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AOSafety E-A-RTONE 3A manual Positioning of the E-A-RTONE, Cord Assembly and Unit Placement

Models: E-A-RTONE 3A

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3. Positioning of the E-A-RTONE®

When positioning the E-A-RTONE®unit on the subject, avoid sound tube contact with the subject’s clothing. Always use E-A- RLINK® tips in both ears, or block the opposite ear with an E-A-R®foam earplug.

4. Cord Assembly and Unit Placement

The cord assembly is zip-cord constructed. If more distance is needed between transducer cases carefully cut the insulation bridge between the two cords and separate them to the desired distance. The proper location for the transducer cases is on either side of the neck, not on the head. The metal clip equipped with a Velcro disk is intended to be used on the collar. A Velcro strap is also supplied to make an optional neck loop. Attach one end to each of the cases. The resulting loop can be positioned behind the neck with the cases resting on the shoulders and the cord in front hanging down the chest.

5. Blocked Tubing

If the clear sound tube is partially or fully blocked with fluid, wax, or other material, the sound output will be affected. To remedy the problem, take the sound tube off at the case nipple and either blow air or push a thin wire through the tube. If the tubes turn yellow or become damaged, replace them with new E-A-RTONE? specific parts. It is recommended that the sound tubes be replaced annually.

6. Tubing Characteristics

The consequences of changing the length of the front tubes will be a change in the frequency response of the E-A-RTONE®unit. The inner diameter, length and material used in the sound tubes have been carefully monitored by Auditory Systems to achieve maximum accuracy, background noise attenuation and proper frequency response. If replacement sound tubes are needed, use only Auditory Systems approved parts.

7. Pure Tone Calibration

When the E-A-RTONE®3A Insert Earphone is to be used as the primary transducer, the audiometer should be recalibrated using the reference thresholds provided in the standard ANSI S3.6-1996. The standard presents reference thresholds for the HA-1, HA-2 (DB 0138) and Ear Simulator 2cc couplers. However, the Bruel & Kjaer 2cc DB-0138 (HA-2) coupler will simplify the calibration procedure and is recommended. Reference thresholds for DB-0138, IEC 711, and HA-1 couplers are presented below. Should calibration be performed for an audiometer currently calibrated towards ISO-389, the reference thresholds in a 2cc DB-0138 coupler should be used. In order to calibrate the audiometer for direct readings of the hearing thresholds in dBHL using the reference thresholds, the following procedure is recommended. The instrumentation required is a Sound Level Meter with an appropriate condenser microphone calibrated according to the manufacturer’s specification. To the microphone, a 2cc coupler, Bruel & Kjaer DB-0138 is attached. The front tube of the E-A-RTONE®earphone is connected directly to the coupler (see illustration). Set the intensity dial on the audiometer to 70 dBHL and adjust the output from the audiometer to the SPL-values given for the different test frequencies in the table below. Repeat the procedure for all available test frequencies and in case of a dual channel audiometer, for both channels.

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AOSafety E-A-RTONE 3A manual Positioning of the E-A-RTONE, Cord Assembly and Unit Placement, Blocked Tubing
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E-A-RTONE 3A specifications

The AOSafety E-A-RTONE 3A is an advanced respiratory protective device designed for individuals working in environments where airborne hazards are present. Renowned for its effectiveness and comfort, the E-A-RTONE 3A is a favored choice among professionals in various industries, including construction, manufacturing, and chemical handling.

One of the standout features of the AOSafety E-A-RTONE 3A is its high filtration efficiency, which is crucial for providing reliable protection against particulate matter, dust, and other harmful airborne substances. The respirator is equipped with P100 filters that capture at least 99.97% of airborne particles, making it suitable for use in environments with higher levels of hazardous dust and aerosols.

The design of the E-A-RTONE 3A emphasizes user comfort, allowing for prolonged wear without discomfort. The adjustable head straps ensure a secure fit, while the soft, foam-rubber face seal conforms to the contours of the wearer’s face, reducing leakage and providing a tight seal against contaminants. This ergonomic design minimizes fatigue, enabling users to maintain focus on their tasks without the distraction of an uncomfortable respirator.

The E-A-RTONE 3A is also designed for versatility. It can accommodate various filter and cartridge types, depending on the specific requirements of the work environment. This adaptability makes it a go-to choice for users who may encounter different types of hazards or who work across various settings.

In addition to its protective features, the AOSafety E-A-RTONE 3A boasts an easy-to-use exhalation valve. This mechanism minimizes heat and moisture buildup inside the respirator, enhancing overall comfort during extended use. The valve facilitates exhalation while preventing the ingress of contaminants, thereby maintaining a clear respiratory path.

Moreover, the lightweight construction of the E-A-RTONE 3A ensures that it does not add unnecessary strain on the wearer. It’s designed to facilitate ease of movement, which is essential in active work environments. Users can wear it alongside safety goggles and other personal protective equipment, making it a versatile asset in any safety attire.

Overall, the AOSafety E-A-RTONE 3A combines high-efficiency filtration, comfort, and versatility, making it an excellent choice for anyone seeking reliable respiratory protection in potentially hazardous environments. Whether for professional use or DIY projects, this respirator stands out for its commitment to safety and user satisfaction.