Summary of Contents for DATASONICS PSA-916
- Page 1 Datasonics, Inc. PSA-916 Sonar Altimeter User’s Manual Rev. March 1997 Datasonics, Inc. P.O. Box 8 - 1400 Route 28A Cataumet, MA 02534 Telephone: 508/563-5511 Fax: 508/563-9312...
- Page 3 Datasonics. WARRANTY Datasonics, Inc. warrants each of its products to be free from defects in material and workmanship for a period of one year from date of delivery to the original purchaser.
- Page 4 Altimeter. This User Manual provides complete instructions on using and maintaining the PSA-916. Please read it prior to deploying the equipment and keep it where it can provide a reference during setup and operation of the altimeter. PSA-916 Sonar Altimeter...
- Page 5 We appreciate any suggestions you may have for making Datasonics products more useful to you and other users, including comments about the PSA-916 unit itself, the way the equipment is packaged and delivered and the quality of this User's Manual. Please use this Customer Feedback Form to identify any areas where we can make improvements.
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Page 6: Table Of Contents
Power Supply .......................4-2 Transmitter ........................4-2 Receiver ........................4-2 Microcontroller ......................4-3 Firmware Description .......................4-3 Main Program ......................4-3 Averaging Algorithm ....................4-4 Diagnostics ........................4-4 Analog output ......................4-4 Test Points ........................4-5 Error Message ......................4-5 Section 5. Packing List ....................5-1 PSA-916 Sonar Altimeter March 1997... - Page 7 Section 6. Drawing List ....................6-1...
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Page 8: Section 1. Overview
The unit provides range data in both analog and digital formats for analysis and process control. The PSA-916 is housed in a corrosion-resistant anodized aluminum pressure case. It is O-ring-sealed and rated for operation in water depths up to 2,500 meters. The external 6-pin connector provides connections for external power source input, external key source input, analog and RS-232 output. -
Page 9: Applications
The Model PSA-916 with the built-in flexibility of its microprocessor design, cost-effectively meets a wide variety of sonar measurement applications with a single self-contained instrument. The most common use of the Model PSA-916 Sonar Altimeter is for altitude measurement (height above bottom). Other uses include: Wave height measurement... -
Page 10: Section 2. Specifications Of Unit
DATASONICS Section 2. Specifications of Unit TRANSMIT FREQUENCY: 200 kHz TRANSMIT PULSE WIDTH: 250 microseconds BEAM PATTERN: 14° conical PULSE REPETITION RATE: Selectable: Internal or External Internal - 5 pulses per second External - customer controlled rate, up to 5... - Page 11 PSA-916 Sonar Altimeter Table 6.1 Configuration Standard FSI Mode Custom Description of Configuration Key (SW 1 & 2) Internal External Serial Output (SW 1 & 2) Every Cycle Gain (SW 3) High High Under Range Detection (SW 4) Disabled Disabled Baud (SW 5 &...
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Page 12: Section 3. Setup And Deployment
Carefully inspect each instrument for physical damage as it is unpacked. Report any damage to the freight carrier and to the Datasonics sales office, at the number listed below. Store the shipping cartons and packing materials in a cool, dry place for later use in system transport. -
Page 13: Connection
Datasonics immediately. 3.2 Connection The PSA-916 outputs data and receives power through a 6 pin connector. The PSA-916 is supplied with the mating pigtail and a dummy plug. Whenever the pigtail is not installed, install the dummy plug to protect the connector pins. -
Page 14: Rs-232 Output
*To select RS-232 Output install a jumper between JP3 pins 1 & 2. To select Error Output install a jumper between JP3 pins 2 & 3. Figure 3-1 Connector view, looking at the PSA-916 3.2.2 RS-232 Output The RS-232 output is set to the following parameters:... -
Page 15: Error Output
(4.98 VDC). 3.2.5 External Key This line is used to tell the PSA-916 to take a range reading. The altimeter looks for a transition from a logic 1 (5 volts) to a logic 0 (0 volts). Once the transition is detected the altimeter will take a range reading and wait 200ms before looking for the next transition. -
Page 16: Configuration
DATASONICS 3.3 Configuration There are seven switches which determine the mode of operation. The different combinations are listed in the table below. DIP SWITCHES - All dip switch changes will take affect immediately, except for the baud rate. To change baud rate the unit must be reset(i.e. cycle pwr). -
Page 17: Deployment
PSA-916 Sonar Altimeter NOTE: Always test the operation of each PSA-916 as a stand-alone instrument before integrating it into another system. Datasonics recommends that an in-air test be performed followed by a short range in-water test prior to the actual deployment. -
Page 18: Maintenance
ROV truster motors are not between the altimeter and the target surface, and that they are well away from the transducer. Securely fasten the PSA-916 to its platform, vehicle or instrument package, making sure there are no obstructions between the transducer face and the intended target. - Page 19 PSA-916 Sonar Altimeter To ensure an even greater level of reliability, Datasonics recommends that you take a few preventive maintenance measures and that you contact Datasonics early in your efforts to troubleshoot an altimeter malfunction. We have found that most problems are related to the acoustic environment and can be solved with applications planning and pre-deployment testing.
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Page 20: Section 4. Theory Of Operation
R - range in meters The nominal speed of sound is 1,500 meters per second in water, and is used by the PSA-916. Note that the speed of sound is affected by temperature, salinity, and pressure. The ∆ t factor is the jitter or the ability of the detectors to accurately determine the presence or absence of a pulse. -
Page 21: Power Supply
PSA-916 Sonar Altimeter 4.2.1 Power Supply The input power can range from 6 to 24 volts, and is diode protected by CR1 to prevent reverse polarity. The power supply regulates the input power to 5vdc and 12vdc. VR3 regulates the 5 VDC and U6 and VR2 produce the 12 VDC. -
Page 22: Microcontroller
DATASONICS 4.2.4 Microcontroller The microcontroller(U8) provides the system timing and computing power. U8 operates at a clock frequency of 12Mhz controlled by crystal X1. When power is applied, a power on reset pulse is generated by R16 and C17. This positive pulse initializes U8. -
Page 23: Averaging Algorithm
3 Volts Analog out = 3V 4 Volts Analog out = 4V 5 Volts Analog out = 5V Datasonics Use Datasonics Use Warning - Do not set to the "Datasonics use" position, or damage may result. Theory of Operation Diagnostics... -
Page 24: Test Points
DATASONICS 4.4.2 Test Points TP1 Detector: normally a logic 1 (5 VDC), whenever a transmission or a received echo is detected the line goes to a logic 0 (0vdc) for the duration of the detection. TP2 Transmit Pulse: normally a logic 1 (12 VDC). During transmit a train of 1.8us pulses at the transmit frequency. -
Page 25: Section 5. Packing List
PSA-916 Sonar Altimeter Section 5. Packing List Part No. Manufacturer Description 007216 Datasonics, Inc. PSA-916, Top Assembly RMG-6-FS Impulse Connector, 6 pin, pigtail RMG-6-FSD-HP Impulse Connector, 6 pin, dummy 007217 Datasonics, Inc. Manual, PSA-916 Packing List... - Page 26 DATASONICS Section 6. Drawing List Drawing Number Description C916-06812 Assy, Altimeter Board D916-07008 Schematic User’s Manual March 1997...
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