The MIC is used for reference measurements of smoke density:
In smoke tunnel measurements according to EN54-7
In fire sensitivity testing according to EN54-7/9
In the UL smoke box measurements according to UL 217 and UL 268
In other applications where accurate smoke measurements are required
The MIC smoke measuring system type EC-912 consists of the following parts:
MIC smoke measuring head
Multi-cable, 10 m (other lengths on request)
MIC control unit with power supply
Flow control unit with filter
Accessories, instruction manual, etc.
The smoke measuring head is installed at the measuring site and connected to the control unit via the multi-cable. The control unit, flow control unit and power supply are housed in a cabinet, which can be placed in an operator room. The vacuum pump can be placed in a convenient location.
Chamber quiescent current: 100 pA (nominal)
Chamber impedance: 1.9 x 1011 Ω ± 5%
Radioactive source: Am241
Activity: 129.5 kBq (3.5 μ Ci) ± 5%
Average a – energy: 4.5 MeV ± 5%
Time delay: < 10 sec. at 30 l/min. flow rate
The measuring head is calibrated against DELTA’s reference MIC within ± 3% smoke sensitivity
Calibration certificate is enclosed with each measuring head
19 inch bench top/rack cabinet with power supply for MIC
3.5 digit LED display of chamber voltage or smoke density
Manual zero and full-scale adjustment
Analogue outputs: X (0.0 – 10.0 VDC), chamber voltage Uc (14-25 VDC approx.)
Mains supply: 100-240 VAC, 50-60 Hz
Flow rate: Adjustable between 0 – 50 l/min.
Filter: Replaceable filter element
Mains requirements: 115 VAC ± 10%, 50-60 Hz or 230 VAC ± 10%, 50-60 Hz
Motor rating: Approx. 0.15 kW
Capacity: Approx. 60 l/min.