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The Envision® gas analyzer ENVAUS model is slightly different in that the yellow “Available” port is now
labeled “Borehole Flow” (see photo below). Instead of measuring available (system) vacuum at this
port, it is used to measure low-level borehole flow instead. The “Calibrate/Static/Sample” port is then
used to measure available (system) vacuum.
Figure 2 ENVAUS Port Labels
2.1.5.2 Cable Ports
Charger port – This port is used to charge the unit with the supplied wall charger. The Envision should
run a full, normal working day without needing to be recharged. Plug the charger in overnight to charge
the unit. It usually takes about 4 hours to fully charge an Envision. The charging circuit will turn off
automatically when the unit has reached a full charge. Do not plug the charger into the unit in an
explosive environment.
Thermistor Port – The wired thermistor plugs in to this port. If you have purchased a wireless
(Bluetooth) thermometer from Elkins Earthworks, it may be used in place of the wired thermistor.
PDA Port – The PDA port may be used to directly connect the Envision to a handheld device (with a
serial port) if Bluetooth is unavailable or not working correctly. A standard 9 pin serial cable may be
used.
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