OHAUS a-AB33EC, Instruction Manual

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EN-14 Analyzer and Bench Meter
3.2.3 Perform 3-point calibration
Repeat the steps for performing a 2-point calibration to perform a 3-point calibration
using a third buffer.
If you use an a-AB41PH model, you can repeat the previous steps and continue to finish
a 5-point calibration.
3.2.4 Perform an ORP electrode calibration
To perform an ORP calibration:
1 Prepare the electrode according to the instructions in the electrode manual.
Connect the electrode to the meter/analyzer.
2 Touch the mode area one or several times to select
ORP
.
3 Touch the icon on the screen.
4 Touch
ORP
if you are using an a-AB33M1 model. Skip this step if you are using
other models.
5 Follow the instruction on the screen to rinse the electrode, place it in a standard
solution, stir 5 seconds, and wait for 30 seconds.
6 Press the button when you finish the previous step to start calibration. The
icon on the screen starts to blink during the process.
Note
:
 Calibration starts with the Auto End Point Mode.

Pressing the button during the calibration can cancel the process.
7 The meter reaches endpoint automatically.
a) Touch
Finish
to complete the calibration, and the calibration result will be
shown (e.g. 433mV, ±3mV, 430mV, 25°C).
b) Touch
Recalibration
if you want to re-calibrate and repeat the previous
steps.
Note
:
 Pressing the button can cancel the calibration and return to
measurement screen.

Touch the icon to print the result if you connect the meter to a printer or
a computer.