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Maintenance 

Chapter 

4 

 

Maintenance 

4-1 Introduction 

This chapter describes basic maintenance requirements for the ADFM. 

•

 

How to replace or recharge the desiccant  

•

 

How to replace and recharge the system batteries 

•

 

How to change fuses 

•

 

How to change the mains supply voltage selection 

 

CAUTION. 

Never open the Electronics Housing inside a corrosive 

atmosphere.  Severe damage to the PCBs can occur.  Damage may not 
appear right away, but will shorten the lifespan of all internal components. 

4-2 Desiccant 

Desiccant is used to dehumidify the electronics housing interior.  The fac-
tory-supplied desiccant lasts a year.  Remember that desiccant rapidly ab-
sorbs moisture from ambient room air.   

Used desiccant bags may be dried at 250° for 14 hours.  As a minimum, re-
place the desiccant bags (

Table 4-16, item 08

) whenever the electronics 

housing is opened, or you are preparing to deploy or store the ADFM for an 
extended time. 

 

CAUTION. 

Do not open the desiccant bag.  Contact with the silica gel can 

cause nose, throat, and skin irritation. 

 

 

NOTE. 

Desiccant bags are shipped in an airtight aluminum bag to ensure 

maximum effectiveness.  There is a moisture indicator inside the bag.  If 
the moisture indicator is pink, do not use the desiccant bag until it has 
been dried.  MGD recommends replacing the desiccant bag just before the 
deployment. 

 

ADFM Technical Manual (January 2000) 

page 4-1 

Содержание ADFM Analog Output Module

Страница 1: ...oustic Doppler Flow Meter T E C H N I C A L M A N U A L This manual includes information for the following products ADFM Pro20 ADFM Analog Output Module ADFM Hot Tap Teledyne Isco P N 69 7103 001 January 2000 ...

Страница 2: ......

Страница 3: ...es Inc was acquired as a subsidiary of Teledyne Isco Inc in December 2005 and was merged into Teledyne Isco in May 2006 New contact information is printed below Teledyne Isco Inc 4700 Superior Street Lincoln Nebraska 68504 800 228 4373 402 464 0231 FAX 402 465 3022 E mail Customer Service IscoCSR teledyne com E mail Technical Service IscoService teledyne com Web site www isco com Copyright 2000 by...

Страница 4: ...s indicates the revision level of the software and or firmware of this instrument at the time of the manual or update was issued Many product updates and fixes do not require manual changes and conversely manual corrections may be done without accompanying product changes Therefore do not expect a one to one correspondence between product updates and manual updates The total number of pages in thi...

Страница 5: ...Table of Contents RECORD OF CHANGES Edition Effective Description 3 February 96 Firmware version 6 17 through 6 30 4 January 00 Firmware version 6 37 ADFM Technical Manual January 2000 iii ...

Страница 6: ...Table of Contents NOTES iv MGD Technologies Inc ...

Страница 7: ...wer Cable 2 4 DC Power Supply Cable 2 4 2 3 3 Applying Power 2 5 2 4 Built In Tests BITs 2 5 2 4 1 Testing Interval 2 5 2 4 2 Test Record 2 5 2 4 3 Power UP BIT Procedure Sequence 2 6 2 5 Final Preparations for Use 2 6 2 5 1 Measure Pipe or Channel Geometry 2 6 2 5 2 Prepare Installation Hardware 2 7 2 5 3 Install Software and Configure Station File 2 8 2 5 4 Installing and Deploying the ADFM 2 9 ...

Страница 8: ...4 5 4 3 Transmit Test 5 5 5 4 4 Sensor Test 5 6 5 4 5 Modem Test 5 7 5 4 6 Recorder Test 5 7 5 5 Using WinADFM to Test the ADFM 5 8 5 5 1 Connect 5 8 5 5 2 Bench Test 5 8 5 5 3 Field Test 5 9 ADFM Troubleshooting 6 1 6 1 Introduction 6 1 6 2 Equipment Required 6 2 6 3 Power On Fault Isolation 6 3 6 4 Fault Isolation 6 3 6 5 Least Replaceable Assembly Fault Isolation 6 6 6 5 1 Built in Test is Not ...

Страница 9: ...rfaces B 6 B 2 4 Power and Frequency B 6 Power B 6 ADFM Commands C 1 C 1 Introduction C 1 C 1 1 ADFM Data Communication and Command Format C 2 C 1 2 Command Input Processing C 2 C 1 3 Data Output Processing C 3 C 2 Command Descriptions C 6 Help Menus C 7 Break C 7 C 2 1 Control System Commands C 8 CA Communication Timeout C 8 CB Serial Port Control Baud Rate Parity Stop Bits C 8 CF Flow Control C ...

Страница 10: ...uilt In Tests C 24 PS Show System Parameters C 24 PT Built In Tests C 25 PT0 Help C 26 PT1 Board Level Receive Test C 27 PT2 Ancillary System Data C 28 PT3 Receive Path C 28 PT4 Transmit Path C 29 PT5 Electronics Wrap Around C 30 PT6 Receive Bandwidth C 31 PT8 Checksum Lookup Tables C 32 C 2 5 Discharge Commands C 33 QB Bed Level C 33 QC Channel Type C 33 QD Algorithm Select C 33 QF Force Depth C ...

Страница 11: ...C 47 VP Pings per Ensemble C 47 VS Vertical Beam Depth Cell Size C 47 VX Vertical Beam Transmit Length C 47 C 2 9 Water Profiling Commands C 48 WC Correlation Threshold C 48 WD WT Data Out C 48 WE Error Velocity Threshold C 48 WF WT Blank After Transmit C 49 WG Percent Good Minimum C 49 WM WT Profiling Mode C 49 WN WT Number Of Depth Cells C 50 WO Single Beam Mode Select C 50 WP WT Pings Per Ensem...

Страница 12: ... 1 Electronics Unit Block Diagram A 7 Figure A 2 Transducer Block Diagram A 9 Figure B 1 ADFM Transducer Dimensions B 2 Figure B 2 ADFM Field Housing Dimensions B 3 Figure C 1 Pipe Heights Epsilons C 34 List of Tables Table 1 1 User Data Interface Types 1 6 Table 4 1 List of ADFM Replacement Parts 4 6 Table 6 1 List of Least Replaceable Assemblies 6 1 Table 6 2 Required Test Equipment 6 2 Table 6 ...

Страница 13: ...Table of Contents NOTES ADFM Technical Manual January 2000 xi ...

Страница 14: ...Table of Contents xii MGD Technologies Inc ...

Страница 15: ...ting 1 2 Getting Started Please take the time to read these instructions We have tried to make the ADFM and it s manual easy to use Before using the ADFM to collect real data Page through this manual to become familiar with its contents Familiarize yourself with ADFM components by looking at dia grams Use Chapter 2 to install connect test and deploy the ADFM Use Chapter 3 to issue software command...

Страница 16: ...every time you use your ADFM Please refer to this list often Before mains power is supplied to the ADFM the protective earth ground terminal of the instrument must be connected to the protective conductor of the mains power cord The mains plug shall only be inserted in a socket outlet provided with a pro tective earth contact The protective action must not be negated by the use of an extension cor...

Страница 17: ...le and when inevitable should be carried out only by a skilled person who is aware of the hazards involved Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of supply 1 4 ADFM Components Overview Figure 1 13 illustrates the three major components of a ADFM system Two components are installed at each site a transducer installed in the...

Страница 18: ...ler ADFM is a flow meter based on the Dop pler principle The ADFM consists of a transducer assembly mounted in the flow a signal processing unit and an interface cable 1 4 2 Principles of Operation Figure 1 24 shows a typical ADFM installation for measuring open channel flow in a pipe A transducer assembly is mounted on the invert of a pipe or channel Piezoelectric ceramics emit short pulses along...

Страница 19: ...rates Pro file 2 Since Doppler measurements are directional only the component of veloc ity along the direction of transmit and receive is measured as shown in Figure 1 35 Narrow acoustic beams are required to accurately determine the horizontal velocity from the measured component The narrow acoustic beams of the ADFM insure that this measurement is accurate Also the range gate times are short an...

Страница 20: ...lic conditions insuring an accurate esti mate of flow rate 1 4 3 User Data Interfaces The ADFM has three user data interfaces which are listed in Table 1 16 be low Table 1 1 User Data Interface Types Type Description RS 232 Serial Data Interface EIA standard RS 232C used for local data communication with the ADFM Not to be used over distances more than 15 meters Maximum baud rate is 57600 Baud RS ...

Страница 21: ...loyment Packing and shipping information The general sequence of events in installing and deployment of an ADFM are Prepare portable computer to be taken to installation site Perform pre installation equipment and operational checks Connect the ADFM Transducer and Electronics Unit via the Transducer Cable Measure channel dimensions and determine geometry Setup ADFM configuration file for each inst...

Страница 22: ...t during the initial testing procedure please notify MGD Technologies Inc as soon as possible If the shipping container is damaged or the cushioning material shows signs of stress no tify the carrier as well as MGD Technologies Inc Keep the shipping mate rials for the carrier s inspection 2 3 System Interconnection Use Figure 2 12 to connect the ADFM cables and the computer 115 to 230 VAC 50 60 Hz...

Страница 23: ...igned Thread the coupling ring onto the receptacle to complete the connection Reverse this procedure when disconnecting the cable from the electronics unit 2 3 2 Power Supply to the ADFM CAUTION BEFORE connecting mains AC power to this instrument be sure the line voltage selector jumpers inside the Electronics Unit is set properly and the correct fuse is installed Power Supply Options The ADFM is ...

Страница 24: ... THIS INSTRUMENT TO MAINS the protective earth ground terminal of the instrument must be connected to the protective conductor of the mains power cord The mains power cable must be connected to a protective earth contact The protective action must not be negated by use of an extension cord power cable without a protective conductor grounding Grounding a two conductor outlet does not provide an ins...

Страница 25: ...e LCD display culminating in a display showing the ADFM firmware version number on the first line and a hexadecimal coded error map on the second line The software used to operate the ADFM will periodically report and reset the error code map and to re run selected tests By interpretation and further fault isolation it is possible to isolate a hardware problem to a least re placeable assembly LRA ...

Страница 26: ... and BIT error code map see Chapter 5 for details ADFM Ver V6 xx 09000080 d To repeat the power up BIT tests you may turn and release the Reset key switch located on the front panel of the Electronics Unit 2 5 Final Preparations for Use 2 5 1 Measure Pipe or Channel Geometry In order for the ADFM to measure flow accurately it must have information about the pipe or channel in which it is installed...

Страница 27: ...nvert of the pipe Enter these dimensions into the Zero Off set box in the WinADFM setup screen Level of silt in the pipe or channel should be entered into the Bed Level box in the WinADFM setup screen 2 5 2 Prepare Installation Hardware Installation hardware is available from MGD Technologies Inc for a variety of channel shapes and sizes Please contact MGD Technologies Inc for fur ther information...

Страница 28: ...imilar should be used to minimize rotational mis alignment Transducer must be installed such that positive longitudinal flow direction is from the non cable side of the transducer to the cable side See Figure 2 38 below for further explanation of the flow direction Positive Downstream direction of flow x v z out of page TOP Figure 2 3 Transducer Orientation 2 5 3 Install Software and Configure Sta...

Страница 29: ...DFM may be shipped with batteries installed however all key switches should be in the off position for shipment Removal of batteries from the unit may be desirable to reduce the shipping weight 2 6 1 Tagging For Service If the instrument is to be shipped to MGD Technologies Inc for service or repair attach a tag to the instrument identifying the owner address of owner complete instrument model and...

Страница 30: ...ansducer as sembly to firmly cushion and prevent movement inside the con tainer Special care must be taken to protect the transducer ce ramics on the upper face of the transducer assembly from dam age Seal shipping container securely Mark shipping container FRAGILE to ensure careful handling In any correspondence refer to system by model number and se rial number page 2 10 MGD Technologies Inc ...

Страница 31: ...nd testing of the ADFM However if you are experiencing a spe cific problem with an ADFM or data you may be provided with one of these utilities and instructions for its use 3 2 Computer Requirements The following are requirements for the computer s used to interface with the ADFM Minimum Requirements IBM Compatible 486 processor or better Windows 95 VGA color or better display monitor Hard Drive m...

Страница 32: ...ormation ADFM Chart Settings siteid ch1 siteid ch2 siteid ch3 These files contain the chart settings for a particular site See the WinADFM software manual for further information ADFM Group File groupname sgr This file contains a listing of ADFM station files contained within a group See the WinADFM software manual for further information ADFM Data Files MDDHH xxx downloaded from internal recorder...

Страница 33: ...n tion is as follows rtYYMMDD xxx rt Identifier for Real Time data YY Year data was collected from ADFM MM Month data was collected from ADFM DD Day of month data was collected from ADFM xxx Sequential real time data set collected Example rt970206 003 rt Real time data 97 Data collected in 1997 02 Data collected in February 06 Data collected on the 6th of the month 003 The third real time data set...

Страница 34: ...he binary output data in a hexadecimal format A LOG feature lets you record data to a disk file 3 4 1 Running BBTALK Access the drive directory containing the BBTALK program Type BBTALK at the DOS prompt The program will load and a blank communications screen will appear with the following menu at the bottom of the screen Figure 3 1 BBTALK Menu 3 4 2 BBTALK Help BBTALK has a built in help screen P...

Страница 35: ...is no response from the ADFM check the communications setup in the SETUP MENU and the ADFM Both setups must be the same NOTE If the Caps Lock Num Lock or Scroll Lock keys are activated this may interfere with the ability to send a valid Break signal when pushing the END key 3 4 4 Communication Parameters This menu sets the communications protocol between the ADFM and the computer a Press F5 to vie...

Страница 36: ...rent drive and FILENAME EXT For example type C ADFM SAMPLE TXT T Figure 3 4 BBTALK Log File c If the file already exists the program asks you if you want to over write the existing file d All data sent to the screen will now be written to the file you speci fied You can enable the CAPTURE feature at any time even if the ADFM is already sending data e To disable CAPTURE press F3 and then press Ente...

Страница 37: ...plied desiccant lasts a year Remember that desiccant rapidly ab sorbs moisture from ambient room air Used desiccant bags may be dried at 250 for 14 hours As a minimum re place the desiccant bags Table 4 16 item 08 whenever the electronics housing is opened or you are preparing to deploy or store the ADFM for an extended time CAUTION Do not open the desiccant bag Contact with the silica gel can cau...

Страница 38: ...aline lantern type batteries with a nominal capacity of 13 Ah each see Table 4 16 item 03 The nominal voltage is 24V for all batteries connected in series while the low voltage is 20V They are also commonly available MGD recommends purchasing spare Energizer alkaline lantern batteries CAUTION If the Electronics Unit is connected to a mains power for your own personal safety we recommend that you d...

Страница 39: ...w the bolts securing metal bar and remove bar d Disconnect the harness and reconnect new batteries e Replace the metal bar and bolts f Test the system see Chapter 5 CAUTION Do not short out battery leads when removing the batteries High currents may flow during shorts and fire or personal injury may result THERE IS NO FUSE IN SERIES WITH THESE BATTERIES 4 3 3 Recharging The Lead Acid System Batter...

Страница 40: ...st the system see Chapter 5 4 4 Fuse Replacement The electronics chassis contains a mains supply fuse The fuse is located on the front panel of the Electronics Housing CAUTION Only fuses with the required rated current voltage and specified type should be used Do not repair fuses or short circuited fuse holders To do so could cause a shock or fire hazard a Disconnect the mains power cord b In a no...

Страница 41: ...d before attempting this procedure b In a non corrosive atmosphere remove the top of the unit c Locate plug P4 on the ADFM motherboard Use the following table to determine the correct jumpers Voltage Selection Jumper 115 VAC P4 2 to P4 5 P4 4 to P4 6 230 VAC P4 5 to P4 6 d Label the electronic housing with a label indicating the proper mains supply voltage e Install a fuse appropriate for the sele...

Страница 42: ...t Number Mfgr 01 ADFM Electronics Unit Assembly MGD 02 ADFM Motherboard PCB Assembly MGD 03 Battery Alkaline Latern 6 V 13 Ah Energizer 04 Battery Lead Acid 12 V 12 Ah 975 2000 00 Yuasa or Power Sonics 05 Battery Lithium Coin Cell 3 V 250 mA PR2330 Panasonic 06 Cable Mains Power n a 07 Cable RS 232 Data DB9 M to DB9 F 971 6092 00 n a 08 Desiccant bag X1220 Mil Pac 09 Display LCD 4 x 16 characters ...

Страница 43: ...Maintenance 09 10 or 11 Figure 4 1 ADFM Electronic Housing Exterior View Replaceable Parts Identification ADFM Technical Manual January 2000 page 4 7 ...

Страница 44: ...Chapter 4 15 08 05 14 13 09 12 02 03 Figure 4 2 ADFM Electronic Housing Interior View Replaceable Parts Identification page 4 8 MGD Technologies Inc ...

Страница 45: ...ll equipment is working The tests can help you isolate problems to a major functional area of the ADFM For trouble shooting information see Chapter 6 NOTE The built in tests require you to immerse the transducer faces in water If you do not some of the tests may fail Running the tests in air will not harm the ADFM 5 2 Test Setup Use the following steps to connect the ADFM system and to place the A...

Страница 46: ...e computer screen will display COLD Wakeup and the ADFM s LCD display will show the wake up message RD Instruments Acoustic Doppler Flow Meter c The ADFM s LCD display will begin displaying the results of BIT as these tests are executed The BIT tests will take approximately one or two minutes to perform after which the computer screen will display the wake up message Broadband ADFM Version 6 xx RD...

Страница 47: ...th Test PT6 PASS Clock Interrupt PI PASS Error Log Power Loss Auto Restart Occurred Transducer Communications Error Self Tests Complete Many users tell us their ADFM reports a FAIL condition during the self tests that check the ADFM s electronics wrap test In most cases the cause of the failure is external interference A noisy environment such as in a lab usually causes this external interference ...

Страница 48: ...the ADFM s receive path electronic cir cuits a Start BBTALK Press the End key to wake the ADFM b Type CP to clear the fault log c Type PT3 A message similar to the following should appear pt3 Correlation Magnitude Lag Bm1 Bm2 Bm3 Bm4 Bm5 0 255 255 255 255 255 1 206 212 207 206 212 2 103 118 107 105 119 3 31 47 33 33 49 4 4 15 9 6 16 5 2 3 7 3 7 6 2 2 9 1 5 7 2 2 6 1 4 High Gain RSSI 45 47 44 42 47...

Страница 49: ...ted if you want to run the next test 5 4 3 Transmit Test This test runs a through test on the ADFM s transmit path electronic cir cuits a Start BBTALK Press the End key to wake the ADFM b Type CP to clear the fault log c Type PT4 A message similar to the following should appear pt4 BEAM 1 IXMT 3 1 Ml Amps peak VXMT 4 1 Volts RXMT 1335 6 Ohms peak Transmit Test Results 40 PASS BEAM 2 IXMT 3 1 Ml Am...

Страница 50: ...9 Ml Amps peak VXMT 3 4 Volts peak RXMT 109 7 Ohms Transmit Test Results 0 PASS BEAM 4 IXMT 30 9 Ml Amps peak VXMT 3 4 Volts peak RXMT 109 7 Ohms Transmit Test Results 0 PASS g Observe the RXMT values They should be approximately 109 ohms with the transducer connected 5 4 4 Sensor Test This test checks the internal ADFM sensors temperature and depth a Start BBTALK Press the End key to wake the ADF...

Страница 51: ...power off g Type MO h Verify these readings are present and correct mp0 mo Modem is NOT OK Modem state connect status OFF NOT CONNECTED Primary Port RS 232 5 4 6 Recorder Test This tests the recorder it does not destroy any data a Start BBTALK Press the End key to wake the ADFM b Type CP to clear the fault log c Type RT d Verify these readings are present and correct for your system rt Recorder Me...

Страница 52: ... If checked the log file keeps a record of all communication between the computer and the ADFM once communications have been established 5 5 1 Connect This test establishes communications and determines if the ADFM wake up message contains any errors Determines if the system is ready This test is for either serial RS 232 or modem communications between the ADFM and a laptop The system will return ...

Страница 53: ...age logic Transducer Voltage 5 5 3 Field Test This test performs internal ADFM system checks that should be performed after installation This test does the following Establishes communications and determines if the ADFM wake up message contains any errors ADFM is ready Determines if the receive path is operating properly and returns a Pass or Fail with an error This test will fail if the transduce...

Страница 54: ...Chapter 5 NOTES page 5 10 MGD Technologies Inc ...

Страница 55: ... advises the availability of at least the listed LRAs but an entire replacement system is recommended a LRA is either a printed circuit board assembly or a entire module LRA s are listed for completeness in Chapter 4 including the ordering numbers and other replacement parts and their or dering numbers Table 6 1 List of Least Replaceable Assemblies LRA Description Front Panel Interface Front panel...

Страница 56: ...quipment Critical Specification Digital Multi Meter 3 digit DC Voltage Range 200 0 mV 2 000V 20 00 V 200 0V DC Voltage Resolution 100 uV 1 mV 10 mV 100 mV 1 V respective DC Voltage Accuracy 1 AC Voltage Range 200 V 450 V AC Voltage Resolution 10 mV 20 V range AC Voltage Resolution 1 V 450 V range AC Voltage Accuracy 2 Resistance Range 200 2 k 20 k 200 k 20 Mohm Res Resolution 0 1 1 0 10 100 1k 10k...

Страница 57: ... screen but LCD displays wake up message and completes BIT Possible Cause RS 232 connection Computer s communications port set up wrong Front Panel Interface Board ADFM Motherboard What to Do Troubleshoot cabling Run BBTEST to set up computer s COM port Replace Front Panel Interface Board Replace ADFM Motherboard 6 4 Fault Isolation Symptom Transducer not found Possible Cause Transducer Cable Tran...

Страница 58: ...se Modem Interface Board Modem ADFM Motherboard What to Do Check Modem Interface Board connections to motherboard and to Modem Replace if necessary In BBTALK type MT followed by a CR Then type AT followed by a CR AN OK should be displayed if not the Modem may be defective If none of the above works the ADFM Motherboard may need replacement Symptom Modem found but does not dial out Possible Cause M...

Страница 59: ...statistical test If the percentage of loop test failures is large 10 a problem may have arisen Possible Cause Transducer not connected properly or defective High interference source ADFM Motherboard What to Do Refer to section Least Replaceable Assembly Fault Isolation page 6 6 Eliminate interference source1 or shield transducer environment From BBTALK type PT3 followed by a CR The Correlation Mag...

Страница 60: ...ent at various location on the board in particular where marked with a lightning bolt located inside a triangle CAUTION The ADFM contains Electro Static Sensitive Devices You must take accepted ESD prevention measures BEFORE OPENING THE ADFM ELECTRONICS UNIT The circuitry contains electro static sensitive devices throughout the ADFM Electronics Unit To prevent electro static discharge ESD to these...

Страница 61: ...ectronics Unit by turning the keyed switch labeled RESET to the 1 position release the switch This should start the built in test The wake up message and a series of built in test results should be displayed at the Electronics Unit s LCD please refer to the self test description in Chapter 5 If the above procedure is not successful one possible answer is that the Electronics Unit s motherboard is ...

Страница 62: ...l is in the On position 1 position You have to use the supplied key to rotate the switch If the above procedure is not successful in establishing communications with the ADFM most likely the problem lies within the ADFM s Electron ics Unit You may have to remove the Electronics Unit s top cover for fur ther fault isolation CAUTION You must obey all warnings and cautions regarding power and ESD Ple...

Страница 63: ...ary supply 16 0 1 50 VDC TP4 VCC Receiver supply 5 0 0 15 VDC TP5 VR1 Reference voltage 2 50 0 015 VDC TP6 VXMT Transmitter Transducer supply 5 0 0 15 VDC TP7 VPWR Raw power supply 28 3 0 VDC Mains Vbatt 2 VDC DC If the above test is not successful you may have to replace the Electronics Unit or the Electronics Unit s motherboard g If the above voltages can be measured following the procedure abov...

Страница 64: ...ction between the transducer and the ADFM Electronics motherboard other than the transducer cable the Electronics Unit s top cover has to be removed CAUTION You must obey all warnings and cautions regarding power and ESD Please read these warnings at the beginning of this manual and the beginning of this section To check these connections inspect for proper seating of all connections on the ADFM E...

Страница 65: ...ower supply The necessary supply voltages are derived from mains an external DC supply or an internal 24 volt supply Any combination of supplies is also possible The highest DC voltage in the system will determine which power source will supply the ADFM The mains supply will generate approxi mately 28 VDC Therefore if an internal battery is installed 24 VDC and mains is connected the ADFM will be ...

Страница 66: ...ched on additional power management is provided The CPU can enable power via the receiver power strobe switch RCV PWR STROBE to the receiver portion of the ADFM which includes the receiver amplifier RCV AMP the mixers the low pass filters LPF the limiting amplifiers LIMITER and the data acquisition circuitry FIFO CORRELATOR as its main components Also the 2 50 volt reference voltage VR1 is con tro...

Страница 67: ...een the Electronics Unit of the ADFM and the transducer it connects to the trans ducer transmit input via a IS barrier optional The transmit current is monitored by a current transformer CURR XFMR Its output signal is scaled and digitized and is part of the ADFM s build in self test BIT The timing generator interfaces to the system bus through bi directional digital bus transceivers All timing gen...

Страница 68: ...ority encoding and bus ready control wait state generator are also functions of the de coder The CPU supervisor monitors power and generates an un maskable inter rupt for the MPU to signal a power fail The CPU is able to shut down in a controlled manner If the supply voltage should fall any further the super visor generates a system reset Further more it protects RAM and RTC from an erroneous writ...

Страница 69: ...on port SDIN and SDOUT between the Electronics Unit and the transducer con troller A 3 2 Transmit Path The transmit signal generated by the ADFM s Timing Generator arrives at the transducer electronics terminals labeled XMT It passes through the transmit coupling transformer XMT which provides isolation and imped ance matching The signal then is mutilplexed to one of five beams via the prior selec...

Страница 70: ... Power Supply The transducer power supply terminals are labeled VXDR The supply voltage is lowpass filtered and regulated by a low dropout linear voltage regulator PWR REG The 5 0 volt output VAA1 of the regulator is the primary supply for all transducer modules A 2 50 volt reference voltage VREF provides all bias voltages needed for the pre amplifier and the buffer stage For build in self test pu...

Страница 71: ...MT SIG RS 232 FP INTFC TP59 RSSI 0 2 50V TP51 50mV mA XDCR SER DATA IN IS BARRIER DC POWER ENTRY MAINS POWER ENTRY MAINS 115 230 Vac EXT DC 24 48 Vdc INT BATTERY 24 Vdc PWR FILTER DC DC AUX REG DC DC DC DC CONV RCV PWR STROBE MAIN PWR CONTROL XDCR PWR STROBE DC DC REFERENCE DC DC XDCR PWR REGULATOR XDCR PWR FILTER XMT PWR FILTER VRCV 7 9V TP6 VXMT 7 9V TP5 VR1 2 50V TP4 VCC 5V TP1 VDD1 5V TP3 VDD3...

Страница 72: ...put device PWR FILTER Filter for mains and DC power supply RCV PWR STROBE Power control of on board receiver functions RCV AMP Receiver amplifier RCV XFMR Receive channel input coupling transformer RECORDER Solid state recorder for data storage REFERENCE Reference voltage RSSI Relative signal strength indicator TEST SIG Test signal TIMING GEN Timing generator TP xx Test points XDCR PWR FILTER Tran...

Страница 73: ... PA BEAM 5 XDCR T R SWITCH BPF PA t DC DC DC DC DC XFMR PWR FLT PWR REG T EN REFERENCE XMT VXDR VAA1 5V TEMP SENSOR T SENSE S AMP RCV SIG XDCR CTL XMT SEL XMT SEL XMT SEL XMT SEL XMT SEL XMT SDIN SEL BUFF XFMR SEL SEL SEL SEL A D VREF TEMP ADREF SDOUT MUX CTL Figure A 2 Transducer Block Diagram ADFM Technical Manual January 2000 page A 9 ...

Страница 74: ...wer supply regulator REFERENCE Reference T EN Temperature interface power strobe T SENSE Temperature sensor S AMP Temperature scaling amplifier MUX CTL Multiplexer control XMT Transmit signal SDIN Transducer serial data input from Electronics Unit SDOUT Transducer serial data output to the Electronics Unit VXDR Transducer supply input voltage RCV SIG Transducer output signal TEMP Scaled temperatur...

Страница 75: ...mode output data real time via modem or serial communications or do both Ex ternal AC DC or internal alkaline batteries power the system The ADFM Velocity Profiler transducer assembly shown in Figure B 12 contains four individual velocity transducers that use piezoelectric ceramics for emitting and receiving acoustic signals These four transducers measure velocity throughout the depth of flow A fi...

Страница 76: ...Appendix B 204 00 8 03 83 00 3 27 38 10 1 50 Figure B 1 ADFM Transducer Dimensions page B 2 MGD Technologies Inc ...

Страница 77: ...2 and 232 serial interface is standard as is a 4 line by 16 character LCD for quick determination of the system s status The field housing is compliant with IP 67 equivalent to NEMA 6P and is suitable for mounting in a manhole NOTE All Dimensions are in millimeters in 444 82 440 00 17 32 17 50 357 00 374 65 14 05 14 75 425 20 16 74 305 00 12 01 MAINS TRANSDUCER MODEM RS232 EXT DC 170 12 6 68 Figur...

Страница 78: ... 50 to 1000 ppm Accuracy 1 0 0 01 ft s of reading Water Level Measurement Range 4 7 in to 20 ft Accuracy 0 5 0 2 in of reading B 2 2 Packaging and Environmental Transducer Operating Temperature 23 to 95 F Housing Material Plastic corrosion resistant stain less steel optional Static Pressure 250 psi Nominal 17 atmospheres 550 feet Weight 2 2 lb Electronics Unit Operating Temperature 15 to 125 F Sto...

Страница 79: ...ity profile data per beam and bin velocity data relative to the acoustic beam s coordinate system Echo Intensity Echo intensity data relative backscatter inten sity per beam and bin Data Qualifier Profile data quality indicator Correlation mag nitude Good per beam and bin Temperature Transducer temperature output over a range of 20 T 125 F Sound Speed One output for speed of sound data Leader Outp...

Страница 80: ...2 4 Power and Frequency Power External AC 230 10 VAC 115 10 VAC 50 60 Hz External DC 24 VDC 12 VDC absolute minimum 36 VDC absolute maximum Internal Battery Voltage 24 VDC nominal Internal Battery Capacity 13 Ah 75 F Alkaline 7 Ah 75 F SLA Battery Life 15 minute sampling interval Alkaline 22 weeks SLA 7 weeks page B 6 MGD Technologies Inc ...

Страница 81: ...gura tion file if the Use Advanced check box is enabled in the ADFM Operate window Again only use commands if you know what affect the command will have on your deployment This appendix does not list all of the commands available for the ADFM Only the commands that are required for a successful deployment are documented If you need information on other commands contact MGD NOTE This appendix appli...

Страница 82: ...ing Input commands set ADFM operating parameters start data collection run Built In tests BIT and ask for output data All commands Table A 1 are ASCII character s and must end with a carriage return CR For example WS030 CR Your input is underlined If the entered command is valid the ADFM executes the command If the command is one that does not provide output data the ADFM sends a line feed LF and ...

Страница 83: ... commands used in non volatile RAM The ADFM will continue to be configured from battery backed RAM until it receives a CR command or until the RAM loses its backup power If the ADFM receives a CR0 it will load into battery backed RAM the command set you last stored in EEPROM semi permanent user settings through the CK command If the ADFM receives a CR1 it will load into battery backed RAM the fact...

Страница 84: ...Modem Command s command string MH 1 Hangup on Ping Start 0 No 1 Yes MI Modem Answer Init MM 0 Modem Monitor 0 OFF 1 ON MN 0000000 Dial out Phone Number MO Check to see if the modem is ok MP Modem Power 0 OFF 1 ON MT Modem Terminal MZ Modem Reset PA User Interactive Tests 0 help PC Diagnostic Tests PD 00 Data Stream Select 0 6 PF Display Fault Log PI 011111 Built in Tests Rpt CPU Clk TC DSP Loop PS...

Страница 85: ... min sec TP 00 00 00 Time per Ping min sec sec 100 TS Time Set yr mon day hour min sec VC 000 Proofing of depth 0 Off 2 12 Pings VD 001 000 000 Data Out Vel Cor Amp PG Ldr P0 P1 P2 P3 VM 3 Surface Track Mode 1 Amp 2 NA 3 Auto 4 Shal 5 Deep VN 128 Number of depth cells 1 128 VP 00010 Pings per Ensemble 0 16384 VS 0005 Depth Cell Size cm VX 0000 Transmit Length cm 0 Bin Length WC 080 Correlation Thr...

Страница 86: ...entifier The first letter identifies the command group see Table C 26 The second letter identifies the command function If a numeric value fol lows the identifiers the ADFM uses it to set a processing value time range percentage processing flags All measurement values are in metric units mm cm dm Table C 2 ADFM Command Groups First Letter Command Group C CONTROL Commands E ENVIRONMENTAL SENSORS Co...

Страница 87: ...e command enter the command followed by a question mark For example to view the WS command setting enter WS Break Purpose Interrupts ADFM without erasing current settings Format BREAK Description A BREAK signal interrupts ADFM processing It is leading edge triggered and must last at least 100 ms A BREAK ini tializes the system sends a wake up copyright message and places the ADFM in the DATA I O m...

Страница 88: ...our external device dumb terminal com puter software MUST use the same communication parame ters to talk to each other After you enter valid CB parame ters the ADFM responds with a prompt You may now change the external device s communication parameters to match the ADFM parameters before sending another com mand Baud Rate Parity Stop Bits 0 Default 9600 0 Default None 0 Default 1 Bit 1 1200 1 Non...

Страница 89: ...its for a new command CFx1xxx Automatic Ping Cycling Pings immediately when ready CFx0xxx Manual Ping Cycling Sends a character to signal ready to ping and then waits to receive an Enter before pinging The Enter sent to the ADFM is not echoed This feature lets you manually control ping timing within the ensemble CFxx1xx Binary Data Output Sends the ensemble in binary format CFxx0xx HexAscii Data O...

Страница 90: ...ep Whenever the unit tries to sleep it will instead wait in a non power saving state CN Site Number Purpose Identifies the ADFM site number Format CNaaaaaaaa Range 8 character string Description An 8 character string identifying the ADFM CP Clear BIT Log Purpose Clears the BIT Log stored in EEPROM on the MainBoard Format CP Description Clears the BIT Log stored in EEPROM on the MainBoard The log i...

Страница 91: ...llecting data as pro grammed by the other commands If the TF command is set time of first ping the ADFM waits until it reaches the TF time before beginning the data collection cycle If you try to record data CFxxxx1 and data already exist on the recorder or the recorder is erasing the ADFM will not start pinging and will return a RECORDER NOT READY message Recorder Playback This command also plays...

Страница 92: ...s a low voltage condition for five consecutive ensem bles the ADFM will shutdown The recommended shutoff voltage level for alkaline batteries is 12 volts and 20 volts for lead acid batteries CZ Power Down ADFM Purpose Tells the ADFM to power down Format CZ Description An ESC interrupts ADFM processing and returns it to the STANDBY mode An ESC does not remove the settings stored in battery backed R...

Страница 93: ...rth coordinates EC Speed Of Sound Purpose Sets the speed of sound value used for ADFM data processing Format ECnnnn Range nnnn 1400 1600 meters per second Description EC sets the sound speed value used by the ADFM to scale ve locity data depth cell size and range to the surface The ADFM assumes the speed of sound reading is taken at the transducer head ED Depth Of Transducer Purpose Sets the ADFM ...

Страница 94: ... x1xxxxx EO Secondary Depth Zero Offset Purpose Sets the secondary depth zero offset in the ADFM Format EOnnnn Range 8 to 9999 mm Default EO0008 Description The secondary depth zero offset determines the distance above the bottom of the channel at which the secondary depth sensor is placed The default setting of 8 mm is half the diameter of the recommended secondary sensor ER Secondary Depth Span ...

Страница 95: ...tion ET sets the temperature value of the water The ADFM uses ET in its speed of sound calculations The ADFM assumes the speed of sound reading is taken at the transducer head Example Convert temperatures of 14 C and 3 5 C to ET command values ET 14 00 100 1400 ET1400 is understood ET 3 50 100 350 ET 0350 EX Coord Transform Purpose Sets the coordinate transformation processing flags Format EXnnnnn...

Страница 96: ...solutions if one beam is below the correlation threshold set by WC EXxxxx1 Allow bin mapping Notes 1 For ship and earth coordinate transformations to work properly you must set HEADING ALIGNMENT EA cor rectly You also must ensure that the tilt and heading sensors are active EZ 2 Setting EX bit 3 Use Tilts to 1 lets you collect tilt data without using it in the ship or earth coordinate transforma t...

Страница 97: ...ilable the ADFM defaults to the manual E command setting The following table shows how to interpret the sensor source switch settings Table C 5 Sensor Source Switch Settings Field Value 0 Value 1 Value 2 c Manual EC Calculate using ED ES and ET N A d Vertical beam only Vertical beam and secondary depth sensor N A h Manual EH Heading N A p Manual EP Pitch Tilt 1 N A r Manual ER Roll Tilt 2 N A s Ma...

Страница 98: ...m to disable its internal speaker and the second command W0 causes the currently active internal Modem parameters to be saved in non volatile memory internal to the Modem so that the speaker will remain disabled between power ups The AT at the beginning of the command string stands for Attention and is required by the Modem to pre cede any command except for additional commands in the same command...

Страница 99: ...cle time that determines when and how often the ADFM will wake up to check to see if it is time to call the host In order for this mechanism to work properly the time between ensembles TE plus the time required for the ping must be less than the dial out interval MI The dial out interval defaults to one day 86400 seconds at cold power up i e not wakeup from sleep mode Once set to a new value it do...

Страница 100: ...m is on and in command mode and function ing well it will respond with an OK message to the ADFM The ADFM will then display a message indicating that the Modem is okay If the Modem is on line when this command is given i e it is connected to the host the ADFM will report that the Modem is ON LINE Otherwise the ADFM will re port that the Modem is not okay and may indicate a failure e g Modem is tur...

Страница 101: ...the operator connected to the RS 232 interface a direct connection to the Modem and is just like talking to a local Modem from a PC The operator can give any valid AT commands and see all responses from the Mo dem including dialing out and communicating with a host This command is normally only used for troubleshooting and is disabled if given remotely over the Modem interface MZ Modem Reset Purpo...

Страница 102: ...active Built In Tests PA0 Help PA1 Sensor Data pa1 Press any key to quit sensor display Transducer Temp Depth mm 21 47øC 0 21 47øC 0 21 47øC 0 21 47øC 0 21 47øC 0 21 47øC 0 21 47øC 0 21 47øC 0 PC Diagnostic Tests Purpose Sends displays results of a series of ADFM system diagnostic tests Format PC Description These diagnostic tests check the major ADFM modules and signal paths We recommend you run ...

Страница 103: ...pecial application data structure or a fixed data set for transmis sion display as the data ensemble Table C 6 Data Stream Selections Format Description PD0 Sends The real water current data set PD1 Sends an RDI defined data set that always uses the same data except for parts of the leader data This data set is useful during user software development PD2 Not used PD3 Sends reduced discharge output...

Страница 104: ...al Time Clock Test PIxxx1xx Run Timing Generator RAM Test PIxxxx1x Run Receiver RAM Test PIxxxxx1 Run the Electronics End To End Test this test takes a timing generator test signal and feeds it to the receiver input it compares the result with pre determined values This test does not test the transducer electronics Example pi BEGIN Built In Tests CPU RAM Test PASS Realtime Clock Test PASS Timing C...

Страница 105: ...ed PT Built In Tests Purpose Sends displays result of the ADFM system diagnostic tests Format PTnnn Range Firmware switches see description Description These diagnostic tests check the major ADFM modules and signal paths Most of the tests give their final results in the format xxxxxxxxxx TEST RESULTS hhhh rrrr Where xxxxxxxxxx Module or path being tested hhhh Hexadecimal result code 0 pass see ind...

Страница 106: ... 1 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PT0 Help Purpose Displays the test menu shown below Format PT0 Description As implied by the NOTE adding 100 to the test number re peats the test continually until the ADFM receives a BREAK Sending PT200 runs all tests PT300 runs all tests continually until the ADFM receives a BREAK pt0 Built In Tests PT0 Help PT1 Board Level Receive Test PT2 Ancillary ...

Страница 107: ...see the correlation magnitude get smaller quickly toward larger Lags High correlation values at larger Lags may indicate interference Part 2 The ADCP compares the RSSI value at high gain vs low gain This is not applicable to the ADFM However the recorded RSSI value is applicable and is compared to a fac tory threshold High RSSI levels may also indicate interfer ence Part 3 The ADFM displays the De...

Страница 108: ...e result for a particular beam most significant nibble beam 1 least significant nibble beam 4 In this example we only describe which bit is set for beam 4 for a given failure type This test has three parts Part 1 The ADFM pings without transmitting and displays the result of an auto correlation function performed over 0 to 7 Lag periods Ideally we should see high correlation at near zero lags and ...

Страница 109: ...ation at lag 1 is 70 130 counts for beams 4 3 2 1 1 5 9 13 High Correlation A correlation at lag 11 or above is 63 counts for beams 4 3 2 1 2 6 10 14 High Noise Floor Noise floor for high gain is 59 for beams 4 3 2 1 3 7 11 15 Low Differential Gain not applicable to the ADFM PT4 Transmit Path Purpose This test displays transmit path characteristics Format PT4 Description During the test the ADFM p...

Страница 110: ...ted The contents of the Timing Generator s registers is corrupted 4 Overcurrent Shutdown 5 Overtemperture Shutdown Not applicable to the ADFM 6 Incorrect Transducer Impedance Could be caused by a short or an open connection in the transmit circuit including the transducer 7 Low Transmit Voltage And Or Current The transmit voltage and or the transmit current was to low PT5 Electronics Wrap Around P...

Страница 111: ...pose This test measure the receive bandwidth of the system Format PT6 Description This test measure the receive bandwidth of the system The bandwidth varies with system frequency and the WB com mand setting Beam fails if 75 or 125 of nominal value Example pt6 Receive Bandwidth Narrow Sample bw rate expect Bm1 Bm2 Bm3 Bm4 Bm5 307200 45 31 36 34 35 26 Khz results PASS PASS PASS PASS PASS Receive Ban...

Страница 112: ...res it to an internally stored checksum written during the flash download process If the two are different the firm ware has become corrupted and should be downloaded again The same is done to the embedded Correlation and ArcTan lookup tables The tables can also be downloaded again if they have become corrupted Example pt8 Calculated Flash Checksum C5B6 Flash Checksum PASS Table Checksum PASS page...

Страница 113: ...efault QC000 Description Use this command to set the pipe or channel type between rec tangular or circular QD Algorithm Select Purpose This command turns on or off various methods used to calcu late the flow rate Format QDabc def ghi Range Firmware switches see description Default QD100 011 110 Description See table below for descriptions Switch Description a Qmain Do other selected algorithms ord...

Страница 114: ...l a3 a2 a1 R1 R2 R2 R3 Circular or Egged shaped R Radii in meters a Angles in degrees W3 W2 W1 H3 H2 H1 Rectangular and Trapezoidal shaped H Heights in meters W Widths in meters y z x Figure C 1 Pipe Heights Epsilons QO Transducer Offset from Pipe Bottom Purpose Sets the transducer offset from the pipe or channel bottom Format QO nnnn Range nnnn 50 to 2000 mm Default QO 0000 Description If the tra...

Страница 115: ...ways Default QR006 Description If PD3 is selected a PD0 ensemble is output for ensemble 1 followed by several reduced discharge format ensembles When the ensemble is evenly divided by QR a full PD0 en semble is output Example PD 3 QR 4 Ensemble output order FE RD RD FE RD RD RD FE RD RD RD FE where FE Full Ensem ble and RD is a reduced discharge output ensemble QU Channel Geometry Units Purpose Se...

Страница 116: ...nnn Range nnnn 0 to 9999 Default QW0100 0100 0100 Description Use this command to describe the width radii values of the pipe or channel see Figure C 134 QZ Zero Discharge Accumulation Purpose Zeros the discharge accumulation Format QZ Description Zeros the discharge accumulation page C 36 MGD Technologies Inc ...

Страница 117: ...e number of the deployment you want to retrieve There may be a slight delay before the prompt returns because the ADFM is loading its buffer with the first ensemble k Send the CS command Data ensembles for the selected deployment will be output from the ADFM as if it were pinging RA Number Of Deployments Recorded Purpose Lists the number of deployments recorded on the data re corder Format RA Desc...

Страница 118: ... 18 36 MB 2 MB 18 located in slot J16 both need further erasure NOTE If there are boards missing from the UV EPROM recorder then the order in which mem ory is checked is sequential slot J0 to slot J19 In PCMCIA recorders RB0 shows the first x MB used where x MB used per RS command Remaining MB fields are blank Example 2 Different RBnnn values display the results for the selected megabyte RB5 Megab...

Страница 119: ... Recorder Purpose Erases initializes recorder memory Format RE ErAsE Description RE ErAsE erases all memory on Intel recorder board s or re sets the directory in PCMCIA recorders i e no physical era sure of data This command IS case sensitive The RE erase sequence looks like this Example RE ErAsE ERASING While the recorder is erasing the RS command displays 999 999 as its parameters It takes just ...

Страница 120: ...8 10 Jumped 10 CS Data for ensemble 48 shown here CS Data for ensemble 49 shown here RJ 0 REPEAT LAST ENSEMBLE Jumped 0 CS Data for ensemble 49 shown again RJ 999 IN EFFECT JUMP TO BEGINNING Jumped 48 BECAUSE ENTRY EXCEEDED DEPLOYMENT BOUNDARY CS Data for ensemble 1 shown here If the ADFM is in BINARY mode CFxx1xx RJ returns a message of seven binary bytes where Byte 1 05h size of message not incl...

Страница 121: ...ons are done on free areas of the recorder This test writes to and verifies low and high recorder RAM detects the number of recorder cards installed determines the total recorder mem ory capacity tests write read block copy operations This test takes less than 30 seconds to run The format and output dis play are as follows Example 2 Destructive test This test fills all recorder memory space with a...

Страница 122: ...s of the recorder via the serial interface to a host computer using the standard YMODEM protocol for binary file transfer Any communications pro gram that uses the YMODEM protocol may be used to upload the recorder data The data is transferred to the host and stored as DOS files This command may be used to recover deployment data without opening the electronics housing page C 42 MGD Technologies I...

Страница 123: ...F Time Of First Ping Purpose Sets the time the ADFM wakes up to start data collection Format TFyymmddhhmmssff Range yy 00 99 years mm 01 12 month dd 01 31 day leap years ARE accounted for hh 00 23 hour mm 00 59 minute ss 00 59 second ff 00 99 hundredths of seconds Description TF delays the start of data collection This lets you deploy the ADFM in STANDBY mode and have it automatically start data c...

Страница 124: ...Ping Purpose Sets the minimum time between pings Format TPmm ss hh Range mm 00 59 minute ss 00 59 second ff 00 99 hundredths of seconds Default TP00 00 00 Description The ADFM interleaves individual pings within a group so they are evenly spread throughout the ensemble During the ensemble interval set by TE the ADFM transmits the number of pings set by the WP command TP determines the spacing betw...

Страница 125: ...me clock Example TS941123131500 sets the real time clock to 1 15 00 pm No vember 23 1994 When the ADFM receives the carriage return after the TS command it enters the new time into the real time clock and sets hundredths of seconds to zero The internal clock does ac count for leap years If the entry is not valid the ADFM sends an error message and does not update the real time clock ADFM Technical...

Страница 126: ...000 000 Description VD uses firmware switches to tell the ADFM the types of data to collect The ADFM always collects header data fixed variable leader data and checksum data Example VDxx1 xxx xxx collect Amplitude Switch data VDxxx 1xx xxx collect vertical beam Variable Leader data VM Surface Track Mode Purpose Sets the ADFM Surface Tracking Mode Format VMn Range n 1 to 5 1 Amp 2 NA 3 Auto 4 Shall...

Страница 127: ...ble Format VPnnnnn Range nnnnn 0 to 16384 pings Default VP00010 Description VP sets the number of vertical beam pings to average in each ensemble before sending recording the water track data VS Vertical Beam Depth Cell Size Purpose Selects the volume of water for one measurement cell for the vertical beam Format VSnnnn Range nnnn 0 to 9999 cm Description The ADFM collects data over a variable num...

Страница 128: ...nto the ensemble WD WT Data Out Purpose Selects the data types collected by the ADFM Format WDnnn n00 000 Range Firmware switches see example Description WD uses firmware switches to tell the ADFM the types of data to collect The ADFM always collects header data fixed variable leader data and checksum data Example WD1xx xxx xxx collect velocity data WDx1x xxx xxx collect correlation magnitude data...

Страница 129: ...w that reduces un wanted data in the ensemble WG Percent Good Minimum Purpose Sets a good data qualifier for water track data Format WGnnn Range nnn 1 to 100 Default WG025 Description WG sets the minimum percentage of water track pings that must be good in an ensemble before the ADFM flags the data as good If the percentage of water track pings that are good in an ensemble is below WG the ADFM fla...

Страница 130: ...ot zero all water profiling and vertical pings come from the same ceramic transducer WP WT Pings Per Ensemble Purpose Sets the number of pings to average in each data ensemble Format WPnnnnn Range nnnnn 0 to 16384 pings Description WP sets the number of water track pings to average in each ensemble before sending recording the water track data WS WT Depth Cell Size Purpose Selects the volume of wa...

Страница 131: ...ion of profiling Mode 4 WM4 Format WVnnn Range nnn 020 to 999 cm s Description Set WV as low as possible to attain maximum performance but not too low or ambiguity errors will occur Rule of thumb Set WV to the maximum relative horizontal velocity between water current speed and ADFM speed ADFM Technical Manual January 2000 page C 51 ...

Страница 132: ...Appendix C NOTES page C 52 MGD Technologies Inc ...

Страница 133: ... pressurized and in service Installation of the HTI transducer is accomplished through an industry standard two inch tap through the pipe wall The ADFM HTI transducer uses the standard ADFM electronics for data collection and storage For the customer already familiar with the standard ADFM system any differences between the two systems are transparent The ADFM HTI flow monitoring system operates e...

Страница 134: ...transition from the valve assembly to the HTI fitting and to ensure adequate clearance between the valve and the mounting as sembly for the sensor head Installation and operation of the ADFM Hot Tap insertion transducer can be divided into two basic functions The two basic functions are 1 Physical installation of the transducer 2 ADFM HTI system setup and testing D 4 1 Physical Installation Physic...

Страница 135: ...he female mount ing fitting on the HTI transducer Teflon tape or other sealant must be used in all threaded connections to ensure watertight operation All threaded connections MUST be securely tightened before proceeding with the instal lation Once the transducer is physically attached to the tapping assembly the valve or corporation stop can be opened CAUTION Keep all body parts clear of the HTI ...

Страница 136: ...housing with the longitudinal axis of the pipe 3 75 minimum clearance required to retract transducer head for installation removal PIPE INTERIOR WALL 1 8 INCH PIPE TAP ASSEMBLY TRANSDUCER HEAD 2 INCH DIAMETER TAP IN PIPE WALL Figure D 2 Physical Installation page D 4 MGD Technologies Inc ...

Страница 137: ...TE The specifications and dimensions listed in this section are subject to change without notice D 5 1 Physical Specifications STD 1 2 STAINLESS STEEL PIPE OPTIONAL NIPPLE CONNECTS TO STD 2 GATE VALVE 710 4025 00 CLAMP SEAL ASSY HGS CONNECTS TO MAIN ELECTRONICS TRANSDUCER PCA HOUSING 24 STANDARD CAN BE SIZED TO APPLICATION 5 BEAM ONE VERTICAL 1200 kHz TRANSDUCER 1 3750 3 514 Figure D 3 Outline Ins...

Страница 138: ...0 ft standard 15 m up to 150 ft 45 m optional Minimum Bend Radius 0 5 ft 15 cm Weight 0 08 lb ft 120 gm m nominal Outer Diameter 0 5 in 1 3 cm nominal Acoustic Frequency Frequency 1 23 MHz D 5 3 Performance Specifications Flow Accuracy 2 of reading Velocity Horizontal Velocity Range 30 0 ft s 9 m s Velocity Bin Size 2 to 12 in 5 to 30 cm s user selectable Vertical Profiling Range 0 75 to 20 ft 0 2...

Страница 139: ... grammable controller module an LCD display panel and one or more ana log signal generator modules housed in a NEMA 4X enclosure The con troller module used is the Parallax BASIC Stamp IISX BS2 based on the Scenix SX micro controller As the name implies the BS2 is programmed using the Parallax PBASIC2 variant of the BASIC programming language Operation of the unit is controlled by the loaded BS2 p...

Страница 140: ...erning each of these func tions are covered in detail in the following sections The five basic func tions are a Physical installation of enclosure and components b Connect wiring to ADFM power supply and external devices c Setup and calibrate the DGH Modules d Program the micro controller configure switches e Verify output scaling and confirm system operation Two versions of the printed circuit bo...

Страница 141: ...s possible within the lim its of the RS 232 communications protocol Specifications for the RS 232 protocol limit the cable length to a distance of 25 feet but substantially longer cables have been applied successfully in some applications A minimum clearance of two inches 50mm should be provided on the top and both sides of the module s enclosure with the minimum clearance in creased to six inches...

Страница 142: ...and lift the circuit board slightly When all six standoffs are freed the circuit board can be lifted free of the standoffs f Disconnect field wiring as required It may also be necessary to dis connect the external communications connector J1 and the ADFM communications cable g Remove the six 6 screws securing the circuit board mounting bracket to the enclosure E 2 4 Wiring Connections Wiring conne...

Страница 143: ...d is pre installed on the printed circuit board for Rev B systems E 2 5 Field Wiring Power Supply Field wiring to the ADFM Analog Output Module is connected to the ter minal block marked TB2 Each position within TB2 is marked with its function rather than a terminal number for ease of connection in the field The only required connections are to the DC power supply terminals marked DC and DC For fu...

Страница 144: ...ble as either 5vdc pulses P5 P5 or as dry contact closures NO Comm The 5vdc pulse if used can source a maximum current of 15 mA NOTE Rev A Dry contact closures are provided by a dry reed relay rated for 200 million closures with a maximum switching loads of 10 va 100 volts and or 0 50 amps Rev B Dry contact closures are provided by a solid state relay rated 3 60 vDC 0 02 1 0 amps E 3 Setup and Cal...

Страница 145: ...stablished a com munications timeout error message will appear followed by the same setup window NOTE You will not be able to successfully change the setup of the DGH module until you have successfully es tablished communications with the DGH module e Enter revised parameters in the setup window as desired Limit checking will typically be turned on and high and low limits will typically be set to ...

Страница 146: ...can then be programmed with the appropriate operating parameters Refer to the D3000 D4000 Users Manual or consult MGD Technologies Inc for more information E 3 2 Current Loop Calibration Calibration of the output from any DGH module can easily be accom plished using the DGH software and a calibrated ammeter no calibration potentiometers or other hardware adjustments are required The calibration pr...

Страница 147: ...e ADFM Analog Output Module is the Parallax Basic Stamp IISX BS2 This micro controller is programmed is the Parallax PBASIC2 variant of the BASIC programming language Operation of the module is controlled by the loaded BS2 program code and in circuit reprogramming can be accomplished at any time Additional in formation on the BS2 micro controller can be obtained from the Parallax web site www para...

Страница 148: ...ived bad or missing data When the number of consecutive bad or missing readings reaches or exceeds a specified threshold the out put s are set to a user specified level for warning and diagnostic purposes NOTE Customized programming can be used to change the error handling procedures and or the data shown on the local display Please consult any system specific documentation or contact MGD Technolo...

Страница 149: ...tches on the circuit board This switch bank is labeled SW2 Individual switch functions are as follows Table E 2 ADFM420 Module Configuration Switch Function Settings SW2 1 Enables micro controller programming Rev B only 0 disabled 1 enabled SW2 2 Force default mode in DGH modules Rev B only 0 normal 1 default SW2 3 Isolate micro controller from ADFM data stream 0 isolated 1 connected SW2 4 Isolate...

Страница 150: ...iguration Check position of switch SW2 2 Rev B only Check position of switch SW2 3 Check position of switch SW2 4 5 and 6 Check field wiring termination s at TB2 DGH signal generator module failure Test communications with DGH module s restart computer in MS DOS mode if necessary Check set parameters and calibration of DGH module s Test DGH module s output using software RS 232 communications lost...

Страница 151: ...Module s display and analog output s Review raw ADFM data for possible cause s Contact MGD Technologies Inc Data reduction errors in ADFM Analog Output Module or in the ADFM Contact MGD Technologies Inc Table E 5 Symptom Noisy or Erratic Output Readings Possible Cause s Test Corrective Action s Normal fluctuations in flows None Hydraulic influence from upstream or downstream facilities None Limits...

Страница 152: ...Appendix E NOTES page E 14 MGD Technologies Inc ...

Страница 153: ...ed from Teledyne Isco The warrantor is Teledyne Isco Inc 4700 Superior Lincoln NE 68504 U S A This warranty applies to the USA and countries where Teledyne Isco Inc does not have an authorized dealer Customers in countries outside the USA where Teledyne Isco has an authorized dealer should contact their Teledyne Isco dealer for warranty service In the event of instrument problems always contact th...

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