Thermo Scientific ALPHA PH 560 Manual page 24

Thermo Scientific Alpha pH 560
Place the electrode in pH 7.00 buffer. Immerse the
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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 'READY' annunciator when the reading is stable.
Press ENT key to confirm the reading.
The pH Controller moves to the second calibration point.
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The lower display shows next standard buffer value (pH
4.01). Use ▲ and ▼ keys to select your second buffer from
one of the preset values: pH 4.01 or 1.68 or 10.01 or 12.45.
Remove the electrode from the first buffer, rinse and then
immerse it into the second buffer. Allow the reading to
stabilize. LCD shows 'READY' annunciator when the reading
is stable.
Press ENT key (or CAL key) to confirm the reading.
The calibration is completed. The pH Controller re-calculates
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electrode properties based on the calibration. The new slope
(in mV) is shown in the upper display and pH reading at
0mV (pH7.00 ± offset) is shown in the lower display.
Press ENT key to exit from the calibration.
The pH Controller reverts to pH measurement mode.
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NOTES:
• To exit from pH calibration mode without confirming
calibration, Press ▲ and ▼ keys together.
• When confirming the buffer measurement, if the measured pH
value is not within ±1.00pH from selected buffer value, the
electrode annunciator
the display. This error can also occur if non-standard buffers are
used or the electrode has worn out. If this happens, press both
▲and ▼ keys together to restart the calibration beginning from
Step1.
• When calibrating with manual temperature compensation, the
meter automatically changes from the preset 'process
temperature' to the 'calibration temperature'. After leaving the
blinks and ERR indicator appears in
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