FMS 375
FMS 375 Measuring System with dilution and sample switching for the determination of fractional separation efficiency of e.g. oil mist separators or filters
Standards
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product sheet FMS 375Benefits
- operable at both over and lower pressure
- automated and remote-controlled operation
- mobile use (optional trolley kit)
Applications
- characterisation of particle size distributions and particle numbers of aerosols
- evaluation of fractional separation efficiency of oil mist separators and filters
- compact design for the use at engine test stations or in laboratory test setups (e.g. SPT 140)
The FMS 375 has to be connected to the sampling points of a test set-up. These are then individually controlled via the automated switching unit. If necessary, the sample is conditioned before characterisation by means of the dilution systems. The dilution factor can be varied in three steps. The particle inlet concentration defines the necessity for none, one or two dilution systems for lowering the concentration towards the acceptable concentration range for the aerosol spectrometer. Afterwards, the conditioned aerosol passes the measuring cell of the aerosol spectrometer.\r\nThe measurement zone is illuminated by light of two different wavelengths, which originates from two laser diodes with high lifetime. The light, which is scattered by the particles or droplets, is collected and recorded by a photodetector. The optical signals are converted into electrical ones and are processed. Signal evaluation is performed by the firmware. Results like the particle size distribution and the particle number concentration are visualised on a display.
| Parameter title | Unit | Value |
|---|---|---|
| measuring range, particle size | µm | 0,2 ... 40 |
| measuring range, concentration | #/cm³ | < 4 × 10⁸ |
| sample flow rate | L/min | 3 |
| analytical flow rate | L/min | 0,1 |
| operating medium, gas/air - compressed air supply | bar | 4 ... 8 |
| power supply | - | 110 … 240 V, 50 … 60 Hz |
| communication interface | - | ethernet, USB |
| connector, sample inlet | mm | 8 (outer diameter) |
| aerosol temperature | °C | max. 120 |
| environmental condition, ambient pressure | bar | +/- 0,8 |
| dimensions (w × h × d) | mm | 530 × 440 × 500 (w/o grip); 650 × 570 × 500 (with grip) |
| weight | kg | 33 |
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