
1. After the salinity of the sample has been determined, access
the setup mode by pressing the
SETUP/CE
key.
2. Press the up arrow three times. A
4
will begin flashing in the
upper right hand corner of the display. The display will show
the current salinity factor and the Sal icon.