Thermal Conductivity Analyzer | Model 212R |
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Check to see that both the analyzer and recorder are being furnished electrical power. Check to see that the analyzer and recorder fuses are intact. Check all electrical connections outside of the analyzer.
6.1.2Sampling System Checks.
Be sure that there is an adequate supply of reference gas and that the sample and reference path flowrates are correct. Check to see that there are no obstructions in the vent paths from the analyzer. Check all external plumbing connections for leaks with soap water.
6.1.3Summary of Preliminary Checks.
The analyzer inner door should not be opened and no adjustments, beyond manipulationofthenormallyusedcontrols,shouldbemadeuntilalltheafore- mentionedpreliminarieshavebeencompletedandanynecessaryremedial repairseffected.
6.2Loss of Zero Control.
If loss of zero control on Range #1 is experienced during initial startup or after the reference gas supply has been changed, the dynamic balance procedure must be repeated.
Lossofzerocontrol,undersuchcircumstances,indicatesthattheimpurity concentrationwithinthereferencegasisdifferentthanthatofthegasusedduring factory checkout (or the previous cylinder) and does not in itself indicate a defectiveanalyzer.
The analyzer was adjusted at the factory to have a zero balance at close to the midpoint of the zero control potentiometer (dual dial reading of 500) with a commonsourceofhighpuritycylindergassupplyingboththesampleand reference paths of the cell. If the recorder is off scale and cannot be returned with the zero control, the dynamic balance procedure must be employed to restore control before further conclusions as to instrument performance can be made.
18 | Teledyne Analytical Instruments |
