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MODEL 396/396VP/397/398/398VP SECTION 3.0
START UP AND CALIBRATION
SECTION 3.0
START UP AND CALIBRATION
3.1 SENSOR PREPARATION.
Shake down the sensor to remove any air bubbles
that may be present at the tip of the pH glass bulb. In
most cases, the pH sensor can simply be installed as
shipped and readings with an accuracy of ±0.6 pH
may be obtained. To obtain greater accuracy or to
verify proper operation, the sensor must be calibrated
as a loop with its compatible analyzer or transmitter.
3.2 CALIBRATION USING BUFFER
SOLUTIONS OR GRAB SAMPLES.
The pH sensor-analyzer/ transmitter loop may be
calibrated by submersing the sensor in a buffer solu-
tion (standard solutions of known pH values) or in a
process grab sample whose pH value maybe
checked by a calibrated laboratory or portable pH
meter.
Please refer to the analyzer's or the transmitters
respective instruction manuals for proper cali-
bration procedures.
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