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Weighing System Surge protector
Weighing System Surge protector
User Manual
User Manual
SP151
© Excell Precision Limited 2012. All rights reserved Worldwide.
The information contained herein is the property of Excell Precision Limited
and is supplied without liability for errors or omissions. No part may be
reproduced or used except as authorised by contract or other written
permission. The copyright and the foregoing restriction on re
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EXCELL PRECISION CO., LTD SP151 Weighing System Surge Protector The high performance surge protector device applies to 4- or 6-wire load cell weighing systems or other related applications. 1. General SP151 Surge Protector is designed for accessing direct into the cabling of the weighing system, in order to prevent the load cells and other sensitive electronic components from damage by a near surge strike or power failure. Surge protector works at the local only, therefore, SP151 d
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EXCELL PRECISION CO., LTD Load Load Cell Cell Juction Box Load Load SP151 Cell Cell Connection to weight cabin Local Structural earth bond Figure 1 Load Load SP151 SP151 Cell Cell Load Load SP151 SP151 Cell Cell Figure 2 2 ZSME000000016
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EXCELL PRECISION CO., LTD 2.2 Securing ◄ SP151 should be mounted vertically, and the cable should be connected upside down to avoid water from seepage. 3 ZSME000000016
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EXCELL PRECISION CO., LTD ▼ SP151 sealing ring has 4 mounting holes with center to center spacing of 113.5 × 113.5 mm. Using M4x16 or M4x20 round head screw to secure the Surge Protector box onto the mounting surface. Using M4x16 or M4x20 round head screw to secure the Surge Protector box onto the mounting surface. 4 ZSME000000016
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EXCELL PRECISION CO., LTD Lock attached to the screw size The screw diameter is 4mm, and 7mm for the head diameter (M4 screws minimum length is 16mm). The stainless steel screws are recommended to use for securing purpose. Cables within 200mm from SP151 should be supported and fixed to prevent the cable connector from unable to support the weight of the cable. 5 ZSME000000016
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EXCELL PRECISION CO., LTD 2.3 Grounding Properly grounding can only elaborate the performance of a surge protector. To select the welding point by referring to the local voltage, all the welding points will share the common-mode voltage to the ground. The welding point is connected to the local ground network or ground rod system; hence, no extra ground network or ground rod system is needed to be installed. Proper grounding is the local structure of the device (Figure 1 and Figure 2
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EXCELL PRECISION CO., LTD 2.4 Connections Two terminals are provided, labeled "Field cable” and “Instrument cable”. Field cable is the independent, exposed cable between the weighbridge and weighing cabin. Instrument or load cell cable is a locally short connection, such as from SP151 to the junction box, independent load cell or weighing scale. Equipments connected to the terminal are subject to SP151 protection. SP151 allows the 4-wire (SIG1, SIG2, EXC1, EXC2) or line 6 (SIG1, SIG2,
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EXCELL PRECISION CO., LTD 3. Maintenance Note: For certified systems, you must confirm that the system can be re-calibrated. Before tearing off the seal for maintenance, a new calibration seal is required for replacing after the maintenance. Processing the maintenance every the other year. (higher repair and maintenance frequency for particularly harsh environments) 3.1 Check SP151 to see if it is surrounded by intact and sealed correctly. 3.2 Remove the chassis cover and confirm th
