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2.1.5.1 Gas Ports
The Envision® gas analyzer ENV100 and ENV200 models have four (4) ports located on the front of the
unit.
Figure 1 ENV100 and ENV200 Port Labels
Port listing from right to left:
Calibrate/Static/Sample port – This port is used to calibrate the unit with calibration gas, to measure
static wellhead pressure, and to sample for gas quality.
Impact Port – This port is used to generate a differential pressure for calculating flow. Do not connect
pressurized calibration gasses to this port.
Available – This port is used to acquire an available (system) vacuum at the monitoring port. Do not
connect pressurized calibration gasses to this port.
Exhaust – This port is used to exhaust the gasses that are pumped through the sample train for
measurement. Only connect an exhaust hose to this port. Do not apply pressure to the exhaust port.
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