E.L.B. TK-101 Service manual

E.L.B. Füllstandsgeräte Bundschuh GmbH & Co. KG - An der Hartbrücke 6 - D-6 625 Bensheim - Phone:+ 9.6251 8 620 Fax:+ 9.6251-8 6272
Web: www.elb-bensheim.de eMail: [email protected]
Measuring Transducer TK-101
Mounting- and Operating Instructions
Ex-Zone 0 Category 1
Important sa ety instructions please read and note
If the transducer is to operate smoothly and safely, it is vital that it is transported, stored and
assembled appropriately, installed and commissioned correctly, used only as intended and repaired as
required. These actions should only be performed by individuals with the required specialist
knowledge and corresponding qualifications.
The applicable safety regulations for the erection and operation of electrical systems in explosion risk
areas shall be observed. Your particular attention is drawn to the erection provisions in accordance
with EN 60079-0, EN 60079-11, EN 60079-26, for electrical plants in areas subject to explosion
hazards. The attached EC-type examination certificate TÜV 02 ATEX 1795 X respectively
IECEx TUN 17.0036X must also be observed.
Should the information contained in the instructions below prove to be inadequate in any way, please
contact the manufacturer.
Application
The TK-101 transducer is integrated directly into the connection socket of our continuous filling level
probes of the type series TK-30... It converts the resistance signal of the continuous level measuring
sensors into a unit current signal ( ..20 mA) proportional to the filling level height. installed in the
float. The TK-101 has a potentiometer for zero adjustment (MIN), an for 100% setting (MAX).
Mounting
The TK-101 is intended for the installation into a housing, which offers suitable protection against the
respective ambient conditions during operation. At the factory, the TK-101 is integrated into the
respective TK-30_ housing.
Electrical connection
If the probe is used in hazardous areas, it may only be operated via a Zener barrier or an approved
Ex-supply device. The electrical connection must be made without power.
Version 05/03/2018 Errors and changes reserved Pages: 1of 3

E.L.B. Füllstandsgeräte Bundschuh GmbH & Co. KG - An der Hartbrücke 6 - D-6 625 Bensheim - Phone:+ 9.6251 8 620 Fax:+ 9.6251-8 6272
Web: www.elb-bensheim.de eMail: [email protected]
The sensor line should not be installed in close proximity of power currents. If this cannot be avoided,
the use of a shielded cable can reduce interferences through coupling.
TK-101 Pin assignment
+
Supply voltage Ui: +28 VDC; Ii: 93 mA; Pi: 660 mW
-
Output … 20 mA (for input of display, SPS ect. )
ABOVE
Upper start of the resistor chain (wire color yellow) (internal connection)
BELOW
Bottom start of the resistor chain (wire color red) (internal connection)
TAPPING
Pickup of the current resistance value (wire color black) (internal connection)
Function
After the electrical connection has been completed, the TK-101 is operational and provides the current
value in accordance with the input signal to the output loop.
When ordering, the TK-101 is aligned with the output current range ( ...20 mA).
In case the connection to the transmitter chain is defective, the signal is displayed with a current
value of I > 22 mA (except 100% connection). The supply voltage in the electric circuit of the unit
depends on the burden resistance. For more information, refer to the supply voltage range specified in
the technical data.
The TK-101 transducer always saves the most current measured value.
Function diagram
No
.
Function/designation Device TK-101 Comments
1 0 % indication Float, bottom position ( mA) Device provides an output current of approx. mA
2 50 % indication Float, center position (12 mA) Device provides an output current of approx. 12 mA
3 100 % indication Float, top position (20 mA) Device provides an output current of approx. 20 mA
Errorlimit = ±1%; FSO= ±0,2 mA; burden resistance 500 ΩFor an inverse display
(100% indication = float, bottom position), the connection wires 0% and 100% have to be exchanged
For an inverse display (100% indication = float, bottom position),
the connection wires 0% (RED) and 100% (Yellow) have to be exchanged.
Functional check / adjustment
Potentiometer adjustment
If this setting is to be changed, the "cover" of the housing needs to be removed. A current measuring device with
a measuring range of 30 mA is required and must be connected to the current loop.
Zero offset „0 %“ Max offset „100%
For this purpose, the resistance sensor must provide a
signal, which shall be used as zero position. On the
"Zero" potentiometer, the output current can now be set
to the required value.
For this purpose, the resistance sensor must provide a
signal, which shall be used as the maximum signal
value. On the "Max" potentiometer, the output current
can now be set to the required value.
Version 05/03/2018 Errors and changes reserved Pages: 2of 3

E.L.B. Füllstandsgeräte Bundschuh GmbH & Co. KG - An der Hartbrücke 6 - D-6 625 Bensheim - Phone:+ 9.6251 8 620 Fax:+ 9.6251-8 6272
Web: www.elb-bensheim.de eMail: [email protected]
Mounting/Handling/Maintenance
Transducers are measuring instruments and be handled carefully. Generally, external forces such as
impact, shock, bending, etc. should be avoided. The TK-101 does not require special maintenance
beyond the general inspection/function check of the electrical equipment. Due to its installation in a
housing, cleaning of the TK-101 is not required. If cleaning is necessary, however, cleaning of the
device is only allowed while no voltage is applied; use a dry cloth or a fine brush for the cleaning
process.
Technical Data See datasheet heading 1 , 1 -01-01 ( www.elb-bensheim.de )
Input
Resistance range in three-wire circuit …10 kΩ
Measured current 0.8 mA at RE = kΩ, 0.33 mA at RE = 10 kΩ
Measured voltage 3.3 V
Supply/output
2-wire …20 mA
Voltage 11...28 VDC
Burden/load 0....800 Ω ( RBurden max = [(Um – Um min) / 0,02] Ω )
Output signal if fault is detected Max. 2 mA
Environment
Operating temperature -20...+60 °C
Storage temperature - 0...+80 °C
In luence o errors
Max. accumulated errors ± 1%
Influence of temperature -0.015% / °C
Effect of variation of supply voltage 0.025% / V
O set (optional)
Full-scale amplitude Approx. 60...105 %
Zero-offset elevation Approx. 0…25 %
EMC standards
See conformity declaration
Characteristic labeling
See EC-type examination certificate TÜV 02 ATEX 1795 X respectively IECEx TUN 17.0036X
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