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Installation and Operation Manual
SA-BC
Adjustable support for bars and cylinders
ATCP Physical Engineering
Rua Lêda Vassimon, n° 735-A - Ribeirão Preto - SP / Brasil – CEP 14026-567
Telephone: +55 (16) 3289-9481
www.atcp-ndt.com
Sonelastic® Solutions SA-BC Adjustable support for bars and cylinders
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Installation and Operation Manual
SA-BC
Adjustable support for bars and cylinders
Manufactured by:
ATCP do Brasil – Alves Teodoro Cerâmicas Piezoelétricas do Brasil Ltda. ME.
ATCP Physical Engineering
Rua Lêda Vassimon, 735-A
Ribeirão Preto – SP, Brasil
CEP 14026-567
CNPJ: 03.970.289/0001-60
Inscrição estadual: 797.013.492.110
Brazilian Industry
www.atcp-ndt.com
Copyright
Copyright © 2014 by ATCP Physical Engineering
All rights reserved.
ATCP reserves the right to change the product or this manual without notice.
Version 4.9
April/2015
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TABLE OF CONTENTS
1. Introduction ................................................................................................. 05
2. Definitions .................................................................................................... 05
3. Features and applications ............................................................................. 05
4. Configurations, parts, accessories and optional items .................................. 06
5. Identifying the parts ..................................................................................... 08
6. Specifications ............................................................................................... 09
7. Sample ......................................................................................................... 10
7.1 Recommended proportions and typical dimensions ...................................... 10
7.2 Placing the sample .................................................................................. 11
8. Equipment installation ................................................................................... 12
8.1 Requirements ........................................................................................ 12
8.2 Typical arrangements .............................................................................. 12
8.3 Mounting the MICROPHONE in the VERTICAL BASE and STURDY TRIPOD ...... 15
8.4 Changing the SUPPORT-CABLE set ............................................................ 16
8.5 Installing the IED AUTOMATIC ELECTROMAGNETIC IMPULSE DEVICE............. 17
9. Equipment operation ..................................................................................... 18
9.1 Positioning the sample ............................................................................. 18
9.2 Positioning the MICROPHONE for acoustic signal acquisition ......................... 19
9.3 Positioning the IED AUTOMATIC ELECTROMAGNETIC IMPULSE DEVICE .......... 20
10. Acquisition and excitation modes ................................................................ 21
11. Warnings and equipment transportation ..................................................... 23
12. Maintenance and troubleshooting ................................................................ 23
13. Symbology ................................................................................................... 24
14. Technical support and warranty ................................................................. 24
15. Statement of Responsibility ......................................................................... 25
Notes ................................................................................................................. 26
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1. Introduction
ATCP Physical Engineering equipment and products have been projected and manufactured
to provide a long-lasting and top-rated performance. This Installation and Operation Manual
contains all necessary information regarding the use and maintenance of this equipment.
Carefully read this manual before using the equipment. Improper use
may damage the product and compromise its performance.
2. Definitions
Impulse Excitation Technique: The Impulse Excitation Technique is a non-destructive test
to determine the elastic moduli and the damping of materials using their resonance
frequencies. This technique is described in the ASTM E1876 and correlated standards.
Resonance Frequencies: Natural frequencies of vibration of a sample.
Elastic Modulus: Elastic modulus is defined as the slope of the stress-strain curve at the
elastic region, as described by Hooke’s Law.
Damping: Damping is the phenomenon by which mechanical energy is dissipated in dynamic
systems. It is directly linked to the presence of defects and the microstructure of a material.
3. Features and applications
SA-BC Support is an apparatus employed to hold samples to non-destructively measure
Young’s Modulus and damping of materials through the Impulse Excitation Technique,
following the ASTM E1876 and correlated standards. SA-BC Support was developed to be
used alongside Sonelastic® Solutions.
SA-BC Support allows rectangular and cylindrical samples to rest on the nodal lines of the
fundamental flexural vibration mode (for a sample of length L, these nodal lines are 0.224L
distant from the ends of it). Based on the size and weight of the sample to be tested, this
support offers a practical system to adjust the distance between the SUPPORT-CABLES, as
well as the tensile stress applied on them. SA-BC Support also allows tests based on torsional
and longitudinal vibration modes for bars and cylinders.
To employ the Impulse Excitation Technique with greater precision and practicality, SA-BC
Support may be combined with IED AUTOMATIC ELECTROMAGNETIC IMPULSE DEVICE and
STURDY TRIPOD.
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4. Configurations, parts, accessories and optional items
SA-BC Support is available in both Manual and Automatic configurations. Optional items are
offered to customize the Sonelastic® Solutions to the specific needs of each client.
Manual Configuration
Parts:
[01] – SA-BC SUPPORT.
[02] – CA-PD MICROPHONE WITH A VERTICAL
MOUNTING BASE.
Accessories:
[03] – SPARE SUPPORT-CABLE SET.
[04] – HEIGHT-ADJUSTING DISC.
[06] – MANUAL IMPULSE DEVICE OF MEDIUM IMPACT.
[07] – MANUAL IMPULSE DEVICE OF LIGHT IMPACT.
Optional Items:
[05] – STURDY TRIPOD.
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Automatic Configuration
Parts:
[01] - SA-BC SUPPORT.
[02] - CA-DP MICROPHONE.
Accessories:
[03] - STURDY TRIPOD.
[04] - SPARE SUPPORT-CABLE SET.
[05] – HEIGHT-ADJUSTING DISC.
[06] - CONTROL OF THE IED AUTOMATIC
ELECTROMAGNETIC IMPULSE DEVICE.
[07] – ACTUATOR OF THE AUTOMATIC
ELECTROMAGNETIC IMPULSE DEVICE IED.
[08] - MANUAL IMPULSE DEVICE OF MEDIUM
IMPACT.
[09] - MANUAL IMPULSE DEVICE OF LIGHT IMPACT.
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5. Identifying the parts
SA-BC Support
01- SUPPORT BASE.
02- SUPPORT-CABLE TIGHTENER.
03- SPARE SUPPORT-CABLE SET*.
04- LEVELING FEET.
05- MOBILE SUPPORT BASE.
06- FIXED TERMINAL OF THE SUPPORT-CABLE.
07- SUPPORTING SLEEVE FOR THE SUPPORT-CABLE.
08- FIXED POSTERIOR SUPPORT-TUBE.
09- SLIDING SUPPORT-TUBE.
10- SUPPORT-CABLE.
11- SAFETY CABLES.
12- FIXED ANTERIOR SUPPORT-TUBE.
* Two sets of cables are provided (a Ø1.2 mm cable, for heavy samples, and a Ø0.7mm cable, for light samples)
CA-PD MICROPHONE
01- MICROPHONE.
02- P3 PLUG (3.5 mm).
03- FLEXIBLE CABLE.
04- CABLE GLAND.
05- MICROPHONE FRAME.
06- VERTICAL MOUNTING BASE*.
07- HEITGH-ADJUSTING DISC**.
* The VERTICAL MOUNTING BASE allows positioning the MICROPHONE on the vertical, directly below
the SAMPLE, for measurements under the manual configuration.
** The HEIGHT-ADJUSTING DISC should be used to balance CA-DP MICROPHONE and ̸ or IED Impulse Device heights, when testing lightweight samples.
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STURDY TRIPOD*
01- FRAME.
02- ARTICULATED TRIPOD.
03- HANDLE FOR SECURING THE TUBE.
04- PILLAR.
05- HANDLE FOR THE TUBE ARTICULATION.
06- MICROPHONE CLIP.
07- INNER TUBE.
08- HANDLE FOR THE INNER TUBE ARTICULATION.
09- OUTER TUBE.
10- HANDLE FOR THE OUTER TUBE ARTICULATION.
11- CABLES ORGANIZER.
* The STURDY TRIPOD is supplied together with the equipment in automatic configuration and it is optional for the equipment in manual configuration to measure the longitudinal vibration mode.
6. Specifications
Maximum dimensions for cylindrical samples (L x D) ........................ 550 x 200 mm
Minimum dimensions for cylindrical samples (L x D) ........................ 100 x 5 mm
Maximum dimensions for rectangular samples (L x W x T) ................ 550 x 170 x 170 mm
Minimum dimensions for rectangular samples (L x W x T) ................. 100 x 5 x 5 mm
Maximum weight when using Ø 0,7mm SUPPORT-CABLE ................... 10 kg
Maximum weight when using Ø 1,2mm SUPPORT-CABLE ................... 30 kg
Aperture between the support rods (maximum - minimum) .............. 200 – 62 mm
Aperture between the SUPPORT-CABLES (maximum - minimum) ...... 275 – 15 mm
Support dimensions (L x W x T) .................................................... 360 x 522 x 270 mm
Support weight without a sample ................................................... 4.6 kg
Working temperature range ........................................................... From -5 to +50 °C
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7. Samples
7.1 Recommended proportions and typical dimensions
Minimum proportions must be observed to avoid the coupling between samples vibration
modes. In addition, proportions determine the pattern of frequency spectrum of acoustic
response. Users are advised on standardizing the proportions to facilitate the correct
identification of frequencies. The table below presents the recommended typical proportions
for bars and cylinders.
Geometry Recommended Proportions Typical Dimensions
Cylinder
𝐿
𝐷≥ 2
The ratio between length (L) and
diameter (D) must be greater than or
equal to 2.
(L x D)
- 100 x 50
- 150 x 75
- 200 x 100 mm
- 300 x 150 mm
- 500 x 50 mm
Square Section Bar
𝐿
𝐴≥ 3
The ratio between length (L) and edge
(A) must be greater than or equal to 3.
(L x A x A)
- 150 x 25 x 25 mm
- 150 x 40 x 40 mm
- 250 x 80 x 80 mm
- 500 x 50 x 50 mm
Rectangular Section Bar
𝐿
𝑊 4
The ratio between length (L) and width
(W) must be greater than or equal to 4.
𝑊
𝑇≤ 8
The ratio between width (W) and
thickness (T) must be less than or equal
to 8.
(L x W x T)
- 150 x 30 x 10 mm
- 150 x 37,5 x 5 mm
- 300 x 60 x 20 mm
- 500 x 100 x 35 mm
Important observations for preparing and finishing the samples:
- The recommended dimension tolerance is 2%;
- Faces should be flat and parallel;
- Corners should not be rounded.
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7.2 Placing the sample
The sample should be symmetrically supported and placed over the SUPPORT-CABLES, with
those at a distance of 0.224 L from the sample ends (L is the length of the sample). For
instance, if a sample’s length (L) is 100 mm, the SUPPORT-CABLES should be positioned at a
distance of 22.4 mm from the ends. The positions of 0.224 L correspond to the nodal lines of
the flexural vibration mode.
Support and typical positioning for a cylinder.
Support and typical positioning for a bar.
The corresponding distance calculation of 0.224 L is automatically generated and informed by
Sonelastic® Software. Markings on the sample are generally done by using a pencil and a ruler
or caliper ruler. The SUPPORT-CABLES position is adjusted by dislocating the fastening
terminals.
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8. Installing the equipment
8.1 Requirements
- The workbench must be flat and leveled with a free gap of at least 60 x 120 cm (depth
and width). This gap should be enough to fit SA-BC Support, samples, computer and
optional items that these may be combined with.
- A 127 or 220 VAC three-pin ground wired electrical mains plug. This pug is needed to feed
the computer and other optional items that may be combined with the use of SA-BC
Support.
The equipment installation consists of positioning it over the workbench and coupling the
MICROPHONE to the VERTICAL BASE or STURDY TRIPOD. Following that, choose the
SUPPORT-CABLES and put them together.
8.2 Typical arrangements
Typical SA-BC Support arrangements are presented next.
[1]
Configuration: Manual.
Impulse: Manual.
Sample: Light square section bar. Microphone: Using the VERTICAL MOUNTING BASE and the HEIGHT-ADJUSTING DISC for optimum signal
acquisition of the flexural mode. Impulse Device: Manual and of light impact.
[2]
Configuration: Manual. Impulse: Manual. Sample: Heavy cylinder. Microphone: Using the VERTICAL
MOUNTING BASE but without the HEIGHT-ADJUSTING DISC for optimum signal acquisition of the flexural mode. Impulse Device: Manual and of medium impact.
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[3]
Configuration: Manual. Impulse: Manual. Sample: Medium sized rectangular
section bar. Microphone: Using a STURDY TRIPOD (an optional item to be used in manual configurations) for optimum signal acquisition of the longitudinal mode.
Impulse-device: Manual and of medium impact.
[4]
Configuration: Automatic. Impulse: Automatic. Sample: Light squared section bar.
Microphone: Using a STURDY TRIPOD for
optimum signal acquisition of the flexural mode. Impulse Device: IED Automatic Electromagnetic Impulse Device with a HEIGHT-ADJUSTING DISC.
[5]
Configuration: Automatic.
Excitation: Automatic. Sample: Heavy cylinder. Microphone: Using a STURDY TRIPOD for
optimum signal acquisition of the flexural mode. Impulse Device: IED Automatic Electromagnetic Impulse Device without a HEIGHT-ADJUSTING DISC.
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[6]
Configuration: Manual. Excitation: Manual torsional mode. Sample: Heavy cylinder.
Microphone: Using a STURDY TRIPOD for signal acquisition under both torsional and flexural modes.
Impulse Device: Manual and of medium impact.
[7]
Configuration: Automatic.
Impulse: Automatic. Sample: Medium-sized.
Microphone: Using a STURDY TRIPOD for optimum position of the flexural mode.
Impulse Device: IED Automatic Electromagnetic Impulse Device with a HEIGHT-ADJUSTING DISC.
Note: In the typical arrangements presented, the optimum support form for the flexural mode
is also proposed for torsional and longitudinal modes. Nodal lines and the ideal support for
these vibration modes, however, do not match the ones for the flexural mode. The longitudinal
mode, for example, is not sensitive to the cables supporting positions (when faces are free)
and the sensitivity of the torsional mode is less than 1%. As a result, it is possible to use the
flexural mode boundary conditions to characterize the longitudinal and torsional modes
efficiently, without compromising the results.
Attention! Before using SA-BC Support, verify if it has been fitted with
its four rubber feet and that those are secure (not wobbly) on the
workbench. If any of its feet is not flat on the workbench, readjust it
until all feet are securely placed and flat on the workbench.
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8.3 Mounting the MICROPHONE in the VERTICAL BASE and STURDY TRIPOD
VERTICAL BASE:
Step 01: Insert the MICROPHONE in the VERTICAL MOUNTING BASE ensuring the wire
goes out through the side opening, as pictured bellow:
Step 02: Press the BASE against the MICROPHONE until it feels coupled and secured to
the BASE.
STURDY TRIPOD:
Step 01: Insert the MICROPHONE in the STURDY TRIPOD microphone clip, as pictured
below:
Step 02: Slide the MICROPHONE into the clip until the whole microphone frame is fully
secured, then place its cable over the STURDY TRIPOD inner tube.
Step 03: Connect the MICROPHONE to the computer’s audio input.
8.4 Replacing the SUPPORT-CABLE set
The thinner the SUPPORT-CABLE, the smaller is its interference on measurements. However,
observe the maximum weight than can be held by each of the two SUPPORT-CABLES
available. SA-BC Support is factory supplied with a Ø1.20mm SUPPORT-CABLE set, which
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would have already been installed (this is the recommended cables to be used with samples
weighting between 10 and 30kg). To replace them for the Ø0.70mm SUPPORT-CABLES
(recommended for samples weighting up to 10kg), follow the steps described next:
Step 01: Turn the SUPPORT-CABLE tightener anti-clockwise until the SUPPORT-CABLE is
completely loose. Hold by the hook when turning the tightener to stop the
cable from turning together with it;
Step 02: Disconnect the SUPPORT-CABLE ends (eye nuts) from the respective hooks
(tightener terminal and fixed terminal);
Step 03: Repeat the previous steps to uncouple the other SUPPORT-CABLE;
Step 04: Hold the new SUPPORT-CABLE to be used and couple the eye of one of its ends
to the fixed terminal hook;
Step 05: Maintaining the new cable under a slight tension, place it on the tubes,
ensuring it fits perfectly the chute of each one of the three supporting sleeves
of the SUPPORT-CABLE. Next, couple the other cable eye nuts to the tightener
terminal hook;
Step 06: Holding the hook as illustrated in Step 01, turn the tightener clockwise so that
the new SUPPORT-CABLE is completely tensioned;
Step 07: Repeat the previous steps to fit the other SUPPORT-CABLE.
For light samples (weighting up to 10kg), tension the SUPPORT-CABLES until fully stretched.
The sliding support tube allows the fine adjustment of tension on the SUPPORT-CABLES. For
heavy samples, adjust the tension on the cables so that, when the sample is placed over
them, it will only go down about 15 mm from its initial position, as pictured below:
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The tension on the SUPPORT-CABLES should be reduced if heavy samples shift down less
than 15 mm.
8.5 Installing the IED AUTOMATIC ELECTROMAGNETIC IMPULSE DEVICE
Before installing the IED AUTOMATIC ELECTROMAGNETIC IMPULSE DEVICE (Controller and
Device) read its own Instructions Manual.
Necessary displacement for heavy specimens
using Ø1,20 mm SUPPORT-CABLES.
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9. Equipment operation
After following the steps in 8 – Equipment Installation, your SA-BC Support will ready for use.
9.1 Positioning the sample
To be able to carry out a fast and precise characterization of samples using SA-BC Support,
read carefully the following steps:
Step 01: Install the equipment according to the characterization and size of the sample
(see 8 – Equipment Installation);
Step 02: Using a ruler or a caliper ruler and a pencil, trace nodal lines on the supported
face and on the sides of the sample. These lines should be 0.224 L distant from
the ends being L the length of the sample (see 7.2 - Placing the sample);
Step 03: Shift the sliding support tube until the opening distance between this and the
fixed supporting tube is greater than or equal to the width of the sample. The
positioning adjustment of this tube is not critical for the measurement result
and may also be used to adjust the tension on the SUPPORT-CABLES;
Step 04: Dislocate the tighteners, terminals and sliding support sleeves together with
their respective SUPPORT-CABLES until the distance between them allows to
support the samples exactly by their nodal lines (0.224 L);
Step 05: Place the sample over the SUPPORT-CABLES ensuring that the nodal lines
traces are precisely aligned with the cables under it.
After completing these steps, the sample should be correctly supported and positioned for the
characterization.
Note: To measure the torsional mode in rectangular bars, it is necessary to trace nodal
lines that are at a distance of 0.32 L for acquisition and excitation. For more details, check
10 - Acquisition and Excitation Modes.
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9.2 Positioning the MICROPHONE for acoustic signal acquisition
Step 01: Mount the MICROPHONE in the STURDY TRIPOD microphone clip or in the
VERTICAL MOUNTING BASE, as described in 8.3 –Mounting the MICROPHONE
in the Vertical Base and on the STURDY TRIPOD;
Step 02: Adjust the height or distance of the MICROPHONE, so its acquisition sensor is
at a distance of approximately 1 cm away from the face of the sample, as
illustrated below. Note: The distance is not critical for the results;
Step 03: Position the MICROPHONE as desired. It may be in line with the center of the
inferior face of the sample, when focusing on the flexural mode; in line with
and above the sample, when focusing on the longitudinal mode; or to the side
of the inferior face (near the SUPPORT-CABLES at the 0.32 L position), when
aiming to obtain both flexural and torsional modes.
Note: For more details on the correct positioning of the MICROPHONE, check 10 – Acquisition
and Excitation Modes.
9.3 Positioning the IED AUTOMATIC ELECTROMAGNETIC IMPULSE DEVICE
Step 01: Check if the Impulse Device is directly below the center of the inferior face of
the sample if the focus is on the flexural mode; or to the side of the inferior
face (0.32 L) to measure flexural and torsional modes.
Note: For more details on how to correctly position the Impulse Device, see 10 – Acquisition
and Excitation Modes.
Step 01: Turn the adjusting nut of the Impulse Device clockwise and anticlockwise to
allow the vertical movement of its tip. Adjust the position so it remains
approximately 3 mm away from the sample, as pictured next:
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Step 03: Configure the intensity of the shock from the Impulse Device against the
sample (see more information in the Instructions Manual that comes together
with IED Sonelastic).
Note: All information regarding the IED AUTOMATIC ELECTROMAGNETIC IMPULSE DEVICE
has been described in detail in its Installation and Operation Manual.
Attention! When dealing with heavy samples, ensure safety cables are
always positioned close by the SUPPORT-CABLES to avoid chances of
samples falling over the hands of the user in the case of a SUPPORT-
CABLE rupturing.
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10. Acquisition and excitation modes
The table below describes the most practical positions of the MICROPHONE and Impulse
Device for characterizing rectangular samples, using flexural, torsional and longitudinal
vibration modes.
Flexural Mode – I
Excitation from above and
signal acquisition from below,
both aligned with the center
of the sample.
Cables positioned at 0.224L.
Flexural Mode - II
Excitation from below and
signal acquisition from
above, both aligned with the
center of the sample.
Cables positioned at 0.224L.
Longitudinal Mode
Top-centered excitation and
signal acquisition from
opposite sides of the sample.
Cables positioned at 0.224L.
Flexural + Torsional
Modes - I
Excitation from above and
signal acquisition from below,
positioned at 0.32L from
opposed edges.
Cables positioned at 0.224L.
Flexural and Torsional
Modes - II
Excitation from below and
signal acquisition from
above, positioned at 0.32L
from opposed edges.
Cables positioned at 0.224L.
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The next table provides more information to the previous one, but focusing on cylindrical
samples.
Flexural Mode - I
Excitation from above and
signal acquisition from below,
both aligned with the center
of the sample.
Cables positioned at 0.224 L.
Flexural Mode - II
Excitation from below and
signal acquisition from above
both aligned with the center
of the sample.
Cables positioned at 0.224 L.
Longitudinal Mode
Top-centered excitation and
signal acquisition from
opposite sides of the sample.
Cables positioned at 0.224 L.
Flexural + Torsional
Modes - I
Excitation from above and
signal acquisition from below
from opposite sides and
ends.
Cables positioned at 0.224 L.
Flexural + Torsional
Modes - II
Excitation from below and
acquisition from above from
opposite sides and ends.
Cables positioned at 0.224 L.
Considering the arrangements presented to the signal acquisition of torsional and longitudinal
modes, positioning the SUPPORT-CABLES at a distance of 0.224 L is not ideal and it may
compromise the Damping measurements, however it has minimum influence (< 0.5%) when
determining Young’s Modulus.
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11. Warnings and equipment transportation
Reading all the information contained in this Installation and Operation Manual is
compulsory for the correct use of the equipment;
The electricity network where the optional items and accessories will be connected for use
must have a functional ground system;
Do not use this equipment for other purposes apart from the ones specified by this Manual;
The non-compliance with the instructions provided by this manual in what regards the use
of the equipment may reduce or invalidate warranty time.
Equipment Transportation:
- Transport the equipment with care;
- Avoid impacts and falls when transporting the equipment;
- Do not transport the equipment under the rain, even when wrapped in its original
packaging.
12. Maintenance and troubleshooting
- Depending on the material of the sample, there may be a detachment of residues during
handling. To avoid hazards and possible damages to the equipment, clean frequently using a
slightly dumped cloth.
- To maintain the equipment in a good working order and extend its life, keep all accessories,
optional items and chutes clean.
Troubleshooting:
Problem Possible Cause Solution
Locked (unable to move) tightener and ̸ or sliding terminal.
The terminals sliding chutes may be dirty or blocked.
Clean the chutes and remove any object or residue that may be obstructing it.
The support wobbles
when placed over a bench.
The bench surface may not be completely flat or may present some irregularities.
Adjust the rubber feet until they are all well placed and flat on the surface.
The sample touches the
safety cables and disturbs the measurements.
Sample weight is above
the limit or the SUPPORT-CABLE is not under enough
tension.
Check the weight limits in 6 – Specifications. Check the correct way to
apply tension to the SUPPORT-CABLES in 8.4 –Replacing the SUPPORT-CABLE set.
The specimen does not fit between the cables supporting tubes.
Sample dimensions are
above the limit.
Check dimensions limits in 6 –
Specifications.
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13. Symbology
Attention! Risk of Danger.
14. Technical support and warranty
If the equipment presents any abnormality, check first if the problem is listed in 12 –
Maintenance and Troubleshooting. If the problem still cannot be fixed, contact ATCP.
ATCP Physical Engineering offers a 12-month warranty with this equipment, starting from the
date of purchase. It covers manufacturing defects or materials defects, but some factors may
cause the invalidation of warranty:
1 – The non-compliance with the recommended care regarding the installation and
operation of this equipment, as describe herein;
2 - Accidents, falls, inadequate installation or any other damage cause by incorrect use or
action of natural agents;
3 - Violation, repair or any other modification or alteration done in the equipment or parts of
the equipment carried out by non-authorized agents (non-authorized by ATCP Physical
Engineering).
After the 12 months of warranty, parts, expenses and services shall be charged.
15. Statement of Responsibility
ATCP Physical Engineering takes total technical and legal responsibility over the SA-BC
Adjustable Support for Bars and Cylinders and guarantees that all information here provided
are true.
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NOTES:
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