UM 2.1/2.2/2.3
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Technical Documentation UM 2.1/UM 2.2/UM 2.3 Measurement evaluation units

© Copyright: Reproduction and translation only with the written consent of the company FAFNIR. FAFNIR reserves the right to carry out product alterations without prior notice. Measurement evaluation units UM 2.1/UM 2.2/UM 2.3

Measurement evaluation units UM 2.1/UM 2.2/UM 2.3

Characteristic features of the measurement evaluation units UM 2.1, UM 2.2 and UM 2.3 The measurement evaluation units UM 2.1, UM 2.2 and UM 2.3 U / UM 2.3 I are used for evaluating and displaying levels of liquids in tanks. The levels measured and transferred to the measurement evaluation units are processed in such a way that they can either be read off a display on the measurement evaluation units or have an electrical output: • UM 2.1 indicates the level in the form of a bar display and outputs two freely definable limit values via changeover contacts. • UM 2.2 provides an output of...

The measurement evaluation units UM 2.1, UM 2.2, UM 2.3 U, or UM2.3 l serve the purpose of measuring and evaluating the filling levels in tanks. Use the system for this purpose only. The manufacturer shall not be liable for any form of damage resulting from improper use! The measurement evaluation units were developed, manufactured and inspected in accordance with state-of-the-art technology and with recognised technical safety rules and regulations. Nevertheless, hazards may arise from the use of these devices. Therefore, observe the following safety instructions. Do not change or modify...

Structure and mode of operation Measurement evaluation units UM 2.1, UM 2.2 and UM 2.3 U/ UM 2.3 I contain the power supply and signal evaluation for the connected level sensor. Measurement evaluation unit UM 2.1 Measurement evaluation unit UM 2.1 has a light-strip indicator with 5% increments for displaying the levels in the tank (1). With the Test button (4) and three potentiometers (5) at the bottom of the measurement evaluation unit two limit values can be set. The operating state of the measurement evaluation unit is indicated by three LEDs (LEDs). The green LED „Operation“ (3) is lit...

Measurement evaluation unit UM 2.2 Measurement evaluation unit UM 2.2 provides an output of 0/4–20 mA and an output of 0–10 V proportional to filling level. The green LED „Operation“ (1) is lit when the UM 2.2 is connected to the power supply and is ready for operation. 1 Hersteller: FAFNIR GmbH Hamburg Hilfsenergie: 230 V Ausgang: 0(4)–20mA max. 500 Ω Fig. 1b: Measurement evaluation unit UM 2.2 Measurement evaluation units UM 2.1/UM 2.2

Measurement evaluation units UM 2.3 U and UM 2.3 I Measurement evaluation units UM 2.3 and UM 2.3 I have a 4-digit numeric display for indication the levels in the tank (1). With the aid of the plus (2) and ok buttons (7) at the top of the measurement evaluation unit the unit can be configured and matched to respective tank data. With the Test button (5) and three potentiometers (6) at the bottom of the measurement evaluation unit two limit values can be set. The operating state of the measurement evaluation unit is indicated by three LEDs (LEDs). The green LED „Power“ (4) is lit when the...

Installation The measurement evaluation units are integrated into a plastic housing with IP 40 protection and must be installed in a weatherproof location. The permissible ambient temperature is between -20 °C and +40 °C. Carry out the wiring work only when the unit is in its deenergised state. Switch off the 230 V power supply system before opening the measurement evaluation unit. The power supply system is only allowed to be switched on only when the measurement evaluation unit has been firmly screwed together. For any work being carried out on the measurement evaluation unit, the...

2. Connect up measurement evaluation unit in accordance with Figs. 2a, 2b, 2c and 2d. N - Output 0–10V RLoad ≥ 10 kOhm Connecting cable Filling level sensor – UM 2.1 4 x 0,5 mm2, shielded Filling level sensor Fig. 2a: Connection of the measurement evaluation unit UM 2.1 L1 (-) not galvanically separated from 3 and 4 + Output 0 V bis 10 V - RLoad ≥ 10 kOhm not galvanically separated from 3 and 4 Connecting cable Filling level sensor – UM 2.2 4 x 0.5 mm2, shielded Filling level sensor Fig. 2b: Connection of the measurement evaluation unit UM 2.2 Measurement evaluation units UM 2.1/

- Output 0–10V + R Load ≥ 10 kOhm Connecting cable Filling level sensor – UM 2.3 U 4 x 0.5 mm2, shielded Filling level sensor Fig. 2c: Connection of the measurement evaluation unit UM 2.3 U N Connecting cable Filling level sensor – UM 2.3 I 2 x 0.5 mm2 Filling level sensor Fig. 2d: Connection of the measurement evaluation unit UM 2.3 I Measurement evaluation units UM 2.1/UM 2

3. Replace the housing and screw it on. 4. Finally turn on the power supply. The green LED „Operation“ and „Power“ are lit. Hersteller: FAFNIR GmbH Hamburg Hersteller: FAFNIR GmbH Hamburg Hilfsenergie: 230 V Ausgang: 0(4)–20mA max. 500 W Betrieb Test Power Test FAFNIR GmbH Hamburg Measurement evaluation unit UM 2.2 is now ready for operation. Measurement evaluation unit UM 2.3 still has to be configured and matched to the respective tank data. Finally, the two limit values are set on measurement evaluation units UM 2.1 and UM 2.3. Measurement evaluation unit UM 2.1 Setting limit values To...

and switches off again when the filling height is exceeded with a value of 23 %. Messauswertung Typ UM 2.1 Hersteller: FAFNIR GmbH Hamburg Fig. 3: Measurement evaluation unit UM 2.1 Measurement evaluation units UM 2.3 U and UM 2.3 I Configuring measurement evaluation units When the measurement evaluation unit has been connected up to the level sensor and the power supply, it has to be configured for correct indication of the level of liquid and hence for the respective tank data. The following parameters are configured in this order: 1. Decimal point (on the display) 2. Decimal point (on...