Bacharach FYRITE Gas Analyzer CO2 and O2 Indicators Operating & Maintenance Manual

Contents

Bacharach FYRITE Gas Analyzer CO2 and O2 Indicators Operating & Maintenance Manual Manual pdf 14 page image

Instruction 0011-9026Page 10To make a test with the FYRITE, the metal Sampling Tube at one end of SamplingAssembly Hose is inserted into the gas to be analyzed. The rubber Connector Plug atthe other end of the Rubber Hose is then firmly pressed down on the spring-loadedValve of the instrument (See Figure 12). This simultaneously opens a passage into theTop Reservoir and seals off the center bore.Next, a sample of the gas is pumped into the Top Reservoir by squeezing the rub-ber Aspirator Bulb. At least 18 bulb squeezes are required to assure that the rubberSampling Hose and the Top Reservoir of the FYRITE are thoroughly purged of thepreviously analyzed sample. During the 18th Aspirator Bulb squeeze and immediatelybefore releasing Bulb, the finger is lifted from the Connector Plug, which automati-cally returns the Plunger Valve to upper position against its top seat.Refer to Figure 13. With the Valve in this position, the fi nal 60 cc of the gas sample islocked into the FYRITE and the Top Reservoir is opened to the center bore so that thegas sample can pass to the absorbing fl uid. The FYRITE is then inverted, forcing thegas sample to bubble through the absorbing solution which absorbs either CO2 or O2depending on the type FYRITE in use.Refer to Figure 14. The instrument is then turned and held upright. Absorption of theCO2 or O2 by the absorbing fluid creates a suction, which causes the Diaphragm at thebottom to fl ex upward permitting the level of the absorbing fl uid to rise in the centertube an amount proportional to the gas absorbed. The scale indication correspond-ing to the top of the fluid column is then read as a percentage of gas absorbed by theFYRITE fl uid.5.0 APPLICATION INFORMATIONFYRITE Analyzers are available for either Carbon Dioxide or Oxygen analysis, andeach of these models is made in the three scale ranges shown in Section 5.3. All sixinstruments are similar in appearance and size, but they differ in important construc-tion details, as well as in absorbing fl uids.5.1 FYRITE Absorbing FluidFYRITE absorbing fl uid is selective in the chemical absorption of carbon dioxide or ox-ygen respectively. Therefore, the FYRITE’s accuracy is well within the range requiredfor industrial and professional applications, and does not depend upon complicatedsequential test procedures. Furthermore, the FYRITE readings are unaffected by thepresence of most background gases in the sample.The appearance of a dark red fluid fl oating on top of CO2 FYRITE solu tion is entirelynormal. The darker fl uid consists of a small amount of material added to preventexcessive foaming at the meniscus and improves readability.5.1.1 FYRITE Refi ll Fluid (Storage Life, etc.)FYRITE refi ll bottles should be stored at room temperature (70° F [21° C]) in the car-ton provided, and placed in use within one year.NOTE: Before opening refi ll bottle, read the label and makecertain to observe all precautions.