Metrohm NIRS XDS Process Analyzer – MicroBundle - Manual (Page 24)

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Safe Pressure
Flow Rate
(both System Types)
US: 0.31 to 11 SCFH
Metric: 0.15 to 5.2 NL/Minute
¼” FPT
NOTE: Large supply lines are recommended to permit adequate airflow. Some loss will occur due to
internal friction. Use ½-inch to 1-inch (12mm to 25mm) supply lines.
3.6.1 Terminology
• SCFM:
The term SCFM stands for Standard Cubic Feet per Minute, referenced to a pre-specified
pressure, temperature, and relative humidity. In most cases, SCFM is referenced to 14.7 PSIA,
68°F, and 0% relative humidity. By specifying these parameters, the mass flow of compressed
air and gas systems is clearly defined.
NOTE:
Be sure that SCFM is correctly converted to Actual CFM. The equivalent information applies to
Metric flow rates also.
• PSI:
Pounds per square inch. PSIA refers to “absolute pressure.”
Conversion factor:1 PSI = 0.07031 kg/sq. cm
• FPT:
Female Pipe Thread (US), NPT tapered thread. The Metric types are either PG (European
Standard) or BSPT (British Standard Pipe Taper). Adapters of the correct thread type must be
used where required, or the seal will not be maintained. Teflon® tape must be used on the
threads for a good seal.
3.7 I/O Connection
• UTP Crossover Cable, Category 5, RJ-45 connection
3.8 Scan Range
The Data Collection Method (DCM) selection ranges are as follows:
• Extended InGaAs detector: 800-2100nm. (Performance Test range 850-2100nm.)
• PbS detector: 800-2200nm.
The test ranges used in Performance Test are somewhat narrowed due to detector and fiber
attenuation parameters.
3.9 Data Interval
• 0.5nm Data Interval
3.10 Clock/ Oscillator Frequencies
• 10 MHz – Amplifier
• 18.423 MHz, 25 MHz and 30 MHz – Mother Board