NIVELCO EchoTREK S-300 Installation And Programming Manual

Also see for EchoTREK S-300: User and programming manual User manual

NIVELCO EchoTREK S-300 Installation And Programming Manual Manual pdf 13 page image

BKI16ATEX0020X ♦ sbd31j0a0600p_03♦ 13 / 485. PUTTING INTO OPERATION, ADJUSTING, PROGRAMMING5.1. PUTTING INTO OPERATION, USAGEAfter switching on the correctly wired unit the transducer begins to click audibly. In about 20 … 50 s the ECHO LED goes on and a signal between 4 – 20 mAappears on the current output. The factory default settings are suitable for checking the operation of the unit or solving most simple level metering tasks. Forusing the advanced features of the EchoTREK it is required to modify the programming to customize it for the required measurement task. To get familiar withthe programmable features of the level transmitter and be able to solve challenging level measurement tasks it is strongly recommended reading carefully thefollowing chapters of this user's and programming manual.FACTORY DEFAULT PARAMETERSAll the transducers get the same factory default parameters that can also be reset later if needed. Some of the most important parameters default values of theEchoTREK SD-3 series can be found below:⇒ Measurement mode: level measurement (LEV). The plug-in SAP-100 display shows level value.⇒ Zero level is assigned to the maximum measuring distance (XM).⇒ The output current and the bargraph of the SAP-100 module is assigned to the measured level value.⇒ 4 mA and 0% is assigned to zero level (maximum measuring distance).⇒ 20 mA and 100% is assigned to maximum level (minimum measuring distance).⇒ Current output in case of error: holding the last measurement value.⇒ Damping time: 300 s.⇒ Relay is de-energized in case of „NO Echo”.All the other measurement values are set to fit the values suitable for standard tasks. The functions used in special cases are switched off by default.AIMING OF THE ECHOTREK FOR SOLIDSTo reduce week signal reflection from the material surface caused by an angle of repose building due to the filling and/or emptying process, it is recommendedto tilt the sensor by the aiming arm of the transmitter. The optimal tilting position can be adjusted during operation and recommended to be checked at multiplelevels during the filling / emptying process. In most cases, the sensor should be aimed towards the middle of the tank/silo bottom by aiming at the silo outlet.In applications where repose is not present or with tall and narrow silos (diameter/height ≥ 5) aiming is notcritical: the sensor should face straight downwards. Aiming should also be tested also with full silo, sincedue to the great angle of repose the echo might be weak despite of the fact that level is near to the sensor.In such cases a reasonable compromise of aiming should be achieved that provide acceptable echo inevery state of the filling. Aiming is also aided by the informational parameters P70 – P75. Aiming procedureis recommended to perform together with the full parameter access programming.