APD Test Facility

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APD in-house test department is equipped with state-of-the-art ANSTI test systems - fully integrated laboratory systems designed specifically to test and measure the dynamic breathing performance of a wide range of life support equipment to European Standards: EN250:2000 and EN14143:2003.

Ansti Test Systems Ltd specializes in the design and manufacture of test facilities for performance measurement of underwater breathing apparatus. The facilities are turnkey packages, which utilize computerized data acquisition techniques to display in real-time the dynamic performance of the breathing apparatus under test.

In January 2005. the department was radically expanded and moved into a new section, custom-built to house both our existing R&D Demand Regulator Test Facility and our latest acquisition, the ANSTI 200m Breathing Simulator - Life Support Equipment Test Facility. which is the premier specialist system of its kind.


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                                      ANSTI 200m Breathing Simulator - Life Support Equipment Test Facility

 

APD was the first to acquire the ANSTI R&D Demand Valve Test System (see below) when it was originally developed, and similarly, the ANSTI 200m Breathing Simulator is the first such system on this scale manufactured by ANSTI specifically to meet Ambient Pressure Diving’s CCR research and development needs.
The test vessel is large enough to accommodate twin cylinder SCUBA diving equipment or more to the point, the INSPIRATION and EVOLUTION rebreathers in both swim and head upright positions, or in fact, in any attitude of pitch and roll.

APD Research & Testing Facility

The APD in-house test department is equipped with state-of-the-art ANSTI test systems - fully integrated laboratory systems designed specifically to test and measure the dynamic breathing performance of a wide range of life support equipment to European Standards: EN250:2000 and EN14143:2003.

Ansti Test Systems Ltd specializes in the design and manufacture of test facilities for performance measurement of underwater breathing apparatus. The facilities are turnkey packages, which utilize computerized data acquisition techniques to display in real time the dynamic performance of the breathing apparatus under test.

In January 2005 the department was radically expanded and moved into a new section, custom-built to house both our existing R&D Demand Regulator Test Facility and our latest acquisition, the ANSTI 200m Breathing Simulator - Life Support Equipment Test Facility which is the premier specialist system of its kind.

ansti8aANSTI 200m Breathing Simulator - Life Support Equipment Test Facility
Our company was the first to acquire the ANSTI R&D Demand Valve Test System (see below) when it was originally developed, and similarly, the ANSTI 200m Breathing Simulator is the first such system on this scale manufactured by ANSTI specifically to meet Ambient Pressure Diving’s CCR research and development needs.


The test vessel is large enough to accommodate twin cylinder SCUBA diving equipment or more to the point, the INSPIRATION and EVOLUTION rebreathers in both swim and head upright positions, or in fact, in any attitude of pitch and roll.

 

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Dive Simulation: 

This acquisition enables us to carry out unlimited and extensive testing, simulating dives in a range of conditions, breathing rates, water temperatures and depths down to 200 msw.


As an in-house facility we are able to repeat as many tests as we like uninhibited by the restrictions of time, logistics and cost that are usual when using external test houses. This means we now have the capability to continually refine and check our data on the many aspects of rebreather performance, such as:

Work of Breathing rates with different breathing mixtures at different depths

PO2 setpoint control accuracy

Endurance, reliability and accuracy trials

CO2 Scrubber endurance (across the range of depths and conditions)

Scrubber Temp-Stick trials

Various brand Scrubber material comparison tests

Hydrostatic imbalance trials to ensure that the Counter-lungs are located in the ideal position to achieve optimum breathing performance in all attitudes of pitch or roll

Cutting Edge Information

All of this collated data, in particular the CO2 Scrubber Endurance trials - conducted across the full spectrum of influence: CO 2 production rates, breathing rates, water temperatures and depths - and the ability to systematically comparative-test the various brands and types of scrubber material on the market for the first time , is information that can benefit both ourselves as manufacturers but also ultimately, the knowledge-base of the rebreather diving community as a whole.

Mouthpiece Testing

The system also features a specially designed Sheffield (anatomically correct) head with adapters to connect and test other life support elements such as the Full-face Masks and OC/CC switch mouthpieces currently under development. By measuring breath by breath the amount of CO 2 we are able to discover and accurately measure the effects of any ‘dead-space’ (i.e. areas where CO 2 may accumulate ) and thereby eliminate this, if necessary, by modifying the design of the unit. This test capability is absolutely crucial to this kind of development work.


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Hi-Tec Safety & Accuracy


The facility has a unique ability in that we can perform very fast descents and ascents under various conditions - a great advantage over manned test chambers where excessive temperature changes, decompression requirements and chamber volume preclude such tests.

This ability makes us unique among rebreather manufacturers. We can simulate the ultimate performance challenge for any closed circuit rebreather - a hard-breathing fast ascent - and thereby establish with accuracy the efficacy of our design.

ansti2aThe Stainless Steel Breathing Simulator is fitted with a pure sine wave drive linkage. It has variable tidal volume and push button control of breathing rate. The breathing system is fitted with a heating and humidification system which, together with a hyper-efficient temperature control system allows us to perform test dives from -4ºC to +40ºC - exceeding the test requirements of BS EN 250: 2000.

The scrubber test system uses a mass flow controller to inject, at all depths, a calibrated flow of carbon dioxide into the breathing circuit simulating the full range of diver work rates. The rebreather inhale gas is monitored using a high quality fast response carbon dioxide analyser. The analyser is calibrated against relevant calibration gases at all stages of the dive ensuring ultimate accuracy and confidence in the test results.

The operator can view equipment performance via a range of multiple real-time displays. The output is archived for general records and is then accessible for post test analysis, review, or printed in the form of Test Certificates.

The ANSTI R&D Demand Regulator Test Facility

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The first of its type ever built by ANSTI, the ANSTI R&D Demand Regulator Test Facility is used to test and measure the performance of smaller products such as the Auto Air octo-inflator, the rebreather First Stage and other products under development. It is also used to perform routine but essential Quality Control/QA procedures in the general production processes of our product range.

 

 

ansti9secondaryRated to a maximum working depth of 80 msw, the test vessel is fitted with a quick release lid system and a pre-set automatic depth controller which minimises the time taken for each test. The computer and instrumentation system measures and records the test depth and the real-time response of high pressure, inter-stage pressure, mouthpiece differential pressure and stroke. The results are printed in the form of test certificates showing the dynamic response of the equipment for the selected parameters

     

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