Sample System Prerequisites - Ametek 241CE II Operator's Manual

3-12 | Model 241CE II Hydrocarbon Dewpoint Analyzer

Sample System Prerequisites

The Model 241CE II Analyzer is designed, primarily, to monitor the
hydrocarbon dewpoint (HCDP) temperature in sweet (H2S <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
compensation purposes in the calculation of HCDP measurements.
If your application requires a WDP (or water content – WCT) measure-
ment, 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
NOTE
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
external source, such as the AMETEK Model 3050-OLV Moisture
Analyzer.
!
The analyzer must not be used with explosive gas mixtures (i.e., mix-
tures containing a flammable component and oxygen or gases having
WARNING
a composition below the upper explosive limit).
It is essential that the analyzer and its entire sample system – from the
process pipe on through the solenoid valve – be maintained at a tempera-
ture 15 °C (27 °F) above the highest expected HCDP temperature of the
sample gas stream. The ambient temperature around the analyzer and the
gas flowing 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
requirement, the heating methods and devices must be approved by
WARNING
the local electrical-inspection authority for use in the hazardous loca-
tion.