Application and function
The filter controller PFM 92 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 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.
Specifications
| PRODUCT
SPECIFICATION |
DESCRIPTION |
| Control unit: |
Weather-proof aluminium
case IP 65, Dimensions: 210 x 240 x 280 mm (H x W x D)
|
| Probe: |
Stainless steel probe
rod with pre-amplifier in the probe head, 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: |
LCD-Display (0 ...
100 %) |
| 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 |
|
