The PetroAlert Model 8900 combines the selectivity of gas chromatography with the sensitivity, broad dynamic range, and hydrocarbon selectivity of a flame ionization detector (FID) providing fast analysis of C1-C5 hydrocarbons and Carbon Dioxide required in Mud Logging for Oil & Gas exploration.

The PetroAlert Model 8900 uses a dual column configuration with timed backflush to vent which is used to strip off moisture and C6+ hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed sample volume is carried to the pre-cut column. Backflush of the pre-cut column is timed from sample injection so that only C1-C5 hydrocarbons are eluted from the pre-cut column to the analytical column. C6+ hydrocarbons on the pre-cut column are then vented. Then a third column is used in conjunction with a second 10-port valve for individual analysis of methane. C1-C5 hydrocarbons are separated on the analytical column and elute to the flame ionization detector (FID) for analysis.
Unit of Measure

Applications

N/A Measurement of C1-C5 and carbon dioxide for oil & gas exploration.

Features

N/A

  • Analysis of C1-C5 Hydrocarbons and Carbon Dioxide for Gas Referencing
  • Automatic baseline adjustment for long-term stability
  • Automatic calibration to a known standard
  • Analog output ranges are user selectable
  • Multipoint sampling options
  • RS-232 and optional LAN

  • Specifications

    Analysis Time

    N/A <300 seconds through Propane, <800 seconds through Pentane

    Detector

    N/A TCD

    Column

    N/A Packed

    Oven Temperature

    N/A 80ºC, Nominal

    Carrier Gas

    N/A Nitrogen, 30 cc/min, Nominal

    Lower Detection Limit

    N/A <50ppm

    Accuracy

    N/A ± 5% (relative) within dynamic range

    Precision

    N/A 2% of Measured Value

    Span Drift (24HR)

    N/A <2% of Full-scale

    Sample Flow Rate

    N/A 250 - 500 cc/min, typical

    Output

    N/A
    Digital: RS-232, optional Local Area Network
    Analog: (1) 0-20ma or 4-20ma loop power supplied, isolated. Selectable for: gas concentration, unintegrated detector signal. Options for up to 20 additional programmable 0-20ma, 4-20ma or voltage outputs: 0-1V, 0-5V, or 0-10V.

    Relays

    N/A (5) User programmable relays for concentration and diagnostic alarms (1A @ 30Vdc). Options for up to 32 additional relays available.

    Inputs

    N/A Optional digital input board for 3 contact closure inputs. Supports start analysis, start calibration, and analyze calibration gas sample.

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