TempDAQ User Manual
Contents
1. RetVal PassThruloctl ChannelID amp value RetVal STATUS_NOERROR READ_CH1_VOLTAGE NULL PassThruGetLastError errstring printf Reading ADC failed Code d s n errstring exit 1 RetVal For TempDAQ find thermocouple value in degC voltage value 6125 393 9 temp tempC voltage Troubleshooting and Support DrewTech is available 9 00am to 5 30pm eastern standard time Monday through Friday to answer any questions Please email support drewtech com if you need assistance If TempDAQ Doesn t Power on or Read Inputs If the power light is on verify that the front panel is selecting the correct input thermocouple or BNC If the power light is off check the serial number of CarDAQ2534 Any CarDAQ2534 before serial number 1656 Rev J requires a factory performed upgrade Please contact DrewTech for further information Improving CarDAQ2534 A D Accuracy When connected to a standard CarDAQ2534 TempDAQ can measure a wide temperature range with 2 C accuracy and 1 C resolution A factory performed CarDAQ2534 upgrade is available 0 1 tolerance resistors which improves accuracy to better than 1 C Please contact Drewtech for further information Updating CarDAQ s Drivers and Firmware Your CarDAQ contains field upgradeable firmware Updates are regularly released which include new features improve performance and correct problems Please visit DrewTech s download page2. full dynamic range of its A D subsystem It also provides BNC inputs to read 0 27v range signals Connecting Sensors The TempDAQ supports up to 6 channels of analog input using K type thermocouple or BNC connectors Connect either a BNC or K type thermocouple to the appropriate channel on TempDAQ s front panel Then choose the appropriate input set the switch up for thermocouple or down for BNC input Measuring Temperatures The TempDAQ CD includes source code and a sample program AnalogDemo exe for reading temperatures Run this program to verify that the sensors and hardware have been connected properly TempDAQ scales and offsets a K type thermocouple s voltage so CarDAQ can use its A D dynamic range Given that the PassThruloctl functions return a voltage mV calculate the thermocouple s voltage output mV using the following equation Vrce Vcarpag 6125 393 9 NIST provides inverse approximations for temperature as a function of voltage mV for K type thermocouples The functions are of the form Temp do d Vrc eters hy ae Aie The AnalogDemo source code implements this inverse approximation in function tempC Refer to the NIST ITS 90 tables if you wish to implement your own conversion functions Measuring Voltages TempDAQ does not scale voltages on the BNC inputs The PassThruloctl functions return the actual voltage mV present at the BNC Developing Custom Applications CarDAQ
3. Contents GETTING STARTED WITH TEMPDAQ csscsssstssenserenees Hardware Setup Software setup USING TEMPDAQ veescsssssseessestsenserensessnsrenseeneereneereneereneneeneneenn Connecting Sensors Measuring Temperatures Measuring Voltages DEVELOPING CUSTOM APPLICATIONS csssssssssnssssnees PassThruloctl GET_CONFIG and SET_CONFIG PassThruloctl READ_ANALOG_CH1 CH6 PassThruloctl READ_CH1_VOLTAGE CH6 TROUBLESHOOTING AND SUPPORT ccssssssssssnsssnseenens SPECIFICATIONS AND CONNECTORS ccssssssesssensees Analog Connector TempDAQ Analog Connector CarDAQ25 34 Analog Connector CarDAQ Plus NOTICES ABOUT TESTING AND CERTIFICATION Statements United States European Union Getting Started with TempDAQ Thank you for purchasing TempDAQ This analog breakout box allows your existing CarDAQ2534 or CarDAQ Plus hardware to measure up to 6 channels of temperature data or analog voltages TempDAQ measures a temperature range 200 C to 1250 C better than 1 C of resolution CarDAQ2534 users please contact DrewTech about a factory upgrade 0 1 tolerance resistors which improves accuracy from 2 C to better than 1 C This change is already present for CarDAQ Plus Your package includes the TempDAQ hardware an interface cable and a CD including sample programs and source code Please visit the DrewTech website for manual or software updates Hardware Setup Connect TempDAQ to CarDAQ2534 s an
4. Ground Analog Connector CarDAQ Plus Mating connector Male D Sub High Density 15 Digikey P N T815M ND Pin Function Direction 10 Channel 1 In 14 Channel 2 In 4 Channel 3 In 8 Channel 4 In 5 Channel 5 In 2 Channel 6 In 6 Battery Voltage Out 1 3 5 7 9 11 GND 13 15 Notices about Testing and Certification Drew Technologies equipment is designed and built using best commercial practices None of our equipment is subjected to any kind of compliance testing nor is the equipment certified to meet any particular requirements with regards to EMI EMC ESD or others This applies to all of our products unless specified otherwise Additional details are provided here Statements Our equipment is marketed only to the automotive and related industries Users of our equipment are intended to be qualified engineers and technicians Our equipment is intended for use in an_ industrial environment Our equipment is intended to be test equipment Our equipment requires integration with other test equipment to function At a minimum a computer and a unit under test are required The unit under test may be a module several modules an entire motor vehicle or similar test set up Our equipment is not intended for use by consumers or ina consumer environment We do not sell to individual consumers United States The governing body is the FCC Federal Communications Commission 16 P
5. alog port using the included interface cable Verify that the red power LED on the rear panel lights when connected to a powered CarDAQ Note If the power light is off check the serial number of CarDAQ2534 Any CarDAQ2534 before serial number 1656 Rev J requires a factory performed upgrade Please contact DrewTech for further information Powering CarDAQ Remember that your PC cannot provide CarDAQ2534 with power over its RS 232 or Ethernet ports There are three options for powering the CarDAQ2534 1 Attached to a vehicle The vehicle supplies power on pin 16 of its OBD II SAE J1962 connector CarDAQ is powered whenever it is connected to a vehicle 2 Signal breakout box Using the DrewTech J1962 to banana jack adapter apply between 6 to 15 VDC at the Vbatt pin 16 terminal Use ChGnd pin 4 for reference 3 Custom harness Using the CarDAQ connector kit available upon request build a custom wiring harness Refer to pin diagrams in the CarDAQ2534 manual for details Software setup Install the CarDAQ driver software normally all TempDAQ functionality is provided through cardaq32 dll and no additional configuration is required for TempDAQ features Sample programs and source code are available on the DrewTech website and on the CD included in this package Using TempDAQ TempDAQ is a temperature compensated amplifier that reads voltage from K type thermocouples and scales it to 0 27V so CarDAQ can use the
6. at http www drewtech com downloads Apply power to CarDAQ Run J2534install exe similar to a new installation to install the new J2534 DLL on the PC Then run cardaq_setup exe to reprogram CarDAQ with the new firmware Specifications and Connectors TempDAQ Rev A Specifications Name Value Input Voltage Range 6VDC to 15VDC Operating Commercial Range 0 C to 70 C Temperature CarDAQ utilizes Switchcraft s EN3 weather tight series for all external connections Pin 1 is indicated by a small bump inside the male connector at the 11 o clock position The remaining pins are in a counter clockwise pattern with the last pin in the center for the six and eight pin connectors Analog Connector TempDAQ Mating connector DB 15F Pin Function Direction 1 Channel 1 Out 2 Channel 2 Out 3 Channel 3 Out 4 Channel 4 Out 5 Channel 5 Out 6 Channel 6 Out 7 to 14 Ground 15 Battery Voltage In Analog Connector CarDAQ2534 Mating connector EN3C8F DigiKey P N SC1164 ND The male image below was obtained from Switchcraft s product data sheet 4 5 3 O59 O97 1 a aa CarDAQ s 12 bit analog inputs are setup for an input range of 0 to 27 5VDC and electrically protected against reverse voltage and over voltage conditions Pin Function Direction Channel 1 In 2 Channel 2 In 3 Channel 3 In 4 Channel 4 In 5 Channel 5 In 6 Channel 6 In 7 Battery Voltage Out 8
7. ber of ADC samples to read If not enough samples are available function returns actual number read pOutput Pointer to array where requested A D samples mV will be copied See Also PassThruloctl GET_CONFIG and SET_CONFIG Example Request 20 ADC samples in mV unsigned long values 20 int num 20 RetVal PassThruloctl ChannelID values if RetVal STATUS_NOERROR READ_ANALOG_CH1 amp num PassThruGetLastError errstring printf Reading ADC failed Code d s n errstring exit 1 RetVal Pass Thruloctl READ_CH1_VOLTAGE CH6 Syntax include 32534 v0202 h long PassThruloctl unsigned long ChannelID unsigned long ToctlID void pInput void pOutput Description The PassThruloctl function is a general purpose I O control function for modifying the vehicle network interface characteristics TempDAQ extends this function to read temperature information This ioctl mode returns the most recent sample mV on a specific ADC channel 1 to 6 and flushes all other samples currently in the queue Parameters ChannellD Logical communication channel identifier loctlID READ_ANALOG_CH1 READ_ ANALOG_CH6 plnput NULL pOutput Pointer to unsigned long where most recent value mV will be copied Following this call buffered samples will be flushed See Also PassThruloctl GET_CONFIG and SET_CONFIG Example Read the most recent ADC sample in mV 11 12
8. ee Point 3 below Point 2 The governing Directive is Low Voltage Directive 73 23 EEC including all amendments We do not test our equipment to meet this directive See Point 3 below Point 3 Our equipment can only be sold and exported to EU customers under very narrow terms Our equipment has no intrinsic function it requires other equipment with which to work Our equipment is considered a component of a larger equipment item or system The customer is responsible for integrating our equipment into their equipment or system The customer is responsible for all subsequent testing and certification of the resulting equipment or system All questions should be addressed to Engineering Dept Drew Technologies Inc
9. eneral purpose I O control list ConfigPtr param function for modifying the vehicle network interface characteristics TempDAQ defines two new parameters to configure the ADCs on an existing logical communications channel ADC_READINGS_PER_SECOND is the total number of voltage readings each second Hz for all 6 channels ADC_READINGS_PER_SAMPLE specifies the number of voltage readings to average for each sample Usually set this to 1 RetVal PassThruloctl ChannelID SET_CONFIG amp list NULL The A D sampling rate is equal to the number of readings per second divided by the number of readings per sample Parameters ChannellD Logical communication channel identifier loctlID GET_CONFIG or SET_CONFIG plnput Pointer to list of parameters to read or parameter value pairs to set pOutput NULL PassThruloctl READ_ANALOG_CH1 CH6 Syntax include 32534 v0202 h long PassThruloctl unsigned long ChannelID unsigned long ToctlID void pInput void pOutput Description The PassThruloctl function is a general purpose I O control function for modifying the vehicle network interface characteristics TempDAQ extends this function to read temperature information This mode returns all buffered samples mV on a specific ADC channel 1 to 6 since the previous call Parameters ChannellD Logical communication channel identifier loctlID READ_ANALOG_CH1 READ_ ANALOG_CH6 plnput Requested num
10. is fully compliant with the PassThru SAE J2534 API which protects your investment in developing custom software This syntax and set of driver functions allows a software application to discover and use any vendor s PassThru hardware with any modern automotive diagnostic protocol Since temperature and voltage measurement is currently unique to DrewTech we provide vendor specific extensions to the PassThruloctl function DrewTech s j2534_v0202 h_ file defines several new PassThruloctl modes for reading temperature data loctl Mode plnput pOutput READ_ANALOG_CHI1 CH6 NULL ulong READ_CH1_VOLTAGE NULL ulong CH6 There are two new parameters for PassThruloctl SET_CONFIG and GET_CONFIG SCONFIG Parameter Name ID Value ADC_READINGS_PER_SECOND 0x10000 Rate in Hz ADC_READINGS_PER_SAMPLE 0x20000 Averages DrewTech also offers a complete set of LabVIEW VIs for CarDAQ2534 with native datatypes and context sensitive help Please contact DrewTech for information about using TempDAQ with LabVIEW See Also Pass Thruloctl GET_CONFIG and PassThruloctl READ_ANALOG_CH1 6 SET_CONFIG Example Syntax SCONFIG param 10 include 32534 v0202 h SCONFIG_LIST list long PassThruloctl unsigned long ChannelID unsigned long IoctlID SCONFIG_LIST pInput NULL param 0 Parameter ADC_READINGS_PER_SECOND param 0 Value 10 Description list NumOfParams 1 The PassThruloctl function is a g
11. oint 1 The controlling law is Title 47 Code of Federal Regulations Part 15 Radio Frequency Devices We state that our equipment is classified as a Class A Digital Device We cite 47 CFR Part 15 Subpart A section 15 3 Definitions paragraph h Class A digital device A digital device that is marketed for use in a commercial industrial or business environment exclusive of a device which is marketed for use by the general public or is intended to be used in the home Additionally our equipment is considered an un intentional radiator We state that our equipment is exempt from the certification requirements of Part 15 We cite 47 CFR Part 15 Subpart B section 15 103 Exempted Devices paragraph c A digital device used exclusively as industrial commercial or medical test equipment We do not test our equipment to meet any requirements of 47 CFR Part 15 Point 2 The controlling law is Title 47 Code of Federal Regulations Part 18 Industrial Scientific and Medical Equipment We cite 47 CFR Part 18 Subpart A section 18 115 Elimination and investigation of harmful interference The user assumes responsibility for eliminating the source of harmful interference European Union The governing body is the European Community and its various bodies Point 1 The governing Directive is EMC Directive 89 336 EEC including all amendments We do not test our equipment to meet this directive S
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