PN 903-8797, Rev A
Sample System Prerequisites
The 241CE II Analyzer is designed, primarily, to monitor the hydrocarbon dew-
point (HCDP) temperature in sweet (H
2
S <50 PPM) natural gas streams.
The analyzer also monitors the dewpoint temperature of water internally, but
this internal water dewpoint (WDP) temperature is used primarily for compen-
sation purposes in the calculation of HCDP measurements.
If your application requires a WDP (or water content – WCT) measurement, an
external signal must be supplied to the analyzer, which can then display the
required value on its User Interface.
IMPORTANT
Although the analyzer does monitor and can display internal WDP
and WCT measurements, do not set up the analyzer to display these
internal measurements unless it is solely for diagnostic purposes only.
The internal WDP measurement is used only for compensation in the
calculation of HCDP measurements. If your application requires WDP
and WCT measurements, these signals must originate from an exter-
nal source, such as the AMETEK 3050-OLV Moisture Analyzer.
The analyzer must not be used with explosive gas mixtures (i.e.,
mixtures containing a ammable component and oxygen or gases
having a composition below the upper explosive limit).
It is essential that the analyzer and its entire sample system – from the pro-
cess pipe on through the solenoid valve – be maintained at a temperature
15 °C (27°F) above the highest expected HCDP temperature of the sample gas
stream. The ambient temperature around the analyzer and the gas owing
into the Measuring Cell should not exceed 40 °C (104 °F).
If it is necessary to heat any part of the sample system to satisfy this re-
quirement, the heating methods and devices must be approved by the
local electrical-inspection authority for use in the hazardous location.
2-12 | 241CE II Hydrocarbon Dewpoint Analyzer
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