Strasbaugh Software Calibration Procedures
Version 4.0 - February 1998 10 - 123
5. Manually rotate the transmitter counterclockwise to unscrew it from its
socket.
Note: The wire will remain connected.
6. Rinse the pH electrode in clean water.
7. Submerse the pH electrode into the pH 4 value buffer solution, gently
stirring the solution for a few seconds, allowing the transmitter’s LCD
display to stabilize.
8. While monitoring the transmitter’s LCD display, adjust the standard
potentiometer:
GOAL #1: The display must read within +/- 0.1 pH of 4 while the
transmitter’s electrode is immersed in a pH 4 buffer solution.
• Using a small screwdriver, rotate the adjusting screw labeled R21
as needed until the transmitter’s display meets the goal.
9. Rinse the pH electrode in clean water and dry with a clean cloth.
10. Submerse the pH electrode into the pH 10 value buffer solution, gently
stirring the solution for a few seconds, allowing the transmitter’s LCD
display to stabilize.
11. While monitoring the transmitter’s LCD display, adjust the slope
potentiometer:
GOAL #2: The display must read within +/- 0.1 pH of 10 while the
transmitter’s electrode is immersed in a pH 10 buffer solution.
• Using a small screwdriver, rotate the adjusting screw labeled R25
as needed until the transmitter’s display meets the goal.
12. Repeat Steps 6. through 11. to check the correction. If needed, repeat
the adjustments until both goals are met.
13. When both goals have been met, reinstall the transmitter.
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