Reed Instruments R3525, Инструкция по эксплуатации

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1. Prepare buffer solutions for calibration. It is recommended to start
with pH 7.00 buffer solution, followed by either pH 4.00 or pH 10.00
(whichever is nearest to the expected sample value). Use the pH 4.00
and pH 7.00 buffer solutions when measurements are expected to
be on the lower side of the pH scale. Use the pH 7.00 and pH 10.00
buffer solutions when measurements are expected to be on the
higher side of the pH scale.
2. Connect the included pH Electrode into the Input (BNC) Jack and
temperature input jack.
3. Turn the meter on by pressing the button.
4. Place the electrode into the pH buffer solution, so that the tip of
the electrode is fully immersed in the buffer solution, and stir at a
moderate, uniform rate.
5. Press and hold the button for approx. 3 seconds to enter
calibration mode.
6. The LCD will display "CAL" indicating the calibration process has begun.
7. The instrument automatically recognizes the solution and calibrates
to that value.
Note:
If the solution is inaccurate by more than 1pH from either the 4, 7,
or 10pH buffer, or if the electrode slope is low or too high, the meter will
abort the calibration ("End" will be displayed).
8.
During calibration, the pH reading flashes on the main display.
9. When calibration is complete, the meter will display "SA", followed
by "End" and resumes normal operation.
10. Repeat steps 4 through 8 for pH 4.00 and pH 10.00 buffer solutions.
11. When the 2- or 3- point calibration is complete, the meter will display
the percentage of slope (PTS), followed by "SA", then by "End" and
resumes normal operation.
Note: If the PTS is below 70% or above 130%, the electrode must be
replaced while a slope of 100% is ideal.
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