Instruction manual 973 SmartRadar LT Version: 1.1 February 2002 Part no.: 4416.632_Rev 0 Enraf B.V. P.O. Box 812 2600 AV Delft Netherlands Tel.: +31 15 2698600, Fax: +31 15 2619574 E-mail: Info@enraf.nl http://www.enraf.
Copyright 2000 Enraf B.V. All rights reserved. Reproduction in any form without the prior consent of Enraf B.V. is not allowed. This manual is for information only. The contents, descriptions and specifications are subject to change without notice. Enraf B.V. accepts no responsibility for any errors that may appear in this manual. The warranty terms and conditions for Enraf products applicable in the country of purchase are available from your supplier. Please retain them with your proof of purchase.
Preface Preface This manual is intended for technicians involved in the commissioning and service of the Enraf series 973 SmartRadar LT gauge. A description preceding the technical procedures gives the technical information necessary to understand its functioning. It is recommended to read this description prior to performing any of the procedures. For installation of the 973 SmartRadar LT, please refer to the Installation guides of the 973 SmartRadar LT and SmartRadar Antennas.
Table of contents Table of contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1 Principle of measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.
Table of contents Appendix A Appendix B Appendix C Appendix D Article and part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 ASCII table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Related documents . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 1 Introduction The Enraf 973 SmartRadar LT is a radar based level gauge. It is designed to measure the product level in large storage tanks accurately and reliably. The following options can be added to the basic SmartRadar: • One hard alarm output contact, which can be linked to one of the four programmable alarms in the instrument; • An Infra-Red connector for the configuration tool 847 Portable Enraf Terminal; • An intrinsically safe output to connect the 977 Tank Side Indicator.
Introduction In the 973 SmartRadar LT the microwave signal is generated and led, via the tank separator, to the antenna (refer to figure 1.1). The radar antenna shapes the beam and sends the signal into the tank. The microwave signal reflected from the product is then received by the same radar antenna. The digital electronics in the SmartRadar LT measure both the transmitted and the reflected signal.
Introduction ENRAF Fixed roof tank; Free space F08 antenna (8") Fixed roof tank; Free space T06/W06 antenna on manhole Floating roof tank; stilling well sizes 6", 8", 10" or 12" Pressurised tank; 4" stilling well H04 antenna Figure 1.
Introduction 1.3 Optional functions Optional functions can be added in the SmartRadar LT. The table below gives an overview of all options and related manuals. Option Board Refer to Level alarm output relay (or digital output) ICU Instruction manual ICU Hard alarm output contact (4416.633) Analog level output (4 - 20 mA) ICU_HPO Instruction manual Temperature, Water bottom and Analog output options (4416.
Safety 2 Safety 2.1 Safety aspects of the 973 SmartRadar LT Warning Do not use the instrument for anything else than its intended purpose. The housing of the 973 SmartRadar LT is explosion proof: • • II 1/2 GD EEx d [ib] IIB T4; KEMA 00ATEX2010 certified by KEMA, Netherlands Class I, Division 1, Groups B, C, D T4, according to NEMA Type 4 The covers of the SmartRadar LT are provided with blocking facilities which prevent unauthorised opening.
Safety 2.3 Safety conventions "Warnings", "Cautions", and "Notes" are used throughout this manual to bring special matters to the immediate attention of the reader.
Commissioning 3 Commissioning 3.1 Checks before starting the commissioning Examine the mechanical and electrical installation after the 973 SmartRadar LT is installed on the tank. • • • • Check the connections of all electrical cabling Check that all ground connections are made Check that non-used cable inlets are sealed with appropriate stopping plugs Close all covers carefully (mind O-rings) and apply power 3.
Commissioning Protection level 2 All NOVRAM items which affect the (remote) level reading (such as reference level (RL) or transmission address (TA)) are protected by password 2 (W2). It is possible to modify these data only after entering the correct password W2=XXXXXX , where XXXXXX is the level 2 password. Additional measurement-related items, such as temperature items can also be protected by password 2. Password W2 itself can be read protected by means of jumper J2 on the ICU board.
Commissioning 3.3 Connection of service tool Ensite 3.3.1 Communication via the Enraf field bus line By default, the 973 SmartRadar LT is set on transmission address 00. The 973 SmartRadar LT, and also other types of Enraf gauges, can be connected in parallel to the Enraf field bus line. Each instrument must have its unique transmission address. The items can be programmed using the Portable Enraf Terminal, which is connected via the optional Infrared connector.
Commissioning to Entis Pro and/or other host(s) PC running 'Ensite' to Entis + or other host H 1 H 2 H 3 880 CIU Plus F 1 RS-232C H 1 H 2 880 CIU Prime F 1 F 2 F 3 PC running 'Ensite' PC running 'Ensite' F 2 RS-232C CIU Mains adapter H 4 RS-232C PET interface PET F 4 Enraf Communications Interface Unit ENRAF TL1: transm. addr. 00-29 TL2: transm. addr. 30-59 TL3: transm. addr.
Commissioning Host (4-20 mA or HART ® ) Host (RS-485) PC running 'Ensite' PC running 'Ensite' HART ® modem RS-232C/ RS-485 converter RS-232C PC running 'Ensite' 250 W RS-232C HART RS-485 To one SmartRadar LT To one (or more) SmartRadar LT a) RS-232C communication Figure 3.3 To one (or more) SmartRadar LT b) RS-485 communication c) HART ® communication RS-232C / RS-485 and HART connections 3.3.
Commissioning For remote transmission, the items TA and TI must be programmed and items GT and TS should be checked. All these items reside under protection level 2. Proceed as follows: Item Name Description W2= Protection level 2 Enter password 2. Default level 2 password: ENRAF2 TA= Transmission address TI= EX Tank identifier Two digits. Enter the desired transmission address. If gauges are connected in parallel to the transmission line, each gauge must have its unique transmission address.
Commissioning 3.4 Programming the gauge The 973 SmartRadar LT is pre-programmed at the factory. Depending on the application, a number of additional parameters have to be set. Note: The items described in this section are typical for the basic 973 SmartRadar LT.
Commissioning 3.4.1 Selecting dimension and decimal separator When one or more dimension items are changed, all items with related formats will be automatically changed and the values will be automatically converted to the new dimension. The same applies for the decimal separator. The SmartRadar LT can be completely programmed in another dimension than it is intended to operate in. Just change the item LD (and any other dimension items).
Commissioning 3.4.2 Level start-up Refer to figure 3.4 for level start-up tank parameters. To get the level from the gauge without any compensation enabled, only the following items should be programmed. H04 antenna Radar reference OR Radar reference AB Radar reference AU Maximum Safe fill height PR H02 antenna Level Radar reference SF RL Radar reference Tank zero Figure 3.
Commissioning Item Name Description W2= Protection level 2 Enter password 2 to alter the required settings. EX BD= Stilling well diameter Floating point format; units: metres. This item contains the internal diameter of the stilling well (only if the SmartRadar LT is installed on a stilling well). OM= Radar operational mode This item contains one character, which determines the operational mode and depends on the antenna.
Commissioning AdvancedDSP level calculation routine Under certain installation conditions, the product level calculation can be done more accurately when the AdvancedDSP level calculation routine is enabled. In that case the calculated level is less sensitive for obstructions in the microwave path, like equalisation holes in stilling well, welding seams and multipath effect from tank shell. Make sure that obstruction zones are well defined (refer to section 3.4.4: Obstruction reflections).
Commissioning 3.4.4 Zones and threshold settings The tank height is divided into 3 measuring zones: Antenna zone, Product zone and Bottom zone. In addition, ten obstruction zones can be programmed. Refer to figure 3.5. Please note that the X-axis from figure 3.5 indicates ullage. The zero point on the X-axis represents the "Radar reference". This is in most cases the nozzle height, with respect to the tank zero, on which the antenna is mounted (item PR; position radar). Refer also to figure 3.4.
Commissioning SmartRadar Refl. Diagram. [dB] Min. Ull Max. SF. TI : TK-200 08-11-1996 12:31 BA417-1899001-D0 File: TK-20000.RD3 SN:.18739640023 7.450 90 Tank Zero 80 70 60 RB Product reflection 50 40 Antenna zone threshold 30 Product zone threshold ZA 20 Antenna position ZP ZB 10 0 Figure 3.6 Bottom zone threshold 0 2 4 6 8 10 14 12 [m] Reflection diagram The area between antenna zone length and the bottom zone is called "product zone".
Commissioning Changing the settings for the zones and thresholds should be done, on the basis of information from a reflection diagram. Refer to manual of the Ensite service tool, for a description how to obtain a reflection diagram. It should be common practice at installation of the 973 SmartRadar LT gauge to make a reflection diagram and, if necessary, adjust the zones and threshold settings.
Commissioning Item Name Description FC Freeze RSP data The freeze Radar Signal Processing data is a command that stores all relevant radar processing data in RAM memory. Wait approximately 5 seconds before requesting the next data. 5C Number of peaks above threshold This item contains the number of peaks above the threshold settings. The maximum number is 15; when more peaks are detected, only the 15 strongest peaks are listed. 5D.0.
Commissioning Figure 3.8 shows a Reflection Diagram in which an obstruction is found at approximately 8 m level (6.25 m ullage). The product reflection is found at approximately 3.8 m level (10.44 m ullage). In this example, the following settings should be selected: Obstruction zone start at 5.85 m ullage (at least 0.4 m before the obstruction reflection). Obstruction zone end at 6.65 m ullage (at least 0.4 m after the obstruction reflection). Obstruction zone threshold at 5 dB.
Commissioning It is advised to use obstruction area’s for recognizable obstruction peaks that stay below the zone threshold (for instance: welding seams from the tank shell or stilling well, or roof truss). Obstructions from welding seams can be recognized as they appear at regular intervals. Refer to figure 3.9. Select the peaks in the reflection diagram, which are known to be caused by an obstruction. Mark the obstructions with an obstruction zone. The length of the obstruction zone should be at least 0.
Commissioning 3.4.5 Alarm settings Refer to figure 3.10. High level alarm (HA) and low level alarm (LA) conditions are transmitted to the host via the communication lines. SF AH HA AH LL HH LA Tank zero Figure 3.10 Alarm settings Item Name Description W2= Protection level 2 Enter password 2 (default password: ENRAF2) EX AH= Level alarm hysteresis Format according to item LD. Sets alarm hysteresis HA= High level alarm Format according to item LD. High level alarm set point.
Commissioning 3.4.6 Ullage readout The two items described in this section need only be programmed, when ullage readout is required. Refer to figure 3.11. UR Tank zero Figure 3.11 Upper reference value Item Name Description W2= Protection level 2 Enter password 2 (default password: ENRAF2) UR= Upper reference Format according to item LD. The upper reference value is only used when 'Ullage' is to be read from the 973 SmartRadar LT gauge.
Commissioning 3.4.7 Password protection Item Name Description W2= Protection level 2 Enter password 2 (default password: ENRAF2) EX W1= Password 1 6 Characters, default value W1=ENRAF1. This password can be read protected by jumper J1 on the ICU board. If this jumper is set to position 1, the password can not be read W2= Password 2 6 Characters, default value W2=ENRAF2. This password can be read protected by jumper J2 on the ICU board.
Commissioning Item Name Description W1= Protection level 1 Enter password 1 Low product reflection warning delay counter Two digits; default value: 75. The maximum value is 99 and then the delay is approximately 1 minute. During the delay, the last valid measured level is transmitted as the product level. Exit Exit protection level FI= EX Reduced accuracy Obstructions in the tank may produce reflections.
Commissioning 4S= 2nd Level calc. decision switch EX Exit Ten characters; default setting: - - - - - - - - - Pos. Char. Function 1 - Normal communication mode (other settings are used for broadcast mode) 2 P Plain selection of peaks (only for internal testing) - Intelligent peak selection 3 R Measurement by means of roof reflector - Measurement direct on product 4 - 10 - Not used Exit protection level.
Commissioning 3.4.9 Additional adjustment with measurement on stilling well The propagation speed of the microwave, and hence the level measurement, depends on the inner diameter of the stilling well. The smaller the diameter, the lower the propagation speed, resulting in a larger measured radar ullage. Item BD holds the inner diameter of the stilling well. When the real value of the inner diameter differs from the setting in item BD, the SmartRadar has a ‘gain’ error in the level measurement.
Commissioning An example with an S10 antenna: Item BD is programmed as 254 mm. At 19 m level, the deviation of the SmartRadar LT level is: -2 mm; At 2 m level, the deviation of the SmartRadar LT level is: +3 mm. BD new = 0.036568 1- 17 17 - 0.005 2 x 1 - 0.0013372 2 0.254 = 0.2576 [m] Note: After the new stilling well diameter is programmed, the SmartRadar LT must be set to level with the RL and AR sequence.
Commissioning 3.5 Data items The table below lists a number of data items. They contain measured data, verification data and error data. The verification data can be used to check the peak selection result. The radar status indicates the validity of the measured data. The error data provide low level error information about the instrument (refer to section 4.5).
Service and troubleshooting 4 Service and troubleshooting The 973 SmartRadar LT does not require preventive maintenance. For mechanical and electrical installation details, refer to the installation guides of the Antennas and the SmartRadar LT Depending on the application, the Antenna may over time become too contaminated for accurate level measurement. This condition is then signalled by the built-in diagnostics of the 973 SmartRadar LT. Then a warning code (WC: 07001) is generated.
Service and troubleshooting 4.2 The instrument covers The SmartRadar LT enclosure is water proof IP67. For this purpose, the covers are fitted with O-rings. Check the O-rings before closing the instrument. Caution Do not damage the thread of the covers and 973 housing and keep the thread free of dirt. After opening, grease it lightly with anti seize grease. When closing, never tighten the covers before the threads are properly engaged.
Service and troubleshooting Item Name Description W2= Protection level 2 Enter password 2. Clear min max diagram Clears all elements of item 4T by writing 30H in them (sets 4T to default). Exit Exit protection level. CZ EX 4.4 Alarm loop checking Normally, level alarms can be verified when the level reaches the low level or high level alarm set point. The level alarms and, if applicable, the hard alarm contact coupled to one of the level alarms, can be checked by a “loop check” command.
Service and troubleshooting 4.5 Error codes and status information The 973 SmartRadar LT is an instrument with error reporting. Detected errors can be requested by the 847 PET (optional) or by the service tool Ensite.
Service and troubleshooting 4.5.2 APU warning code (item WC), error code (item EE) and status request (item QR) of ICU board Some ICU (APU part) warning codes of item WC (indexed item of 10 elements) are listed below, with suggestions for solving the problem. For a complete overview, refer to item help in the service tool Ensite.
Service and troubleshooting Item QR consists of 2 bytes (Byte 0, Byte 1) with status information of the ICU board (APU part). Status byte 0: Status byte 1: bit 0 : Low level alarm bit 0 : Level fail 1 : Low low level alarm 1 : Warning (for example: sensor contaminated) 2 : High level alarm 2 : Last valid level used 3 : High high level alarm 3 : Reduced accuracy 4 : General ICU fail 4 : Out of measuring range (close to antenna) 5 : Init / No previous store command 5 : Blocked 6: 1 6: 1 7: 0 7: 0 4.5.
Service and troubleshooting 4.6 Updating software The 973 SmartRadar LT is a multiple microprocessor gauge. If a new software version is installed, or an option board is added, it may be necessary to replace one or more of the program memories (EPROM) on the processor boards of the 973 SmartRadar LT. The actual version of the installed software can be checked with item SV. In case of a software update, check whether the contents of item SV correspond with the documentation accompanying the new software.
CN6 'D' 'D' 'C' CN1 1 CN5 2 CN3 CN2 'D' 'C' N 'A' 'A' 'C' CN1 CN5 4 CN8 CN7 C 2 N C CN3 CN1 4 CN8 CN7 'B' 'C' 3 CN3 CN2 'B' 1 CN1 'D' CN1 CN6 Service and troubleshooting 'B' 3 2 'C' 'C' 'C' 'B' 'A' 'D' Figure 4.
Service and troubleshooting 4.6.3 Replacing software (EPROM’s) on ICU board a) XPU-2 EPROM / NOVRAM: When no optional interface board (ICU_HPI) is installed; Locate ICU board (refer to figure 4.3 and to Appendix C). Remove EPROM and insert new EPROM (mind notch!). Remove NOVRAM and insert new NOVRAM (mind notch!). When optional interface board (ICU_HPI) is installed; When optional communication board (ICU_RS232/485 or ICU_HPO) is installed; Loosen the 4 Allen head screws, marked “A” in figure 4.
Service and troubleshooting Put ICU board with mounting plate in place (mind the connector!) and secure it with the 4 Allen head screws. Insert all connectors which where disconnected. 4.6.5 NOVRAM init Close covers and apply power. If NOVRAM needs to be formatted, proceed as follows: a) If Infra-Red connector is present: Issue the command IN on the PET three times in sequence. After the third time the NOVRAM will be formatted and the message: "NV-data initializing" appears.
Appendix Appendix A Article and part numbers It is recommended to keep one set printed circuit boards on stock for spare. Refer to the figure on the next page. No. Description Part. no. 1 Front cover 0186.853 2 O - ring (215 x 4 NBR70) 2132.990 3 3 b 3 Communication board ICU_RS232/485 board ICU_HPO board Allen head screw M3 x 8 st.st. Spring washer M3 st.st. (option) (RS-232c or RS-485) ® (analog 4-20 mA + HART ) (4 x) (4 x) 0973.611 0973.612 6409.033 6487.003 4 Fuses (2 x) (ac supply: 1.
Appendix 1 2 3 4 5 6a 6 8 10 11 12 13 6b 3a 5a 7a 3b 5b 7b 7 8a 8c 9 8b 8d 9a Exploded view 973 SmartRadar LT The printed circuit boards are delivered without EPROM's and on the ICU board, also the NOVRAM is not installed. These should ordered separately; the part numbers are: EPROM Part no. EPROM Part no. ICU - APU L&H (set) 0181.302 ICU_HPI 0181.311 ICU - XPU-2 0181.301 NOVRAM (ICU - XPU-2) 2518.929 RFB-2 / DAB 0181.
Appendix Antenna type part numbers Antenna type Stem length [mm] Part number S06 6" stilling well 0050 0300 0500 0800 0873.911 0873.913 0873.915 0873.918 S08 8" stilling well 0050 0300 0500 0800 0873.921 0873.923 0873.925 0873.928 S10 10" stilling well 0050 0300 0500 0800 0873.931 0873.933 0873.935 0873.938 S12 12" stilling well 0050 0300 0500 0800 0873.941 0873.943 0873.945 0873.948 F08 8" free space 0050 0300 0500 0800 0873.971 0873.973 0873.975 0873.
Appendix Appendix B ASCII table Page 50
Appendix Appendix C PCB layout J1 P DAB EPROM W Antenna SEEPROM X mP LSC ART MUM ICU_HPI board RFB-2/DAB board alarm relay (optional) APU (H) EPROM x x APU (L) EPROM NOVRAM x mP x XPU-2 EPROM mP jumpers ICU_HPO board ICU board Layout of different processor boards The x inside the EPROM in the figure above notes the notch on the EPROM. The notch of the EPROM must fit with the notch of the EPROM socket on the processor board.
Appendix Appendix D Related documents Title Part No. Installation guide 973 SmartRadar LT Installation guide SmartRadar Antennas Model 973 SmartRadar LT Safety instructions for installation, commissioning, operation and maintenance 4416.641 4416.642 Instruction manual 973 SmartRadar LT Hard alarm output contact Instruction manual SmartRadar Verification pin compensation 4416.633 4416.635 Instruction manual ENSITE service tool Instruction manual 847 PET 4416.587 4416.
Index Index Accept reference . . . . . . . . . . . . . . . . . . . . 22, 35 Acceptance criterium . . . . . . . . . . . . . . . . . . . . 31 AdvancedDSP . . . . . . . . . . 21, 22, 26, 28, 32, 34 Alarm settings . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Alarm test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Amplitude of detected peaks . . . . . . . . . . . 26, 36 Analog level output . . . . . . . . . . . . . . . . . . . . . 6, 9 Antenna . . . . . . . . . . . . . . . . . . . . .
Index PI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 PR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21, 41 QH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 QR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36, 42 RD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 RI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21, 36 RL . . . . . . . . . . . . . . . . . . . . . . . 22, 35, 41, 46 RT . . . . . . . . . . .
Notes Instruction manual 973 SmartRadar LT Page 55
Notes Page 56
