Hach-Lange SENSION+ EC71 - Manual (Page 8)

Change the language
The display language is selected when the meter is powered on for the
first time.
1. Use the or to select a language from a list.
2. Confirm with . The measurement screen shows DATA OUTPUT.
3. Select Deactivated if no printer or PC is connected and confirm.
Refer to Select the data output on page 9 for more information
about Data Output.
Standard operation
Calibration
W A R N I N G
Chemical exposure hazard. Obey laboratory safety procedures and wear all of
the personal protective equipment appropriate to the chemicals that are handled.
Refer to the current material safety data sheets (MSDS) for safety protocols.
Calibration settings
The calibration settings contain Calibration type, Calibration frequency
and Display options.
1. From the main menu use the or to select CALIBRATION.
Confirm.
2. Use the to enter the calibration menu.
3. Use the or to select the following options:
Option Description
Calibration type Calibration type—select Molar Standards, Demal
Standards, NaCl Standards, Calibration to a X value, data
introduction or Theoretical calibration. Refer to
Calibration
types for more information.
Option Description
Cal. frequency Calibration reminder—can be set between 0–99 days
(default 15 days). The display shows the remaining time
to the new calibration. Refer to
Set the calibration
reminder on page 9 for more information.
Display Ω Display Resistivity—select YES to show simultaneously
conductivity and resistivity.
Calibration types
Different calibration types can be selected.
1. From the main menu use the or to select CALIBRATION.
Confirm.
2. Use the to enter the calibration menu.
3. Use the or to select Calibration type.
Option Description
Molar Standards 147 µS/cm, 1413 µS/cm, 12.88 mS/cm and
111.8 mS/cm at 25 °C (77 °F)
Demal Standards 1049 µS/cm, 12.85 mS/cm and 111.31 mS/cm at
25 °C (77 °F)
NaCl Standards 1014.9 µS/cm 25 °C (77 °F)
Calibration to a X value To adjust manually any scale value of the
measured conductivity.
Data introduction Manual probe constant introduction.
Theoretical calibration The probe calibration data is replaced with
C=1.000 cm
-1 .
Calibration procedure
This procedure is for general use with liquid calibration solutions. Refer
to the documents that are included with each probe for additional
information.
Note: Solutions should be stirred during calibration. For more information about the
stirring settings, refer to
Change the stirring settings on page 10.
8 English