3 04 – Our savoir-faire
05 – Electromechanical sensors (HF05 and HF32) 06 – Control unit for electromechanical sensor (HF85) 06 – Alarm equipment (HF90/1 and HF90/2)
07 – Electronic sensors (HF10 and HF35) 08 – Electronic sensors (HF40, HF41 and HF50) 09 – Electronic sensors (HF52, HF53 and HF70)
10 – Interface, frequency converter (HF84/14 and HF84/4) 11 – Electronic control unit (HF80)
11 – Digital display (HF87) 12 – UHF Radio link (HF89)
12 – Computer assistance and management 13 – Dynamometric lifting shackle (HF55BT) 13 – Load controller for chain hoist (HF25) 13 – Dynamometers
15 – Instrumented sheave blocks 16 – Repair and calibration
17 – Configuration of rigging systems
18 – Dimensions for machining dynamometric pin 19 – Photographs of some installations
4 • Study and design of products • Design and development of our elec-tronic control systems • Machining of sensors on NC machines • Assembly, calibration and repair • Instrumentation of all types of sensors
Our
savoir-faire
MANUFACTURING SENSORS ON NC MACHINES
ASSEMBLY AND CALIBRATION OF PRODUCTS INSTRUMENTATION AND ELECTRONIC CONTROL OF SENSORS
5
Electromechanical
sensors
T
he electromechanical load limiter has been developed for installation on small and me-dium lifting equipment where the sole selection criterion is the “load limiter” function. This sensor provides the most economical solution that is also the easiest to install.Technical characteristics
For capacities from 250 to 12,000 daN Available with one or two set levels Contact rating: 5A / 250VAC Protection rating: IP 55
Exists in standard “A” version, or high-precision “B” version
Installation
Fits directly between the attachment point of the “dead end” and the wedge socket
Technical characteristics
For cables from 4 to 36 mm diameter For cable loads of 100 to 12,000 daN Available with one or two set levels Contact rating: 5A / 250VAC Protection rating: IP 55 Exists in standard “A” version, or high-precision “B” version
Installation
Fits directly to the “dead end” of the rigging
HF 32 SENSOR
HF 05 SENSOR
6
Control unit for sensors
Version “b”
C
ontrol unit designed for operation with all electromechanical sensors that use a mi-croswitch for level detection. Its function is to act as an interface between the micro-switch and the contactor coil on the lifting equipment.Electronic siren type HF90/1
110 dB
Flashing lamp
type HF90/2
Technical characteristics Two changeover contacts A dynamic effects corrector Output for audible and visual alarms Permanent self-checking of the sensor Overload simulation button
Installs on DIN rail
Power supply: 48/110 VAC or 230/400 VAC Installation
Designed to operate with all version “B” electrome-chanical sensors
CONTROL UNIT HF 85
7
Electronic sensors
O
ur family of electronic sensors provides a solution to practically 100% of your require-ments, whatever the loads or capacities of your lifting equipment. All the sensors are fitted with integrated electronics generating a digital signal from 0 to 10,000 Hz and allowing for distances of up to 100 metres between the sensor and the control unit.Technical characteristics
Sensor operation: self-aligning traction sensor Capacity: from 1,600 to 20,000 daN
Frequency converter: integrated in sensor Load management: using control unit type HF80 Operating temperature: -20°C to +60°C
Connection: via PG?? and integrated terminal block Sensor precision: 0.3% of nominal capacity Installation
Installed directly on the dead end of the rigging
SENSOR HF 10
Technical characteristics
Sensor operation: electronic sensor fitted to cable Measurement range: for cables from 4 to 46 mm diameter Capacity: from 200 to 20,000 daN
Frequency converter: integrated in sensor Load management: using control unit type HF80 Operating temperature: -20°C to +60°C
Connection: via PG?? and integrated terminal block Sensor precision: ± 1% of nominal capacity Protection rating: IP65
Installation
8
Electronic
sensors
Technical characteristics
Sensor operation: compression sensor Capacity: from 1,600 to 20,000 daN Frequency converter: integrated in sensor Load management: using control unit type HF80 Operating temperature: -20°C to +60°C
Connection: via PG?? and integrated terminal block Sensor precision: ± 1% of nominal capacity Installation
Installed directly on the traction pin at the dead end of
the rigging
SENSOR HF 40
Technical characteristics
Sensor operation: compression sensor Capacity: from 5,000 to 50,000 daN Frequency converter: remote type HF84 Weight indicator: type HF87
Operating temperature: -20°C to +60°C Sensor precision: 0.07% of nominal capacity
Installation
Ideally, sandwiched between two chassis mem-bers to provide high-precision weighing.
SENSOR HF 41
Technical characteristics
Sensor operation: load-cell pin manufactured to order
Capacity: from 500 kg to 1000 tonnes Frequency converter: integrated in sensor Load management: using control unit type HF80 Operating temperature: -20°C to +70°C
Connection: via PG?? and integrated terminal block Sensor precision: ±0.3% of nominal capacity Installation
May be fitted to all applications with a standard pin
9 Technical characteristics
Sensor operation: instrumented wedge socket Type of wedge socket: CROSBY
Dynamometric pin: POWER LIMIT in stainless steel Capacity: for cable diameters from 9 to 35 mm Frequency converter: integrated in sensor Load management: using control unit type HF80 Operating temperature: -20°C to +60°C
Connection: via PG?? and integrated terminal block Sensor precision: ±1% of nominal capacity Installation
Direct replacement for the original wedge socket without any height loss. For all lifting equipment with a dead end
SENSOR HF 53
Technical characteristics
Function: dynamometric swivel housing Capacity: from 1,600 to 100,000 daN Frequency converter: integrated in sensor Load management: using control unit type HF80 Operating temperature: -20°C to +60°C Connection: via PG?? and integrated terminal block
Sensor precision: ±0.3% of nominal capacity Installation
Designed to accept directly the traction pin at the dead end of the rigging
SENSOR HF 52
Technical characteristics
Sensor operation: traction or compression Capacity: from 500 to 10,000 daN Frequency converter: remote type HF84 Load management: using control unit type HF80 Operating temperature: -20°C to +60°C Sensor precision: 0.1% of nominal capacity Installation
Many applications are available to answer specific requirements
Electronic
sensors
10
Interface
Frequency converter
Frequency converter
This frequency converter is supplied in an IP67, aluminium housing and converts the mV signal from the sensors into a frequency signal that varies from 0 to 10,000 Hz, and is compatible with all our control equipment.
This frequency converter is already incorporated into most of the Power Limit sensors. This frequency converter also ensures that all strain gauge sensors are compatible with the Power Limit control equipment.
Converter addition unit
This frequency converter addition unit, in an aluminium housing, can sum 4 mV sensors and output a proportional frequency signal ranging from 0 to 10,000 Hz.
HF 84/1
11
Control
of electronic sensors
Technical characteristics Function: digital control unit
Management: overload and cable slack Power supply: 48/110 or 230/400 VAC Protection of settings: 4-digit code Dynamic effects management: integrated Contacts: 2 changeover contacts Alarm: audible and visual
Operating temperature: -20°C to +60°C
MONITOR HF 80
C
ontrolled entirely by a microprocessor, this control unit is able to program setpoints automatically. It calculates and stores loads on travelling cranes according to the FEM (European Federation of Materials Handling) standardDigitales Display
HF 87
Screen: red display + bar graph Programming: 4 push buttons Dimension of digits: from 16 to 125 mm Power supply: 230/400 VAC Tare function: integrated PC connection: included via RS 232 Load limiter function: integrated Protection rating: IP65
12
UHF Transmitter/receiver
All the Power Limit sensors can be connected to a telemetry box that allows communica-tion over long distances between the sensor and the display. This unit is very useful in providing a link between an instrumented sheave block and a display installed on a travel-ling crane
HF 89
Wireless link
Assistance on ultra-portable
computer
P
ower Limit can supply an ultra-port-able computer (format A5) equipped with specific software that can act as an interface between the control units and the displays.It provides very rapid access to all the set-ting parameters, or after a certain period of utilisation it can provide the whole spectrum of loads according to the requirements of the FEM (European Federation of Materials Handling) standard.
13
Load controller for chain hoist
Lifting shackle
Instrumented and stand-alone lifting shackle with a “Bluetooth” communication link.
Reads and stores loads directly on a PDA or an ultra-portable PC.
Three operating modes to answer all your needs. The PDA can store and handle all measurements taken.
Field of application Weighing suspended loads or evaluation of tensile loads Technical characteristics Capacity: from 6.5T to 100 Tonnes Data interrogation range: 25 metres Operating autonomy: 15 hours
HF 55 BT
Instrumented lifting
shackles
Supplied with PDA manufactured by HP or with an ASUS ultra-portable
Description
This HF 25 kit and its accessories are supplied in a robust box, and can determine the load on chain hoists very rapidly and efficiently.
It is thus very easy to check if the torque limiter fit-ted to a chain hoist is correctly adjusfit-ted according to current regulations. The need for calibrated loads is completely eliminated.
14
HF 55 BT
Dynamometers
Equipment manufactured by our partner TRACTEL Dynamometer Type: LLZ Capacity: from 0.25T to 20T Precision: ± 0.8% TRACTEL Dynamometer Type: LLX Capacity: from 0.25T to 250T Precision: ± 0.2% TRACTEL Dynamometer Type: MWX Capacity: 0,5 bis 25 t Precision: +/- 0,1 % Mini-Dynamometer Type: HCB Capacity: 20 bis 200 kg TRACTEL Dynamometerwith remote interrogation Type: LLX-2
Capacity: from 0.5T to 10T Data interrogation range: 80 metres Precision: ± 0.2%
15
Instrumented
sheave blocks
D
epending upon the configuration and capacity of your lifting block, POWER LIMIT is able to provide full instrumentation according to your requirements. We can also ensure data transmission of weight measurements directly to a computer using a radio link.3,2 T 16 T
16
Repair
and testing
Repair and testing
I
n addition to our own manufacturing workshop, we have the capacity to carry out repair and calibration of all types of dynamometers. In most cases, we can also calibrate sen-sors acting as load limiters, prior to delivery.Calibration
We have three certified machines:
• A tensile tester with capacity 2 – 5 and 10 Tonnes • A tensile tester with capacity 10 and 60 Tonnes • A tensile or compression tester with capacity 32 Tonnes
17
Configuration
of main rigging systems
Figure 01 Figure 02 Figure 04 Figure 06 Figure 08 Figure 03 Figure 05 Figure 07
18 Bottom Top G ø 68.00 50.00 C D F E B A
Dimensions
for manufacturing Dynamometric pin
Required dimensions
Load-bearing are « A » = ... mm
« B » = ... mm
Width of active part « C » = ... mm
Effective length of pin « D » = ... mm
Dimensions of retaining key « E » = ... mm
« F » = ... mm
Diameter and tolerance « G » = ... mm
Tolerance = ... mm.
Capacity on load pin = ... daN
Direction of load (see arrows) Direction = ...
19
Some
3 04 – Operating principle of Power Limit tensiometers
05 – Standard tensiometer (HF37/1/A)
06 – Tensiometer with Bluetooth communication
07 – Tensiometers for heavy loads (HF36/1, HF36/2 and HF36/3) 08 – New Bluetooth version of tensiometer (HF36/2)
09 – Tensiometer (HF36/4) with hydraulic assistance 10 – Specific tensiometer for lifts (HF39/1/A) 11 – Specific tensiometer for lifelines
12 – Tensiometer for measuring tension in tie-down straps
13 – POWERPLUG HF 44/1/A intended for testing strength of threaded concrete anchor plugs?,
14 – Compact extractometer (HF 44/2/A)
– and extractometer (HF/44/3/A) with hydraulic assistance 15 – Weighing platform and pallet weighing
16 – Photographs and some applications of tensiometers
4
Description
T
he tensiometer is a precision item of equipment that allows loads in stretched flexible structures to be measured, without installing a dynamometer in line.Operating principle
W
hen the tensiometer is placed on a stretched cable, it generates a signal that is approximately proportional to the load (raw, untreated signal). Nevertheless, there are a very great variety of cables on the market and each cable has its own char-acteristics of composition, diameter, rigidity, specific weight, etc.Unfortunately, all these parameters have an incidence on the measurement results. In order to allow for all these specificities, Power Limit has designed and created its own database. In fact, for each cable stored in memory, 2 or 3 similar cables but of differing origins have been selected from amongst those most widely found in the market.
Each stored reading is compared on our tensile test benches, and the result is the average of the three readings carried out by rotating the sensor through 120° around the cable each time. To qualify a cable, 10 sets of readings are made in steps of 10% of the nominal load a total of 30 readings for each cable. These 30 readings are treated by the microprocessor that then calculates the correction polynomial that is applicable to the cable in question, and which is then stored in the database.
Using this method, Power Limit is the only manufacturer to guarantee you excellent precision across the whole measurement range.
5
HF 84/1
Tensiometers
Specific tensiometer for different applications - Guy-wires for aerials
- Guy-wires for wind turbines - Rigging of sailing vessels
- Capable of measuring 7 cables of differing diameters - For cables of 5 to 13 mm
- Three different databases are available
200 hours autonomy
TYPE
HF37/1/A
6
Tensiometers
Tensiometer with “BLUETOOTH”
communication system
Technical characteristics
Intended for the same applications as the HF37/1/A model, but with:
- Reading load values on a PDA at a distance of approxi-mately 25 meters;
- It is capable of measuring cables of 7 different diam-eters in three different types of structure (normal, rigid, and rope);
- It is fitted with a temperature sensor;
- The PDA is supplied with a management program de-veloped by Power Limit, which makes it a remarkable tool in ensuring the traceability of readings carried out.
TYPE
HF37/1/BT
Supplied in made-to-measure case, suitable for use on-site
Supplied with PDA manufactured by HP or with an ASUS ultra-portable
7
HF36/HZ
Version 1 - 2 - 3
Technical characteristics - Digital display compatible with
all three tensiometers
- Stored spectra for approximately 100 different cable types
- Very easy to use and excellent measurement precision - Equipment suitable for on-site use
For cables from 5 to 44 mm in diameter and for measuring loads of 100 kg to 40 tonnes
8
Tensiometers
HF36/2/BT
Interrogation range ± 25 metersNEW!!!
Tensiometer with BLUETOOTH
communication system
Technical characteristics
- Wireless tensiometer, completely self-contained; - For cables or ropes from 8 to 28 mm diameter;
- For measuring loads from 150 to 20,000 daN;
- It has three different databases, standard cables, rigid cables and ropes.
- The PDA is supplied with a manage-ment program developed by Power Limit, which makes it a remarkable tool in ensuring the traceability of readings carried out.
Supplied with PDA manufactured by HP or with an ASUS ultra-portable
9
Large tensiometers
Technical characteristics
Tensiometer HF36/4 and HF 36/5 for cables with diameters from 40 to 90 mm and loads up to 200 Tonnes.
Tensiometer with hydraulic assistance
10
POWERLIFT
TYPE HF39/1/A
Specific tensiometer for measuring the load distribution in lift cables.
It is supplied with a database that is specific to lifts and for diameters from 8 to 13 mm.
TYPE HF39/1/B
Also available in a BLUETOOTH Version, this model also allows loads to be measured in dynamic mode at a rate of 50 readings a second.
It also ensures complete traceability of all measurements and tests carried out.
The interrogation range is ± 25 meters.
POWERLIFT
POWERDOOR
Description
The POWERDOOR is a measuring unit intended for measuring the impact force for doors with motorized closure.
TYPE HF42/1/A
New !!!
11
POWERLINE
T
ensiometer specially designed for measuring loads in lifelines. Its database contains data for seven different lifelines, which thus allows almost all lifelines available on the market to be checked.12
POWERSANgLE
Application
This tensiometer is an autonomous measuring unit intended to measure tie-down tensions in synthetic fibre straps.
It is designed to measure loads in straps from 35 to 50 mm in width. It complies fully with the requirements of the EN 12195-2 standard.
Technical characteristics Material: aircraft-quality aluminium
Measurement capacity: from 10 to 1500 daN Measurement precision: ± 2%
Measurement units: kg, daN, IBS
Operating temperature range: -5°C to +50°C Protection rating: IP 62
Operating autonomy: 200 hours
13
TYP HF44/1/A
Technical characteristics
The POWERPLUG HF 44/1/A is an autono-mous, traction testing unit intended to test the resistance of threaded anchor plugs in concrete.
- Control of sliding is either automatic or manual;
- It can measure loads from 20 to 1500 daN; - It contains two test programs which
com-ply with the EN 795 standard; - It can store up to 50 test results; - It is supplied with four threaded studs
(M10 – M12 – M14 – M16) and a traction hook for rings.
POWERPLUg
ExTRACTOMETER
14
HF 55 BT
Special features
This unit has been specially developed to test anchor fittings that are set in confined positions.
The design of this unit allows it to be used in any posi-tion since the measuring sensor can be both rotated and reversed.
It is supplied with a test program that complies with the EN 795 standard.
Technical characteristics
Traction capacity: from 0 to 1600 daN Precision of applied load: ± 0.5% Diameter of load bell-housing: 80 mm Load application: using spanner supplied with unit
Protection rating: IP65
Autonomy: 200 hours (3 AA batteries)
Compact
Extractometer
HF 44/2/A
Extractometer with hydraulic assistance
Technical characteristics
Traction capacity: from 0 to 3600 daN Diameter of load bell-housing: 120 mm
15 Application
Weighing and checking vehicles for accept-ance or dispatch of raw materials. Weight measurements may be printed out simply by connecting a printer to the display unit..
HF 145
Weighing platform
Technical characteristics
Capacity: 1.25 – 2.5 – 5 and 10 T Display: 6 red digits Material: aircraft-grade aluminium Height of digits: 20 mm Protection: anodising Printer or computer connection: 2 serial ports Sensor precision: class C3 Approval: OIML – 10,000 points
Pallet weigher
Technical characteristics
Very strong, metallic chassis in a “U”-shape, designed to accept a pallet mover. Weighing is by means of 4 precision sensors.
Capacity: 1,250 and 2,500 kg Height of digits: 20 mm
Feet: pivoting on rubber base Printer or computer connection: 2 serial ports Sensor precision: class C3 Approval: OIML – 10,000 points
Protection rating: IP 67 Power supply: via power adaptor 230/12 DC Display: 6 red digits
16
Applications
of tensiometers
