2-Point Calibration - Thermo Scientific Alpha pH 560 Manual

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1.800.561.8187
Note: Refer notes at the end of this section for additional information
and possible error indicators of calibration process

2-Point Calibration:

Figure 4–16. USA Buffer 2-Point Calibration
www.
Place the electrode in pH 7.00 buffer. Immerse the
2
temperature probe in the buffer solution if ATC mode is
enabled. Immerse the potential matching pin in the buffer if
symmetrical mode is enabled. The buffer annunciator
appears in LCD. Lower display shows pH 7.00 (USA
standard buffer). Upper display shows the current
uncalibrated pH reading. Allow the reading to stabilize.
LCD shows 'R R EADY' annunciator when the reading is
stable.
Press CAL key to confirm the reading.
The calibration is completed. The pH Controller re-
3
calculates electrode properties based on the calibration. The
new slope (in mV) is shown in the upper display and pH
reading at 0mV (pH7.00
display.
Press ENT key to exit from the calibration.
The pH Controller reverts to pH measurement mode.
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From pH measurement mode p p ress CAL key to enter
1 1
calibration mode as described in page 16. The LCD shows
'C C AL PH'. P P ress ENT key to begin first calibration point.
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offset) is shown in the lower
Thermo Scientific Alpha pH 560
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