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 pH or mV 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
membrane.

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 membrane.

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
membrane.

8. Push   to measure the third calibration solution.

When the calibration is good, the display briefly shows 3rd Buffer 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 23 hours or 1-7 days
(default 1 day). 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.

Note: The temperature is not shown during an ORP (mV) measurement when the
temperature probe is not connected.

Push pH or ORP (mV) 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 pH or ORP (mV).
To measure the sample continuously, push pH or ORP (mV) to start a
measurement and push pH or ORP (mV) again during the stabilization.
The parameter flashes to indicate the continuous measurement mode.

8   English