Instruments compling to: ASTM D4575 - Standard Test Methods for Rubber Deterioration—Reference and Alternative Method(s) for Determining Ozone Level in Laboratory Test Chambers Info about this Standard
Instruments compling to: ASTM D5048 - Standard Test Method for Measuring the Comparative Burning Characteristics and Resistance to Burn-Through of Solid Plastics Using a 125-mm Flame Info about this Standard
Instruments compling to: AS_NZS 1660_2_1 - Test methods for electric cables, cords and conductors Insulation, extruded semi-conductive screens and non-metallic sheaths - Methods for general application Info about this Standard
Instruments compling to: DIN 53_509-1 - Prüfung von Kautschuk und Elastomeren — Bestimmung der Beständigkeit gegen
Rissbildung unter Ozoneinwirkung — Teil 1: Statische Beanspruchung Info about this Standard
Instruments compling to: EN 60811-1-1 - Insulating and sheathing materials of electric and optical cables — Common test methods — Part 1-1: General application — Measurement of thickness and overall dimensions — Tests for determining the mechanical properties Info about this Standard
Instruments compling to: FIAT 50417 - PRESCRIZIONI PER MATERIALI NON METALLICI - Controllo della resistenza all'invecchiamento in atmosfera arricchita di ozono della gomma sotto allungamento imposto Info about this Standard
Instruments compling to: IEC 60811_1_1 - Insulating and sheathing materials of electric and optical cables — Common test methods — Part 1-1: General application — Measurement of thickness and overall dimensions — Tests for determining the mechanical properties Info about this Standard
Instruments compling to: ISO 1183-1 - Plastics -- Methods for determining the density of non-cellular plastics -- Part 1: Immersion method, liquid pyknometer method and titration method Info about this Standard
Instruments compling to: ISO 1431-3 - Rubber, vulcanized or thermoplastic -- Resistance to ozone cracking -- Part 3: Reference and alternative methods for determining the ozone concentration in laboratory test chambers Info about this Standard
Instruments compling to: ISO 527-4 - Plastics -- Determination of tensile properties -- Part 4: Test conditions for isotropic and orthotropic fibre-reinforced plastic composites Info about this Standard
Instruments compling to: JIS K_6300-1 - Rubber, unvulcanized - Physical property - Part 1: Determination of Mooney viscosity and pre-vulcanization characteristics with Mooney viscometer Info about this Standard
Instruments compling to: VDA 675-205 - Tensile properties - Elastomer components in automotive - Test methods for determination of characteristics - Tensile stress-strain properties - Tensile test Info about this Standard
Overview Thermal regulated Block for the performance of aging tests in air and in liquids of elastomeric materials at temperatures up to 250°C conforming to ISO 188, 1817 ASTM D 471 and 865 Standards.
Aging tests are typically carried out to measure the variation of characteristics of an article before and after the aging process. The characteristics that are most frequently measured before and after aging are:
• Variation of mechanical characteristics (loading, lengthening, tearing)
• Variation of hardness
• Percentage variation of mass and volume.
Gibitre, in addition to providing this tool to perform accelerated aging in air or in liquid, also provides the tools to measure changes in the properties of the article and to produce the related reports.
Instruments Characteristics The instrument is fitted with:
• Aluminium block contained in a stainless steel housing with thermal insulation with 4 calibrated holes designed for the insertion of 4 glass test tubes
• Heating resistance
• PT 100 thermal probe for temperature measurement
• PID thermoregulator
• Timer for the set of the heating time with automatic switch off of the heater at the end of the set time
Timer The instrument is equipped with a timer that can be set between 0 and 99 hours and 59 minutes. The instrument automatically stops at the end of the set test time.
The Timer allows you to activate aging cycles by ending the test automatically in the absence of the operator.
Glass Tubes for samples. 4 glass tubes with a diameter of 38 mm and a length of 300 mm can be inserted into the instrument.
The specimens can be inserted into the glass tubes and locked using the fasteners provided.
Fixing devices allow the specimens to be placed in order to avoid contact with the glass tube walls.
Glass Tubes for test according to ASTM D865 The glass tubes are closed in the upper part with PTFE plugs provided with holes for the insertion of the glass pipes requested for the aging test in hot air according to ASTM D865
Water-cooled reflux condenser For aging tests in volatile liquids it is necessary to use condensation columns connected to a water supply. The condensation columns allow to condense the volatile part of the test liquid and make it fall back into the tube. In this way, the amount and formulation of the liquid in the glasses will remain unchanged.
A condensation column can be applied to each test tube.
Removable Side Supports Together with the instrument are supplied two side supports for housing the glass tubes not in use. The supports can be removed to reduce the overall dimensions of the instrument.
Safety Devices • Safety switch to prevent overheating
• Safety Push-button
• CE Labelling
Standard Calibration service for a Block Oven The calibration is performed with reference to the requirements of ISO 1817 standard.
The service includes:
• Ordinary maintenance of the instrument
• Calibration of the temperature inside the testing tubes (at 70°C, 150°C, 200°C, 250°C).
• Issue and e-mail shipment of the Calibration Certificate with traceability to primary standards.
Development and production The instrument is totally developed and produced in the plant of Gibitre Instruments in Italy.
All the mechanical parts are produced in the company workshop using modern CNC machines.
Components and sensors from well-known brands are selected in order to ensure the maximum reliability in the measures
Internal trained personnel takes care of all the production stages: assembly, start-up, calibration, packing, shipment and installation.
Standards the instrument complies with: VDA 675-301; ASTM D1056; ISO 6916-1; ISO 6916-2; AS_NZS 4179; ISO 188; ISO 1817; ASTM D471; ASTM D865; EN 681-1;
N° 4 glass tubes with 38 mm diameter and 300 mm length The use of individual test stations eliminate cross-contamination among different products under test
The thermal resistance surrounding the round-shaped aluminium block ensures uniform heating of the system
Temperature control range
From room temperature to 250°C (Resolution 1 °C)
Vapour phase recovery
By condensation with water-cooled reflux condenser
Timer for set of test time
Timer with set of hours and minutes with automatic swiching off of the heating system at the end of the time
safety thermostat for over-heating
Calibration Report conforming to ISO 1817 with traceability to primary standards
220 VAC ±10%, 50 Hz ±3, 10A, single phase - 110 VAC ±10%, 60 Hz ±3 on request.
Instrument only: 400 x 420 x 360 mm
With test tubes holders: 490 x 420 x 360 mm
And with reflux condenser mounted: 490 x 420 x 860 mm
? Does the volume of the glass tube of the instrument comply with International standards? The ratio between the volume of the samples and the volume of the liquid in the glass has an important impact on the effect of the aging on the samples.
ISO 1817 requires the volume of the liquid to be at least 15 times the volume of the samples.
The volume of the glass used for Gibitre Block Oven is 317.000 mm3.
Some examples of use:
- The volume of 1 ISO 37 type 2 Sample is about 920 mm3. Using 3 samples in the glass: Liquid_Volume/Sample_Volume>117
- The volume of 1 ISO 37 type 1 Sample is about 4040 mm3. Using 3 samples in the glass: Liquid_Volume/Sample_Volume>78.
Conclusion: the volume of the glass is fully conforming to ISO 1817 requirements