Thermo Orion 410Aplus, Instruction Manual

Page: 37 / 131

Orion Benchtop pH/ISE Meter Instruction Manual
Calibration and Measurement of Concentration 33
B. Orion 710Aplus Concentration Calibration and
Measurement
Concentration Calibration Procedure
1. Press mode until the CONC mode indicator is displayed.
2. Add ionic strength adjuster, or pH adjuster, to the standards and
samples as recommended in the appropriate electrode
instruction manual.
3. Rinse electrode(s) and place into the least concentrated standard.
4. Press 2nd then cal . CALIBRATE and the time and date of the last
calibration will be displayed. After a few seconds P1 will be
displayed indicating the meter is ready for the first standard.
NOTE : If you want to exit this menu, at any time,
press measure .
5. When the reading is stable, enter the value of the standard, press the
scroll keys or . The value will flash. Press or again. The
decimal point will flash. Position the decimal point using or ,
then press
yes . The first digit will flash. Scroll to the desired value,
then press yes. Continue for each digit on the display. There are 4 1/2
digits plus a polarity sign and decimal point. The display will freeze
for three seconds, then P2 will be displayed in the lower field.
6. If two or more standards were selected, rinse electrode(s) and repeat
step 5 for each standard. When the reading is stable, enter the value of
the standard as above. The reading will freeze for three seconds, then
P3 will be displayed in the lower field. The meter is now ready
for the third standard.
7. After the last standard, press measure . The electrode slope will be
displayed for a few seconds, then the meter advances to measure
mode. If five (5) standards have been entered, the meter automatically
displays the slope, then advances to measure mode.
8. Rinse electrode(s) and place into sample. Wait for the RDY prompt to
appear. Record concentration directly from the main meter display.
Temperature is displayed in the lower field.
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