YSI pH1200 - Manual (Page 7)

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CALIBRATION WITH MANUAL TEMPERATURE
COMPENSATION IN THE PH-NON-AUTOLOCK MODE
1. Turn the unit on. Press “Clear” key for 2 seconds, all LCD elements
will lit 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. Press “Mode” key to select “pH” mode. “pH” is on. 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 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
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 immediately
save and exit
the calibration mode. Single point calibration is
complete.
4. Repeat steps 4-6 of “Calibration with an ATC/Temp probe in the
pH-NON- AUTOLOCK mode” for dual and three point calibration.
p H M E A S U R E M E N T S
To take pH measurements, the pre-selected buffer solution set must
light up, indicating the unit is single-, dual-, or three-point calibrated
and ready for measurements. If buffer solution set flashes, perform a
pH calibration before taking measurements.
MEASUREMENT WITH AN ATC/TEMP PROBE
IN THE PH-AUTOLOCK MODE
1. 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.
2. Press “Mode” key until “pH” and “AUTO” light up.
3. Rinse the pH electrode and ATC/temp probe with distilled water
and immerse in the sample. Remove air bubbles by shaking/stirring
the probe.
4. Press the “Meas.” key. “WAIT” will flash. The unit is waiting for a
stable reading. The display will track the pH value as sensed by the
pH electrode and the ATC/Temp probe.
5. When “WAIT” disappears, the reading is then in “HOLD” mode
and will not respond to further changes from the sample. The pH
value shown is the pH value of the sample at the displayed sample
temperature. Note: For samples that are inherently unstable, the
unit will not AUTOLOCK. In this case, use the pH-NON-AUTOLOCK
mode for measurements.
MEASUREMENT WITH MANUAL TEMPERATURE
COMPENSATION IN THE PH-AUTOLOCK MODE
1. Connect the pH electrode to the BNC connector of the unit. “MAN”
will light up. Set unit to display the sample temperature by pressing
the up and down keys (0.0 to 100.0
°C).
2. Repeat steps 2-5 of “Measurement with an ATC/Temp probe in
the pH- AUTOLOCK mode”.
MEASUREMENT WITH AN ATC/TEMP PROBE
IN THE PH-NON-AUTOLOCK MODE
1. 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.
2. Press “Mode” key until “pH” lights up.
3. Rinse the pH electrode and ATC/temp probe with distilled water
and immerse in the sample. Remove air bubbles by shaking/stirring
the probe.
4. Allow sufficient time for the display to stabilize. The instrument
will display the pH value of the sample at the displayed sample
temperature.
MEASUREMENT WITH MANUAL TEMPERATURE
COMPENSATION IN THE PH-NON-AUTOLOCK MODE
1. Connect the pH electrode to the BNC connector of the unit. “MAN”
will light up. Set unit to display the sample temperature by pressing
the “up” and “down” keys (0.0 to 100.0
°C).
2. Repeat steps 2-4 of “Measurement with an ATC/Temp probe in
the pH NON- AUTOLOCK mode”.