Thermo Fisher Scientific CyberScan pH/Ion 510 - Manual (Page 12)

Instruction Manual pH 510/ Ion 510
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Figure 2: Calibration error
7. Wait for the measured pH value to stabilize (when the [READY]
indicator displays in the left-hand corner).
NOTE
If the upper measured display is not within the buffer acceptable
window (refer to Hint below) an error message and the electrode
icon flash upon pressing the ENTER key. Refer to Section 7,
Troubleshooting Guide. Check electrode condition and recalibrate.
Press CAL/MEAS key to exit calibration and resume to the
measurement mode.
8. Press the ENTER key to confirm the calibration. The upper
display flashes the calibration value momentarily before storing
the calibration point in the meter. The lower display then toggles
between the next calibration buffer values.
9. If you are performing a one-point calibration, press CAL/MEAS
key to return to the measurement mode and start taking pH
readings (see Figure 1).
NOTE
To exit from pH calibration mode without confirming calibration, DO
NOT press ENTER key in step 9. Press the CAL/MEAS key instead.
Two to Five Point Calibration
10. If you are performing a multi-point calibration (i.e. second-point
or more) go to step 11.
11. Rinse the probes with deionized water or rinse solution to avoid
cross contamination, and place them in the next pH buffer, say
pH 4.01 buffer. The lower display of the meter automatically
switches to the pH buffer solution selected.
12. Wait for the measured pH value to stabilize (when the [READY]
indicator displays in the left-hand corner). (see Figure 3).
13. Press the ENTER key to confirm the calibration. The upper
display flashes the calibration value momentarily before storing
the calibration point in the meter. The lower display then switch
to the next calibration buffer value.
14. If you are performing a two-point calibration, then press the
CAL/MEAS key to return to the measurement mode and start
taking pH readings.
15. If you are performing a three-point calibration go to step 16.
16. Rinse the probes with deionized water or rinse solution, and
place them in the next pH buffer as indicated in the lower
display, say pH 10.01 buffer.
17. Wait for the measured pH value to stabilize (when the [READY]
indicator displays in the left-hand corner) (see Figure 4).
18. Press the ENTER key to confirm the calibration. The upper
display flashes the calibration value and then stores the
calibration point in the meter. The meter automatically returns to
the pH measurement mode after a three-point calibration is
performed (since meter is defaulted to 3-point calibration). To
perform four or five-point calibration, you need to select the
calibration points based on the procedure in page 19 before
repeating the calibration procedure as the above.
Figure 3: 2nd-point calibration
HINT: If the selected
buffer value is not within
the accepted window (see
below) from the measured
value: the electrode and
buffer icon blink and ERR
annunciator appears next
to the secondary display.
(See Figure 2 above)
Press CAL/MEAS key to
exit the ERR condition.
Window of Accepted
Values:-
USA 1.68
±1.00
4.01
±1.00
7.00
±1.50
10.01
±1.00
12.45
±1.00
−−−−−−−−−−−−−−−−−−−−
NIST 1.68
±1.00
4.01
±1.00
6.86
±1.25
9.18
±1.00
12.45
±1.00
Figure 4: 3rd- point calibration