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MODEL 54eA SECTION 12.0
CALIBRATION - pH
10. The screen at left appears if the pH reading in step 9 was changed.
Press Pt2 (F3). Go to step 11.
11. Rinse the sensor and thermometer with water and place them in
buffer 2. Be sure the glass bulb and junction are completely sub-
merged. Swirl the sensor. Press Cont (F3). "Wait" flashes until the
reading stabilizes.
12. The screen at left appears once the reading is stable. Press Edit (F4)
and use the arrow keys to change the reading to the pH of the buffer
at the measured temperature. Press Save (F4) to store the value.
Press Exit (F1) four times to return to the main display.
NOTE
If Hold was activated during calibration, “Hold Mode Activated”
will continue to flash in the main display. Return the sensor to
normal and deactivate Hold. Refer to Section 5.6, step 11.
13. To view the slope and offset press any key to enter the main menu.
Press the key once to move the cursor to "Diagnostic variables".
Press Enter (F4). Press the key six times to scroll through the list
of diagnostic variables. Note that the pH slope is at 25°C.
4.00 pH
Pt. 1
: 4.00pH 25.0°C
Exit Pt 2 Edit
10.01 pH
Pt. 2
: 10.01pH 25.0°C
Exit Edit
NOTE
During calibration, ERROR and WARNING messages may appear. If an ERROR message appears, press
Exit (F1) to leave and return to the previous screen. If a WARNING message appears, press Cont (F3) to
continue the calibration or press Abort (F1) to leave. Continuing the calibration after a warning message
appears may cause substantial errors in the subsequent measurement. Refer to Section 15.9 for assis-
tance.
10.01 pH
Calibrate point 2
Abort Cont
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