By varying of nozzle pressure, number of switched-on nozzles and the aerosol temperature (except for ATM 241) one can adjust both particle production rate and particle size distribution in a wide range
Exact Scanning over the whole filter area The rectangular design enables the scanning of the filter corners too unlike circular probes which inevitably miss some areas.
Sampling probe designed to EN standard for cleanrooms Rectangular sampling probes are compulsory according to DIN EN ISO 14644, part 3, where test procedures for clean room classification are explained. Many users respond by using them.
Shorter filter testing times The scan rate of rectangular probes is lower compared to circular shaped probes due to the lesser height of the probe. The greater width on the other hand reduces the number of runs over the filter area, which enables a shorter filter testing time.
More accurate sampling The circular shape of conventional probes causes a systematic error due to the different scanning times as shown in the figure below. Rectangular shaped sampling probes overcome this problem and lead to an accurate measurement.
The ultrasonic desintegrator UDS 751/UP 200S is based on an innovative technical concept with a set of advantages:
Pro 1: The
new electronic unit with efficiencies of >90% allows a very
compact design. That saves laboritory space because no extra
HF-generator and cables are necessary. Both the
easy-to-use operating controls and the sample are in the same
range of vision.
Pro 2: The
innovative 24-KHz-oscillation system considers in comparison to
other 20-kHz-systems the current occupational medicinical
cognitions that are supported by expert opinion of Technical
Inspection Agency (TÜV). It is well below the human hearing
threshold level and avoids that hear-sensitive persons get
affected by ultra sonic waves.
Pro 3: The
realized technical concept guarantees highest
reliability, no-load and short-circuit safety, a save operation
and accurate compliance with adjusted amplitude under all
practical conditions. That applies for a wide range of sonotrodes even
if by cavitation mechanical wear occurs. By the used sonotrodes
material a long service life is assured.
Pro 4: A
new kind of frequency scanning allows a perfect start of sonotrode
oscillation even if there has been an extreme wear by cavitation after
long working hours.
Pro 5: The sonotrodes can be changed fast and easy. The device is protected against splash water from below.
Sedimentation analysis acc. to ISO 8486-2, ISO 6344-3, FEPA 43-D-T3 and FEPA 42-D-T3
Fully automated analysis with minimal operator input
User friendly Software (USSWin) enables visualisation, processing and storing of measured data
Instrument has standard serial interfaces
Applikationen:
For characterisation of
particle properties of electro-corundum and silicon carbide: to
determine particle size distributions of these materials.
This method is part
of the FEPA-Standard 43-D, which defines properties for electro-corundum and
silicon carbide in coated abrasives, part 3 testing of P240 to P2500
And also
the FEPA-Standards 42-D for conventional abrasives, part 3 testing of F230 to
F1200
Sedimentation analyses in other areas of
quality assurance
constant test conditions acc. to guideline EN 1822-4 by automated test procedure
effektive testing of bigger quantities
automatic issue of a test report as quality assurance during filter production process - also available for cost-effective test rig version with manual test
flexible use for varying filter dimensions
costumer-specific data reports/ test reports possible
easy-to-use control and data acquisition software AFS150Win
Time-saving reproducible detection of oil content after oil mist separator in blow-by of combustion engines
Installation of two different absolute filters possible. Selection by flow rate and filter charging:
Filter blank sheet with 110 mm diameter or
Filter cartridge with 65 mm diameter, L = 93 mm
Two independent sections: bypass and measuring. Running up to the working point over bypass section and measuring over measuring section. Prevention of undesirable filter charging.
Switching between both sections with pneumatic ball valves; feature: manual or automatic switching (by default time or differential pressure)
Heatable absolute filter box in order to avoid condensation (up to 110 °C)
Display for differential pressure at absolute filter (information about filter charging)
Display for blow-by-temperature and absolute filter temperature
Convenient device control with web browser
Easy to use, rugged, space-saving design
Applications:
Gravimetric benchmark of oil mist separators for crank case
ventilations in combustion engines by analytical determination of the
blow%u2011by oil content
Calibration of aerosol generators
Control and Data Acquisition for Devices and Test Stands
Direct data transfer to particle counter via cable (RS232/485, USB) or wireless connection (bluetooth, WLAN)
Simultaneous measurement with 2 or more particle counters
Realtime measuring data recording, analysis and plotting
Multitasking capable Windows-application
Can be continuously validated beginning from protocol printouts or display of particle counter up to evaluation tables by means of
Excel spreadsheet
In case of using the own protocol printout the data is consistently not modifiable, consistently verifiable.
Internal calculation of statistical parameters (mean values, confidence interval)
Free configurable time intervals (stabilisation, sampling/measuring and pause times, repeated measurements)
Interface for MS Office (Word, Excel) via dynamic data exchange (DDE) for automated assembly of entire protocols including possibility of formating/adding of own photos (flow visualisation, problem etc.)
The Measurement Procedure is
subdivided into the following steps:
1. Preparation:
a.
Checking of hardware completeness b. Input of all relevant data
for measurement that are saved and appear on the protocol later c.
Positioning of all model sources and aerosol outlets in the protection
area
2. Initial
operation:
a. Initial operation of aerosol
system b. Zero reference measurement (optional) c. Adjustment of the aerosol system to reference source strength d.
Execution of a source strength measurement that is used as reference
point for the complete measurement e. Determination of protection
area (manually)
3.
External loading input:
a. Zero reference
measurement (optional) b. Measurement of all measurement points
defined in the standard under external loading input
4. Internal loading input:
a.
Zero reference measurement (optional) b. Measurement of all
measurement points defined in the standard under internal loading input
5. Data interpretation
a.
Measurement is finished b. Protection grade of the OP-room is
determined c. Protocol is displayed
Constant and reproducible aerosol dilution even under changing operation conditions
Continuous control and display of actual dilution ratio
By default aerosol dilution ratio of 1:100 at 28,3l/min intake flow rate of a particle counter
Designed for mobile use (no auxiliary pressurized air and additional exhaust needed)
Long term lifetime and reliability, minimum maintainance required
Precise operation in both over and under pressure mode
Modifications to user defined requirements (flow rates, dilution ratio) available
In combination with particle counters self-priming system
Dilution systems of series DIL can easily be cascaded in order to achieve higher dilution ratios. For instance by cascading a 1:100 and a 1:10 dilution systeme one gets an overall dilution ratio of 1:1000.
Applications:
Validation of laminar air flow boxes/benches
and clean room/environments
Suitable for various operation flows (particle
counter flows)
Monitoring the particle counter flow rate
Maintains gas characteristics of original
aerosol
Totally self-contained
The device is easy and safe to operate. The power supply can either be from the mains or from a battery. Thus, it is flexible to use and can be utilised in combination with different particle counters. The dilution system is applicable for volume flows from 0.4l/min to 3l/min. The range of adjustment of the dilution ratio depends on the current total volume flow. For example, for a volume flow of 1l/min dilution factors from 10 to 370 can be adjusted.
Applications:
Checking HEPA- and ULPA-filters
Validation and test of clean room equipment
Filter media verification
Aerosol research
Verification
of aerosol generators and powder disperser
Wide range of dilution ratios adjustable (1:100 up to 1:100,000)
Factory-provided adaptable to different volume flow rates of the particle counter: from 28 l/min up to 100 l/min
High reliability in service by using a capillary with relative big diameter for a given dilution ratio
Possibility of checking the present dilution ration via remote control
Adjustment of dilution ration via remote control
Applications:
Dilution for general measuring purposes of high concentrated aerosols that are not directly measurable with particle counters
Dilution
of output aerosol of aerosol generators in order to generate defined,
adjusted diluted aerosols, e.g. for calibration or comparison of
particle counters
Monitoring of source strengths of aerosol generation systems, e.g. for clean room monitoring systems
Designed to comply with the requirements of the German standard DIN 1946-4 and the Swiss guideline 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 German DIN 1946-4 and Swiss SWKI 99-3 and VDI 2167 Part 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)
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