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PICO PT-104 User Manual

Temperature converter
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PT-104
Temperature Converter
User Guide
Copyright 2005 Pico Technology Limited. All rights reserved.
PT104-2

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Summary of Contents for PICO PT-104

  • Page 1 PT-104 Temperature Converter User Guide Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...

  • Page 2: Table Of Contents

    5 Visual Basic ....................21 6 Agilent-VEE .....................22 5 Technical reference ....................22 1 Serial port settings ....................22 2 Serial port connections ....................23 3 Protocol information ....................25 4 Modem operation ....................26 5 Lookup table PT104-2 Copyright 2005 Pico Technology Limited. All rights reserved.
  • Page 3 Contents ......................31 Index Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...

  • Page 4: Introduction

    PT-104 Help Introduction Overview The PT-104 is a four-channel, high-resolution temperature converter for use with PT100 and PT1000 type sensors. It can be used to measure temperature, resistance and voltage. In PT100/PT1000/resistance mode, the unit uses a four- wire circuit.

  • Page 5: Safety Warning

    Maximum input range The PT-104 is designed to measure voltages in the range 0 to +2.5 V. Any voltages in excess of ±30 V may cause permanent damage to the unit.

  • Page 6: Legal Information

    The licensee agrees to allow access to this software only to persons who have been informed of these conditions and agree to abide by them. Usage The software in this release is for use only with Pico products or with data collected using Pico products. Copyright Pico Technology Limited claims the copyright of, and retains the rights to, all material (software, documents etc.) contained in this release.

  • Page 7: Product Information

    For four-wire temperature and resistance measurement** Installing the driver The driver is installed automatically when you install the PicoLog software. Alternatively, you can download the driver from our website at http://www.picotech.com. Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...

  • Page 8: Connection

    Channel Note on Differential Voltage Mode: The maximum input voltage range of the PT-104 is 2.5 V. Any voltage in excess of +/- 30 V on any input pin may cause permanent damage to the unit. In Differential Voltage Mode, the input connector should be treated as a differential input with reference to ground.
  • Page 9 From the PicoLog Recorder File menu, select New settings. The Recording dialog box appears: Click OK. The Sampling Rate dialog box appears: Click OK. The Converter details dialog box appears: From the Converter type drop-down list, select PT-104 Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...
  • Page 10 Select the data type required i.e temperature, resistance or voltage Select circuit - for PT100 and PT1000 10. Now click OK. Readings from the PT-104 should appear in the monitor window: PT104-2 Copyright 2005 Pico Technology Limited. All rights reserved.

  • Page 11: Background On Prts

    When using long cables, it is necessary to check that the measuring equipment is capable of handling the resistance of the cables. Most equipment can cope with up to per core. Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...
  • Page 12 PRT sensor cables: the one or two wires atttached to one end of the sensor are red, and the one or two wires at the other end are white. PT104-2 Copyright 2005 Pico Technology Limited. All rights reserved.

  • Page 13: Driver Information

    Driver information Driver information Introduction The PT-104 is supplied with driver routines that you can build into your own programs. Once you have installed the software, the directory contains the drivers and Drivers a selection of examples of how to use the drivers. It also contains a copy of this manual as a PDF file.

  • Page 14: Pt104_Open_Unit

    PT-104 Help pt104_open_unit short pt104_open_unit ( short port ); This routine specifies the serial port number with a PT-104 unit. If you wish to use more than one PT-104, you should call the routine once for each PT-104. Arguments: port...

  • Page 15: Pt104_Get_Cycle

    Note: Each PT-104 is polled independently, so the cycle numbers for multiple PT-104s may not keep in step. Arguments: cycle...
  • Page 16 This routine is used to select the mains frequency of 50 or 60 Hz. Choosing the incorrect frequency may increase susceptibility to electrical noise. Arguments: sixty_hertz - for 50 Hz set this to 0 - for 60 Hz set this to 1 Returns: none PT104-2 Copyright 2005 Pico Technology Limited. All rights reserved.
  • Page 17 Once you open the driver and define some channels, the driver begins to take continuous readings from the PT-104. When you call this routine, it immediately sets data to the most recent reading for the specified channel. Temperatures are returned in thousandths of a degree Celsius, voltages in the 2.5 V range are returned in tens of nanovolts (2.5 V returned as 250 000 000 * 10 nV),...

  • Page 18: Pt104_Get_Version

    - driver version. The upper byte of the version is always 104 for a PT- 104; the lower byte is the two hex digits of the version and release. It provides a useful check that the link to the PT-104 is working correctly port - the port number.

  • Page 19: Pt104_Labview

    If an application is unable to find the DLL, try moving the DLL to windows\system. 3.14 Linux At time of release, Linux is not supported. Please check http://www.picotech.com/drivers.html for updates. Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...

  • Page 20: Writing Your Own Programs

    Include the file in the source file(s) of your program. pt104.h file can be used to demonstrate using the PT-104 driver program pt104tes.c within a Windows application. You will also need to include the resource file pt104tes.rc. For Microsoft Visual C versions 2, 4 and 5, Microsoft no longer supply...

  • Page 21: Delphi

    You will then use the PT-104 sub-vi, and an example sub-vi which demonstrates how to use them. You can use one of these sub-vis for each of the channels that you wish to measure. The sub-vi accepts the port (1 for COM1), the channel (1 to 4) the PRT type (1 for PT100, 2 for PT1000).

  • Page 22: Visual Basic

    File Name path is set to the location of pt10432.dll Definition File path is set to the location of pt104.vh The example program collects 1000 readings from the PT-104 and displays them on an x-y trace. PT104-2 Copyright 2005 Pico Technology Limited. All rights reserved.

  • Page 23: Technical Reference

    4. These can be obtained either from Pico Technology or your computer supplier. Serial port connections The information presented here is necessary only if you wish to connect the PT-104 to the PC in some unusual way (for example, via a radio modem).

  • Page 24: Protocol Information

    7: channel 4 gain ditto 0x03 bit 0: select 50/60 Hz mains 0 = 50Hz, 1 = 60Hz Responses At start-up, and on receipt of a version request, the PT-104 sends a version response. Byte Value Product type Version On receipt of a Start Converting request, the PT-104 starts sending conversion responses - approx one every 180 milliseconds.
  • Page 25 2500000 is the maximum input voltage in microvolts where is a fixed gain factor. GAIN 0x10000000 is FSD for a 28-bit ADC To convert the result to mV divide by 10 000.0 = 35.7142 Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...

  • Page 26: Modem Operation

    Modem operation The PT-104 is normally connected directly to the computer, but it is also possible to access the PT-104 via a modem using the Windows driver. It is necessary to provide power to the PT-104, either by instructing the modem to provide power or by connecting a power supply directly to the PT-104.

  • Page 27: Lookup Table

    87.827140 88.221657 88.616046 89.010309 89.404445 89.798455 90.192339 90.586099 90.979734 91.373246 91.766634 92.159898 92.553041 92.946061 93.338960 93.731737 94.124394 94.516930 94.909346 95.301643 95.693820 96.085879 96.477819 96.869641 97.261345 97.652931 98.044401 98.435753 98.826989 99.218109 99.609112 Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...
  • Page 28 107.404922 107.793500 108.181962 108.570309 108.958540 109.346656 109.734656 110.122541 110.510310 110.897964 111.285502 111.672925 112.060232 112.447424 112.834500 113.221461 113.608306 113.995036 114.381650 114.768149 115.154532 115.540800 115.926952 116.312989 116.698910 117.084716 117.470406 117.855981 118.241440 118.626784 119.012012 PT104-2 Copyright 2005 Pico Technology Limited. All rights reserved.
  • Page 29 126.692322 127.075125 127.457812 127.840384 128.222840 128.605181 128.987406 129.369516 129.751510 130.133389 130.515152 130.896800 131.278332 131.659749 132.041050 132.422236 132.803306 133.184261 133.565100 133.945824 134.326432 134.706925 135.087302 135.467564 135.847710 136.227741 136.607656 136.987456 137.367140 137.746709 138.126162 Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...
  • Page 30 145.690972 146.068000 146.444912 146.821709 147.198390 147.574956 147.951406 148.327741 148.703960 149.080064 149.456052 149.831925 150.207682 150.583324 150.958850 151.334261 151.709556 152.084736 152.459800 152.834749 153.209582 153.584300 153.958902 154.333389 154.707760 155.082016 155.456156 155.830181 156.204090 156.577884 156.951562 PT104-2 Copyright 2005 Pico Technology Limited. All rights reserved.
  • Page 31 164.772125 165.143262 165.514284 165.885190 166.255981 166.626656 166.997216 167.367660 167.737989 168.108202 168.478300 168.848282 169.218149 169.587900 169.957536 170.327056 170.696461 171.065750 171.434924 171.803982 172.172925 172.541752 172.910464 173.279060 173.647541 174.015906 174.384156 174.752290 175.120309 175.488212 175.856000 Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...
  • Page 32 Safety warning pt104_get_version Serial port settings pt104_labview Specifications pt104_open_unit pt104_poll_driver pt104_set_channel pt104_set_mains Visual Basic Excel Windows 95/98/ME HP-Vee Installation LabVIEW Legal information Linux Lookup table Modem operation Copyright 2005 Pico Technology Limited. All rights reserved. PT104-2...
  • Page 33 Interworld Electronics & Computers Inc. P.O. Box 1280 145 Tyee Drive, Suite 3120 Point Roberts, WA 98281 Tel: 1-877-902-2979 Fax: 1-877-FAX-IECI Web: www.interworldna.com PT104-2 2.12.05...

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