Hach POCKET COLORIMETER II, Instruction Manuals

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Standard Calibration Adjust
The Pocket Colorimeter™ II instrument is factory-calibrated and ready for use
without user calibration. Use of the factory calibration is recommended unless the
user is required to generate a calibration. The Standard Calibration Adjust can be
used to meet regulatory requirements.
This feature allows the factory default calibration curve to be adjusted with a
known standard. Use the standard described in the procedure.
1. Place a blank in the meter (in measurement mode). Press
ZERO/SCROLL
.
2. Place the reacted standard in the meter. Press
READ/ENTER
.
3. Press
MENU
, then press
ZERO/SCROLL
until the display shows “SCA”.
4. Press
READ/ENTER
to display the standard calibration adjust value.
5. Press
READ/ENTER
to adjust the curve to the displayed value. The meter will
return to the measurement mode and the Calibration Adjusted icon will appear
in the display window.
If an alternate concentration is used, or if a standard concentration is not given:
6. Repeat steps 1–4.