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Figure 7: Configuration using Soda Lime for CO
2
Zero calibration.
Figure 8: Configuration using Silica Gel for H
2
O calibration
CO2 Zero and CO2 Span Procedure
Tools required: CI-340, Soda Lime external conditioning tube, filter, hose barbs, a CO2 standard gas
ranging from 200-1000 ppm, a t-junction, and a flow regulator.
1. Power on the instrument
2. Connect the soda lime tube, filter and green loop-back tube (Fig.1&2) (for Control Modules: set the
AD CO2 and H2O to zero)
3. Use the up/down arrow to navigate to “Calibrate CO2”
4. Press start/enter
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