Ph Calibration Screens - Nalco 3D TRASAR Series Installation And Operation Manual

Control Alarm
Settings Settings

4.10.4 pH Calibration Screens

Select pH from the Calibration menu and follow screen directions to
perform calibration:
A 1-point calibration
It is best used to fine-tune your calibration to compensate for minor drifting.
A 2-point calibration
major error has developed due to excessive fouling or probe degradation.
For a 1-point calibration
STEP 1 - Leave probe in tee with water flowing. Select 1-point calibration.
STEP 2 - Using a handheld instrument of known accuracy and
calibration, sample the process water and determine the pH
value.
STEP 3 - Enter this value.
For a 2-point calibration
STEP 1 - Select 2-point calibration.
STEP 2 - Close the sample inlet, lower sensor outlet, and 3-way valves.
STEP 3 - Remove the pH probe from the tee.
STEP 4 - Swirl the probe in a beaker of clean, fresh pH 7.0 buffer
solution (P/N
STEP 5 - After prompt, rinse probe well in clean DI water and wipe clean.
STEP 6 - Swirl probe in a beaker of clean, fresh pH 10.0 buffer solution
(P/N 460-S0408.75). Press Continue.
STEP 7 - After successful calibration reinstall probe and open valves.
!
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utilizes the system water as the calibration point.
is best utilized when installing a new probe or if a
460-S0407.75). Press Continue.
If probe calibration is unsuccessful, check standards, wiring
connections, or handheld pH meter for accuracy . Soak probe
in standard extra 5-10 min or clean probe tip and recalibrate.
521-OM0108.88
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