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dataTaker DT800 Manual

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DT800 Demonstration
Sensor Simulation Panel
Operating Instructions

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Summary of Contents for dataTaker DT800

  • Page 1 DT800 Demonstration Sensor Simulation Panel Operating Instructions...

  • Page 2: Table Of Contents

    Table of Contents 1. Introduction........................4 2. Installing the Sensor Simulation Panel ................4 3. A Quick Tour ........................8 4. Powering the SSP ......................9 5. DeTransfer Examples: ....................10 5.1 Potentiometer 1...................... 10 5.2 Potentiometer 2...................... 10 5.3 Potentiometer 3...................... 10 5.4 Speaker / Microphone ....................
  • Page 3 Table of Contents 6.10 Analog Output ...................... 24 6.11 Thermocouple ...................... 25 6.12 Scan Schedules ....................25 6.12.1 Polled ......................25 6.12.2 Real Time....................25 6.12.3 Digital Events ....................26 6.12.4 Counter Events ................... 26 6.12.5 While Digital Event..................26 6.12.6 Change of CV....................

  • Page 4: Introduction

    • For teaching the principles of data acquisition, process control, system monitoring, data capture and transfer, etc. in educational institutions Installing the Sensor Simulation Panel The SSP replaces the DT800 terminal assembly. The SSP is installed on the DT800 as follows Fig. 1. Fig. 2.
  • Page 5 Fig. 3. Fig. 4. Closing the case Page 5...
  • Page 6 Fig. 5. Fig. 6. Page 6...
  • Page 7 Fig. 7. Fig. 8. Page 7...

  • Page 8: A Quick Tour

    Fig. 9. A Quick Tour The SSP has the following sensors and actuators • Potentiometer 1 – variable voltage, current or current loop • Potentiometer 2 – variable resistance • Potentiometer 3 – variable RTD simulator • Speaker / Microphone •...

  • Page 9: Powering The Ssp

    6 to complete the sensor set. Powering the SSP Several of the sensors and actuators on the SSP require power, which is supplied by the DT800. Two power supplies are used, the 5 VDC sensor power supply provided on terminal Sp, and the 12VDC serial data channel power supply provided on terminal Serial 12V.

  • Page 10: Detransfer Examples

    CD ROM or copied from the CD ROM to the DeTransfer sub-directory C:\Program Files\Datataker\Detransfer. To open a command file in DeTransfer, Click on File and select Open from the drop down menu. In the file selection dialog box select the path to where your files have been saved and open the appropriate command file.

  • Page 11: Speaker / Microphone

    Speaker / Microphone (Labelled 1*V 7C(LT)) The speaker / microphone is connected to analog terminal 1* and digital input 7. A signal waveform can be captured from the microphone by the program (Prog4.dxc) BEGIN"Mic_1" RA;BURST(100,10000,LEVEL,50,5S) 1*VNC(LEVEL>10,GL50MV,FF5) Tap the microphone sharply with your finger or a pencil. An analog frequency and digital frequency from the microphone can also be read by the program.

  • Page 12: Ruler

    Serial Data Channel (Labelled Serial Sensor RS232) The SSP provides a 9 pin D connector for the RS232 function of the serial data channel of the DT800. This connector is configured the same as a COM port of a PC viz •...

  • Page 13: Digital Inputs

    Similarly a dataTaker 500 series data logger could be connected to the SSP (make sure that the DT500 series logger is reset and in default data format), and read the voltage on channel 1 of the logger by the program. (Prog11.dxc) BEGIN"Serial_2"...

  • Page 14: Flexible Tongue

    5.11 Flexible Tongue (Labelled 2BGI, 8C(LT) 5*V) The SSP has a flexible tongue along the front edge, which has fine copper tracks on both the topside and underside of the tongue that are configured as two active arms of a bridge. The strain on the tongue as the tongue is depressed can be read by the program.

  • Page 15: Analog Output

    (Prog17.dxc) BEGIN”Temp” RA1S 5.14 Scan Schedules The SSP can be used to demonstrate several of the scan schedule triggers available in the DT800 as follows: • 5.14.1 Poll trigger by host (Prog18.dxc) BEGIN”Poll”...

  • Page 16: Real Time

    • 5.14.2 Realtime trigger (Prog19.dxc) BEGIN”Time” P47=5 1SSPWR=1 RA5S ‘Schedule triggers every 5 seconds 1V 3R 4PT385 • 5.14.3 Digital event trigger (Prog20.dxc) BEGIN”Event” P47=5 1SSPWR=1 RA1+E ‘Schedule triggers when digital input 1 goes high 1V 3R 4PT385 Press push button 1 to produce digital events •...

  • Page 17: Alarms

    5.15 Alarms The features of the DT800’s alarms can be readily demonstrated on the SSP, for example (Prog24.dxc) BEGIN”Alarm” P47=5 1SSPWR=1 RA1S ALARM(1V>1000)3DSO”High Voltage ! ?c ? ?u @ #^M^J” Increase and decrease the voltage by rotating potentiometer 1. The LED on digital channel 3 will illuminate when the input voltage on channel 1 exceeds 1000mV.

  • Page 18: Delogger4 Examples

    This section briefly describes the use of each of the sensors and actuators on the SSP. To run the example programs run the distribution CD ROM to load the project into DeLogger. Then open DeLogger4 then click on Open and select DT800 SSP and click on open. Select the file named DT800 SSP.dlw and click on open...

  • Page 19: Speaker / Microphone

    Potentiomener 3 (Labelled 4PT385) This potentiometer is connected to analog input channel 4 as a 4 wire RTD input, and produces a variable temperature in the range approximately -20 to 200 deg C. The RTD resistance and corresponding ‘temperature’ can be read by loading the program Prog3.dl8 Fig.

  • Page 20: Light Sensor

    An analog frequency and digital frequency from the microphone can also be read by loading the program Prog5.dl8 Fig. 15. Tap the microphone sharply with your finger or a pencil. The resistance of the speaker coil (nominally 8 Ohm) can be read by the program Prog6.dl8 Fig.

  • Page 21: Ruler

    Ruler (Labelled 6BGI) The ruler along the front edge of the SSP configured as a resistance bridge, in which 2 halves of the ruler are two active arms of the bridge. Connect a flying lead wire to the + terminal of analog channel 6, and touch the other end onto the white markings along the ruler while running the DeLogger program Prog8.dl8 Fig.

  • Page 22: Serial Data Channel

    Serial Data Channel (Labelled Serial Sensor RS232) The SSP provides a 9 pin D connector for the RS232 function of the serial data channel of the DT800. This connector is configured the same as a COM port of a PC viz •...

  • Page 23: Digital Inputs

    Digital Inputs (Labelled 1DS and 2DS) The SSP has two push buttons, connected to digital input channels 1 and 2 respectively. The program can read the state of the push buttons and the number of pushes Prog12.dl8 Fig. 23. Flexible Tongue (Labelled 2BGI, 8C(LT) 5*V) The SSP has a flexible tongue along the front edge, which has fine copper tracks on both the topside and underside of the tongue that are configured as two active arms of a bridge.

  • Page 24: Analog Output

    • an analog frequency Prog15.dl8 Fig. 26. • a digital count Prog16.dlp Fig. 27. 6.10 Analog Output The SSP has two LEDs connected to the analog output channel. The yellow LED indicates positive analog output voltages, while the green LED indicates negative analog output voltages. The analog output can be set by the command VO=level where level is in millivolts in the range –10000 to 10000mV.

  • Page 25: Thermocouple

    (Prog18.dl8) Fig. 29. 6.12 Scan Schedules The SSP can be used to demonstrate several of the scan schedule triggers available in the DT800 as follows: • 6.12.1 Poll trigger by host (Prog19.dl8) Fig. 30.

  • Page 26: Digital Events

    Fig. 31. • 6.12.3 Digital event trigger (Prog21.dl8) Fig. 32. Press push button 1 to produce digital events • 6.12.4 Counter event trigger (Prog22.dl8) Fig. 33. Press push button 2 to produce counts events • 6.12.5 Trigger schedule only while digital state is true (Prog23.dl8) Fig.

  • Page 27: Change Of Cv

    Press push button 1 to stop schedule scanning • 6.12.6 Trigger schedule by change of value of a CV (Prog24.dl8) Fig. 35. Send 1CV=1 and 1CV=0 commands from host PC (DeLogger text window) to trigger schedule Page 27...

  • Page 28: Alarms

    6.13 Alarms The features of the DT800’s alarms can be readily demonstrated on the SSP, for example (Prog25.dl8) Fig. 36. Fig. 37. Increase and decrease the voltage by rotating potentiometer 1. The LED on digital channel 3 will illuminate when the input voltage on channel 1 exceeds 1000mV. A message is also sent to the host computer if the setpoint threshold is exceeded.

  • Page 29: Further Help And Support

    For details of the dataTaker programming language, wiring configurations and capabilities please consult your dataTakers User’s Manual. All software, manuals etc. for use with your dataTaker can be down loaded from our web page www.dataTaker.com If further technical support is required, please contact your local dataTaker dealer or our technical support staff at the following email addresses.

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