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

Control Alarm
Settings Settings

4.10.5 ORP Calibration Screens

Select ORP from the Calibration menu and follow screen directions to per-
form calibration.
A 1-point calibration
It is best used to fine-tune your calibration to compensate for minor drift-
ing.
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 ORP value.
STEP 3 - Enter this value.
For a 2-point calibration
STEP 1 - Select a 2-point calibration.
STEP 2 - Close the sample inlet, lower sensor outlet, and 3-way valves.
STEP 3 - Remove the ORP probe the tee.
STEP 4 - Swirl the probe in a beaker of clean, fresh ORP 200 mV buffer
solution
STEP 5 - After prompt, rinse probe well in clean DI water and wipe clean.
STEP 6 - Swirl probe in a beaker of clean, fresh 600 mV buffer solution
(P/N 460-S0933A.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
(P/N 460-S0932A.75). Press Continue.
If probe calibration is unsuccessful, check standards, wiring
connections, or handheld ORP meter for accuracy . Clean the
ORP probe tip and recalibrate.
521-OM0108.88
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