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PICO PT-104 User Manual

Four-channel high-resolution temperature converter
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PT-104
Thermistor Converter
User's Guide
pt104.en-5
Copyright 2005-9 Pico Technology Ltd. All rights reserved.

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Summary of Contents for PICO PT-104

  • Page 1 PT-104 Thermistor Converter User's Guide pt104.en-5 Copyright 2005-9 Pico Technology Ltd. All rights reserved.

  • Page 2: Table Of Contents

    6 Agilent VEE 5 Technical reference .............................19 ............................19 1 Serial port settings ............................19 2 Serial port connections ............................20 3 Protocol information ............................22 4 Modem operation ............................22 5 Lookup table ..............................28 Index pt104.en Copyright 2005-9 Pico Technology Ltd. All rights reserved.

  • Page 3: Introduction

    Both inputs must be 0 V or above, though it does not matter which input has the higher voltage. For the 115 mV range, the accuracy may vary by 2%, and the temperature coefficient will be 100 ppm/°C. Copyright 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...

  • Page 4: 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 5: 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 6: 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. pt104.en Copyright 2005-9 Pico Technology Ltd. All rights reserved.

  • Page 7: 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 8 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. pt104.en Copyright 2005-9 Pico Technology Ltd. All rights reserved.
  • Page 9 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: Copyright 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...

  • Page 10: 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 100 per core. pt104.en Copyright 2005-9 Pico Technology Ltd. All rights reserved.
  • Page 11 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. Copyright 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...

  • Page 12: Driver Information

    PT-104 User's Guide 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 13: Pt104_Open_Unit

    Driver information 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: - the port must be 1 for COM1, 2 for COM2, and so on...

  • Page 14: Pt104_Get_Cycle

    Note: Each PT-104 is polled independently, so the cycle numbers for multiple PT-104s may not keep in step. Arguments: - a pointer to an array where the cycle numbers are stored cycle - the port number.

  • Page 15: Pt104_Set_Mains

    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 16: Pt104_Get_Version

    - driver version. The upper byte of the version is always 104 version 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.

  • Page 17: Pt104_Labview

    If an application is unable to find the DLL, try moving the drivers\win32 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 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...

  • Page 18: Writing Your Own Programs

    2. 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 19: 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 20: 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 XY trace. pt104.en Copyright 2005-9 Pico Technology Ltd. All rights reserved.

  • Page 21: Technical Reference

    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). The PT-104 uses the following RS232 data lines (pin connections as on PT-104).

  • Page 22: Protocol Information

    7: channel 4 gain ditto 0x03 bit 0: select 50/60 Hz mains 0 = 50 Hz, 1 = 60 Hz 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 23 To convert to voltage: result = (0x50000000 - SCALED_MIN ) * MAXINPUT) / FSD where MAXINPUT is the maximum input voltage in microvolts. To convert result to V divide result by 10,000,000.0 Copyright 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...

  • Page 24: 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 25 97.261345 97.652931 98.044401 98.435753 98.826989 99.218109 99.609112 100.000000 100.390772 100.781429 101.171970 101.562396 101.952706 102.342901 102.732980 103.122944 103.512792 103.902525 104.292142 104.681644 105.071030 105.460301 105.849456 106.238496 106.627420 107.016229 107.404922 107.793500 108.181962 108.570309 108.958540 Copyright 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...
  • Page 26 119.782122 120.167004 120.551770 120.936421 121.320956 121.705376 122.089680 122.473869 122.857942 123.241900 123.625742 124.009469 124.393080 124.776576 125.159956 125.543221 125.926370 126.309404 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 pt104.en Copyright 2005-9 Pico Technology Ltd. All rights reserved.
  • Page 27 141.914342 142.292525 142.670592 143.048544 143.426380 143.804101 144.181706 144.559196 144.936570 145.313829 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 Copyright 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...
  • Page 28 163.658020 164.029504 164.400872 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 pt104.en Copyright 2005-9 Pico Technology Ltd. All rights reserved.
  • Page 29 Technical reference 175.120309 175.488212 175.856000 Copyright 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...

  • Page 30: Index

    Visual Basic pt104_get_cycle pt104_get_driver_version pt104_get_unit_info pt104_get_value Windows XP (SP2)/Vista pt104_get_version pt104_labview pt104_open_unit pt104_poll_driver pt104_set_channel pt104_set_mains Excel Installation LabVIEW Legal information Linux Lookup table Modem operation Principles of operation Protocol pt104_close_unit pt104_get_cycle pt104.en Copyright 2005-9 Pico Technology Ltd. All rights reserved.
  • Page 31 Copyright 2005-9 Pico Technology Ltd. All rights reserved. pt104.en...
  • Page 32 Pico Technology James House Colmworth Business Park Eaton Socon ST. NEOTS Cambridgeshire PE19 8YP United Kingdom Tel: +44 (0) 1480 396 395 Fax: +44 (0) 1480 396 296 Web: www.picotech.com pt104.en-5 22.1.09 Copyright 2005-9 Pico Technology Ltd. All rights reserved.

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