METRASTAT 905 Testing oven

A high performance, fully automatic testing oven, the Metrastat 905 makes it possible, like its predecessors, to expose polymer samples to heat, at constant temperature and for different lengths of time.
But with a difference!
The name of the new feature is Heat Loss Compensation (HLC), a radio driven temperature control system, the three main advantages of which are the following:

 

• it shortens considerably the preheating time necessary for the samples to reach the test temperature before emerging progressively from the oven
• it starts automatically each test after the shortest possible preheating time
• it ensures that, as the samples are gradually coming out of the oven, their temperature remains the same, as long as possible, and this regardless of the test duration.

 

Furthermore, a multi zone heating bloc ensures a straight heat distribution across the width of a carrying frame able to accommodate up to 9 samples, each half an inch wide. All nine samples are baked simultaneously on nine separate, extra light and corrosion resistant titanium carrying trays held on the frame. This system allows the accurate optical comparison of all nine samples after a test.

Each tray can hold powders and pellets or be fitted with clamps to hold flat samples.

A range of test durations from one minute to up to three months enables the user to carry out either short stability tests on particularily heat sensitive polymers such as PVC, PVDF, etc., or long term ageing tests on a variety of other industrial polymers such as PE, PP, etc.

An exhaust system with built-in hydrogen chloride filter is fully integrated in the instrument and a portable HCl gas detector is a standard accessory.

Finally, the fact that the Metrastat 905 comes to a complete rest at the end of each test makes it essentially an energy saving apparatus.

Technical specifications of the Metrastat 905

• Dynamic oven for the gradual exposure of polymers to heat (DIN 5381F, AFNOR T51-224)
• Resistant to corrosion from hydrogen halides or tropical climate conditions (316L stainless steel)
• Traveling carrying frame with nine separate non corrodable and non adhesive sample holding trays
• Microprocessor driven temperature controlling unit with  0.1°C feedback temperature display
• Built-in safety temperature limit with automatic shut-off
• Automatic preheating time and unlimited choice of test durations
• Energy saving by automatic shut off at the end of a test
• Automatic switch-over from the static preheating process to the dynamic baking process
• Permanent display of the test temperature and of the samples’ travel progression in the oven
• Early manual start of the baking process possible
• Memory storage of the last used – Preheating Time/Test Duration – combination
• Automatic radio driven Heat Loss Compensation (HLC) throughout the oven
• Emergency button for immediate interruption of the test and quick release of the carrying frame
• Automatic quick release of the carrying frame when restarting the apparatus after a power failure
• Modular construction for easy maintenance of the apparatusOptional accessories:
  Special carrying frame for holding five one inch wide sample carrying trays
  Spare sample carrying trays, either for sheet and profile or for pastes, powders and pellets

Power supply	185-245VAC/48-62Hz
Maximum power uptake	2400W
Heating elements	3 x (4 x 200W)
Temperature range	50 – 300°C ± 1%
Average heat-up time	RT to 300°C in 10 min
Number and size of samples	9 x (260 x 13 x 6mm), or 5 x (260 x 25 x 6mm)
Preheating time	Automatic
Test duration	Unlimited choice from 1min to 90 days
Dimensions (WxHxD)	450x500x790mm
Weight	70Kg

The manufacturer retains the right to modify the technical specifications above, anytime and without prior notice.