Check Zero; Check Spike; Check Span; Figure 7-4. Sample And Calibration Gas Flow Diagram - Thermo Scientific Omni FTIR Multi Gas CEMS Instruction Manual

System Component Description
Pneumatic Panel

Check Zero

Check Spike

Check Span

7-6 Omni FTIR Multi Gas CEMS Instruction Manual
During the check zero mode, the system is configured for sample mode
with the probe zero control valve opened. The CO
flows into the stinger via the cal/zero port. This mode is executed for the
daily system zero check.
During the check spike mode, the system is configured for sample mode
with the probe spike valve open for dynamic spiking operation. The spike
gas flows into the stinger via the cal/zero port at a reduced rate (typically
not more than 10% of the sample flow rate of 6 LPM). This mode is
executed for the daily system spike check.
During the check span mode, the system is configured for sample mode
with the probe span valve open to allow 6 LPM span gas into the stinger
via the cal/zero port. This mode is executed for the daily system span check.
Figure 7–4. Sample and Calibration Gas Flow Diagram
free zero air (6 LPM)
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