HACH LANGE sensION+ EC7, Руководство пользователя, Страница: 8 / 268

Use the or to select a language from a list. The meter returns
automatically to the measurement screen after 3 seconds.
Note: To change the language from the main menu, push .
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 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 9.
1. Pour the buffers or calibration solutions into the labeled calibration
beakers.
2. From the main menu push to select EC calibration.
3. Rinse the probe with deionized water and put the probe into the first
calibration beaker. Be sure that there are no air bubbles in the probe
measuring chamber.
4. Push to measure the first calibration solution.
The next calibration solution is shown.
5. Rinse the probe with deionized water and put the probe into the
second calibration beaker. Be sure that there are no air bubbles in
the probe measuring chamber.
6. Push to measure the second calibration solution.
The next calibration solution is shown.
7. Rinse the probe with deionized water and put the probe into the third
calibration beaker. Be sure that there are no air bubbles in the probe
measuring chamber.
8. Push to measure the third calibration solution.
When the calibration is good, the display briefly shows 3rd Standard
OK and then returns to the main menu.
View the calibration data
Data from the most recent calibration can be shown.
1. From the main menu push .
2. Use the to view the last calibration data. The meter returns
automatically to the measurement screen after 3 seconds.
Set the calibration reminder
The calibration reminder can be set between 0 to 99 days (default
15 days). The display shows the remaining time to the new calibration.
Note: When 0 days is selected, the calibration reminder is turned off.
1. From the main menu push and then push until the display
shows Cal. frequency.
2. Use the or to change the value.
The meter returns automatically to the measurement screen after
3 seconds.
Sample measurements
Each probe has specific preparation steps and procedures for taking
sample measurements. For step-by-step instructions, refer to the
documents that are included with the probe.
Note: Solutions should be stirred during measurement. For more information about
the stirring settings, refer to
Change the stirring settings on page 9.
Push NaCl or EC to take a sample measurement. During
measurements, the parameter flashes and the timer shows the
stabilization time. To change the measurement parameter (if applicable),
push and hold NaCl or EC.
To measure the sample continuously, push NaCl or EC to start a
measurement and push NaCl or EC again during the stabilization. The
parameter flashes to indicate the continuous measurement mode.
8 English