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Figure 43. Lock-on Scan Spectrum
6.6.2. Demand scan mode
The Demand Scan Mode interrupts regular scanning to conduct two scans of the selected
area. Normal area scanning resumes automatically.
Demand Scan is intended for the following uses:
• To provide a quick means of monitoring any area during an emergency and reporting
the levels of hazardous gases.
• To help identify the chemical composition of unknown odors in the workplace, whether
they are a monitored component or not.
• To later store the infrared spectrum of the air sample from the selected area for offline
identification work, e.g., using spectral search software.
The Demand Scan menu, Figure 44, is identical to Lock-on Mode, and selections are
made similarly. Only areas with green boxes can be selected. Areas with greyed-out boxes
cannot be selected.
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