YSI pH1200 - Manual (Page 6)

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5. Rinse the pH and ATC/Temp probe in distilled water and immerse
them in the third buffer solution (either 9.18/10.01 or 4.00/4.01).
Allow temperature reading to stabilize, then press “Slope” key to
calibrate. The “WAIT” icon will flash until the unit detects a stable
reading. Once the instrument calibrates the third point, the unit will
save the calibration and automatically exit the calibration mode.
3-point calibration is complete.
6. The unit calculates and compensates for the pH electrode slope
deviation corresponding to the values of the three calibration
buffers. After calibration, press and hold “Meas. / Effic.” key for
about 3 seconds to display the new electrode efficiency.
CALIBRATION WITH MANUAL TEMPERATURE
COMPENSATION IN THE PH-AUTOLOCK MODE
1. Turn the unit on. Press “Clear” key for 2 seconds, all LCD elements
will light up. The meter clears all calibration values stored in internal
memory.
2. Connect the pH electrode to the BNC connector of the unit, “MAN”
will light up. “pH” and “AUTO” will light up. One of the buffers in the
buffer set will flash.
3. Rinse the pH probes in distilled water and immerse it in the first
buffer solution (6.86/7.00 if doing a multipoint calibration). Adjust
the temperature reading to that of the first buffer using the
“ up”
or “down” keys (0.0 to 60.0 °C). Then press and hold “Stand” key
for 2 seconds to calibrate. The “WAIT” icon will flash until the unit
detects a stable reading. Once the unit calibrates the first point, the
selected buffer remains lit while the remaining two buffers flash. The
unit is ready to be sloped at the second buffer.
Note: If the first buffer solution is 6.86/7.00, at this moment, Press
the “Mode” key, the unit will save the calibration and exit calibration
mode. Single point calibration is complete. If the first buffer solution
is 4.00/4.01, 9.18/10.00, at this moment, the unit will automatically
exit the calibration mode. Single point calibration is complete.
4. Repeat steps 4-6 of “Calibration with an ATC/Temp probe in the
pH-AUTOLOCK mode” for dual and three point calibration.
CALIBRATION WITH AN ATC/TEMP PROBE
IN THE PH-NON-AUTOLOCK MODE
1. Turn the unit on. Press “Clear” key for 2 seconds, all LCD elements
will light up. The meter clears all calibration values stored in internal
memory.
2. Connect the pH electrode to the BNC connector and the ATC/
Temp probe to the ATC/Temp connector of the unit: “ATC” will light
up. Press “Mode” key to select “pH” mode. “pH” is on. One of the
buffers in the buffer set will flash.
3. Rinse the pH and ATC/Temp probes in distilled water and immerse
them in the first buffer solution (6.86/7.00 if doing a multipoint
calibration). Allow temperature and pH readings to stabilize, then
press and hold “Stand” key for 2 seconds to calibrate, the unit
immediately calibrates the first point, the selected buffer remains lit
while the remaining two buffers flash. The unit is ready to be sloped
at the second buffer.
Note: If the first buffer solution is 6.86/7.00, at this moment, press the
“Mode” key, the unit will save the calibration and exit the calibration.
Single point calibration is complete. If the first buffer solution is
4.00/4.01, 9.18/10.00, at this moment, the unit will automatically exit
the calibration mode. Single point calibration is complete.
4. Rinse the pH and ATC/Temp probe in distilled water and immerse
them in the second buffer solution (either 4.00/4.01 or 9.18/10.01).
Allow temperature and pH readings to stabilize, then press “Slope”
key to calibrate. The unit immediately calibrates the second point,
the other buffer solution will flash. The unit is ready to be sloped at
the third buffer.
Note: At this moment, press the “Mode” key, the unit will save the
calibration and exit the calibration. Dual point calibration is complete.
5. Rinse the pH and ATC/Temp probe in distilled water and immerse
them in the third buffer solution (either 9.18/10.01 or 4.00/4.01).
Allow temperature and pH readings to stabilize, then press “Slope”
key to calibrate. The unit immediately calibrates the third point and
the unit will automatically save and exit the calibration mode. Three
point calibration is complete.
6. The unit calculates and compensates for the pH electrode slope
deviation corresponding to the values of the three calibration
buffers. After calibration, press and hold “Meas. / Effic.” key for
about 3 seconds to display the new electrode efficiency.