SGM LEKTRA TC22 Guide

TC22/23/24/25
Capacitance level transmitter - electronic preampli•er
technical documentation EN Rev. S

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TC22÷25 - contents
CONTENTS
1-WARRANTY
2-PRODUCT
3-TECHNICAL FEATURES
4-DIMENSIONS
5-MECHANICAL INSTALLATION
6-ELECTRICAL CONNECTIONS
7-CALIBRATIONS
8-REMOTE VERSION
9-FACTORY TEST AND QUALITY CERTIFICATE
page 3
page 4
page 5
page 6
page 7
page 8
page 10
page 15
page 16

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TC22÷25 - warranty
Products supplied by SGM LEKTRA are guaranteed for a period of 12 (twelve) months from delivery date accor-
ding to the conditions specifi ed in our sale conditions document. SGM LEKTRA can choose to repair or replace
the Product. If the Product is repaired it will maintain the original term of guarantee, whereas if the Product is
replaced it will have 12 (twelve) months of guarantee.
The warranty will be null if the Client modifi es, repair or uses the Products for other purposes than the normal
conditions foreseen by instructions or Contract. In no circumstances shall SGM LEKTRA be liable for direct, in-
direct or consequential or other loss or damage whether caused by negligence on the part of the company or its
employees or otherwise howsoever arising out of defective goods.
1-WARRANTY

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TC22÷25 - product
2-PRODUCT
1. Led indicators
2. Terminals for electrical connections
1.2 IDENTIFICATION
Each instrument has an adhesive identi! cation plate on which are the meter main data. The following picture describes the
information and data on the identi! cation plate.
1. Product code 3. Serial number2. Power supply
1
2
3
4
3. Programming buttons
2. Fixing system to the probe
400A072B - TC22
24Vdc
CCE091501066
2
3
1Mod.
P.S.
S.N.
2

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3-TECHNICAL FEATURES
TC22÷25 - technical features
Housing material
Nylon; metallized Nylon
Mechanical fitting
Bajonet (to be insert into IP66/67 enclosure)
IP rating
IP50
Electrical connection
1 x 6 pole plug-in connector
Working temperature
-30 ÷ +80°C
Power supply
TC22 24Vdc
TC23 24 Vac 50Hz
TC24 115 Vac 50Hz
TC25 230 Vac 50Hz
Measure range
30pF ÷ 10.000pF
Consumption
Max 2.5W (1.5W Vdc)
Analog output
4÷20 mA (max 500ohm)
Serial output
RS485
Termichal drift compensation
by ref. internal capacitor
Linearity
±0.5%
Calibration
two push-buttons, for self-acquisition
Led display
Flashing LED: run mode
Fixed LED: calibration mode

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TC22÷25 - dimensions
4-DIMENSIONS
60 mm
120 mm
51 mm 27 mm

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5-MECHANICAL INSTALLATION
5.2 INSTALLATION
The TC22÷25 insert must be lodge into the IP66/67 capacitancesensor head connection. Important to screw tight
the cover of the head connection and the cable gland in order to grant the sensor IP66/67. Thanks to the bayonet
! xing-system, to insert or remove the TC22÷25 from the head connection need to push and rotate. Rotate clock-wise
to ! x into the head Rotate reverse-clock-wise to remove from the head. No screws or conventional mounting system
required. Important" Fully tighten the cap and cable glands to prevent water in! ltration and ensure the IP66/67 pro-
tection.
TC22÷25 - mechanical installation
5.1 SAFETY MEASURE
- Installation must be only performed by quali! ed personnel and in accordance with local governing regulations.
- The equipment must be used only after having correctly transposed the instructions of this manual
- The power supply and electrical connections plate data must always be respected
- Improper device use would cause serious damage to people, to the product and connected equipment

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TC22÷25 - electrical connection
6-ELECTRICAL CONNECTION
6.1 CONNECTIONS
The TC22÷25 capacitive transmitter can be supplied in DC or AC voltage depending on the model as shown in the
following images.
The current consumption is less than 1,5W for Vdc power supply and 2,5W for Vac power supply. The TC22÷25 ca-
pacitance trannsmitters are lodged into the sensor capacitance head connections; remove the cover unscrewing and
opening the upper part, gain the access to two 6-pole plug-in connectors. Electrical connection must be made with a
multi-wires round cable of proper diameter, otherwise the seal of the cable gland may be impaired. No special cable or
coax-cable are requests for compact version, and no practice distance limits. For the Vdc power supply take in conside-
ration that the negative of the power supply is electrically connected to the negative output current. For the Vac power
supply versions, from the power supply and the output current there is a galvanically separation.
P2
P1
+4÷20mA
Probe
SCH
A
-
B RS485
+
-
24Vdc
L
N
GND
P2
P1
+4÷20mA
Probe
SCH
A
-
B RS485
TC22 24Vdc
TC23 24Vac TC24 115Vac TC25 230Vac

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TC22÷25 - electrical connection
6.2 REMOTE ELECTRODES CONNECTIONS
Connecting the coaxial cable for probes version with electronic separate from the electrode.
Probe (red)
SCH (yellow/green)
GND
6.3 GROUNDING CONNECTION
Always connect the electrode to vessel ground. For this purpose there is a terminal on the side of the housing or on
the mechanical connection. This connection is also used to supply the ground reference potential as well as to drain
off electrostatic charges.

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7-CALIBRATION
7.1 CALIBRATION
The TC22÷25 calibration can be made by means the P1 and P2 push-buttons in two different procedures:
a) Full-Empty Calibration.
b) High and Low-point Calibration.
To calibrate, needs to lodge the “TC22÷25” into the head connection of the capacitance sensor installed into the vessel
or tank in which needs the level measurement. Depends to the possibility to reach easily 0% and 100% level is pos-
sible to use: “Full-Empty Calibration” or, when 0% and 100% level can’t be reached “High and Low-point Calibration”
procedure can be used, see fig.below.
Important!
The calibration can be done first with empty and than with full (as the above procedure) or first with full and than with
empty as well.
TC22÷25 - calibration
4mA 20mA
0%
100%
empty
full
high
point
low
point
level
full
100% 20mA
empty
0% 4mA
intermediate points
calibration
high
point
low
point

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TC22÷25 - calibration
7.2 EMPTY AND FULL 4÷20mA CALIBRATION
The TC22÷25 transmitter can be calibrate in respectively at the level of 0% and 100% level, in order to memorise the
relevant capacity electronically.
7.2.1 0% (4mA) calibration
needs to have the level at the 0%.
Press simultaneously P1 and P2, release them and verify that “Mode led” will stay !x lightened.
Press two times P1. The measured capacity has been memorised and associated to 4mA output.
Press simultaneously P1 and P2 again to switch in measure mode (Mode led flashing).
Mode
Flashing LED
Measure
Mode
Fixed LED
Mode
Flashing LED
Measure
Empty Calibration 0% 4mA
Mode
Fixed LED
Mode
Flashing LED
x 2

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TC22÷25 - calibration
7.2.2 100% (20mA) calibration
needs to have the level at the 100%.
Press simultaneously P1 and P2, release them and verify that “Mode led” will stay fix lightened.
Press two times P1. The measured capacity has been memorised and associated to 20mA output.
Press simultaneously P1 and P2 again to switch in measure mode (Mode led flashing).
Mode
Measure
Mode Mode
Measure
Full calibration 100% 20mA
Mode Mode
x 2
Flashing LED Fixed LED Flashing LEDFixed LED Flashing LED

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TC22÷25 - calibration
Mode
Flashing LED
Measure
Mode
Fixed LED
Mode
Flashing LED
Measure
Low Point calibration 4mA
Mode
Fixed LED
Mode
Flashing LED
x 2
7.3 HIGH AND LOW POINT CALIBRATION
7.3.1 Low Point calibration
If only a limitate level variation is possible, the calibration of the TC22-5 is still possible. Need to connect a cur-
rent-meter on the TC22-5 output current and verify the present level point at which make the calibration. Suppo-
sely you are on the Low-point calibration, and the relevant level is 26%(8,16mA) than;
Press simultaneously P1 and P2, release them and verify that “Mode led” will stay fix lightened, Open the calibra-
tion mode. Press two times P1. The measured capacity has been associated at the moment to 4mA output. Now,
pushing few times the P2 key, increase the output current from 4mA to 8,16mA, (P1 decrease the value). Once the
correct current-output is displayed in to the current meter; press simultaneously P1 and P2 again to Exit from
calibration going in measure mode (Mode led flashing).

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TC22÷25 - calibration
7.2.2 High Point calibration
Increase the level of your product as much as possible, for instance up to 58%(13,28mA) than; Press simultane-
ously P1 and P2, release them and verify that “Mode led” will stay fix lightened, Open the calibration mode. Press
two times P2. The measured capacity has been associated at the moment to 20mA output. Now, pushing few
times the P1 key, decrease the output current from 20mA to 13,28mA, (P2 increase the value) ; press simultane-
ously P1 and P2 again to Exit from calibration going in measure mode (Mode led flashing).
Important!
The calibration can be done first with low-point and than with high-point (as the above procedure) or first with
high-point and than with low-point as well.
Mode
Flashing LED
Measure
Mode
Fixed LED
Mode
Flashing LED
Measure
High Point calibration 20mA
Mode
Fixed LED
Mode
Flashing LED
x 2

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8-REMOTE VERSION WITH FIXING BASE
The Rand Sversions of the CLTx capacitive probes have an aluminum base. It is used to fix the housing and connect
the coaxial cable from the electrode.
To connect the coaxial cable, proceed as follows:
A - Unscrew the four screws on the base bottom
B - Rotate the housing to access the inside of the aluminum base
C - Connect the red wire to the central connection point (electrode signal) and the yellow-green cable to the lateral
connection point (cable shield)
D - Tighten the 4 screws on the base bottom
E - Tighten the cable gland
F - Fix the housing
ABC
DEF
red
yellow/
green
TC22÷25 - remote version

In conformity to the company and check procedures I certify that the equipment:
is conform to the technical requirements on Technical Data and it is made in conformity to the procedure
Quality Control Manager: .......................................................... Production and check date: .................................................
9-FACTORY TEST AND QUALITY CERTIFICATE
Documentation subject to technical change with no prior warning
SGM-LEKTRA S.r.l.
Via Papa Giovanni XXIII, 49
20090 Rodano (MI) - ITALY
tel: ++39 02 95328257
fax: ++39 02 95328321
e-mail: [email protected]
web: sgm-lektra.com
(electronic preamplifier) (capacitive probe)