WORKHORSE (WHADCP) FREQUENTLY ASKED QUESTIONS (FAQ) As of: 01MAR98 Best viewed/printed with a fixed font such as Courier 10 point. ---------1---------2---------3---------4---------5---------6----- Workhorse System Frequently Asked Questions (responses follow) ----------------------------------------------------------------- 1. What are Battery-Saver and Deployment-Saver modes? 2. Does the ping beeper drain the batteries? 3. Can I disable the ping beeper? (REVISED 01NOV97) 4. Can I control the interval between pings myself? 5. Why do Sentinels need degaussed batteries? 6. How close can I put an external battery case to the compass? 7. What do I need to calibrate the compass? 8. Can the Workhorse output beam-coordinate data? 9. What is the difference between Workhorse binary data and Broadband binary data? 10. Can I use Broadband software on a Workhorse or vice versa? 11. Does Workhorse software work in Windows 95? 12. What memory cards work in the Workhorse? 13. Can I put memory cards in a Workhorse Monitor? 14. When using PLAN (or WHPLAN) to set up for a deployment, I find that I do not have access to all commands. How can I enter some special commands that I need for my deployment? 15. Can I connect an external battery pack without modifying the Workhorse? 16. Can I use antifouling paint? 17. Is the Workhorse as susceptible to barnacles as earlier ADCPs? 18. What happens if two ADCPs are placed back-to-back, one looking up and one looking down; will they interfere with each another? 19. Can I use the ADCP's backscatter data to find the sea surface? 20. How tight should I fasten the transducer head bolts and the end-cap bolts on the Workhorse and DR/SC-BBADCP systems? 21. Does RDI have any programs that run in a Windows environment? 22. What is the accuracy of the heading, pitch, and roll sensors installed in Workhorse ADCPs? 23. When installing RDI software, why do I get the error message "Not enough environment space"? 24. What are the internal ADCP thresholds that exclude informa- tion from the Workhorse Monitor and Sentinel data output streams? 25. How do I change the baud rate in a Workhorse ADCP? 26. Can I calculate Absolute Backscatter using the Workhorse? 27. How can I test a system for interference with another sensor? 28. When I use the Workhorse DEPLOY batch file it says, "ADCP is now pinging," but I entered a FIRST PING DATE and TIME, and the ADCP should not start pinging until that time is reached. Is my Workhorse ADCP actually pinging? 29. Do you have any information on using backscatter as a measure of turbidity? 30. Can I use TRANSECT with my Workhorse ADCP? If so, how? 31. I collect data in an area where salinity is more than 40 ppt. This exceeds the WHADCP limit. This will affect the speed of sound calculation. How do I compensate? 32. What is "ringing," and what do I do about it? 33. Regarding battery capacities, what are the lower operating voltage limits at which the ADCP will operate satisfactorily? 34. How can I do a manual unconditional data dump of my WHADCP recorder board? 35. How can I do a manual data dump of a specific file on my WHADCP recorder board? 36. Can you give some recommendations for the Depth Cell Size and Blank After Transmit settings for workhorse systems? 37. What is the typical battery capacity for a fresh Workhorse battery pack? 38. In TRANSECT, the menus display "garbage" characters. What can I do? Workhorse System Frequently Asked Questions and Responses ----------------------------------------------------------------- 1. What are Battery-Saver and Deployment-Saver modes? Battery-Saver Mode: If the ADCP is left in command mode for more than 5 minutes, it will turn itself off and go to sleep to save the battery. Deployment-Saver Mode: If the ADCP is interrupted while collecting data, it will automatically resume data collection (with its setup unchanged). If the interruption is a break that is not followed by a legitimate command, it will resume after waiting 5 minutes. If it is interrupted by removing and replacing the battery pack, it will immediately resume (this means that if it is planning to do its next ping in the future, it will go to sleep and wake up normally when it is time to collect the next ping). 2. Does the ping beeper drain the batteries? No - The battery drain from the beeper is insignificant. 3. Can I disable the ping beeper (REVISED 01NOV97)? Yes - Short together test points TP22 and TP23 at the edge of the DSP board. (NOT TP35 to TP36 as previously listed!!) 4. Can I control the interval between pings myself? Yes, but not with the standard Workhorse software. You can change the ping interval (or other parameters) by manually editing the Deployment Planning File created by PLAN. Procedures for doing this are in the Workhorse ADCP Technical Manual. PLAN automatically sets the maximum possible ping interval to spread the pings out through the ensemble interval. This nearly always gives you the best possible data quality. 5. Why do Sentinels need degaussed batteries? Alkaline batteries have a magnetic signature (mainly from the nickel content of the metal cases). To keep the compass within specifications, the battery pack must be degaussed and the compass must be calibrated (using the standard, built-in field calibration procedure). We could have lengthened the pressure case to avoid the need for degaussing, but we felt that the instrument would be too big. 6. How close can I put an external battery case to the compass? We recommend a separation of at least 30 cm. 7. What do I need to calibrate the compass? You need a non-magnetic table and a personal computer or terminal to talk to the ADCP. 8. Can the Workhorse output beam-coordinate data? Yes, but we do not recommend it. Each Workhorse uses its own beam calibration matrix to correct data for beam pointing errors (e.g., if the beams erroneously point toward 21 deg. instead of 20 deg.). Correction is applied when the data are converted from beam coordinates to earth coordinates. If you output beam-coordinate data, you will need to apply the beam corrections yourself if you want the best possible data. RDI has no software that uses the beam calibration matrix to correct data in a personal computer. 9. What is the difference between Workhorse binary data and Broadband binary data? There is no difference. 10. Can I use Broadband software on a Workhorse or vice versa? The following table shows software compatibility: SOFTWARE SYSTEM -------- ------ BBSC BB only BBTEST BB only BBLIST BB and WH BBTALK BB and WH PLAYBACK BB and WH TRANSECT BB (and WH without bottom-track) WATCH BB and WH PLAN WH only DEPLOY WH only STARTUP WH only RECOVER WH only 11. Does Workhorse software work in Windows 95? It should work. If not, click "Shut Down...", then "Restart the computer in MS-DOS mode". You can also press the F8 function key during boot-up; this will display a menu that lets you start the computer in MS-DOS mode. If you still have problems, remove (actually, rename) your computer's AUTO- EXEC.BAT and CONFIG.SYS files. This forces Windows 95 to use use default values and also removes other programs that may be interfering with Workhorse software operation. Inter- national users should load the appropriate keyboard driver (e.g., those in Italy would run KEYB IT). 12. What memory cards work in the Workhorse? We use PCMCIA/ATA, type 2 memory cards made by SANDISK (old name was SUNDISK)--they must be formatted first. Others may work too, but the ones we have tried have not worked. You can use 10, 20, or 40-MB cards. The Workhorse can hold one or two cards. 13. Can I put memory cards in a Workhorse Monitor? The Workhorse Monitor comes with no memory cards, but has the same capacity for memory cards as a Sentinel. 14. When using PLAN (or WHPLAN) to set up for a deployment, I find that I do not have access to all commands. How can I enter some special commands that I need for my deployment? If you need to change or add a command for which you are not given an option in PLAN, do the following. (1) Set those commands for which you have options using PLAN, (2) Save your settings to a *.cmd file, (3) Using any plain-text editor, change the *.cmd file as needed for your desired settings and save the file, (4) Do NOT go back into PLAN after making the changes to your *.cmd file, or PLAN will change your settings back. NOTE: Before you manually change any command, make sure you understand what the command setting will do. 15. Can I connect an external battery pack without modifying the Workhorse? Yes. 16. Can I use antifouling paint? Yes - Apply it thinly and smoothly. We are not aware of any antifouling material that attacks the Workhorse plastics. 17. Is the Workhorse as susceptible to barnacles as earlier ADCPs? The Workhorse should resist barnacles far better than earlier ADCPs because the urethane on Workhorse transducers is many times harder. It is almost as hard as the plastic on a golf ball. Time will tell, but we expect barnacles to cause fewer problems with these systems. 18. What happens if two ADCPs are placed back-to-back, one looking up and one looking down; will they interfere with each another? We are not sure, but we expect interference to be minimal. On the plus side, the narrow beams are highly directional and substantially attenuate signals outside the beams. On the minus side, the beams are highly sensitive because they have to listen for signals from distant profiling ranges that are just above the background noise. Even if transmission from one ADCP interferes with reception in another, the typical duty cycle minimizes the effects of interference. Consider a typical situation in which the ADCP transmits 4-m pulses and pings every 10 seconds. If transmit times are random, the chances of a given bin being interfered with are about 1/1000 (given a 6-ms duration for the 4-m pulse). Given that interfering pulses tend to bias data toward zero, the result is an average velocity reduction of about 0.1%. To avoid consistent biases in a single bin, you should set the ping interval of the two ADCPs to different values. 19. Can I use the ADCP's backscatter data to find the sea surface? Yes - Use the program SURFACE.EXE, available at our FTP site (ftp://ftp.cts.com/pub/rdifs/software/surface!.exe). SURFACE works as long as the surface is within the range of the ADCP, and the length of the profile extends at least one bin beyond the surface. 20. How tight should I fasten the transducer head bolts and the end-cap bolts on the Workhorse and DR/SC-BBADCP systems? The recommended torque values are: BOLT TORQUE VALUES IN BOLT LOCATION SIZE NEWTON-METERS POUND-INCHES --------------- ---- ------------- ------------ Transducer Head 8 mm 9.6 85 End-Cap 6 mm 5.6 50 Maintaining the proper torque value on these bolts is vital to maintaining the water-tight integrity of the instrument. 21. Does RDI have any programs that run in a Windows environment? This is a tough one to answer. While some of our programs DO work with the Microsoft Windows environment, none of them were specifically designed that way. As an example, although some people have been able to run Transect in a window, you must remember this is a DOS-based program. This is why it can behave erratically when run in Windows. As it stands now, Transect will NOT run in the background. In fact, to ensure the software runs properly, you really must have a computer dedicated to the ADCP when it is collecting data. In other words, there is no guarantee that multi-tasking will work with any of RDI's available software. That's the bad news. The good news is that we are in the process of writing Windows-based software. As yet, we have no firm schedule for when this work will be completed. We will keep you informed through the newsletter and web site. 22. What is the accuracy of the heading, pitch, and roll sensors installed in Workhorse ADCPs? HEADING (Mfr = RDI; System = WH): The WH ADCPs use a compass made by RDI. The heading is accurate (after field calibration) to +/-1 degree over the temperature range of -5 to +45 degrees C, with a horizontal magnetic field strength of no less than 10,000 nT and a total magnetic field strength less than 90,000 nT, and a tilt of +/-20 degrees. RDI recommends a maximum tilt of +/-20 degrees. TILT SENSOR (Compass type = RDI; System = WH): The WH ADCPs use a tilt sensor made by RDI. The tilt can output values up to +/-45 degrees. The tilt has an accuracy of +/-2 degrees over the entire +/-45 degrees. RDI recommends a maximum tilt of +/-20 degrees. 23. When installing RDI software, why do I get the error message "Not enough environment space"? Some computers (mainly computers with Windows 95 installed) do not have enough environment space set aside (usually done through the CONFIG.SYS or AUTOEXEC.BAT files). To get the install routine to work, do the following. a. At the DOS prompt type, COMMAND /E:2048 b. Install the software as normal (i.e.; switch to the floppy drive and type INSTALL C:\dirname. c. After installing the software, type EXIT at the prompt. The computer is returned to the initial conditions. 24. What are the internal ADCP thresholds that exclude informa- tion from the Workhorse Monitor and Sentinel data output streams? Data Type Cmd Default Setting --------- --- --------------- Error Velocity WE WE1000 = 1000 mm/s Fish Rejection WA WA25 = 50 echo intensity counts Correlation WC WC064 = 64 correlation counts RDI recommends that you never change the settings for Correlation Threshold (WC-command). You can set all other commands. However, take care when adjusting Error Velocity (WE) and Fish Rejection (WA). A setting that is too low will exclude data that really is valid. For more details, see the Technical Manual. 25. How do I change the baud rate in a Workhorse ADCP? The Workhorse can communicate at baud rates from 1200 to 115200. The factory default is 9600. The baud rate is con- trolled via the CB-command. The following procedure explains how to set and save the baud rate in a Workhorse. We assume you will use our BBTALK program to "talk" to the ADCP. a. Connect the ADCP to your computer and apply power. b. Start BBTALK. Wake up the ADCP by sending a BREAK signal with the key. c. Send "CR1" to load the ADCP's factory default settings. d. Send the appropriate CB command to select the baud rate you wish. Here are the most common baud rate settings using no parity and 1 stop bit. BAUD RATE CB Command 1200 CB111 2400 CB211 4800 CB311 9600 CB411 19200 CB511 38400 CB611 57600 CB711 115200 CB811 e. Press the function key to open the BBTALK communica- tion port setup window. Change the communication port settings to match the new CB command setting. f. Press to exit the communication port setup window. g. Send "CK" to save the new baud rate setting. h. The ADCP is now set to use the new baud rate. The baud rate will stay at this setting until you change it with the CB-command or until you press the reset button on the CPU board. 26. Can I calculate Absolute Backscatter using the Workhorse? No. At present, there is no way to compute the Absolute Back- scatter in Broadband or Workhorse systems. Unfortunately, we just do not have the manpower needed to make the measurements needed to provide the constants required for these calcula- tions. Our engineers do want to pursue this much-needed application, but there is no schedule for when we can accomplish it. 27. How can I test a system for interference with another sensor? To test for sensor interference: a. Place both the ADCP and the second device in the same "bucket" of water. Both systems OFF. b. Start the BBTALK program and establish communications with the ADCP (press the key). c. Send the following commands to the ADCP: CR1 (sets ADCP to factory defaults) CK (saves factory defaults) PT103 (runs our interference test continuously) d. You will see a new test run every five seconds. This test should say PASS. e. Turn ON the second device. f. If the ADCP interference test FAILS, the second device interferes. If the test continues to PASS, interference is not a problem. g. You can make a copy of the test results by pressing to capture data in BBTALK. If you have questions, you can fax or e-mail these results to RDI Field Service. 28. When I use the Workhorse DEPLOY batch file it says, "ADCP is now pinging," but I entered a FIRST PING DATE and TIME, and the ADCP should not start pinging until that time is reached. Is my Workhorse ADCP actually pinging? If you enter a FIRST PING DATE and TIME, the ADCP does not actually start pinging and collecting data until that time is reached. However, the DEPLOY batch file will always state "ADCP is now pinging" because it has been successfully placed in its "ping" mode. If no FIRST PING DATE and TIME have been entered, the ADCP will start pinging and collecting data immediately. 29. Do you have any information on using backscatter as a measure of turbidity? Here are a few references to papers and reports describing this process. a. "Technical Report DRP-92-7: Tylers Beach, Virginia, Dredged Material Plume Monitoring Project, 27 September to 4 October 1991". ed. by Michelle M. Thevenot, Terri L. Prickett, Nicholas C. Kraus. Order from NTIS in the U.S. at 703-487-4780 as ADA 261036 - $47.50. b. "Plumes Measurement System (Plumes calibration experiment)" Dredging Research Program Technical Report DRP-94-3, Aug. 1994 by Atle Lohrman and Craig Huhta. Order from NTIS in the U.S. at 703-487-4780 as NTIS ADA 284594 - $39. c. "Acoustic Measurements of Sediment Flux Through The Mersey Narrows - November 26, 1995 and January 10, 1996" by Dredging Research Limited. DRL is a commercial vendor of software for use with ADCPs to measure sediment concentration: Dredging Research Ltd., DRL Software Ltd. in Britain at 44-(0)1483-86731. d. "Estimation of Suspended Sediment Concentration Based on Single-Frequency Acoustic Doppler Profiling" by Jesper Weiergang at the Danish Hydraulic Institute in Horsholm Denmark. 30. Can I use TRANSECT with my Workhorse ADCP? If so, how? Yes, you can use the Broadband version of the TRANSECT program with a Workhorse (WH) ADCP. Here is how. a. PLAYING BACK WH DATA FILES IN TRANSECT TRANSECT Playback can be used to open, read, and display data files produced by the WHADCP. The data files created by the WHADCP can be read by TRANSECT when opened as a raw data file type. That is, when opening a WH data file using TRANSECT Playback: (1) Press the key to load a data file. (2) When the "Select file type to load" prompt appears, select "Raw data file." (3) Load the WH data file by name. Be sure to select the proper Velocity reference in Transect. For example, before (or after) loading your WH data file, select a velocity reference by pressing , then using the arrow keys, select NONE (Note: If you have WH data with ADCP bottom-tracking, select Bottom Track). (4) You can now use the regular Playback features. b. COLLECTING WH DATA WITH TRANSECT TRANSECT can also communicate with a WHADCP to collect data. You can connect, send commands, receive and record WH data - just like with other BBADCPs. Collecting GPS or External Digital Heading is also possible through TRANSECT whether using a WH or BBADCP. If you are using TRANSECT with a WHADCP with optional bottom-tracking, you will need to take the following additional steps: (1) Prepare for data collection with TRANSECT and the WHADCP as usual. Typically, this would include running the Communication, Calibration, and Planning menus. You should be at the point where you have a TRANSECT configuration file and are ready to Acquire. (2) Change the DIRECT COMMANDS section in your TRANSECT configuration file. You can use either the Planning - Expert Screen (Alt-M), or edit the configuration file using a text editor. In either case, you need to change the ADCP commands in the DIRECT COMMANDS section: (a) Remove the WM command. (b) Add the command WV352 (Note 1). (c) Check: BP8 (Note 2) and WP8 minimum (Note 3). (d) Add the EX11111 command (Note 4). (3) Now proceed to run TRANSECT as usual to collect data. Notes: 1. Use WV480 for boat+water velocities that are greater than 15 knots, or for very rough sea conditions. 2. Include the BP command only if you have optional bottom tracking in your WHADCP. 3. The number of water pings (WP) and the number of bottom pings (BP) should be 8 or more because the WHADCP pings faster than the BBADCP. 4. The EX command tells the ADCP to output earth-coordinate (East, North, Vertical, error) velocity data. If the EX command is already present, change it to EX11111. 31. I collect data in an area where salinity is more than 40 ppt. This exceeds the WHADCP limit. This will affect the speed of sound calculation. How do I compensate? The purpose of the salinity input is to calculate a speed of sound that is then used to correct ADCP velocity data. Unfortunately, there is no known speed of sound calculation for areas with salinity contents above 40 ppt. Therefore, we suggest you use a fixed speed of sound (limits: 1400-1600), and then correct the data manually during post-processing. The formula to use is: actual speed of sound true velocity = (velocity measured) * --------------------- speed of sound used To set up the WHADCP for a fixed speed of sound: a. Manually edit the .cmd file you created in PLAN. b. Change the EZ command from EZ1111111 to EZ0111111. This command appears twice in the .cmd file (one has a semi- colon in front of it). Change both listings for EZ. c. Add the fixed speed of sound command - EC1400 (or any value between 1400-1600). Be sure to add this command BEFORE the CK and CS commands. 32. What is "ringing," and what do I do about it? Some simple background information first. All ADCPs transmit an acoustic pulse into the water. This pulse bounces off particles in the water. The ADCP uses the signals returned from these particles to calculate the water velocity. Ideally, the ADCP uses just the main lobe of the transmitted pulse to process and calculate a velocity. However, the transmitted pulse contains many "side" lobes off the main lobe. These side lobes typically come in acoustic contact with the metal on the transducer head itself and other items in the water. The energy from the side lobes excites both the metal on the transducer head and anything bolted to the transducer. This causes the transducer and any attachments to resonate at the ADCP's transmit frequency. We refer to this as "ringing." If the ADCP is in its receive mode while the transducer is ringing, the ADCP will receive both the return signals from the water and the ringing signal. Both signals "look" valid, so the ADCP processes them. Unfortunately, the ringing signal is NOT valid, so the signal biases the velocity data. All ADCPs ring for some amount of time. As such, each ADCP needs a blanking period (time of no data processing) to avoid processing the ringing energy. Each ADCP frequency has a different ringing duration. The typical ringing periods as a function of distance for each ADCP frequency are as follows: 75-kHz = 6 meters 150-kHz = 4 meters 300-kHz = 2 meters 600-kHz = 1 meter 1200-kHz = 0.5 meter We recommend these typical ringing values (blanking periods) as the minimum setting for all ADCPs using the default setups. In some installations, the effects of ringing will last longer than the recommended settings listed above. For example, the effects of ringing will last longer: (1) if the mounting fixture (i.e.; a bracket/clamp, the ship's transducer well, etc.) also resonates, or (2) if the transmit signal becomes "trapped" inside the transducer well. A transmit signal can become "trapped" when you use a window to cover the opening of the well, or the beams do not clear the well within a 15 degree cone around each beam. The window and/or the walls of the well cause the transmit signal to reflect back into the well. When the transmit signal is reflected in the well, it becomes trapped. This results in longer ringing periods. To avoid processing any additional ringing signals, you must either increase the blanking period or remove the cause of the ringing. In some cases, it is possible to reduce or even remove the ringing by adding a material between the mating surfaces. This reduces the ability of the signal to couple from the transducer to the well or mounting brackets. In wells, it is advisable to use a material that will absorb reflected signals. Regrettably, RDI is not able to make suggestions on exactly what material to use. However, materials known to reduce coupling between mating surfaces include silicone, rubber, plastic, and cork. Additionally, many shipyards are familiar with materials to line the transducer well walls to absorb reflected energy. 33. Regarding battery capacities, what are the lower operating voltage limits at which the ADCP will operate satisfactorily? This is not as straight forward as one might expect. Below, we list the voltage ranges at which the ADCP will operate. However, the open-load voltages of alkaline battery packs must be at a higher voltage than the listed minimums to operate the system successfully. Additionally, the effective profiling range of the ADCP will become less as the battery voltage is reduced. Note that we base these tables on new battery packs. Many times, when a battery pack is not depleted in the deployment, we are asked if it can be re-used for the next deployment. The answer is "yes and no." If you re-use a battery pack within 30 days of its previous deployment, you should derate the remaining capacity by 10 percent. This will give you the true capacity remaining. We strongly recommend using new batteries for any deployments that will occur more than 30 days after the previous deployment. Please use the following guidelines to determine operational voltage ranges and minimum voltage checks for the battery packs. All our programs that give current-consumption predictions (i.e.; SCADCP, BBSETUP, and PLAN) will provide the amp-hours or watt-hours of usage. We also provide battery capacity tables in our manuals that will tell you how many batteries you will need based on the current consumption predictions. Operational voltage ranges for the various ADCPs are: Broadband -- 20 to 60 VDC Workhorse -- 20 to 60 VDC Narrowband (V1 supply) -- 6 to 12 VDC Narrowband (V2 supply) -- 20 to 40 VDC Notes: a. The lower the voltage, the less range you will achieve. Our programs predict range based on a voltage that is approximately 80 percent of the maximum battery voltage that we will use. b. Broadband - When new, the battery pack provides about 57 VDC. When the battery pack reaches an open-load voltage of 33 VDC, the batteries are effectively drained, and you should replace them. c. Workhorse - When new, the battery pack provides about 45 VDC. When the battery pack reaches an open-load voltage of 30 VDC, the batteries are effectively drained, and you should replace them. d. Narrowband - This system uses two, independent battery packs to supply the V1 and V2 voltages. The information below is based on Alkaline cells. V1 - When new, the battery pack provides about 9.4 VDC. When V1 reaches an open-load voltage of 6.5 VDC, you should replace the V1 battery pack. V2 - When new, the battery pack provides about 37.6 VDC. When V2 reaches an open-load voltage of 24.0 VDC, you should replace the V2 battery pack. 34. How can I do a manual unconditional data dump of my WHADCP recorder board? The WHADCP records its data in DOS format on a PCMCIA card. You can remove the PCMCIA card from the ADCP and plug it into the PCMCIA port on your computer. If you do not have a PCMCIA port, you must dump data via serial communications. To do a manual unconditional data dump through serial communications from the WH PCMCIA card, proceed as follows. a. Connect your ADCP to the computer as usual. b. Start the BBTALK program. c. Use F5 to select the correct COM port and baud rate. d. Send a BREAK to the ADCP (press the key). This will wake up the ADCP. e. Enter the following commands: CR1 (sets factory defaults) CK (saves factory default settings) RY (starts the Y-Modem Transfer and the ADCP will respond with the message "Please start your host now") f. Press Ctrl-PgDn when the message "Please start your host now" appears. A window will open showing the name of the file being dumped and the percent of data in that file that has been dumped. g. BBTALK will continue to dump all the data files that are on the PCMCIA card. The files are written to the same directory from which you are running BBTALK. The file names on the computer will be same as those on the card. When the transfer of all data is complete, a message will appear stating that the data dump is complete, the window will close, and the normal BBTALK screen will appear. 35. How can I do a manual data dump of a specific file on my WHADCP recorder board? The WHADCP records its data in DOS format on a PCMCIA card. You can remove the PCMCIA card from the ADCP and plug it into the PCMCIA port on your computer. You can now copy any file as you normally would on your computer's drives. If you do not have a PCMCIA port on your computer, you must dump data via serial communications. To do a manual dump of a specific file through serial communications from the WH PCMCIA card, proceed as follows. a. Connect your ADCP to the computer as usual. b. Start the BBTALK program. c. Use F5 to select the correct COM port and baud rate. d. Send a BREAK to the ADCP (press the key). This will wake up the ADCP. e. Send the command RR. The screen will show a directory of the files on the PCMCIA card. The files are in the order in which they were recorded. The first file recorded is considered Deployment 1, the second file Deployment 2, and so on. Make note of the file number you wish to download. NOTE: If several files are on the recorder, some file names may scroll off the screen. If this happens, then: (1) Press F3 to turn on the capture feature in BBTALK. (2) When the window appears, type the file name LIST.TXT. (3) Send the command RR. The ADCP will send the directory of files to the LIST.TXT file. (4) Press F3 after all the files are listed and the WH ADCP prompt appears. This will turn off the capture mode and close the LIST.TXT file. (5) Exit BBTALK and view the contents of LIST.TXT. You can now determine the file number you wish to download. f. Send the command RY##, where ## is the file number to download. This starts the Y-Modem Transfer of the file, and the ADCP will respond with the message "Please start your host now". g. Press Ctrl-PgDn when the message "Please start your host now" appears. A window will open showing the name of the file being dumped and the percent of data in that file that has been dumped. h. BBTALK will continue to dump the selected data file. The file will be written to the same directory from which you are running BBTALK. The file name on the computer will be same as that on the card. When the transfer of data is complete, a message will appear stating that the data dump is complete, the window will close, and the normal BBTALK screen will appear. 36. Can you give some recommendations for the Depth Cell Size and Blank After Transmit settings for workhorse systems? For workhorse systems, the commands are: WS - Depth Cell (Bin) Size WF - Blank After Transmit 300-kHz (Mode 1): Bin Blank Default 4 m 1.76 m Typical 2 m 1.76 m Sug.Min. 0.5 m 0.80 m Notes: Blank should be at least 1.5m for bin sizes > 1m 1200-kHz (Mode 1): Bin Blank Default 1 m 0.44 m Typical 1 m 0.44 m Sug.Min. 0.25 m 0.30 m Notes: Blank should be at least 0.3m for bin sizes > 0.25m 37. What is the typical battery capacity for a fresh Workhorse battery pack? To determine if you have sufficient battery capacity for a deployment, you must know the approximate water temperature at the deployment site, and then use the following table to determine the watt-hours available (based on a fresh battery pack). A fresh battery pack has 300 watt-hours of capacity at zero degrees C. Note that an external battery case can hold an additional two battery packs. Temp. W-hr Temp. W-hr Temp. W-hr Temp. W-hr 0 300 8 340 16 417 24 500 1 305 9 345 17 430 25 508 2 310 10 350 18 444 26 515 3 315 11 355 19 457 27 523 4 320 12 365 20 470 28 530 5 325 13 378 21 477 29 538 6 330 14 391 22 485 30 545 7 335 15 404 23 492 31 552 38. In TRANSECT, the menus display "garbage" characters. What can I do? This problem is characterized by all the text in the various TRANSECT menus being unreadable "garbage" (except the Planning menu). The cause of the problem is that some newer VIDEO BIOS chips are not 100% compatible with IBM's original VIDEO BIOS specification. Transect requires that the VIDEO BIOS be 100% compatible with the original IBM specification. The solution is to add the command line parameter "/B" when running TRANSECT (v2.80 or later). Example: TRANSECT /B. You will then see a brief message on the screen: "Transect configured to use BIOS services in graphics mode." You may want to create a TRANSECT.BAT file with the above command line parameter included if your video configuration requires this. Although the TRANSECT screen will not be readable, the display of text will be slower and the there may be video "snow" on the screen. These side-effects DO NOT EFFECT the performance of the TRANSECT software or the ADCP.