Analytical-industries GPR-1800 IS ATEX Trace PPM Oxygen Transmitter Manuel d'utilisateur télécharger pdf (Page 14)

Advanced Instruments, Inc

Example 1: As illustrated by Graph A, any error during a span adjustment at lower end of the scale, e.g.,

20.9% (air) on a 100% full scale range, would be multiplied by a factor of 4.78 (100/20.9) when making

measurements close to 100% O2. Conversely, an error during a span adjustment close to the top end of the

range, e.g., at 100% is reduced proportionately for measurements of oxygen concentrations near the bottom

end of the range.

Graph B represents a constant error over the entire measuring range. This error is generally associated with

the measuring e.g., LCD and or calibrating devices, e.g., current simulator or current/voltage measuring

devices.

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Analytical-industries GPR-1800 IS ATEX Trace PPM Oxygen Transmitter Manuel d'utilisateur Page 14