Ph Standardization (With Preset Buffer Group) - Fisher Scientific accumet AB200 Instruction Manual

pH Standardization (With Preset Buffer Group)

5.
For best results, periodic standardization (calibration) with known accurate
standards is recommended prior to measurement. Use standards that bracket
your intended measuring range while including a neutral point (7.00, 6.86, or
6.79). For example, if you expect to measure samples from pH 6.2 to 9.5,
calibration with 4.01, 7.00, and 10.01 will work well.
The following pH calibration buffers in the groups listed below are automatically
recognized:
Buffer Group
USA
NIST
DIN 19267
FSCI
To eliminate temperature errors associated with the pH electrode, attach the
automatic temperature compensation (ATC) probe for best accuracy. Without
temperature compensation, pH accuracy will decrease as samples deviate from
25 ºC and pH 7.
If the pH electrode has been stored dry, soak in storage solution for 10 minutes
before standardization to saturate the pH electrode surface and minimize drift. If
storage solution is not available, use a neutral pH buffer. Do not reuse buffer
solutions after calibration.
1) Turn meter on, press MODE if needed for pH measurement mode.
2) Rinse the pH and ATC electrodes with clean water then submerse in your first
pH standard buffer.
3) Press STD to enter standardization mode.
If the meter is password protected, you will be prompted to
enter a password.
4) The AB meter automatically searches for the appropriate standard from
the chosen buffer group in the secondary display. This value will blink
when the 'Stable' indicator appears. Selecting CLEAR will clear existing
calibration values.
2.000, 4.010, 6.997, 10.013, 12.000
1.678, 4.010, 6.865, 9.184, 12.460
1.090, 3.060, 4.650, 6.790, 9.230, 12.750
1.000, 3.000, 6.000, 8.000, 10.000, 13.000
11
pH Values