Teledyne 102E Subsystem Checkout, Checking the Efficiency of the M501-TRS SO2 Scrubber, Rev A1

TROUBLESHOOTING & REPAIR	M102E/M501 TRS
	(Addendum to M101E Manual - P/N 04740 Rev A)

10.4. Subsystem Checkout

In addition to the information contained in Section 11.5 of the M101E Manual - P/N 04740 Rev A, the following diagnostic procedures are useful for troubleshooting and diagnosing problems with your M102E and M501-TRS.

10.4.1. Checking the Efficiency of the M501-TRS SO2 Scrubber

See Section 8.1.1.2 of this addendum

10.4.2.Checking the Efficiency of the M501-TRS TRS Æ SO2 Converter

To check to see if your TRS Æ SO2 converter is operating properly:

1.Set the analyzer to TRS measurement mode (see Section 6.8.1 of the M101E Manual - P/N 04740 Rev A).

2.Bypass the scrubber inside the M501-TRS.

a.Unscrew the pneumatic fittings from the scrubber.

b.Connect them with a stainless steel or Teflon® union.

3.Supply a gas with a known concentration of SO2 to the sample gas inlet of the analyzer.

4.Wait until the analyzer’s output concentration measurement stabilizes. This can be determined by setting the analyzer’s display to show the TRS STB test function (see Section 6.2.1 of the M101E Manual - P/N 04740 Rev A) TRS STB should be 0.5 ppb or less before proceeding.

5.Record the stable SO2 concentration (Although the concentration is labeled TRS, we are measuring SO2)

6.Supply a gas with a concentration of H2S equal to that of the SO2 gas used in steps 2 through 5 above, to the sample gas inlet of the analyzer.

7.Wait until the analyzer’s output concentration measurement stabilizes. This can be determined by setting the analyzer’s display to show the TRS STB test function (see Section 6.2.1) TRS STB should be 0.5 ppb or less before proceeding.

8.Record the stable TRS concentration

9.Divide the TRS concentration by the SO2 concentration

EXAMPLE: If the SO2 and TRS concentration of the two test gases used is 500 ppb:

Measured SO2 concentration	=	499.1 ppb
Measured TRS concentration	=	490.3 ppb
Converter Efficiency	=	490.3 ÷ 499.1
Converter Efficiency	=	0.982 (98.2%)

54 05514 Rev A1