TC30
EMISSION CONTROL PROBE Tribo-Check® 4÷20 mA
PLEASE READ THE WHOLE USER MANUAL CAREFULLY BEFORE INSTALLING THE EQUIPMENT
DOCUMENTATION CONTENTS
1. General description
2. Installation rules
3. Electrical wiring diagram
4. Technical characteristics
5. Positioning and functioning
6. Calibration
7. CE Certification
1. GENERAL DESCRIPTION
1.1 PREREQUISITE
The need to signal in advance possible leakages of the dedusting system avoiding high costs of environmental reclamation
and of plants stop-overs brought, since a long time, to the use of electronic equipments dedicated to a better
environmental safeguard. With the use of these devices it is possible to signal any failure that can produce dangerous
emissions in the atmosphere which are symptom of breakdown in the dedusting plant. Especially, it is possible to control
any breaks of the filtering surfaces, broken bags or cartridges.
The use of TC probes allows therefore to identify the dust particles which are present in the gases that go through the filter
due to any breaks or failures of the bags or cartridges where the quantities of dusts to remark are considerable 100÷400
mg.
For a correct functioning of the TC probe, the cartridges or the bags must be mounted in a vertical position.
The TC probe is seldom used for the continuous monitoring of the dustiness degree present in the discharge duct of the
gases in the atmosphere.
The above-mentioned use entails a more complicated calibration and a deep knowledge of the device.
1.2 TRIBO-CHECK® TC PROBE OPERATION PRINCIPLE
The probe’s operation principle is founded on the TRIBO ELECTRIC ‘T-E’ effect.
This physical phenomenon is caused by the friction of particles suspended in the air against the surface of a probe which
is placed in the measurement area. Particular electronic circuits which are located inside the probe allow to transform the
static electricity generated by the T-E phenomenon into the electric signal proportional to the quantity of particles that
generated it.
1.3 SENSITIVITY TO THE 'TE' EFFECT
The sensitivity to the TRIBO-ELECTRIC effect of the probe varies according to the type of dusts to be monitored. On the
basis of acquired experiences, it has been established that this sensitivity, namely the possibility that the probe
generates an electric signal consequently to the collision of the particles suspended in the gases to be monitored, starts
with minimum dust concentrations from 3÷8 mg/m3 to 200 mg/m3 in an acceptable linear way.
The signal generated by the TC probe depends on the type of material analyzed, the speed of the gas in the duct, the
probe’s length and the density of the particles in the duct.
1.4 OPERATION
The TC probe notes the passage of particles which are present in the gases by turning this physical phenomenon into an
electric signal 4÷20 mA proportional to the dustiness degree.
A rotary switch located inside the head of the probe (SW 21) allows to change the amplification of the exit signal in order
to permit a correct use of the TC probe in the most part of the dedusting systems.
The output signal (4÷20 mA) can be adjusted to program the activation of any alarms when the dust emissions overtake
the values which have been set according to the law restrictions allowed.
Code:
TC30-500
S/N:
Date: 23 / 02 / 2012
ESACODE Ver. 12.0
