1-4 | 3050-SLR Moisture Analyzer
mal mode, the analyzer will automatically switch to sensor savor mode. Once the analyzer
switches to sensor savor mode, it will not switch back on its own.
The sensor saver mode extents the life of the sensor, but provides slower response time.
The analyzer updates every 2.5 minutes instead of 1 minute; however, the analyzer still
responds within speciications. Refer to analyzer speciications in Chapter 2.
Calculation of Dewpoint Values for Hydrocarbon Streams
The calculation of dewpoint values for hydrocarbon streams is covered by several standards.
Because there are differences between the dewpoint values calculated with the older North
American standard (ASTM D1142, which is based on the work published in IGT Research
Bulletin #8) and the new European standard (ISO 18453, which is based on the work pre-
sented in GERG-Water Correlation: GERG Technical Monograph TM14, 2001), AMETEK has
provided a means of using either method in the 3050 SLR product. Speciically, in the gas
list we have cited two separate entries for natural gas. The irst entry is labeled “Natural
Gas”, and will provide dewpoint/frostpoint values consistent with ASTM D1142. The second
entry is labeled “Natural Gas GERG”, and will provide dewpoint/frostpoint values consistent
with ISO 18453. All other aspects of analyzer performance are identical for both of the two
natural gas listings.
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