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ppbRAE 3000 User’s Guide

Three-Point Calibration

For enhanced accuracy, it is possible to perform a second Span

calibration in addition to the Zero and Span calibrations outlined in

the previous section. Your instrument first must be set to allow this

third calibration. This requires using ProRAE Studio software and a

PC, as well as a higher concentration of calibration gas.

Note: Once the third calibration is set, you do not need to use

ProRAE Studio to allow future 3-point calibrations. Also, you can

only disable 3-point calibration capability by using ProRAE Studio

again.

Perform the Zero and Span calibrations. After the first Span

calibration (Span 1) is completed, the display a second Span

calibration (Span 2) can be performed. The process is identical to the

first calibration. As in the Span 1 calibration, you may exit and return

to the Zero calibration screen if you choose not to perform this

calibration or to abort it.

Note: If a bump test is available, it appears after the last calibration in

the menu. See “Two-Point Calibration,” page 38, for details. Also,

refer to page 49 for details on how to perform a bump test.

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Rae ppbRAE 3000 Specifications

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