Thermo Orion 410Aplus, Instruction Manual

Page: 34 / 131

Orion Benchtop pH/ISE Meter Instruction Manual
Calibration and Measurement of Concentration
30
Channel Selection and Electrode Identification
Prior to calibration, select the channel and proper
electrode identification.
1. Press 2nd then channel to select the correct channel. The channel in
use will be identified in the prompt line. Example: 1-pH.
2. Press 2nd then electrode id to select the electrode identification.
3. The meter will present a series of prompts. Follow the instructions to
select the electrode ID noted after the channel in the prompt line.
For example: To select pH, press
1 then yes .
pH Calibration Procedure
1. Press mode until the pH mode indicator is displayed.
NOTE: If you want to exit a menu, at any time,
press 1st then measure.
2. Press calibrate . CALIBRATE is displayed. The time and date of the
last calibration are displayed.
3. After a few seconds ENTER NO. BUFFERS is displayed. Enter the
number of buffers 1 , 2 , 3 , 4 or 5 , then press yes .
4. When the BUFFER 1 prompt appears, rinse electrode(s) and place
into first buffer. Wait for a stable display.
5. When the electrode signal has stabilized, the READY CAL AS
prompt will appear. Press yes if the value is correct for your buffer. If
performing a manual calibration, use the numeric keys to change
the value. Press
yes to enter the value.
6. If more than one buffer was selected, repeat steps 4 and 5 for
each buffer.
7a. If one buffer was selected, the current electrode slope in memory is
displayed at the SLOPE prompt. Press yes or use numeric keys to
enter correct value then press yes . If actual slope is unknown, enter
100.0 or perform a two buffer calibration.
7b. If two or more buffers were selected, the average electrode slope is
displayed at the SLOPE prompt.
8. The meter automatically proceeds to measure mode.
9. Rinse electrode(s) and place into sample. Record the pH value
when READY is indicated or when the electrode signal is stable.
Temperature is displayed in the prompt line.