Orion Benchtop pH/ISE Meter Instruction Manual
Set Up, Self-Test and Check-Out
9
E. Orion 520Aplus and 525Aplus
Check-Out Procedure
1. Perform the self-test.
2. For 525Aplus only
Press 2nd channel until channel 1 is selected
3. After completing the self-test the meter will be in MEASURE mode.
The legend MEAS will be displayed.
NOTE: If this is the first time this procedure has been
performed the reading should be 7.00 ± 0.02.
4. Press 1st mode to display pH.
a. The prompt line on the display should read 25.0˚ C. If not, press
1st set temp and enter 25.0, then press yes.
b. Press 1st calibrate. Enter 1 buffer then press yes. Display should
read 7.00 pH. If not, enter 7.00 and press yes.
c. Meter should display the slope as 100.0 PCT. If not, enter 100.0
and press yes.
d. Meter will return to measure mode. Display should read
7.00 ± 0.02.
5. Press mode to display mV. Display should 0.0 ± 0.2 mV. If not, enter
0.0 and press yes.
For Orion 520Aplus the meter is now ready for use with electrodes.
Remove the shorting cap.
6. For 525Aplus only
a. Press 2nd channel to select input channel 2.
b. Repeat steps 4 and 5 for input channel 2.
For Orion 525Aplus the meter is now ready for use with electrodes.
Remove the shorting cap.
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