Pundit PI8000 Manuel utilisateur

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

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

ddd

(a) (b) (c) (d)

Amplitude

Frequency Frequency Frequency Frequency

Shifted

Peak