Application and function
The filter controller PFM 92 C serves the qualitative monitoring of
dusty emissions. In particular it is often used for the registration
of the clean gas dust content behind de-dusting facilities. The measuring
principle is based on the use of the triboelectric effect (charge
transfer at colliding or passing of particles on leading surfaces).
The filter controller consists of an isolated probe which is installed
in the clean gas channel. The complete electronic is integrated in
the probe head. No additional control unit is required. The charge
transferred by contact and triboelectric processes is derived as current,
converted in the evaluation unit, amplified and provided as norm signal
4 ... 20 mA. Via a limit value detector the exceeding of the allowable
emission limit value can be signalised optically or acoustically.
Due to the compact design the measuring device is especially suited
for the construction of complex monitoring systems with several emission
sources.
Specifications
| PRODUCT
SPECIFICATION |
DESCRIPTION |
| Control unit: |
No control unit required
|
| Probe: |
Round stainless-steel
probe rod at the probe head, complete electronic in the
probe head – no separate control unit, probe
length 300 mm (adjustments possible), IP 65 |
| Measuring principle: |
Dust: measurement
with 1 triboelectric sensor |
| Measuring range: |
0,1 ... 1.000 mg/m³
(special measuring ranges on demand) |
| Calibration: |
By gravimetric reference
measurements |
| Display: |
none |
| Media temperature: |
max. 280 °C |
| Ambient temperature: |
-20 ... +50 °C
|
| Dew point
difference: |
min. +5 K |
| Flow velocity: |
From appr. 3 m/s |
| Analogue signals: |
1 x 4 ... 20 mA (dust)
|
| Digital signals: |
3 potential-free contacts
(failure, limit value 1 and 2) |
| Power supply: |
110 VAC, 230 VAC or
24 VAC, 24 VDC |
| TÜV-Approval: |
TI-Air |
|
