ADD 536 Aerosol Distribution System
Aerosol Distribution and Dilution System ADD 536 for protection grade measurements in operating rooms according to DIN 1946-4
The Aerosol Distribution and Dilution System ADD 536 was developed by Topas for protection grade measurement in operating rooms according to DIN 1946-4 and SWKI VA105-01 (formerly SWKI 99-3). It provides test aerosol generated by an aerosol generator (e.g. Topas ATM 228) at six different outlet ports with a defined source flow, especially for verification of hospital operating rooms.
Hospital operating rooms are specially designed to avoid contaminations and therefore additional infections of patients during operations. To assure a low level of particle contaminations a laminar air flow is applied to the operating table.
To verify the retention efficiency of this flow regime a verification with a defined test aerosol is required according to the standards DIN 1946-4 and SWKI VA105-01 (formerly SWKI 99-3). For that reason a total particle rate of 6,3 × 109 #/min has to be distributed to six different positions and emitted with a reliable long term stability. From the standards it is also required that this total particle rate is continuously monitored and controlled by a particle counter.
The Aerosol Ditribution and Dilution System meets all these required demands for providing a defined test aerosol with the following features:
To verify the retention efficiency of this flow regime a verification with a defined test aerosol is required according to the standards DIN 1946-4 and SWKI VA105-01 (formerly SWKI 99-3). For that reason a total particle rate of 6,3 × 109 #/min has to be distributed to six different positions and emitted with a reliable long term stability. From the standards it is also required that this total particle rate is continuously monitored and controlled by a particle counter.
The Aerosol Ditribution and Dilution System meets all these required demands for providing a defined test aerosol with the following features:
- Internal generation of a total nominal flow (free of particles) for supplying the six outlet ports
- Homogeneous mixing of the test aerosol coming from an external aerosol generator with this total transportation flow
- internal adjustable aerosol dilution ratio for direct connection of a particle counter (e.g. Topas LAP 340) used for controlling a stable particle rate
- uniform aerosol distribution to six outlet ports
Standards
DIN 1946-4
VDI 2167-1
SWKI VA105-01
SWKI 99-3
Benefits
- designed to comply with the requirements of the national guidlines/standards DIN 1946-4 and SWKI VA105-01 (formerly SWKI 99-3)
- reliable particle generation rate with an excellent long term stability (particles/time)
- status information on dilution ratio and total flow rate integrated at the front
Applications
- protection grade measurement of operating rooms/theatres according to DIN 1946-4 and SWKI VA105-01 (formerly SWKI 99-3) and VDI 2167-1
- generation of test aerosols by providing a reliable, reproducible, long term constant, but concentration variable particle stream in connection with a high-concentration particle source e.g. for verification or calibration of particle counters (dilution series with PSL aerosols)
The ADD 536 mixes the aerosol provided by an aerosol generator (e.g.: ATM 228) with a defined transport flow rate and distributed it to six vents and a particle counter port.
The operation of the ADD 536 requires an additional suitable aerosol generator (aerosol flow rate up to 5 L/min, particle generation rate > 6,3 10⁹ #/min) and a suitable particle counter (sample flow rate of 2,83 L/min or 28,3 L/min).
| Parameter title | Unit | Value |
|---|---|---|
| aerosol, volumetric flow rate | L/min | min. 100 (devices supplied 100 L/min transport air) |
| power supply | - | 230 V AC |
| operating medium, gas/air | - | ambient air (fitlered internally) |
| operating medium, aerosol | - | aerosol from additional aerosol generator |
| vents for aerosol outlet | - | quantity 6, diameter 65 mm |
| hose connector, vents | - | quantity 6 | outer diameter 10 mm |
| hose connector, particle counter | - | quantity 1 | diameter 10 mm |
| dimensions (w × h × d) | mm | 250 × 340 × 330 |
| weight | kg | 8,5 |
- optical particle counter (flow rate: 0.1…1 cfm, lower detection limit >0.3 µm, e.g. Topas Cleanroom Particle Counter LAP 340) (necessary accessory)
- aerosol generator (flow rate <300 l/h, particle rate >6.3 10⁹ #/min, particle output adjustable, e.g. Topas Atomizer Aerosol Generator ATM 228) (necessary accessory)
- software package OPQWin for automated data acquisition and printout protocoll as result according to current standards or guidelines of protection grade measurements (complementary accessory)
- software package PASWin for automated data acquisition and device control of optical particle counters (complementary accessory)