TM 10-6630-246-12&P
TM 09241 B-12&P
(3) Manual calibration with two buffers.
(a)
Loosen cap on storage/soaker bottle (14) and slide bottle off electrode (11). Save for reuse.
(b)
If an air bubble is in electrode (11) tip, shake as you would a clinical thermometer to remove.
(c)
Rinse two beakers (15) three times with demineralized or distilled water.
(d)
Prepare two buffer solutions that will bracket your expected sample pH range.
(e)
Rinse electrode (11) and probe (12) tip in demineralized or distilled water. Shake dry and place into lowest
prepared buffer solution.
(f)
Press power keypad (2) to turn meter on.
(g)
While stirring gently, press cal keypad (4), CALIBRATE is displayed above the main readout and P1 is
displayed in the lower field. P1 indicates that the meter is ready for the first buffer. When the electrode (11) is stable the
ready prompt will be displayed and a temperature corrected pH value for the buffer is displayed. Press the ? (5) or 1 (6)
keypad, the first digit will start flashing. Scroll until the correct first digit value for the buffer appears, press yes keypad (1).
The second digit will start flashing. Scroll until the correct second digit value for the buffer appears, press yes keypad.
Continue until all digits have been correctly entered. The display will remain frozen for two seconds then P2 will be
displayed in the lower field indicating the meter is ready for the second buffer. Remove electrode and probe (12).
NOTE
The hold prompt will be displayed if the electrode remains in the buffer too long after completing
calibration. If this happens, press measure.
(h)
Rinse electrode (11) and probe (12) tip with demineralized or distilled water. Shake dry and place in highest
prepared buffer solution. While stirring gently, wait for a stable pH display, indicated by ready prompt. Press the T (5) or ,1
(6) keypad, the first digit will start flashing. Scroll until the correct first digit value for the buffer appears, press yes keypad
(1). The second digit will start flashing. Scroll until the correct second digit value for the buffer appears, press yes keypad.
Continue until all digits have been correctly entered. SLP appears in the lower field while the actual electrode slope (in
percent) appears in the main field. If slope is out of tolerance, an error code will be displayed. The meter will automatically
advance to the measure mode with MEASURE displayed above the main field. Remove electrode and probe. Press power
keypad (2) to turn meter off.
(i)
Rinse electrode (11), probe (12), beakers (15), and stir rods (20) if used with demineralized or distilled water.
(j)
If storage/soaker bottle (14) is not full, top off with prepared standard pH buffer solution 4.00. Slide
storage/soaker bottle onto electrode (11) and tighten cap. Be sure electrode tip is immersed in buffer solution.
(4) Manual calibration with one buffer.
(a)
Loosen cap on storage/soaker bottle (14) and slide bottle off electrode (11). Save for reuse.
(b)
If an air bubble is in electrode (11) tip, shake as you would a clinical thermometer to remove.
(c)
Rinse a beaker (15) three times with demineralized or distilled water.
(d)
Prepare a buffer solution that is nearest your expected sample pH range.
(e)
Rinse electrode (11) and probe (12) tip in demineralized or distilled water. Shake dry and place into prepared
buffer solution.
(f)
Press power keypad (2) to turn meter on.
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