MEMS Digital Inclinometer System with Android
Instruction Manual
ICM0099A
8
6. Once the probe is at the desired depth, place the cable grip on the top of the casing
and hang the cable by the aluminum crimps. The objective is placement
repeatability within 5mm (0.25 inch). This is extremely important to ensure accurate
and repeatable results.
7. The probe will begin profiling the borehole from the bottom of the borehole. After
each respective measurement has stabilized and a recording has been taken, pull
the probe upwards to the next desired measurement depth. If you accidentally pull
the probe too far, lower the probe back down to the previous measurement depth,
and then pull it back to the next intended measurement depth. This procedure
ensures that the readings will remain consistent. For maximum measurement
repeatability, keep the cable as clean as possible during this process. If possible, a
tarp or basket can be useful to avoid placing the cable directly on the ground.
8. Allow the readings to stabilize at each location. Reading stability can be gauged by
both the noise bar and the standard deviation, which are displayed on the Readings
List (Section 4.3.7).
9. Once the readings have stabilized, press the
Accept
button and move the probe to
the next interval as prompted by the software.
10. Repeat Steps 7-9 until the probe reaches the top of the borehole. The App will then
prompt you to turn the probe 180 degrees and repeat the survey, this time in the A-
direction (i.e. with the lower probe wheels in the A+ groove).
Warning
When the probe has reached the top of the casing, avoid allowing the wheel
assemblies to snap out of the casing. As the wheels reach the top, grasp them
with your hand and release the wheel assembly slowly until it reaches the stops.
Failure to do so will damage the shear pin and subject the MEMS
accelerometers to sudden shock, which can damage them and affect the
calibration of the probe.
Warning
Do not drop the cable aluminum crimps onto the cable grip. The cable has very
little stretch, especially near the top of hole, and the impact on the cable crimps
may “hammer” them out of position or break the cable. This effect has been
demonstrated for drops as little at 70 mm.
Warning
Never tightly coil or sharply bend the cable during this process, as this can cause
permanent coiling or twisting of the cable which can impact the spacing of the
aluminum crimps and measurement repeatability. It is recommended to lay the
cable in a “figure-8” or “spaghetti bowl” pattern as follows:
a.
“Figure-8” Cable Management
: As the probe is brought up-hole, lay the
excess cable on a clean surface in alternating loops to form a figure-8 pattern.
The loops of the figure-8 should be approximately the size of the cable reel
diameter. Once the survey is complete, flip over the bundled figure-8 of cable
for easy spooling back onto the reel.
b.
“Spaghetti Bowl” Cable Management
: As the probe is brought up-hole, allow
the cable to freely coil as it is laid on a clean surface. Do not attempt to twist
or coil the cable, as this can deform the cable with repeated use.
