Single Point Calibration (Spc) - Alpha Moisture Systems SADPmini2-Ex User Manual

6.3 Single Point Calibration (SPC)

The SPC facility allows users to check the reading of the instrument against a
"standard reference gas" or instrument, such as a chilled mirror unit, at a particular
value that may be considered to be critical, and make any adjustment necessary to
give agreement with that "standard reference." Rather than making the adjustment
to the span of the instrument, as with AutoCal, the SPC adjustment is made by
introducing a two-part straight-line response curve with a break point at the set
point, or "standard reference."
An AutoCal must be carried out before performing an SPC
1. Measure the value of the reference gas with the instrument in the normal way
allowing the instrument to reach equilibrium and note the indicated value and the
stated value of the "standard reference."
[For example, the instrument reads -46°C dewpoint, and the "standard reference
gas" is certified by the gas supplier as being -48°C dewpoint].
2. The instrument can now be removed from the gas sample, to conserve the
reference gas.
3. Select the Settings icon ① from the Navigation Carousel to display the Settings
screen.
4. Using the Navigation keys highlight the SPC setting ②.
5. Select OK ③ to display the SPC screen ④. NOTE: The Read Value ⑤ dialogue box
will be automatically highlighted.
6. Select OK ③.
7. Using the navigation keys input the required Read Value ⑤.
8. Select OK ③ to exit.
9. Using the navigation keys highlight the Reference dialogue box (6).
10. Select OK ③.
11. Using the navigation keys input the required Reference ⑥.
12. Select OK ③ to exit.
13. Using the navigation keys highlight the SPC Enabled/ Disabled dialogue box ⑦.
14. Select OK ③ to enable or disable SPC. NOTE the secondary screen reading changes.
15. Using the navigation keys display the blue tick ⑧.
16. Select OK ③ to save the SPC settings. The SADPmini2-Ex defaults to the Settings
screen ⑨.
SADPmini2-Ex User Manual
NOTE
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