3B.4 COMPONENT REPLACEMENT, 3b-17 | Emerson 2468CD, 2468CB instruction

3B.4 COMPONENT REPLACEMENT

Hydrastep 2468CB and 2468CD Manual

Delay Relay Output Board Option

3B.4 COMPONENT REPLACEMENT

The delay relay board contains no replaceable circuit components, failure of the board requires replacement of the entire board. The only component that can be replaced is the nylon spacers.

3B.4.1 REPLACEMENT OF NYLON SPACERS

WARNING Mains voltages are present in this instrument when power is connected. De-energise before opening front cover.

The replacement of nylon spacers fitted to the output board requires access to the non- component side of the PCB.

Note: Spacers will only be fitted on the output board if a second output board is to be fitted or has been fitted.

The spacers are secured in their holes by nut and nylon washer. To carry out a spacer replacement, the output board has to be removed from the input board. The procedure adopted is:

1.Isolate the 2468 electronic enclosure from the power supply.

2.Gain access to the PCBs and undo sufficient connections for the removal of the output board containing the defective spacer.

3.Remove the output board(s) by applying pressure

to the upper spring-loaded spigots and easing the output board off its spacers a out of its Berg plug/socket connection.

4.Undo the nut and washer securing the faulty

spacer and extract it from its hole, see inset diagram.

5. Fit the new spacer in position, align correctly on the board and secure firmly using the M4 nut and nylon washer.

6.Refit the PCB(s) into the enclosure, re-connect

the PCB(s) as required and close the enclosure cover. Re-apply power if required.

3B.4.2 PARTS LIST - DELAY RELAY OUTPUT BOARD 24680509

The following list items are available as spare parts:

	Item Description	Mobrey Part	Item Description	Mobrey Part
	Item Description	Number	Item Description	Number
		Number		Number
	Electrical:		Mechanical:
	Delay relay PCB assembly:	24680509B	Spacer, nylon 15.9 LG	412012080
	Socket 5K2 free (8-way)	351508100	Washer, nylon	411999910
	Socket 5K2 free (8-way)	351508100	Nut, M4	410031020
	Socket 5K3 free (8-way)	351503100	Nut, M4	410031020
	Socket 5K3 free (8-way)	351503100

24685034

3b-17

Image 101

Emerson 2468CD, 2468CB manual 3B.4 COMPONENT REPLACEMENT, 3b-17

Contents

Hydrastep Hydrastep 2468CB and 2468CDElectronic Gauging System Dual Power Supply Version SOLUTION See Note SYMPTOMCATEGORY POSSIBLE CAUSES See Note Mobrey Customer Support HYDRASTEP START-UP Part 1 – Electrical/Electronic System About this manualPart 2 – Pressure Parts Part 3 – Appendix Symbol Meaning SYMBOLS USED IN THIS MANUAL AND ON THE UNITPage Hydrastep 2468CB & 2468CD PartElectronic Gauging System 24685034 Pt.1-2 DANGEROUS VOLTAGES ARE PRESENT IN Pt.1-4 Part Contents Pt.1-6 Illustrations ContentsPage No Tables 0040 1.1WATER LEVEL MEASUREMENT 24685034 1.2.2DISPLAY BOARD 1.2HYDRASTEP 2468 ELECTRONIC GAUGING SYSTEM1.2.1INPUT BOARDS 1.2.3SYSTEM FAULTS 2468CB OR 2468CD 1.3SYSTEM OPTIONS1.3.1OUTPUT BOARDS 1.3.2REMOTE DISPLAY UNITS Existing System Table 1.1 - Upgrade paths and available optionsAvailable Options Comments 24685034 2468CB & 2468CD Dual Power Supply Version SPECIFICATION FAULT ANALYSIS & CORRECTIVE ACTION2-23 2-32 2.2ELECTRODE CABLING SYSTEM 2.1INTRODUCTION2.3ELECTRONIC ENCLOSURE Number of 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 No. of Electrodes used 2.3.3.2Links LK2, LK3, LK4 and LK5Link Headers fitted 2.3.4PCB INTERCONNECTIONS 2.4INSTALLATION 24685034 Electrode connections 2-10 Water column connections for 16 electrodes 2-11Conductor Number 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 2.5.1.1Analogue Output Configuration 2.5SYSTEM CONFIGURATION2-17 2.5.1INPUT BOARD PCB 24680501 OR 2.5.1.3Electrode Error Configuration 2.5.1.2Pulsed Output Setting2-18 Input Board Option Board Removed Offset voltages 2-19 2-20 2.5.2.1Link LK1 Setting2.5.2DISPLAY BOARD Table 2.2 - Number of electrodes being displayed 2-21 2-22 2.5.2.3‘Switching Threshold’ Setting2.5.2.4 ‘Compatibility’ Setting 2-23 2.6FAULT ANALYSIS & CORRECTIVE ACTION 2-24 FaultsIndication Analysis and Corrective Action 2-25 2-26 Bottom half of 2-27alternates alternating between water and steam green and Bottom half of 2-28State 5 contd 2-29 2-30 2.6.1COMPONENT REPLACEMENT2.6.1.1Removing the Input Board 24680501 or 2.6.1.2Refitting the Input Board 2-31 2.6.2PARTS LIST - HYDRASTEP 2468 CB & CD VERSIONSItem Description Mobrey 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-5 3A.2.3 ELECTRICAL INSTALLATION3a.2.3.1 PCB Interconnections 3a.2.3.2 Relay Output Connections 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-5 3B.2.3 ELECTRICAL INSTALLATION3b.2.3.1 PCB Interconnections 3b.2.3.2 Relay Output Connections 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 Service 4.4.4CONNECTING CABLES TO THE REMOTE DISPLAY4-11 Terminal 4-12 4.4.5CONNECTING THE DISPLAY CABLES TO HYDRASTEP 4.5SYSTEM OPERATION 4.6FAULT ANALYSIS AND CORRECTIVE ACTIONFault 4-13 4-14 Bottom half of fault Flickering Display 4-15 4-16 4.7COMPONENT REPLACEMENTItem Mobrey Part Number DIMENSIONS 4.8SPECIFICATIONPOWER SUPPLY REMOTE DISPLAY UNITS 4-18 Operating Manual Hydrastep Pressure Parts 24675030 Pt.2-2 Pt.2-3 Part 2 - Pressure Parts Pt.2-4 ELECTRODE INSTALLATION R E M I N D E RCORRECT INCORRECT Pt.2-6 Pt.2-7 N O T I C E Pt.2-8 Installation Procedures Part 2 - Hydrastep Pressure PartsUnit Specifications - Hydrastep Fault Repair and Commissioning Pt.2-10 PRINCIPLE OF OPERATION General IntroductionWATER LEVEL INDICATION 24675030 Hydrastep Pressure Parts 24675030 1.2WATER LEVEL INDICATION 1.1PRINCIPLE OF OPERATION 24675030 General Introduction Hydrastep Pressure Parts SCOPE OF PROCEDURES Installation ProceduresINSTALLATION OF WATER COLUMN STORAGE Installation Procedures 2.3INSTALLATION OF WATER COLUMN 2.1SCOPE OF PROCEDURES2.2STORAGE 2.2.4HANDLING PRECAUTIONS 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 Hydrastep 2468CA, CB, CC & CD PartElectronic Gauging System Pt.3-1 Pt3-2 A.1 GENERAL CSA Certified Hydrastep 2468 - Technical Manual Page Appendix A CSA Approval Page Operating Manual Hydrastep