accumet AE150 pH Benchtop Meter
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a. The upper display will flash the calibration value briefly before storing the
calibration point in the meter.
b. The lower display will switch to the next calibration buffer value, based on the
selected buffer set.
15. Save the calibration or proceed to the next calibration point.
a. If performing a two point calibration, press the
CAL/MEAS
key to return to the
measurement mode and start taking pH readings.
b. If performing a three point calibration, continue to step 16 (do not press the
CAL/MEAS
key).
16. Rinse the pH electrode with deionized water or rinse solution. If using a separate
temperature probe, thoroughly rinse the temperature probe as well.
17. Select the third pH buffer (i.e. pH 10.01 or pH 9.18) and pour the buffer into a clean
container.
18. Immerse the pH electrode and temperature probe into the third pH buffer.
a. The lower display will update to the pH buffer standard value, based on the
selected buffer set.
19. Wait for the measured pH value to stabilize and the “READY” icon to be shown on
the display.
20. Press the
ENTER
key to confirm the calibration.
a. The upper display will flash the calibration value briefly before storing the
calibration point in the meter.
b. The meter will automatically proceed to the measurement mode after a three
point calibration is completed, unless the number of calibration points is set to
4 or 5 using the P3.0 Program in the Setup mode. In this case, repeat steps
15-20 for the four or five point calibration.
Automatic Buffer Recognition Error
During the pH calibration, if the upper measured pH reading is not
within the acceptable buffer value range for automatic buffer
recognition, the “ERR” error icon and electrode icon will flash when
the
ENTER
key is pressed. Press the
CAL/MEAS
key to exit the
error calibration condition and return to the measurement mode.
Refer to the Troubleshooting Guide section to verify the pH
electrode performance and repeat the calibration.
Accepted Buffer Value Ranges
Buffer Set
Buffer Value Accepted Range
Buffer Set
Buffer Value Accepted Range
USA
1.68
±1.00
NIST
1.68
±1.00
USA
4.01
±1.00
NIST
4.01
±1.00
USA
7.00
±1.50
NIST
6.86
±1.25
USA
10.01
±1.00
NIST
9.18
±1.00
USA
12.45
±1.00
NIST
12.45
±1.00
