TERMS
OF INTEREST
Gauged (vented) Option. Automatically compensates
for atmospheric changes:
Vent to atmosphere. Why? - Forces on both sides of the pressure transducer
are equalized, providing a more accurate reading relative to ambient atmospheric
pressure.
Compensate
for Barometric Changes. Why? - As barometric pressure changes, water in an
enclosed aquifer will rise and fall in response to the change. This phenomenon
will introduce a margin of error in your readings if not compensated and primarily
affects tests conducted in enclosed aquifers.
All of the electronics
and sensors are completely self contained in the Gauged miniTROLL version. This
configuration is exceptionally durable and made to withstand years of exposure
to harsh downhole conditions. By using a tool with everything you need built in, it Increases Accuracy, and
Reduces Time and Effort to merge barometric data reading corrections to get "True" water levels.
Absolute
(non-vented) Option:
No Need to Compensate for barometric changes in some tests. Why? - When monitoring
an open body of water, or a pressurized water column, there is no need to compensate
for barometric pressure. In the open body of water, the affects of the change
in barometric pressure are insignificant, relative to even the high accuracy recorded
by the miniTROLL. When monitoring a pressurized water column, changes to outside
atmospheric pressure will usually be of no significance to your test.
All of the electronics
and sensors are completely self contained in the Absolute (non-vented) miniTROLL
version. The Absolute miniTROLL may be suspended by either a stainless steel wire
or direct-read cable option. This
configuration is exceptionally durable and made to withstand years of exposure
to harsh downhole conditions. By using a tool with everything you need built in, it Increases Accuracy and Reliability.
Direct
readings
Don't need to remove unit from well to get readings. Why? - In many cases
you will not want to disturb the transducer once you have started to take readings
downhole. The Reliable, Watertight and Easy to Use direct-read cable option for
the miniTROLL allows you to see everything the miniTROLL is detecting and recording
with a simple twist of a connector at the wellhead. By utilizing the direct-read
cable option to examine either real-time or recorded downhole data, your miniTROLL
will remain in the exact same place as when you first positioned it. Your data
will be far more accurate. Here are some more reasons to use the simple direct-read
option for the miniTROLL:
- Readings may
be offset upon reinstallment
- Unit may be
contaminated and unwise to handle
- More chances
for unit to snag in well
- Difficult
to reposition
- Easy to collect
data
- Can connect
to telemetry systems / 3rd-party data loggers / Online / Automation
Wire
Suspension (non-direct reading)
In some cases, you will want to suspend your Absolute (non-vented) miniTROLL
by a thin stainless steel wire. You will want to employ this method when:
- Least Cost
is an issue
- Very High
Security is an issue
- Well contamination
may prevent introduction of poly or FEP downhole cable.
- Longer term
monitoring is being employed
- Atmospheric
compensation is not an issue
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