Laboratory instruments for rubber and plastic testing

EN002.003.0 29

Gibitre Ozone check is a complete ozone cabinet, produced in confor-mity with international standards, which permits to estimate the resistance to cracking under static or dynamic tensile strain of standard samples or technical articles made of vulcanized or thermoplastic rubbers. The instrument permits the regu-lation of ozone concentration, air flow speed, temperature and relative humidity (optional) to comply with international standard methods.The generation and shooting down of ozonized airflow is carried out in clo-sed circuit through self-regenerating active carbon filter in order to meet safety requirements and to make an aspiration system unnecessary.The instrument enables Ozone deterioration tests of rubber samples and rubber parts to be carried out in conformity with ISO 1431, 3011, 7326, ASTM D 1149, 4575, 3395, 518, DIN 53 509 International standards.

Technical features

REGULATION OF THE INSTRUMENTThe Ozone tester permits the regu-lation of: - Ozone Concentration, between

0 and 500 pphm (UV absorption detector);

- Test temperature, between am-bient +5°C and +70°C;

- Air Flow in the Test Chamber, between 1 and 3 air changes/mi-nute;

- Relative Humidity, between 40 and 90% (optional).

SAFETY DEVICESThe instrument automatically locks the opening of the instrument when the ozone concentration exceeds 10 pphm to prevent undesired contact with ozonized air.The generation and shooting down of the Ozonized airflow is made in closed circuit in order to meet safety requirements and to render an aspi-ration system unnecessary.Safety sensors protect the instru-ment from excessive temperature and humidity due to incorrect set.

THE TEST CHAMBERGibitre Ozone Tester is the only instrument to have a cylindrical test chamber with symmetrical air extrac-tion by means of a double-chamber. This unique feature ensures a homo-geneous distribution of ozonized air inside the chamber that could not be obtained with a cubic chamber.The chamber is made of stainless steel. The instrument has an inspec-tion windows in the front with two

OzoneCheck-UVElectronic Ozone Tester for the evaluation of ozone resistance of rubber samples

3030 EN002.003.0

lights on the sides which permit to inspect the samples during the test without need of stopping the test and removing the samples from the chamber. The planetary effect device has a special feature that allows the sample holders to be moved inside the chamber to inspect each sample AUTO RE-START AFTER POWER FAILUREThe instrument permits to restart and continue the test after an electrical black out. SoftwareThe program permits the preparation of customer-defined test procedu-

res defining test parameters: ozone concentration, temperature, relative humidity (optional), number of air changes and test time.After the test has started, the pro-gram automatically regulates the instrument to meet the requirements for the selected test procedure.The Ozone Concentration, the relati-ve humidity and the test temperature during test time are automatically displayed in the graph. Different groups of sample with independent test identification and test time can be tested at the same time. The instrument automatically pauses when one of the groups of samples has come to the end of test

time. After sample inspection the instrument is restarted to proceed with following tests.At the end of the test, a Test Report can be printed and stored. The report includes: test identification data, test parameters, sample characteristics, curves of test parameters and notes regarding test results.The program automatically activates the instrument shutdown cycle at the end of the defined test time.The program permits the electronic calibration of Ozone Concentration, relative humidity and temperature.

31 EN002.003.0 31

Standards the instrument complies with

ISO 1431, 3011, 7326; ASTM D 1149, D 4575, D 3395, D 518; DIN 53 509, SAE J1401

Test Data produced Ozone concentration, temperature and humidity level during test time

Data Printout General test identification data Automatic or manual printout of ozone concentration and temperature during test time

Temperature control (standard version)

From room temperature +15 °C to 70 °C by means of microprocessor PID thermoregulators with 0.1 °C accuracy. The instrument is equipped with a heat interchanger that can be connected to a water supply to reduce the temperature

Temperature control (with humidity option)

From 15 °C to 70 °C by mean of microprocessor PID thermoregulators with 0.1 °C accuracy. The instrument is provided with a refrigeration unit that permits the regulation of the temperature

Airflow Air change rate adjustable from 0.5 to 3 changes/min (effective air change velocity between 7 and 39 mm/sec)Internal circulating fan according to ISO 1431

Ozone concentration control

Automatic or manual between 10 and 500 PPHM by means of UV-absorbtion detection with ± 3% accuracy

Ozone circuit type Closed circuit with continuous ozone production and shooting down through self-regenerating active carbon filter.

Static Sample Holders (optional)

Sample holder for the static strain of 2 samples with adjustable distance of the grips. Static test piece holder with planetary effect, which moves the test pieces over the whole volume of the chamber for a more homogeneous ozone atmosphere exposition In compliance with ASTM D 3395-A standard.Sample holders for tests on rubber hoses according to ISO 7326-method 1 and 2.

Dynamic Sample Holders (optional)

In compliance with ISO 1431 and SAE J1401 To be inserted into test chamber for the study of ozone resistance of cured rubber under dynamic conditions (from 3 to 30 cycles/min - 0.05 to 0.5 Hz). Up to 10 samples can be tested at the same time.

Test chamber Cylindrical Stainless Steel test chamber with 155 litres capacity provided with adjustable internal illumination and large inspection window Dimensions: diameter:550 mm; height: 550 mm

Humidity generation and control device (with humidity option)

Humidity control system to generate from 40 to 90% Relative Humidity in test chamber to test ozone resistance in presence of humidity. The device includes suitable refrigerating unit and a special cold steam generator.

Sample holder elevator Lifting gear for up and down movement to help in inspection of the different sample holders

Power supply 220 VAC ±10%,50 Hz ±3, 10 A, single phase, 1.6 kW - 110 VAC ±10%, 60 Hz ±3 on request

Power supply (refrigerator for humidity control)

380 VAC ±10%,50 Hz ±3, three phase, 1.5 kW - Other on request

Dimensions (W x D x H) 1080 x 1100 x 1200 (2400 with lifting system) mm

Dimensions (refrigerator) (W x D x H) 685 x 1200 x 820 mm

Weight 370 Kg (instrument) 150 Kg (refrigerator)

Personal computer Minimum Configuration: Intel Core I3 2 GB RAM; Compatible operating Systems: 7 and 8 (64 bits); Connection to the instrument via USB cable (included)

Software usage Languages Italian, English, French, Spanish, German,Portuguese, Russian, Chinese, Japanese,Turkish, Polish.

The main page of OzoneCheck software: the activity state is displayed for all sensors installed in the machine. The curves of Ozone concentration, temperature and humidity are displayed.

The page for the selection of the test procedure to be used. The instrument automatically regulates according to the test parameters defined in the test procedure.

Above: sample holders for static tests in traction.

Left: the cylindrical test chamber with symmetrical air extraction ensures homogeneus air distribution

www.gibitre.it

GibitreInstrumentss.r.l.Viadell’Industria,7324126Bergamo-ItalyTel.:+39.035.460146Fax:+39.035.460687E-mail:customer.service@gibitre.it

Wereservetherighttomakechangesindesignandspecificationswithoutfurthernotice

ForthelatestnewsaboutGibitreInstruments:newproducts;softwareupdates;fairsandexhibitionsetc.pleasevisitwww.gibitre.it

ww

w.o

ptim

ist.

it