2.1INTRODUCTION, 2.2ELECTRODE CABLING SYSTEM | Emerson 2468CD

Hydrastep 2468CB and 2468CD Manual

2468CB & 2468CD Dual Power Supply Version

2.1INTRODUCTION

This chapter introduces the dual power supply version of the Hydrastep 2468 Electronic Gauging System, its mechanical installation, system configuration, simple fault analysis/corrective action capability and its specification.

2.2ELECTRODE CABLING SYSTEM

This system can have 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 or 32 electrodes and uses 18-core electrode cables. The cables consist of nine pairs of coloured cores with the black cores in each cable used for the EARTH terminations. Each electrode requires one pair of cores, one core for the signal drive and one for the signal return.

Number of	Number of Cables
Electrodes	Required

8	1
10-16	2
18-24	3 or 4
26-32	4

The electrode cable is pre-formed for simple installation. The connections to the electrodes are terminated on the connection stud of the electrode. Either core can be connected to the electronic enclosure as the signal drive or return.

2.3ELECTRONIC ENCLOSURE

The basic arrangement of boards in the electronic enclosure is as follows:

∙Two input boards supply power to the system and to the input signal processing circuits. These boards are: PCB 24680501, ac (mains) input, or PCB 24680516, dc input. One board is mounted on the right hand side of the base plate and receives the odd numbered electrode inputs. The other board is mounted on the left hand side of the base plate and receives the even numbered electrode inputs.

∙A display board (PCB 24680515) contains the LED drive circuits for the two columns (32 red LEDs and 32 green LEDs) and the system fault LEDs. This board is mounted on the rear of the front panel, with the LEDs protruding through the front panel.

∙Up to four output boards, Relay Board (PCB 24680504), Relay with time delay Board (24680509) or Opto-isolator Board (PCB 24680505) may be fitted, two per input board. Output board mounting pillars are fitted to each input board during manufacture to support the first output board mounted.

Refer to Figure 2.1 on page 2-4 for an annotated view of the internal layout of the unit.

24685034

2-3

Image 23

Emerson 2468CD 2.1INTRODUCTION, 2.2ELECTRODE CABLING SYSTEM, 2.3ELECTRONIC ENCLOSURE, Number of Cables, Electrodes

Contents

Dual Power Supply Version Hydrastep 2468CB and 2468CDHydrastep Electronic Gauging System POSSIBLE CAUSES See Note SYMPTOMSOLUTION See Note CATEGORY Mobrey Customer Support HYDRASTEP START-UP Part 3 – Appendix About this manualPart 1 – Electrical/Electronic System Part 2 – Pressure Parts Symbol Meaning SYMBOLS USED IN THIS MANUAL AND ON THE UNITPage 24685034 PartHydrastep 2468CB & 2468CD Electronic Gauging System Pt.1-2 DANGEROUS VOLTAGES ARE PRESENT IN Pt.1-4 Part Contents Pt.1-6 Tables ContentsIllustrations Page No 0040 1.1WATER LEVEL MEASUREMENT 24685034 1.2.2DISPLAY BOARD 1.2HYDRASTEP 2468 ELECTRONIC GAUGING SYSTEM1.2.1INPUT BOARDS 1.3.2REMOTE DISPLAY UNITS 1.3SYSTEM OPTIONS1.2.3SYSTEM FAULTS 2468CB OR 2468CD 1.3.1OUTPUT BOARDS Comments Table 1.1 - Upgrade paths and available optionsExisting System Available Options 24685034 2468CB & 2468CD Dual Power Supply Version 2-32 FAULT ANALYSIS & CORRECTIVE ACTIONSPECIFICATION 2-23 Number of 2.1INTRODUCTION2.2ELECTRODE CABLING SYSTEM 2.3ELECTRONIC ENCLOSURE 2468CB & 2468CD Dual Power Supply Version 2.3.2REMOTE DISPLAY DRIVE CAPABILITY 2.3.1INPUT BOARD PCB 24680501 AND PCB2.3.1.1Analogue Output Drive Capability 2.3.3.1Link LK1 2.3.3DISPLAY BOARD PCB 2.3.4PCB INTERCONNECTIONS 2.3.3.2Links LK2, LK3, LK4 and LK5No. of Electrodes used Link Headers fitted 2.4INSTALLATION 24685034 Electrode connections 2-10 Number 2-11Water column connections for 16 electrodes Conductor 2-12 2.4.2.3Connecting the Electrode Cable Assemblies to 2468 Enclosure 2-13 AC Powered Units input board2.4.2.4Hydrastep Power Supply Cables Figure 2.4 Voltage Selection 240V or DC Powered Units input board2-14 2.4.2.5Analogue Output Connection 2-15 Part of Display Board showing PL4 2.4.2.6Opto-IsolatedFault Output Connection2-16 2.5.1INPUT BOARD PCB 24680501 OR 2.5SYSTEM CONFIGURATION2.5.1.1Analogue Output Configuration 2-17 Input Board Option Board Removed 2.5.1.2Pulsed Output Setting2.5.1.3Electrode Error Configuration 2-18 Offset voltages 2-19 Table 2.2 - Number of electrodes being displayed 2.5.2.1Link LK1 Setting2-20 2.5.2DISPLAY BOARD 2-21 2-22 2.5.2.3‘Switching Threshold’ Setting2.5.2.4 ‘Compatibility’ Setting 2-23 2.6FAULT ANALYSIS & CORRECTIVE ACTION Analysis and Corrective Action Faults2-24 Indication 2-25 2-26 alternating between water and steam green and 2-27Bottom half of alternates Bottom half of 2-28State 5 contd 2-29 2.6.1.2Refitting the Input Board 2.6.1COMPONENT REPLACEMENT2-30 2.6.1.1Removing the Input Board 24680501 or Mobrey 2.6.2PARTS LIST - HYDRASTEP 2468 CB & CD VERSIONS2-31 Item Description 2-32 SPECIFICATION Page No Wiring Diagrams for Dual Power Supply Version2-WD.1 2-WD.2 Wiring Diagrams for Dual Power Supply Version 2-WD.3 Wiring Diagrams for Dual Power Supply Version 2-WD.4 2-WD.5 2-WD.6 2-WD.7 2-WD.8 2-WD.9 Hydrastep 2468CB and 2468CD Manual 2-WD.10 2-WD.11 2-WD.12 2-WD.13 2-WD.14 2-WD.15 2-WD.16 3a-1 2468 - Relay Output Board Option 3a-7 3a-2 3a-3 3A.2 INSTALLATION3A.1 GENERAL DESCRIPTION 3a-4 3a.2.3.2 Relay Output Connections 3A.2.3 ELECTRICAL INSTALLATION3a-5 3a.2.3.1 PCB Interconnections 3a-6 3A.3 RELAY BOARD CONFIGURATION 3A.3.1 RELAY OUTPUT BOARD 3a.3.1.1 Configuring the Relay Output Board3a-7 3a-8 3a.3.2.1 Philosophy 3A.3.2 ALARM AND TRIPPING FACILITIES3a-9 3a-10 3a-11 3a-12 3a-13 3a-14 3a-15 3A.4 COMPONENT REPLACEMENT 3a-16 3A.5 SPECIFICATION 3b-1 Delay Relay Output Board Option 3B.5 SPECIFICATION3b-2 3b-3 3B.2 INSTALLATION3B.1 GENERAL DESCRIPTION 3b-4 3b.2.3.2 Relay Output Connections 3B.2.3 ELECTRICAL INSTALLATION3b-5 3b.2.3.1 PCB Interconnections 3b-6 3B.3 DELAY RELAY BOARD CONFIGURATION 3B.3.1 DELAY RELAY OUTPUT BOARD 3b.3.1.1 Configuring the Delay Relay Output Board3b-7 3b-8 3b-9 3b.3.1.6 Delay Circuit Configuration 3b-10 3b.3.1.7 Configuring the Delay Circuit Split Pads 3b.3.2.1 Philosophy 3b-11 3b-12 3b-13 3b-14 3b-15 3b-16 3b-17 3B.4 COMPONENT REPLACEMENT 3b-18 3B.5 SPECIFICATION 2468 Opto-isolatedOutput Board Option 3c-2 IllustrationsTables 3c-3 3C.2 INSTALLATION3C.1 GENERAL DESCRIPTION 3c-4 3c.2.3.2 Opto-IsolatedOutput Connections 3c-5 3c-6 3C.3 OPTO-ISOLATEDOUTPUT BOARD CONFIGURATION 3c-7 3c-8 3c.3.2.1 Philosophy 3C.3.2 ALARM AND TRIPPING FACILITIES3c-9 3c-10 3c-11 3c-12 3c-13 3c-14 3C.4 COMPONENT REPLACEMENT 3c-15 3C.5 SPECIFICATION 3c-16 Remote Display Options 24683B, C, & D Figure 4.1REMOTE DISPLAY OPTIONS 4.2CONFIGURATION 4.2.2RECONFIGURING THE 24683D REMOTE DISPLAY 4.3.2INSTALLING THE 24683D WALL MOUNTED UNIT 4.3MECHANICAL INSTALLATION comply with the EMC directive 4.4ELECTRICAL INSTALLATION Daisy Chain 4.4.1STAR AND DAISY CHAIN CONNECTIONSStar 4.4.2EXAMPLE OF A ‘STAR CONNECTED’ SYSTEM 4-10 4.4.3EXAMPLE OF A `DAISY CHAIN SYSTEM Terminal 4.4.4CONNECTING CABLES TO THE REMOTE DISPLAYService 4-11 4-12 4.4.5CONNECTING THE DISPLAY CABLES TO HYDRASTEP 4-13 4.6FAULT ANALYSIS AND CORRECTIVE ACTION4.5SYSTEM OPERATION Fault 4-14 Bottom half of fault Flickering Display 4-15 Mobrey Part Number 4.7COMPONENT REPLACEMENT4-16 Item REMOTE DISPLAY UNITS 4.8SPECIFICATIONDIMENSIONS POWER SUPPLY 4-18 Operating Manual Hydrastep Pressure Parts 24675030 Pt.2-2 Pt.2-3 Part 2 - Pressure Parts Pt.2-4 INCORRECT R E M I N D E RELECTRODE INSTALLATION CORRECT Pt.2-6 Pt.2-7 N O T I C E Pt.2-8 Fault Repair and Commissioning Part 2 - Hydrastep Pressure PartsInstallation Procedures Unit Specifications - Hydrastep Pt.2-10 24675030 General IntroductionPRINCIPLE OF OPERATION WATER LEVEL INDICATION Hydrastep Pressure Parts 24675030 1.2WATER LEVEL INDICATION 1.1PRINCIPLE OF OPERATION 24675030 General Introduction Hydrastep Pressure Parts STORAGE Installation ProceduresSCOPE OF PROCEDURES INSTALLATION OF WATER COLUMN Installation Procedures 2.2.4HANDLING PRECAUTIONS 2.1SCOPE OF PROCEDURES2.3INSTALLATION OF WATER COLUMN 2.2STORAGE discarded Figure 2.1 - Universal weld profile 2.4INSPECTION OF MECHANICAL INSTALLATION WORK 24675030 Figure 2.3 - Typical water column suspension WATER COLUMN COMMISSIONING OR RECOMMISSIONING Fault Repair and CommissioningBACKGROUND Hydrastep Pressure Parts 3.1.1SAFETY PRECAUTIONS 3.1BACKGROUND 3.1.3.1Low Pressure Electrodes 3.1.2WATER COLUMN ISOLATION3.1.3ELECTRODE AND ELECTRODE SEAL LEAKS 3.1.3.2High Pressure Electrodes 3.2.1VENT AND DRAIN VALVE REPAIRS 3.2WATER COLUMN COMMISSIONING OR RECOMMISSIONING 3.2.4WATER COLUMN LIFE 3.2.2WATER COLUMN TRANSIENT RESPONSE3.2.3WATER COLUMN OR PIPEWORK BLOCKAGE Hydrastep Pressure Parts Unit Description Unit Description Figure 4.1 - Low pressure electrode 4.1LOW PRESSURE ELECTRODES Figure 4.2 - High pressure electrode 4.2HIGH PRESSURE ELECTRODES 4.3WATER COLUMN L.P 4.4WATER COLUMN H.P 4.5WATER COLUMN H.P. SUPERCRITICAL 24675030 5.1ELECTRODES Unit Specifications - Hydrastep Super 5.2WATER COLUMNSSeries Pt.3-1 PartHydrastep 2468CA, CB, CC & CD Electronic Gauging System Pt3-2 A.1 GENERAL CSA Certified Hydrastep 2468 - Technical Manual Page Appendix A CSA Approval Page Operating Manual Hydrastep