Internal Timing - Ametek 3050-AP User Manual

The 3050-AP has no local user programming functions. It requires serial
communication with an external PC for configuration. Once configured, the
analyzer is capable of stand alone operation. The analyzer is factory config-
ured and packaged with configurator software for initial setup of operating
parameters. For enhanced interface and process monitoring, AMETEK offers
optional System 2000 Software with graphical user interface to record and
process your data in a Windows 95/NT format. User provided software may
also be used with the 3050-AP serial ports.
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 presented
in GERG-Water Correlation: GERG Technical Monograph TM14, 2001), AM-
ETEK has provided a means of using either method in the 3050 OLV product.
Specifically, in the gas list we have cited two separate entries for natural gas.
The first 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.

Internal Timing

The analyzer operates in two timing modes. The normal mode consists of
short intervals of sample and reference gas. The sensor saver mode reduces
the exposure of the sensor to the sample gas by increasing the time spent on
the dry reference.
If the analyzer detects abnormal degradation of sensor proformance over
time in the normal 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 specifications. Refer to analyzer
specifications on page 1-4.
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