Application and function
The OPM 04 (Optical Particle Monitor) is an optical dust monitor that
uses advanced dynamic opacity techniques to achieve high levels of
accuracy coupled with very low maintenance requirements.
A near infra-red beam of light, sensitive to dust particles is projected
through the duct to a receiver. Rapid changes in dust particle concentration
within the duct cause short-term variations in the received opacity
signal. This modulated opacity signal is proportional to the mass
concentration of particles. To calibrate the OPM 04 requires a standard
reference method test such as EPA Method 5, EN 13284-1 or VDI 2066.
The advantage of this technology is that the signal processing system
is unaffected in long term changes in opacity caused by dust on the
lenses or mis-alignment of the sensors.
Specifications
| PRODUCT
SPECIFICATION |
DESCRIPTION |
| Control unit: |
Wall assembly (IP
66) or 19" rack (optionally) |
| Probe: |
2 optical sensors,
IP 65 |
| Measuring principle: |
Dust: dynamic opacity
|
| Measuring range: |
0 ... 10 (3.000) mg/m³
|
| Calibration: |
By gravimetric reference
measurements (for tendency measurements and filter analysis
not required) |
| Display: |
20 characters line
display |
| Media temperature: |
-20 ... 700 °C |
| Ambient temperature: |
-20 ... +50 °C
|
| Dew point
difference: |
min. +5 K |
| Flow velocity: |
From appr. 4 m/s |
| Analogue signals: |
1 x 4 ... 20 mA (dust)
|
| Digital signals: |
RS 485 / 232 or Modbus,
Profibus on demand |
| Power supply: |
24 VDC |
| TÜV-Approval: |
None |
|
