Pundit PI8000 User manual
PI8000
Quick Reference
Keys -Overview
Device ON/OFF
Medium
push (2s)
Power ON / OFF
Very Long
push (8s)
Reboot device
During measurement
Short
push
Arming the probe
–start / resume measurement
Short
push
Disarming the probe
–stop measurement
Wrist strap
connector
USB-C
Battery
Bluetooth dongle
Flat Tip Sensor
High frequency hammer (3 types)
7.5mm, 10mm and 15mm
Low frequency hammer
Hammers
Select the smaller hammer for thinner elements, and the bigger hammer for wider elements
BLUE YELLOW RED
LED -Behaviour
LED behaviour
Battery Status
(when turning
on the device)
Green: single quick blink:
>20%
Red: single quick blink: <20%
Turn on,
awaiting Bluetooth
connection
Green pulsing
Connected,
awaiting arming
(disarmed)
•
Paused
•
Stopped
Blue
pulsing
Armed
•
Resumed
Blue Solid
While measuring
(rod/wheels)
Blue Solid
Errors
Error
Red
pulsing
Device in boot loader mode
Red
-Green alternate pulsing
Battery Charging
While Charging
Green pulsing 0.5Hz
Charged done
Green solid
Error
•
batteries not charging /
not inserted
•
Overvoltage /
overheated
Red solid
One Sensor –Two Applications
Deep Foundations:
-Cast in place piles.
-Driven piles.
Detection:
-Piles with free end.
-Piles with toe in bedrock.
-Short piles.
-Necking.
-Bulging.
-Cracks and voids.
Concrete elements:
-Slab on grade.
-Foundation slab.
- Roof, floors.
-Beams and columns.
-Concrete pavement.
-Walls.
-Tunnels.
Detection:
-Plate thickness and backwall.
-Cracks and voids.
-Delamination.
-Honeycombs.
-Debonding areas.
-PT duct voids.
Pile Integrity Test
Impact Echo Test
Contact Solution –Coupling material
-Clean the surface from dirt and
debris.
-Grind the surface to make it
smoother.
-Place a small portion of putty
(coupling material) in the sensor
tip.
-Change the portion of putty once
it gets dirty.
-Perform minimum 5-10 impacts
per spot.
-Clean the surface from dirt and
debris.
-Grind the surface to make it
smoother.
-DRY CONTACT SOLUTION: Place a
silicon sticker (coupling material)
in the sensor tip and use it as
many times as wanted.
- Once it is broken, replace it with a
new sticker and clean the sensor
tip with the cleaning pen.
- If coupling is not achieved, use
putty.
-Perform minimum 5-10 impacts
per spot.
Putty
Sticker
Pile Integrity Test
Impact Echo Test
Cleaning pen
Technical Principle
Pile Integrity Test
Impact Echo Test
First calibration of speed
Pile Integrity Test
Impact Echo Test
-Select Pile Integrity Mode (0).
-Input the expected length of the
pile (1).
-Perform 5-10 impacts at the top
of the pile.
-Press the calibration button (2).
-Revise that the length shown on
the app (3) matches with the
expected one.
* If the length of the element is not
known, estimate a wave velocity of
4.000m/s.
-Select Impact Echo Spot / Grid
mode (0).
-Input the expected thickness of
the concrete element (1).
-Perform 5-10 impacts in the
surface far away from the sides
(lateral faces, construction joints,
etc).
-Press the calibration button (2).
-Revise that the thickness shown in
the frequency peak (3) matches
with the expected one.
* If the thickness of the element is not
known, estimate a wave velocity of
4.000m/s
(3) Measured
length
Wave velocity
(1) Expected length
(2) Calibration button
(0) Measuring Mode
(3) Measured
thickness
Wave velocity
(1) Expected
thickness
(2) Calibration
button
(0) Measuring Mode
A few examples
*These examples are shown as a reference only and are valid theoretically. However, the signal from a real case scenario can differ and it is the responsibility of the
inspector to correctly identify and interpret it.
Pile Integrity Test
Toe echo in the
same direction as
impact
Pile with free end
Toe echo in
opposite direction
to impact
Toe in bedrock
Expected
length
Short pile
Echo in the
same direction
as impact
Necking –reduction in diameter
Echo in opposite
direction to
impact
Bulging –increase in diameter
Ts
A few examples
Impact Echo Test
*These examples are shown as a reference only and are valid theoretically. The signal from a real case scenario can differ and it is the responsibility of the inspector to
correctly identify and interpret it.
Cracks & Delamination Honeycomb
Plates in contact with soil
Voids in post tensioning duct
Impact Echo Test
Solid 1/4 < d/T < 1/3 d/T > 1/3 d/T > 1/5
Ts
T
ddd
(a) (b) (c) (d)
Amplitude
Frequency Frequency Frequency Frequency
fT
Shifted
Peak
Shifted
Peak
fflaw
fflaw
fflex
(a)
Frequency
fT
fT,shi fted
Solid PT duct fully grouted PT duct with voids
Ts
T
(a) (b) (c)
Amplitude
Frequency Frequency
fTfT,shifted
Frequency
fT
fsteel fvoid
T
(a) (b)
Amplitude
Frequency Frequency
fT
Concrete
Soil
fT
fflex
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