29
To set the Reading Mode:
• Press
while in
pH Measure
mode.
• Press
.
• Use
or
to select the Reading Mode option.
• Press
/
to select Direct / AutoHold option as
desired.
• Press
to cancel operation.
Log
Note:
See section
Logging
for available types of logging.
This option allows the user to edit the logging settings: Logging Type, Logging Data Configuration, Sampling
Period and New Lot.
Logging Type
Three logging types are available: Automatic, Manual and Auto Hold.
Automatic
- the measurement data is logged automatically at predefined time intervals;
Manual
- a snapshot of the displayed measurement data is logged with time stamp when the user manually
depresses Log;
Auto Hold
- this is configured along with the Direct/AutoHold Reading Mode to take a snapshot of stable
measurement data. Press
to initiate a logging session. Press
to initiate an Auto Hold event. The
log occurs automatically once measurement stability is reached. This type log removes subjective data, as it only
captures stable measurements.
To set the Logging Type:
• Press
while in
pH Measure
mode.
• Press
.
• Use
or
to select the Log option.
• Press
and use
or
to highlight the
Logging Type option.
• Press
and use
or
to highlight the
desired option.
• Press
to confirm your selection or press
to
cancel operation.
52
The group of calibration standards is set under ISE Setup
→
Calibration. Select standards that are in the
measurement range of the samples.
To calibrate the instrument:
• Press
. If the instrument was calibrated before and calibration was not cleared, the old
calibration can be cleared by pressing
. After 10 seconds,
will no longer be available.
Note:
It is very important to clear calibration history when a new electrode is used because most errors and
warning messages that appear during calibration depend on calibration history.
• Add ISA to both standard solutions and samples.
• Immerse the Ion Selective Electrode and the temperature probe approximately 2 cm
(1”) into the less concentrated standard solution and stir gently.
• Select the appropriate standard solution concentration with
or
.
For
All Standards
manual entry mode, the standard concentration can be selected
from a list containing all the predefined and custom standards. For
Group Standard
manual entry mode the standard concentration can be selected from the predefined
group of standards. Press
to calibrate the electrode in the standard.
Note
: To adjust standard value: Press
.
A pop-up menu will be displayed on the LCD in which the
concentration value can be adjusted using
or
. Press
to save the new
concentration value.
• The “
Please wait...
” message will appear on the LCD for 10 seconds. Remove ISE from first standard,
rinse tip and immerse the Ion selective electrode and the temperature probe into the next standard
solution and follow the above procedure or press
to exit calibration.
Notes:
• The new added calibration point will replace an old one if the difference between them is less
than 20 % of the standard solution.
• If the existing stored calibration is full (five calibration
points), a pop-up menu will be displayed on the LCD
in which you can select with
or
the
standard solution you want to replace with the current
one. Press
to delete the selected calibrated
point and then press
to update calibration
with the new standard solution.
2 cm
(1”)
