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5.4 Calibration
Parameters must be calibrated with measurements taken with external testing
devices. Always use digital calibration devices, not the less accurate visual test kits.
Alternatively, standard solutions may be used. Make sure the standard solution is not
expired or contaminated prior to using. Follow the procedures below as instructed.
NOTE:
Always take water for calibration from the sampling valve, NOT from the process
line directly. The analyzer should always be calibrated with water from the same
source.
5.4.1 Temperature Calibration
Calibration o temperature requires an accurate external thermometer.
1. Place the external thermometer in the flow cell or place both the PT-100 and
thermometer in the same sample.
2. Wait for temperature readings to stabilize.
3. Press menu (Operator menu) until "Temp Calibrated to" (#17) appears in the
LCD display.
4. Press OK.
5. Enter the password (operator or technician password). Press the up arrow or
down arrow until the password is reached.
6. Press OK.
7. The value that appears is the last calibrated value.
8. Press OK again.
9. Press the up arrow or down arrow until the value is the same as the
independent digital thermometer.
10. Press OK to save the new calibration or Esc to abort without saving.
11. Press Esc to return to the main display.
