Teledyne 501 TRS, Руководство по эксплуатации, Страница: 29 / 111

Teledyne API - T102/501 TRS, Addendum to T101 Operation Manual Pneumatic Connections
27
1. Attach the 1/4" exhaust line to the exhaust port.
CAUTION
The exhaust from the instrument must be vented outside the immediate area or
shelter surrounding the instrument and conform to all safety requirements using
a maximum of 10 meters of 1/4” PTFE tubing.
2. Attach the sample line to the sample inlet port. Ideally, the pressure of
the sample gas should be equal to ambient atmospheric pressure.
NOTE
Maximum pressure of any gas at the sample inlet should not exceed 1.5 in-Hg above ambient
pressure and ideally should equal ambient atmospheric pressure.
In applications where the sample gas is received from a pressurized manifold, a vent must be
provided to equalize the sample gas with ambient atmospheric pressure before it enters the analyzer.
The vented gas needs to be routed outside the immediate area or shelter surrounding the instrument.
3. Attach zero air and span gas supply lines as appropriate (see Figure 3-4
and Figure 3-5).
Zero air and span gas inlets should supply their respective gases in excess of the 700
cc
3
/min demand of the analyzer. Supply and vent lines should be of sufficient length and
diameter to prevent back diffusion and pressure effects.
For this type of analyzer, zero air and span gas are defined as follows:
SPAN GAS
While it is possible to calibrate the T102 using SO
2
as the span calibration gas by setting
the analyzer’s gas measurement mode to SO
2
, TAPI recommends that H
2
S be used and
that calibration operations be carried out with the analyzer’s TRS gas measurement
mode selected. Please note that verifying converter efficiency requires that the
instrument be calibrated on both TRS and SO
2
, and the slope factors compared between
the TRS and SO
2
modes
.
It is recommended that the H
2
S span gas be equal to 90% of the analyzer’s selected
reporting range.
O2 is a quenching agent in fluorescent Sulfur analyzers. If the balance gas is pure
nitrogen, then false positive readings will result, both at zero and span. Therefore the
user should either use cylinders with zero air as the balance gas, or should use higher
concentration cylinders with an N
2
balance, and dilute further with zero air using a
calibrator, such as the TAPI M700.
EXAMPLE: If the selected reporting rang is 0 ppb

500 ppb, an appropriate span gas
concentration would be 450 ppb H
2
S.
Cylinders of calibrated H
2
S gas traceable to NIST-Standard Reference Material
specifications (also referred to as SRM’s or EPA protocol calibration gases) are
commercially available. Table 3-4 lists specific NIST-SRM reference numbers for various
concentrations of H
2
S.
07267B DCN6485