TDAS PRO LAB User Manual - Diversified Technical Systems
Contents
1. CHAPTER 1 INTRODUCING THE TDAS PRO LAB Each 8 channel module functions as a complete standalone data recorder with integral micro processor adaptive signal conditioning excitation sources A D circuitry and data memory Chapter Introducing the TDAS PRO LAB Each TDAS PRO LAB module is a highly advanced data recorder that 15 also easy to use collection project We are proud of our product and we want you to be completely satisfied with your purchase The TDAS PRO LAB is the latest evolution of our original TDAS product that has won praise for value and reliability The following information will introduce you to the inner workings of the TDAS PRO LAB ongratulations on choosing TDAS PRO LAB data recorder for your data Technical Overview TDAS PRO LAB hardware is a standard 19 inch rack mounted system commonly used for stationary laboratory data collection Each 8 channel module functions as a complete data recorder with integral microprocessor control adaptive signal conditioning excitation sources A D circuitry and data memoty TDAS PRO LAB functions ate set up using an IBM compatible computer Once the computer initializes the system it can be disconnected and the module will collect data with no additional support After the test data stored in each module is downloaded to the PC hard drive in binary format Once on the hard drive the binary data files are then unpacked for viewing and post proc2. Protection Post test Power Reduction Environmental Operating Temperature Physical Module Size Module Weight Standard 19 inch 3U Rack 48 Channel Rack Size 48 Channel Rack Weight Control Software Method Operating Systems Other Recommendations 110 240 VAC Depends largely upon connected sensors Up to 900 mA per 8 channel module with 3500 bridges and 10 V excitation on all channels 87 0 A maximum for 64 channels Self resetting fuses plus reverse current and transient over voltage protection Drops to 350 mA 8 channel module 0 50 C 54 x 48 x 1 35 in 13 7 x 12 2 x 3 4 cm 73 cm per channel 1 5 lb 0 7 kg 87 5 g per channel 5 25 x 19 0 x 9 0 in 13 34 x 48 26 x 22 86 cm 16 5 lb 7 5 includes modules Intuitive Graphic User Interface Windows 95 98 NT Pentium 100 MHz or faster 64 MB RAM 1024 x 768 resolution 14
3. fully calibrated using NIST traceable test equipment Each TDAS PRO LAB module is delivered with an embedded Module Information File MIF that contains calibration values for excitation sources internal references diagnostic circuits etc DTS recommends a standard recalibration interval of six months in accordance with TDAS PRO LAB calibration protocols DTS calibration tests include verification of all internal amplitude and time base references frequency sweeps on each measurement channel and verification of the performance of excitation sources and ancillary circuitry All TDAS products are delivered with updated MIF files and data plots showing the end to end response of each measurement channel against SAE J211 performance windows 10 CHAPTER 5 CONFIGURATION SPECIFICATIONS Chapter Configuration Specifications Our goal is that you understand our products well enough to trust us with your test data addressed in the specifications that follow please contact DTS and ask to speak you have questions regarding the performance of TDAS products that are not with a Technical Support The following information identifies the configuration of your TDAS PRO LAB system If you have any questions regarding the following configuration information specifications please contact us 1 Our standard internal shunt resistors are 0 1 25 ppm with the following values Several options are available Please see the document
4. DDTS 909 Electric Ave Suite 206 Seal Beach CA 90740 USA Phone 1 562 493 0158 Fax 1 562 493 3158 www dtsweb com TDAS PRO LAB Hardware User s Manual TOAS PRO LAB TOAS PRO LAB TOAS PRO LAB TDAS LAB 4 1 2 EVENT ARM EVENT ARM RACK FAULT 2 6 oJ 2 62 DTSWEB COM row SBF 7 002 6 5 1 May 2011 Rev 2 Table of Contents Technical Overview 2 TDAS PRO LAB Rack 4 Basic Care 11011 5 Unpacking Systemi 6 Connecting the Gales 6 Connecting Communication and Trigger Cables siitiiensaidiindidinattaiadadseats 6 Swit hing OP OW EP 7 Sensor Connector 8 Wiring Sensor Cables 8 Calibration 1 9 9 9 10 TDAS Hardware 10 12 13 13 EPIC OCHS SYS TOTS sec 13 Sensor OS nena eet ae eer Se ger et 13 Power Requirements and 14 14 14 14
5. Offset Accuracy Bridge Completion Anti Alias Filters Fixed Low Pass Adjustable Low Pass SAE J211 Digital Inputs Method Propagation Delay Excitation Method Voltage levels Accuracy Rated Current Short Circuit Recovery Differential software programmed 6 25 V 50 V 50 typical 0 8 to 2000 D C to 25 kHz 0 06 uV V Hz Typical 0 4 000 Hz 80 dB typical lt 0 05 under all circumstances 0 2 automatically calibrated each use by internal 16 bit DAC Dual 12 bit DACs per channel Gain 0 8 to 31 5 0 V Gain 232 150 mV Typically lt 0 1 of A D full scale Software selected per channel Two per channel 8 pole Butterworth customer specified knee point 4 3 kHz standard 5 pole Butterworth set under software control from 50 to 3 000 Hz System response meets SAE J211 require ments Sensor inputs may be used as event inputs with filters bypassed 0 02 msec Individually galvanically optically isolated and software selected Off 5 10 V standard Off 2 10 V optional 0 25 basic each channel calibrated and software compensated 50mA per channel individually current limited lt 1 msec in all modes 12 CHAPTER 5 CONFIGURATION SPECIFICATIONS Calibration Method Voltage insertion Type Accuracy Shunt Calibration Number Values Switching Resistance Analog to Digital Conversion Method Resolution Maximum Sampling Rate Minimum Sampling Rate Rel
6. a bridge transducer Shunt calibration is appropriate primarily for sensors that exhibit a predictable bridge resistance such as is the case with strain gage load cells accelerometers etc The TDAS PRO LAB system allows you to apply shunt resistance from within the TDAS PRO LAB module and or you can install an external shunt resistor between the Sig and Sig pins on the sensor interface connector Please see Chapter 5 Configuration Specifications for information regarding the internal shunt calibration resistors supplied with your system CHAPTER 4 MAINTAINING YOUR SYSTEM Chapter Maintaining Your System The TDAS PRO LAB has no mechanical adjustments and will provide years of trouble free service operate reliably in a laboratory testing environment Each unit is hand assembled by skilled technicians and there are no potentiometers to go out of adjustment F rom the ground up TDAS PRO LAB data recorders have been developed to General Care The TDAS PRO LAB system does not require any special care or maintenance except for periodic calibration Please remember though that all electronic instru mentation should be kept in a clean dry environment and be treated gently TDAS PRO LAB was not designed to withstand severe shocks such as drops onto a hard floor spilled liquids or other environments that are commonly detrimental to electronic measurement equipment TDAS Hardware Calibration TDAS PRO LAB modules are supplied
7. ated on the second panel from the left and next to the power indicator LED To switch the power on toggle the switch to the up position The POWER indicator LEDs on the module s and the rack will begin to blink green When power is turned off the POWER indicator on each module will stop flashing If you turn off the power then decided to turn it back on you must wait at kast 10 seconds after the module POWER indicators stop flashing to ensure a proper initialization of the modules CHAPTER 3 ATTACHING SENSORS Chapter Attaching Sensors The TDAS PRO LAB system supports a wide variety of COMMON SENSOTS way that one need only wire a sensor to the input connector and enter some basic sensor calibration information into a Sensor Information File SIF T he TDAS PRO LAB hardware works in concert with the software in such a Sensor Connector Options Each module can record up to eight channels of data simultaneously There are a variety of sensor input connector and pin assignment options available for your TDAS PRO LAB module Several options are available Please see the documentation provided with your system to determine your pin assignments Wiring Sensor Cables A wide variety of four wire bridge type transducers are accommodated by the adaptive electronics within the TDAS PRO LAB The system automatically accommodates bridge transducers with varying offsets and unequal arms The auto zero circuit is capable of bala
8. ation provided with your system to determine your specifications 2 Our standard 1 2 bridge completion resistors are 1k at 0 1 25 ppm 3 Each TDAS PRO LAB channel has a fixed 8 pole Butterworth filter and an adjustable 5 pole Butterworth filter The fixed filter 3 dB point has been specified to optimize performance on sampling rates up to 20k samples sec channel Standard is 4 3 kHz Several options 816 available Please see the documentation provided with your system to determine your specifications Software automatically chooses the best combination of fixed and variable filter usage for a selected sampling rate 4 Although the sampling rate is software adjustable to fine increments DTS purposely limits the choices This allows DTS to perform 100 Quality Assurance checks at all sampling rates prior to shipment of your TDAS LAB Our standard sampling rates per channel are as follows 250 500 1k 2k 5k 8k 10k 12 5k 20k 25k 38k 40k 50k 60k 75k 100k 150k and 300k 11 CHAPTER 5 CONFIGURATION SPECIFICATIONS For convenience a one page summary of your system s Hardware Configuration Specifications including pin assignments is included as a separate attachment Specifications Analog Inputs Type Common Mode Range Protection Impedance Gain Range Overall Bandwidth Noise Spectral Density Signal to Noise Ratio Crosstalk Accuracy Auto Offset Method Auto Offset Range Auto
9. ative Accuracy Storage Technique Memory Capacity Type Triggering Systems Each Module Rack System Level Triggering Sensor ID Method Types Supported PC Interface Module standalone Individually software controlled voltage insertion and multiple shunt calibrations 16 bit DAC Better than 0 1 100 ppm C NIST traceable and software compensated 7 internal and 1 external Customer specified 0 1 25 ppm 20 Successive approximation with simultaneous sampling of all channels up to 25k samples per second per channel Standard 16 bit 304k samples sec module 38k on each of 8 channels 100k on each of 3 channels etc 1 sample sec channel 4 LSB 0 006 Circular memory buffer Any portion of the memory may be allocated to pre trigger data 2 options 4 MB SRAM 250k samples channel or 16 MB SRAM 1 MB samples channel Conditioned contact closure input with T 0 received LED indicator Standard contact closure input galvanically and optically isolated to 1 5 12V optically coupled inputs available Available from any channel within each module Serial data read from signal terminal or digital I O line in sensor connector Dallas Endevco DTS and others as specified RS232 115 2 kHz 13 CHAPTER 5 CONFIGURATION SPECIFICATIONS Rack System Standard RS232 115 2 kHz up to 460k with PC plug in card Power Requirements and Features External Voltage Maximum Power
10. essing There are no potentiometers to adjust because hardware settings are performed completely under software control Every time a data collection task is initiated the software runs a thorough calibration check on each measurement channel Appropriate gains are set sensor offsets are zeroed and anti aliasing filters are set Sensor inputs are through connectors located on the front of each TDAS PRO LAB module See Chapter 5 Configuration Specifications for your specific connectors and pin assignments CHAPTER 1 INTRODUCING THE TDAS PRO LAB TDAS BLOCK DIAGRAM TDAS ee PROCESSOR SENSOR INPUTS SERIAL LINK NOT REQUIRED DURING DATA COLLECTIO SENSOR INFORMATION CHOOSE TSF SCALE DATA FILE VERIFY SETUP FILTER DATA eae WAIT FOR TRIGGER PERFORM CALCULATIONS GAIN FACTOR COLLECT DATA PLOT DATA TO SCREEN MODEL DOWNLOAD DATA SERIAL NO RATE amp TIME SENSOR CHANS i CALCULATED MULTIPLY CHANNELS INTEGRAL HIC ETC Figure 1 TDAS Block Diagram Each TDAS PRO LAB module is a completely autonomous data collection system CHAPTER 1 INTRODUCING THE TDAS PRO LAB Each TDAS PRO LAB module contains the following subassemblies A System Board that contains eight channels of adaptive signal conditioning voltage insertion calibration functions filtering A D and triggering circuitry Hardware anti aliasing filters are set
11. ional This requires additional hardware installed at the factory and therefore must be specified at the time your order is placed Please see your packing slip for the communication cable s supplied with your system to determine what communication options you have CHAPTER 1 INTRODUCING THE TDAS PRO LAB Basic Care and Handling The TDAS PRO LAB is a high precision measurement instrument designed to operate in laboratory testing environment This system was vot designed to tolerate shock vibration spilled liquids etc WARNING TDAS PRO LAB is not a crashworthy system Do not subject the system to any adverse shock loads or extreme environmental conditions When transporting the unit treat it as you might a laptop computer and you should have no problems CHAPTER 2 GETTING STARTED Chapter Getting Started Getting started with the TDAS PRO LAB easy Follow these simple steps and you will be collecting data before you know it his section will assist you in using your TDAS PRO LAB system for the first time After unpacking the system you will attach an external power supply connect the communication cable and perform a preliminary system test Unpacking the System Open the box and unpack the system Please check for the items specified on the packing list for your system If you ate missing any items please contact us immediately so that we may correct any shortages Connecting the Cables Plug the AC powe
12. ncing most bridges beyond their full scale ranges Half bridge three wire sensors such as potentiometers can be accommodated by connecting the sensor excitation leads to excitation and the signal lead to signal Use half bridge in the software set up Single ended voltage inputs that are referenced to common may be accommodated by connecting the voltage source common to TDAS PRO LAB common and 10 and the signal to the Sig input When 5 V excitation is chosen the negative excitation terminal is internally connected to system common and may be used to reference single ended input signals CHAPTER 3 ATTACHING SENSORS Calibration Techniques TDAS PRO LAB hardware supports both voltage insertion and true shunt calibration methodologies Voltage Insertion As the name implies a precise calibration voltage source is temporarily connected to the sensor input amplifier Voltage insertion calibrations are generally the best choice when the signal source has an actively driven output as is the case with many of the latest 0 5 V active output accelerometers and angular rate sensors Voltage insertion may also be the best choice for passive sensors that have a bridge resistance that varies significantly with temperature from sensor to sensor Some silicon based piezo resistive sensors fall into this category Shunt Calibration Shunt calibration is the temporary application of an external resistance across one leg of
13. r cord into any power outlet that supplies 100 240 V 50 60 Hz The ground pin on the plug must connect to a suitable facility ground Connecting Communication and Trigger Cables TDAS PRO LAB contains a robust RS232C serial communication driver and may be connected to the standard serial port on virtually any IBM compatible personal computer You can use any available communications port from to 1 Attach one end of the serial cable to the TDAS PRO LAB rack connector see Figure 2 2 Attach the other end of the serial cable to the communications port on your computer CHAPTER 2 GETTING STARTED Ethernet Serial Connection Trigger Input fe Figure 2 TDAS PRO LAB Rear View RS2332 and Ethernet option e A standard off the shelf serial RS232 cable is needed to communicate with the TDAS PRO LAB track system Note that the cable should not be any longer than 25 feet Ethernet communications are optional and use either 19 pin LEMO connector RS232 communications are also possible through either LEMO connector Please see your packing slip for the communication cable s supplied with your system to determine what communication options you have e A contact closure trigger switch can be connected to the binding post banana jack input located on the rear panel e Please contact DTS if you have questions regarding these functions Switching On Power The power switch for the TDAS PRO LAB is loc
14. under software control based user selected data sampling rates A Processor Board that is very similar to most PCs in that it has a microprocessor program storage RAM and communication links The internal processor uses digital I O channels to control all module functions An Auxiliary Board that contains power control circuitry battery charging status circuitry software programmable isolated excitation sources and shunt calibration circuitry Power inputs are diode protected and fused by self resetting fuses Each measurement channel consists of the elements depicted below See Chapter 5 Configuration Specifications for additional information Front end gain 1 or 32 Set gain stages 1 and 2 voltage insertion 8 pole amp Instrument 5 pole Butterworth 0 Amp z Filters i A D Input shunt cals Enable Sample and Hold Front End Signal Switching Offset DACs 12 bit Coarsg 12 bit Fine TDAS PRO LAB Rack Systems Up to six 8 channel modules can be installed in the available 19 rack Several racks may be daisy chained to form systems with large channel counts The rack unit distributes communication signals operating power power up control trigger signal and slot programming codes The rack also contains a 1000 V isolated time zero trigger buffer power status indicator and provisions for using RS232 communication protocols Note that Ethernet 10Base T communications are opt
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