ION CALIBRATION GUIDE
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pH Calibration (Using Custom Buffers)
Follow same procedure as below – differences are: 2 point minimum calibration is required, the
primary display in cal mode is manually adjusted to the desired custom buffer value, and any pH
value can be used in any order – but must be at least 1.0 pH unit apart from one another.
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pH Calibration (Using Preset Buffer Group)
1. Turn meter on, press
MODE
if needed for pH measurement mode.
2. Press
CAL
(enter password if required) to enter calibration mode.
3. Rinse the pH electrode with clean water then dip in your pH buffer – the 1st calibration value
must always be 7.00, 6.86, or 6.79 depending on the buffer group used; subsequent values can
be calibrated in any order. Use an ATC electrode for most accurate results.
4. The primary display is the un-calibrated measured value. The 2700 automatically selects the
appropriate value from your buffer group in the secondary display. This value will blink when
the ‘Stable’ indicator appears. Selecting
CLR–C
will clear the existing calibration.
5. Press
to accept calibration. The accepted value will be visible inside of a
beaker icon. % slope is visible after two calibration points have been completed.
6. Repeat steps 3 - 5 with additional pH buffers or press
ESC
to save calibration.
When the specified number of calibration points is met, the pH calibration report page is
automatically displayed.
pH CALIBRATION GUIDE
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Ion Selective Calibration (Minimum 2-Point Required)
1. Press
MODE
for ion measurement mode. “- - - -” indicates no ion calibration
is stored. Press
CAL
.
2. Prepare two or more ion calibration standards. Rinse and dip your ISE into your lowest
calibration standard. Use up/down arrows to match the upper value to your standard
(from 0.001 to 10000).
CONDUCTIVITY CALIBRATION GUIDE
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Conductivity Calibration (Manual Adjustment)
1. Press
CAL
if needed for calibration mode. Rinse electrode then dip into your
conductivity standard – use lowest to highest when using multiple standards.
2. Use up/down arrows to adjust cell constant or press
NEXT
to keep the nominal value
(recommended). Next, adjust the value to match your standard. Press
when ‘Stable’.
The value, Range (R) and the new cell constant are now shown.
3. For multi-point calibration repeat with additional standards.
Press
ESC
to save calibration or press
NEXT
to view the calibration report.
Calibrate one point per range, up to 5 points.
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Conductivity Calibration (Automatic Recognition)
1. Press
CAL
if needed for calibration mode. Rinse electrode then dip into your
conductivity standard – either 84 µS, 1413 µS, 12.88 mS or 111.8 mS.
2. Use up/down arrows to adjust cell constant or press
NEXT
to keep the nominal value
(recommended). Press
when ‘Stable’. The value, Range (R) and the new cell constant
are now shown.
3. For multi-point calibration repeat with additional standards. Press
ESC
to save
calibration or press
NEXT
to view the calibration report. Calibrate one point per range,
up to 4 points.
3. Press
after ‘Stable’ appears. The calibration value is acceptable if it is within
15 to 90 mV/decade and will be visible inside of a beaker icon.
4. Repeat steps 2 & 3 with the next lowest calibration standard (up to 8 standards) or
press
ESC
to save the calibration.
** Refer to your ISE manual for electrode specific instructions and care.
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