Sample System Considerations - Teledyne IR7000 Operating Instructions Manual

Installation 3
When there are no leaks in the sample system run span gas through
and then sample gas to check the flow rates. If you are using a bypass
loop, do not set the sample or calibration regulators above 5 psig in an
effort to increase the flow.
3.5

Sample System Considerations

If a sample system is not included with the analyzer, it is the
customer's responsibility for making available a preconditioned (non-
condensing and particle-free) sample gas at 5 psig or less. The temperature
of the gas must be between -10° C (14°F) and 50°C (122°F), preferably at
the same—or close to— the temperature of the instrument.
Calibration gases (zero and span) must be tied into the sample
delivery system in such a manner that the operator, or instrument, if using
the automatic calibration feature, can easily switch from sample to
calibration gas. Standard or custom sample systems can be provided by
LSC. Contact the factory for additional information.
The sample system must be capable of maintaining a constant
pressure. If a pump is used to pull sample/calibration gas through the
system rather than delivering the sample under pressure, then care must be
taken not to induce pressure variations during the measurements or
calibrations.
WARNING: Do not allow the sample or calibration gas pressure to rise above 5
psig. The sample cell is glass(metal optional) and uses special
elastomer O-rings for sealing. At pressures above 5 psig, the cell
can fail or leak. This could result in exposure to harmful gas.
Additional warnings in the form of cautions are presented in this
manual whenever a gas connection is to be made. While cautions
are generally used to describe potential damage to the instrument
or process, the user should keep in mind the potential danger of a
gas leak and it's effect on personnel.
NOTE:
20
To run gas through the sample cell on instruments using the
autocalibration feature, you must apply power to the instrument and
to energize the solenoid valves.
Teledyne Analytical Instruments., - Rev. 3
IR7000