ISO 80601-2-69 figure 21.101 standard resistance

201.9.6.2.1.101 Additional requirements for audible acoustic energy
a) The A-weighted sound pressure level emitted by the oxygen concentrator, when tested in accordance with the method in this subclause, shall be disclosed in the instructions for use:
1) for an oxygen concentrator with a continuous flow mode,
i) at a flowrate setting of 3 l/min, or
ii) the maximum flowrate setting if this is less than 3 l/min,
iii) as well as for the maximum flowrate setting if this setting is greater than or equal to 4 l/min;
and
2) for an oxygen concentrator with integrated oxygen conserving equipment function, at the maximum demand flow rate setting of normal use.
b) The instructions for use shall disclose:
1) the sound power level; and
2) the tested flowrates.

Check conformance with the following test:
c) For an oxygen concentrator with a continuous flow mode, place the oxygen concentrator on a sound-reflecting plane and attach 10 m ± 1 m of oxygen tubing.
d) Attach the standard resistance (as indicated in Figure 201.101) to the patient end of the oxygen tubing.
Set the oxygen concentrator to a flowrate of approximately 3 l/min or the maximum flowrate setting if this is less than 3 l/min.

Key
D is the internal diameter: (4 ± 0,1) mm
L is the length: (40 ± 1) mm
A is the angle (45 ± 1) °
Break all edges with 0,15 mm to 0,20 mm radius or 45° chamfer. Drawing is not to scale.

Kingpo Technology Development Limited is a pioneer and leader of global safety testing equipment manufacturer.We offer one-stop service for worldwide labs from R&D,testing,production to after-sales service.We dedicate ourselves in achieving optimal production quality for our customers,reduce cost and enhance enterprise’s international competitiveness.

Kingpo is accredited by International Electrotechnical Commission(IEC) and becomes a nominated supplier and is officially issued a CBTL certificate.We are now among the world’s leading laboratory testing equipment manufacturer to produce the highest level and more standard testing equipment for global Electrotechnics labs becoming nominated supplier of NEMKO,UL,PHILIPS,CTK,CVC(Vkan Certification & Testing Co.,Ltd),Dongguan Quality Testing,China Household Electric Appliance Research Institute,Russia National Standard Institute,Belarus National Standard Institute,Korea National Standard Institute,etc.Lamp cap gauges and testing equipments produced by Kingpo,which are calibrated by CNAS and ilac-MRA ,have a high international reputation.

Kingpo aims at manufacturing world class testing equipment for Chinese labs,establishing an independent R&D center and introducing foreign state-of-the-art technology and international high-tech talents.Adopting a creative design concept,taking sensor data acquisition as forerunner,computer control technology as lead,imported transmission device with high accuracy and low noises,we have developed more than one hundred and sixty products.

Lab software Lims system　

Material combustibility testing equipment　

ELectric tool testing equipment

Plug and socket testing equipment

Switch service life testing equipment　　　

Electrical accessories testing equipment

Luminaire testing equipment　　

Household appliances testing equipment　　　

Anti water spray testing equipment

Wire and cable testing equipment

IT product testing equipment　　　　

Battery testing equipment

Kingpo’s domestic customers include Entry-Exit Inspection and Quarantine Bureau, Bureau of Technical Supervision,Product Quality Supervision and Inspection Institute,UL Lab(Underwriter Laboratories),TUV Rheinland,SGS and other electronic manufacturer.Our products are exported to international market and have also established distributorships in HK,Vietnam,Singapore,Thailand,Iran,India,

Africa,New Zealand,Australia ,Germany and so on.

Service is an essential factor to improve enterprise’s competitiveness.Therefore,Kingpo has always made every effort in improve service level and service value.Before sale,we have professional engineering team to provide customers with comprehensive consultant and customized service.After sale,we have after-sale team to offer customer timely and satisfying technical support and product maintenance.

By means of excellent product competitiveness and complete service,our company has won numerous customers high praise and sincere trust.In complying with technical improvement and increased efficiency and quality assurance of these products ,we insist on providing high end products to market and dedicating to being a leader in testing equipment industry.