Electromagnetic Flowmeters

Transcription

1 Instruction Manual BOOK 5 Fault Finding IM/MM/BK5_6 Electromagnetic Flowmeters MagMaster TM

2 ABB The Company We are an established world force in the design and manufacture of instrumentation for industrial process control, flow measurement, gas and liquid analysis and environmental applications. As a part of ABB, a world leader in process automation technology, we offer customers application expertise, service and support worldwide. EN ISO 9001:2000 RE GISTERED Cert. No. Q EN (ISO 9001) We are committed to teamwork, high quality manufacturing, advanced technology and unrivalled service and support. The quality, accuracy and performance of the Company s products result from over 100 years experience, combined with a continuous program of innovative design and development to incorporate the latest technology. Lenno, Italy Cert. No. 9/90A Stonehouse, U.K. The UKAS Calibration Laboratory No is just one of the ten flow calibration plants operated by the Company and is indicative of our dedication to quality and accuracy Use of Instructions Warning. An instruction that draws attention to the risk of injury or death. Note. Clarification of an instruction or additional information. Caution. An instruction that draws attention to the risk of damage to the product, process or surroundings. Information. Further reference for more detailed information or technical details. Although Warning hazards are related to personal injury, and Caution hazards are associated with equipment or property damage, it must be understood that operation of damaged equipment could, under certain operational conditions, result in degraded process system performance leading to personal injury or death. Therefore, comply fully with all Warning and Caution notices. Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual for any other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval of the Marketing Communications Department. Health and Safety To ensure that our products are safe and without risk to health, the following points must be noted: 1. The relevant sections of these instructions must be read carefully before proceeding. 2. Warning labels on containers and packages must be observed. 3. Installation, operation, maintenance and servicing must only be carried out by suitably trained personnel and in accordance with the information given. 4. Normal safety precautions must be taken to avoid the possibility of an accident occurring when operating in conditions of high pressure and/or temperature. 5. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry. Normal safe handling procedures must be used. 6. When disposing of chemicals ensure that no two chemicals are mixed. Safety advice concerning the use of the equipment described in this manual or any relevant hazard data sheets (where applicable) may be obtained from the Company address on the back cover, together with servicing and spares information.

3 CONTENTS Page BOOK 5 FAULT FINDING Section Page SAFETY MEASURES INTRODUCTION FAULT FINDING Alarms Test Mode Fault Finding Flow Chart INTRODUCTION A very powerful test mode, especially useful during commissioning and plant fault finding, enables all external devices connected to the MagMaster to be tested over the full range of flow rates. This mode can be used regardless of flow conditions in the sensor, or even with the sensor disconnected, and does not require the use of additional equipment. SAFETY MEASURES MESURES DE SÉCURITÉ Warning. EXPLOSION HAZARD. SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I, DIVISION 2. EXPLOSION HAZARD. DO NOT REMOVE FUSE OR DISCONNECT POWER LEADS WHILE CIRCUIT IS LIVE. THE LOCAL TERMINAL MUST NOT BE USED WHEN THERE IS AN EXPLOSION RISK. Avertissement. RISQUE D EXPLOSION. SUBSTITUTION DE COMPOSANTS PEU RENDRE CE MATÉRIAL INACCEPTABLE POUR LES EMPLACEMENTS DE CLASSE I, DIVISION 2. RISQUE D EXPLOSION. NE PAS RETIRER LE FUSIBLE NI DÉBRANCHER LES FILS D ALIMENTATION TANT QUE LE CIRCUIT EST SOUS TENSION. NE PAS UTILIZEZ LE TERMINAL LOCAL EN ATMOSPHÈRE EXPLOSIVE. Warning. Installation and maintenance must only be carried out by suitably trained personnel. HAZARDOUS AREA DESIGNATION ON THE EQUIPMENT LABEL MUST BE SUITABLE FOR THE INTENDED DUTY AND LOCATION. All relevant sections of this manual must be read before selecting a location. Safety requirements of this equipment, any associated equipment and the local environment must be taken into consideration. The installation and use of this equipment must be in accordance with relevant national and local standards. 1

4 2 FAULT FINDING Warning. Observe all safety measures (See INTRODUCTION). Take all precautions to avoid risk to personnel, plant and risk of explosion in hazardous areas. Do NOT open the transmitter main casing. There are no user serviceable parts or adjustments inside. Service access is restricted to the termination area Should the MagMaster fail to operate, first check the power supply, then the power supply connections and fuse located in the termination area. If necessary, replace the fuse with one of the correct rating as listed in Book 6. Note. All approved versions to use specified fuses see Book 6. Check that all external connections are made correctly. 2.2 Test Mode To access the Test Mode, connect a terminal device to the Programming Connector as described in APPENDIX A Section. Select Engineer security level (see Configuration Section). Set Test Mode parameter to 1 and enter an appropriate flow rate in the Test Flow parameter. Output responses may now be viewed from the various Test parameters. (See Configuration Section for full details of operation.) Warning. Refer to Safety Measures if a data terminal is to be used to diagnose faults in hazardous locations. 2.1 Alarms The transmitter has built in diagnostics with alarm indication which interrupts the transmitter local display. A data terminal connected to the transmitter will display these alarms in Read Alm parameter; 16 from Main Menu (see Warning in next column). The table below shows possible alarm indications and Fig. 2.1 Fault Finding Flow Chart indicates checking procedures to find the problems causing the alarms. For method of interrogating the local display see Startup Section in Book 4. Table 2.1 Display MtSnsr Hi Lo Anlg Pls Coil Possible Alarm Indications Alarm Empty Sensor High flow Low flow Analogue over range Pulse frequency limited Sensor Coil open circuit 19, 20, 21 See Fault Finding Flow Chart 2

5 FAULT FINDING 2.3 Fault Finding Flow Chart Flowrate Wrong? Connect terminal and check the following Calibration factors: [461] = 1 [462] = 1 [B3] Pipe Size [B51] Cal Fact 1 # # # For full bore meters. Otherwise see AquaProbe manual. Is the pipe full? Coil CD1 CD2 Check Sensor Cable continuity for CD1 & CD2 Sensor Coil < 20 ohms Resistance If Sensor and Cable o.k. Tx is faulty. / Coil When communicating with MagMaster Log-in at 'engineer' level [31*engineer] Remember: MagMaster has a 'Test' mode for setting flow and testing all outputs and alarms. See Menu 'C' Mtsnsr Check Connections against drawings in the Manual. Ensure black anti-microphonic screens have been removed. Mtsnsr Mtsnsr Dirty Electrodes? Is the pipe full? Test for fouled Electrodes: If flow is at zero monitor Mtsnsr mv [A2]. If value is > 50 then electrodes o.k. If flow present use an ANALOGUE meter to measure resistance to Earth from SIG1/SIG2. Value < 50 kohms. (for water). Mtsnsr will be displayed if voltage between DS1 & DS2 > 1 Volt. If so, clean electrodes Short circuit SIG1 & SIG2 to SIGGND at Transmitter. If alarm ceases move the shorting links to the Sensor terminals. Have the Black anti- microphonic screens been removed? Check connections are correct. Check cable continuity Totalizer Reset To enable Menu [73*1] Anlg ma Connect terminal and check Flow Rng [41] Modify, if necessary. Current cannot reach Full Scale - Check loop resistance < 600 ohms. If O/P current not correct. Remove cables from MagMaster and read value from [54], Anlg ma. Check against local meter. ISS.C. 18:10:94 > m^ Ltr/s MagMaster 7 If Display is flashing- Select Alarm Display PLS Connect Terminal and check that MagMaster is sending pulses Read Pls Hz [64] If necessary modify Pls Fact [61] Yes - check connecting arangement. No - Select Test Mode [C1*1] and enter test flowrate [C2] Note: FoutA = FWD Flow FoutB = REV Flow System Alarms. totalizer error. 19-Possible 20-Possible Memory error 21-Possible Configuration error. To Reset: [16*0] If alarm persists contact ABB K-T ABB Kent-Taylor MagMaster RS232 Connect RS232 Terminal to Communicate with MagMaster Menu commands shown [ ] Alarms: ALM1 & ALM2 Alarm Problem: Two Items to check - Check that the wanted alarm is selected and any unwanted (Default) alarms are de-selected. The remote equipment is compatible with the MagMaster Open Collector Output. Note: Capacitive loads may cause the output to current limit. If so, connect a 22 ohm resistor in series with the ALM terminal. Dual Current option: ALM2 = Reverse Analogue O/P. Power V If the display is not functioning then there is no power. Check power source and the MagMaster fuse. Note: D.C. MagMasters contain Red p.c.b's 3

6 4 NOTES

7 PRODUCTS & CUSTOMER SUPPORT Products Automation Systems for the following industries: Chemical & Pharmaceutical Food & Beverage Manufacturing Metals and Minerals Oil, Gas & Petrochemical Pulp and Paper Drives and Motors AC and DC Drives, AC and DC Machines, AC motors to 1kV Drive systems Force Measurement Servo Drives Customer Support We provide a comprehensive after sales service via a Worldwide Service Organization. Contact one of the following offices for details on your nearest Service and Repair Centre. United Kingdom ABB Limited Tel: +44 (0) Fax: +44 (0) United States of America ABB Inc. Tel: +1 (0) Fax: +1 (0) Controllers & Recorders Single and Multi-loop Controllers Circular Chart, Strip Chart and Paperless Recorders Paperless Recorders Process Indicators Flexible Automation Industrial Robots and Robot Systems Flow Measurement Electromagnetic Flowmeters Mass Flow Meters Turbine Flowmeters Flow Elements Marine Systems & Turbochargers Electrical Systems Marine Equipment Offshore Retrofit and Refurbishment Process Analytics Process Gas Analysis Systems Integration Transmitters Pressure Temperature Level Interface Modules Valves, Actuators and Positioners Control Valves Actuators Positioners Water, Gas & Industrial Analytics Instrumentation ph, conductivity, and dissolved oxygen transmitters and sensors ammonia, nitrate, phosphate, silica, sodium, chloride, fluoride, dissolved oxygen and hydrazine analyzers. Zirconia oxygen analyzers, katharometers, hydrogen purity and purge-gas monitors, thermal conductivity. Client Warranty Prior to installation, the equipment referred to in this manual must be stored in a clean, dry environment, in accordance with the Company's published specification. Periodic checks must be made on the equipment's condition. In the event of a failure under warranty, the following documentation must be provided as substantiation: 1. A listing evidencing process operation and alarm logs at time of failure. 2. Copies of all storage, installation, operating and maintenance records relating to the alleged faulty unit.

8 ABB has Sales & Customer Support expertise in over 100 countries worldwide The Company s policy is one of continuous product improvement and the right is reserved to modify the information contained herein without notice. Printed in UK (03.04) ABB 2004 IM/MM/BK5 Issue 6 ABB Limited Oldends Lane, Stonehouse Gloucestershire GL10 3TA UK Tel: +44 (0) Fax: +44 (0) ABB Inc. 125 E. County Line Road Warminster PA USA Tel: Fax: