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Installation
Teledyne Analytical Instruments 26
CAUTION: THE GASES USED MUST BE OF THE
HIGHEST QUALITY, ULTRA ZERO GRADES, AS SHOWN
BELOW. FAILURE TO DO SO WILL RESULT IN
CONTAMINATION AND FAILURE TO DETECT LOW
CONCENTRATIONS OF HYDROCARBONS.
AIR: USE ULTRA ZERO GRADE AIR WITH THC LESS THAN
0.1 PPM. DO NOT USE OIL PUMPED AIR UNDER ANY
CIRCUMSTANCES.
FUEL: USE ULTRA HIGH PURITY (UHP) GRADE HYDROGEN
WITH THC LESS THAN 0.5 PPM.
CARRIER GAS: USE ULTRA HIGH PURITY GRADE
NITROGEN GAS, WITH THC LESS THAN 0.1 PPM.
3.3.5.2 EFFLUENT
All the gases introduced into the detection cell vent from one fitting
at the rear of the analyzer. TAI recommends that the cell be permitted to
vent directly to the atmosphere wherever possible.
If a vent line is required, the installation must include a drop-out pot
to collect the water that is formed by the burning of the hydrogen fuel.
The vent line must be constructed so that water and dirt cannot collect in
it.
3.3.5.3
SAMPLE BYPASS VENT
The sample bypassed by the back-pressure regulation system vents
from a separate port at the rear of the analyzer. If a vent line is required,
it must be installed so that water and dirt cannot accumulate in it.
3.3.5.4 FUEL AND AIR CONNECTIONS
The fuel used to provide combustion should be Hydrogen gas, zero
quality with certified THC of less than 0.5 ppm and a pressure of 30
psig. The compressed air, ultra zero gas quality with THC less than 0.1
ppm should be used at a controlled pressure of 30 psig Connect the fuel
and air sources to the instrument according to the gas connection
diagram included at the back of this manual.