Tecfluid LU Series Manual do Utilizador

Instructions Manual R-MI-LU Rev.: 0 English version Ultrasonic level transmitter Series LU

10 3.2 Power supply and analog output connection (models LU92X) Models LU92X (LU921, LU923, LU921H) are 2-wire instruments. The connection is made i

11 3.4 Connection examples The two usual ways to connect the alarm outputs are NPN or PNP modes, depending on if the load is connected to the positi

12 Once the instrument has been installed, the echo intensity can be verified. This intensity depends on the distance to the target, the type of prod

13 4.3 Dead zone indication If the measured distance is shorter than the minimum measuring distance, we can say that the product is in the dead zone

14 5 CONFIGURATION To change a digit, touching the key () the flashing digit will be incremented. When the value of 9 is reached on the next increme

15 The percentage of filling is calculated taking into account the points distance to the bottom (see section 5.2) and distance to the top, according

16 The remaining screens will require the parameters in the chosen mode. 5.5 Current output Next, the loop current programming screens are displayed

17 5.6 Alarms In these screens we select the actuation points of the two alarms and the level of hysteresis. By level of hysteresis we understand the

18 If an activation point of 0.9 m and a deactivation point of 1 m is programmed, when the level is zero the output will be on. When the level reache

19 5.8 Dead zone distance In some installations it can be useful to increase the dead zone value. For example, in cases of standpipe measurements. O

2 TABLE OF CONTENTS 1 INTRODUCTION ... 4 2 INSTALLATION ...

20 5.12 Serial number and software version Touching the three keys at the same time we access a screen where the serial number of the converter is s

21 7 HART COMMUNICATION Level meters LU9XH y LU921H have a modem for HART communication. LU transmitters are fully compatible with the HART Server so

22 8 MAINTENANCE No special maintenance is required . For cleaning, a humid cloth can be used, and if necessary with a little soap. Solvents or other

23 9 TECHNICAL CHARACTERISTICS 9.1 Materials Body: PP, PVDF Housing: Polycarbonate. 9.2 Process connection LU91 / LU921: G2 (BSP) thread. LU93 /

24 10 DIMENSIONS LU91 LU921 LU93 LU923

25 11 TROUBLESHOOTING Problem Probable cause Remedy Dashes on the display The product is in “dead zone”. The distance between the level transmitte

26 12 CONFIGURATION DIAGRAM SN: Serial number dA: Damping dL: Dead zone distance dead: Dead zone alarm Hi: Hysteresis. Window in which the instrum

27 A1A: Value at which the alarm 1 will activate A1d: Value at which the alarm 1 will deactivate A2A: Value at which the alarm 2 will activate A2d

28 WARRANTY Tecfluid S.A. guarantees all the products for a period of 24 months from their sale, against all faulty materials, manufacturing or perfo

3 5.9 Dead zone alarm ... 19 5.10 Hysteresis ...

4 1 INTRODUCTION The series LU transmitters are electronic equipment based on the transmission of ultrasonic waves to measure the distance to a liqui

5 It is not desirable that the product reaches the instrument, because build-up can form on the transducer, that would affect the measurement. 2.3 O

6 2.4 Filling entries It is not recommended to install the level meter in the upper zone of a filling entry, because the instrument could detect the

7 The power supply is provided by a diode bridge that allows connecting it regardless of the polarity . 3.1.2 Analog output connection Terminal +

8 The analog output can be either active (default configuration), that means that the receptor must be passive, or passive, what means the receptor m

9 mA: Ammeter Possibilities of connection for the power supply and analog output