Analytical-industries GPR-1200 ATEX Portable Trace PPM Oxygen Analyzer Manuel d'utilisateur télécharger pdf (Page 7)

Moisture & Particulates: Installation of a suitable coalescing or particulate filter is required to remove condensation, moisture

and/or particulates from the sample gas to prevent erroneous analysis readings and damage to the sensor or optional

components. Moisture and/or particulates do not necessarily damage the sensor, however, collection on the sensing surface can

block or inhibit the diffusion of sample gas into the sensor resulting in a reduction of sensor signal output – and the appearance

of a sensor failure when in fact the problem is easily remedied by blowing on the front of the sensor. Consult the factory for

recommendations concerning the proper selection and installation of components.

Moisture and/or particulates generally can be removed from the sensor by opening the sensor housing and either blowing on

the sensing surface or gently wiping or brushing the sensing surface with damp cloth. Caution: Minimize the exposure of ppm

sensors to air during this cleaning process. Air calibration followed by purging with zero or a gas with a low ppm oxygen

concentration is recommended following the cleaning process. Moisture and/or particulates generally can be removed from the

sample system by flowing the purge gas through the analyzer at a flow rate of 4.5-5 SCFH for an hour.

Mounting: The analyzer is approved for indoor use, outdoor use requires optional enclosures, consult factory. Mount as

recommended by the manufacturer.

Gas Connections: Inlet and outlet vent gas lines for ppm analysis require 1/8” or ¼” stainless steel compression fittings; hard

plastic tubing with a low permeability factor can be used percentage range measurements.

Power: Supply power to the analyzer only as rated by the specification or markings on the analyzer enclosure. The wiring that

connects the analyzer to the power source should be installed in accordance with recognized electrical standards. Ensure that is

properly grounded and meets the requirements for area classification. Never yank wiring to remove it from a terminal

connection. AC powered analog analyzers consume 5 watts, digital analyzers 50 watts without optional heaters. Optional 110V

and 220V heaters AC powered heaters consume an additional 100-150 watts; DC powered digital analyzers consume 30 watts,

40 watts with the optional DC powered heater.

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Analytical-industries GPR-1200 ATEX Portable Trace PPM Oxygen Analyzer Manuel d'utilisateur Page 7