Percent Paramagnetic Oxygen Analyzer

Part I: Control Unit

 

 

 

 

 

 

 

 

 

TRAK/HLD Auto-Cal

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- Use the Right or Left arrow keys and select More. Press Enter.

Version Self-Test

Show_Negative=NO

-Use the Right or Left arrow keys and select “Show_Negative=NO”.

-Use the Up or Down key to toggle from NO to YES.

-Press the Escape key twice to return to the analyze mode.

This preference is stored in non-volatile memory, so this configuration is remembered after a power shutdown. If the instrument is cold started, it will go back to default (not showingg negative oxygen readings).

4.4The Zero and Span Functions

Zeroing is not required in order to achieve the published accuracy specification of this unit.

Zeroing will eliminate offset error contributed by sensor, electronics, and internal and external sampling system and improve performance beyond published specification lim- its.

The analyzer is calibrated using zero and span gases.

Any suitable oxygen-free gas can be used for zero gas as long as it is known that it will not react adversely with the sample system.

Although the instrument can be spanned using air, a span gas with a known oxygen concentration in the range of 70–90% of full scale of the range of interest is recommended. Since the oxygen concentration in air is

20.9% (209,000 ppm), the cell can take longer to recover if the instrument is used for trace or less than 1% full scale oxygen analysis immediately following calibration in air.

Connect the calibration gases to the analyzer according to the instruc- tions given in Section 3.4.1, Gas Connections, observing all the prescribed precautions.

Shut off the gas pressure before connecting it to the analyzer, and be sure to limit the pressure to 40 psig or less when turning it back on.

Readjust the gas pressure into the analyzer until the flowrate (as read on the Analysis Unit SLPM flowmeter) settles between 0.5 and 2.4 SLPM (approximately 1-5 scfh).

Teledyne Analytical Instruments

Part I: 4-11

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Teledyne 3010MB operating instructions Zero and Span Functions

3010MB specifications

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