AEROTEST to measure the cleanliness of breathing air
Increasing damage to the environment and enforced regulations for breathing air quality such as DIN EN 12021 mean that the requirements to be met by the operators of filling stations are getting stricter all the time.
With the AEROTEST SIMULTAN HP portable breathing air tester to measure cleanliness, you will always be on the safe side!
Tester tubes simultaneously and accurately measure compliance with the concentration limit for CO, CO2 and water vapour in the compressed air. An "impactor" is used for simultaneous verification of mineral and synthetic oil content in the breathing air.
The breathing air tester has been to all but exclude the risk of incorrect measurements as a result of operator error. The device does not have to be calibrated either.
A pressure reducer and special nozzles keep volume flow constant at all times, thereby safeguarding consistently accurate measurements. The AEROTEST SIMULTAN HP breathing air tester checks for compliance with the limit values specified in standard DIN EN 12021¹ for breathing air¹, thereby providing effective protection for life, health and equipment.
¹ Check for concentration of CO, CO2, water vapour and residual oil. Oxygen content is not measured.
All the information you need at your fingertips!
The measuring principle (verification of oil content)
Compressed air flows through the 20 nozzles of the impactor and vertically hits a baffle plate made from cut glass.
On account of the air being deflected 90° in the impactor, the aerosol particles are unable to follow the airflow due to their inertia and are separated on the glass plate.
The indentations in the cut glass are filled with oil, counteracting the light scattering caused by the cut glass. This principle provides a visual indicator of very low oil quantities.
Thanks to the special arrangement of the nozzles, it is possible to measure the quantity of oil separated. The measurement result is not depending upon oil type.
However, remember that oil aerosols solidify at increased temperatures and there are no visual signs of vapour. Although compressed air cools during depressurisation, this is not relevant for the specified temperature range.
Measurement and evaluation
- Connect the AEROTEST SIMULTAN HP breathing air tester to the compressor, the compressed air cylinder or the compressed air line.
- Prepare the breathing air tester by flushing through the compressed air to be tested for at least 3 minutes (without the impactor).
- The volume flow (4 l/min) is prescribed automatically by the breathing air tester.
- Slide the impactor into the connecting adapter as far as the stop.
- Insert the connecting adapter into the measuring instrument of the breathing air tester in the direction of the arrow (the open side of the adapters should point towards the measuring instrument).
- Insert the tester tubes into the measuring instrument of the breathing air tester.
- Take the measurement. Take the measurement for 5 minutes (use the breathing air tester's stopwatch).
- Peel the protective film away from the impactor and read off the oil concentration.
| Carrier case | Length × width × height (mm): | 350 × 300 × 85 |
|---|---|---|
| Colour: | Black | |
| Weight with contents: | approx. 3 kg | |
| Pressure reducer | Input: | male thread G5/8-300 bar (connection by hand) |
| Max. intake pressure: | 300 bar | |
| Pressure gauge: | 0 to 400 bar | |
| Output: | 9 mm plug-in connector for measuring instrument | |
| Overpressure valve: | set to 10 +2 bar | |
| Adapter 1 | Input: | female thread G5/8-200 bar |
| Output: | female thread G5/8-300 bar for pressure reducer | |
| Adapter 2 | Input: | female thread G5/8-200 bar |
| Output: | female thread G5/8-300 bar for pressure reducer | |
| Measuring instrument | Length × width (mm): | 100 × 38 |
| Height including Dräger tube mount (mm): | 230 | |
| Connection for compressed air supply | 9 mm nipple | |
| Intake pressure | Set on delivery: | 8.5 bar |
| Volume flow | CO and CO2 tubes: | 0.2 l/min |
| Impactor and H2O tubes: | 4 l/min | |
| Tubes for nitrous gases: |
| Carrier case | Length × width × height (mm): | 350 × 300 × 85 |
|---|---|---|
| Colour: | Black | |
| Weight with contents: | approx. 3 kg | |
| Pressure reducer | Input: | Nipple |
| Max. intake pressure: | 15 bar | |
| Pressure gauge: | 0.3 to 15 bar | |
| Output: | 9 mm plug-in connector for measuring instrument | |
| Overpressure valve: | none | |
| Adapter 1 | Input: | 9 mm coupling |
| Output: | Male thread G 1/4 | |
| Adapter 2 | Input: | Female thread G 1/4 |
| Output: | 12 mm nipple | |
| Measuring instrument | Length × width (mm): | 100 × 38 |
| Height including Dräger tube mount (mm): | 230 | |
| Connection for compressed air supply | 9 mm nipple | |
| Intake pressure | Set on delivery: | 3.0 bar |
| Volume flow | CO and CO2 tubes: | 0.2 l/min |
| Impactor and H2O tubes: | 4 l/min |
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