Thermo Scientific 49i, Instruction Manual, Page: 239 / 314

Thermo Fisher Scientific Model 49
i
Instruction Manual 9-1
Chapter 9
Optional Equipment
The Model 49
i
is available with the following options:
• “Internal Sample/Calibration” on page 9-1
• “Ozonator” on page 9-1
• “Zero Air Source” on page 9-1
• “Teflon Particulate Filter” on page 9-2
• “I/O Expansion Board Assembly” on page 9-2
• “Terminal Block and Cable Kits” on page 9-2
• “Cables” on page 9-2
• “25-Pin Terminal Board Assembly” on page 9-4
• “Mounting Options” on page 9-4
Internal
Sample/Calibration
With the Internal Sample/Calibration option, the sample to be measured is
attached to the SAMPLE port and the zero or span gas is attached to the
CALIBRATION port.
Ozonator
The internal ozone generator provides easy determination of zero, precision,
and Level 1 span checks. The ozone level produced is a function of light
intensity at 185 nm and gas flow. The light intensity is varied by changing
the current into the lamp. The gas flow is held constant by a pressure
regulator followed by a capillary.
Zero Air Source
The zero air source option is a convenient system for generating pollutant
free zero gas for O
3
monitoring requirements. This option includes the
pump, filter, filter holder, and Silastic tubing.