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Operating Manual
24685034, Rev. AE
June 2011
Hydrastep 2468
Hydrastep 2468CB and 2468CD
Electronic Gauging System
(Dual Power Supply Version)
www.mobrey.com
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CATEGORY SYMPTOM POSSIBLE CAUSES (See Note 1) SOLUTION (See Note 2) PSU (AC) Hydrastep system does not power-up. Wrong voltage setting. Refer to Part 1, Section 2.4.2.4. Incorrect supply. Blown fuse. Incorrect cable termination. PSU (DC) Hydrastep system does not power-up. Incorrect supply. Refer to Part 1, Section 2.4.2.4. Blown fuse. Incorrect cable termination. MAIN DISPLAY Chequered / intermittent display. Incorrect configuration.
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HYDRASTEP START-UP It is possible that some of these conditions will be seen on a new Hydrastep installation. ** This does not mean that the equipment you have purchased is faulty ** Due to the nature of the areas that Hydrastep is normally installed, various conditions can occur that make the instrument operate in an unusual manner. It would be easy to think you have installed defective equipment, but it is very unlikely that this is the case. Great care must be taken when installing
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About this manual This manual describes the Hydrastep 2468CB and 2468CD Electronic Gauging Systems along with the recommended options. Except where stated otherwise, the information contained in this manual can be assumed to apply to either system. This manual is divided into three parts; the first covers the electrical/electronic system; the second describes the pressure parts; the third is for coverage of all other aspects. Part 1 – Electrical/Electronic System Chapter 1 introdu
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SYMBOLS USED IN THIS MANUAL AND ON THE UNIT Symbol Meaning Direct Current Alternating Current Earth (ground) terminal Protective conductor terminal Caution (refer to accompanying documents)
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Part 1 Hydrastep 2468CB & 2468CD Electronic Gauging System 24685034 Pt.1-1
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Pt.1-2 24685034
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DANGEROUS VOLTAGES ARE PRESENT IN THIS EQUIPMENT. ANY WARNING NOTICES OR PROCEDURES CONTAINED IN THIS MANUAL OR ON THE EQUIPMENT SHOULD BE STRICTLY OBSERVED TO MAINTAIN SAFETY. THE USE OF THIS EQUIPMENT IN A MANNER NOT SPECIFIED IN THIS MANUAL MAY IMPAIR THE PROTECTION PROVIDED BY THIS EQUIPMENT. GREAT CARE SHOULD BE EXERCISED WHEN SERVICING THIS EQUIPMENT. TO ENSURE COMPLIANCE WITH THE EMC DIRECTIVE (WHERE APPLICABLE) THE INSTRUCTIONS ON CABLE SCREENING, ROUTING AN
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Pt.1-4 24685034
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Part 1 Contents Chapter 1 Introduction to the Hydrastep 2468 Electronic Gauging System Chapter 2 2468CB & 2468CD Dual Power Supply Version Chapter 3a 2468 - Relay Output Board Option Chapter 3b Delay Relay Output Board Option Chapter 3c 2468 Opto-isolated Output Board Option Chapter 4 Remote Display Options 24683B C & D 24685034 Pt.1-5
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Pt.1-6 24685034
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Hydrastep 2468CB and 2468CD Manual Introduction to the Hydrastep 2468 Electronic Gauging System 1 Introduction to the Hydrastep 2468 Electronic Gauging System Contents Page No. 1.1 WATER LEVEL MEASUREMENT .......................................................... 3 1.2 HYDRASTEP 2468 ELECTRONIC GAUGING SYSTEM ....................... 5 1.2.1 INPUT BOARDS .................................................................................. 5 1.2.2 DISPLAY BOARDS .........................
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Introduction to the Hydrastep 2468 Electronic Gauging System Hydrastep 2468CB and 2468CD Manual 0040 Figure 1.1 - Front panel of the Hydrastep 2468 gauging system 1-2 24685034
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Hydrastep 2468CB and 2468CD Manual Introduction to the Hydrastep 2468 Electronic Gauging System 1.1 WATER LEVEL MEASUREMENT The Hydrastep 2468 Electronic Gauging System is designed as an electronic alternative to water level gauges on boilers, giving a more reliable and safer water level indication than conventional visual gauges. It uses the significant difference in resistivities of water and steam in temperatures up to 370 C (698 F) to determine the water level. Figure 1.2 - Sch
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Introduction to the Hydrastep 2468 Electronic Gauging System Hydrastep 2468CB and 2468CD Manual Figure 1.3 - Typical Hydrastep 2468 System Installation 1-4 24685034
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Hydrastep 2468CB and 2468CD Manual Introduction to the Hydrastep 2468 Electronic Gauging System 1.2 HYDRASTEP 2468 ELECTRONIC GAUGING SYSTEM The Hydrastep 2468 is a sophisticated and flexible electronic gauging system. It is supplied in two main versions: A Single Power Supply System with Local Level Display A Dual Power Supply System with Local Level Display For both systems, the printed circuit boards are housed in the same enclosure, allowing customers full capability to expand th
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Introduction to the Hydrastep 2468 Electronic Gauging System Hydrastep 2468CB and 2468CD Manual 1.2.3 SYSTEM FAULTS (2468CB OR 2468CD) System fault indication, a yellow LED and an opto-isolated output, is provided for a ‘water above steam’ condition, an electrode fault or wiring failure and the detection of an internal fault. A further fault is indicated when the electrode number switch is incorrectly set. This fault is indicated by a chequered display of red and green LEDs on the level d
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Hydrastep 2468CB and 2468CD Manual Introduction to the Hydrastep 2468 Electronic Gauging System 1.4 HYDRASTEP 2468 UPGRADE PATHS AND AVAILABLE OPTIONS Table 1.1 describes the available versions of the Hydrastep 2468 Electronic Gauging System and their possible options. Available Options Existing System Comments Description Part No. Relay output board 24680504C } 2468 CA or } 2468 CC Time delay relay 24680509B } Up to two boards (of any one output board } type) can be fitte
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Introduction to the Hydrastep 2468 Electronic Gauging System Hydrastep 2468CB and 2468CD Manual 1-8 24685034
