Swagelok PTX User Manual
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Swagelok PTX User Manual

Pressure and temperature transducer
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Pressure and
Temperature
Transducer (PTX)
User's Manual
This manual contains important information for the safe and
effective operation of the Swagelok
®
Pressure and Temperature
Transducer, PTX series. Users should read and understand its
contents before operating the transducer.

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Summary of Contents for Swagelok PTX

  • Page 1 Pressure and Temperature Transducer (PTX) User’s Manual This manual contains important information for the safe and effective operation of the Swagelok ® Pressure and Temperature Transducer, PTX series. Users should read and understand its contents before operating the transducer.

  • Page 2: Table Of Contents

    Pressure and Temperature Transducer User’s Manual Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Product Information .

  • Page 3: Introduction

    MEMS pressure‑sensing technology. It communicates pressure and temperature data via the DeviceNet industrial network protocol. The PTX is available with a 1.5 in. Swagelok Modular Platform Component (MPC) surface mount in accordance with ANSI/ISA 76.00.02 or with 1/4 in. Swagelok tube fitting connections.

  • Page 4: Specifications

    It is compatible with 125 kbaud, 250 kbaud, and 500 kbaud rates. Baud Rates Note: Before installing the PTX in a hazardous location, review the control drawing on page 5. This will help ensure all electrical connections to and from the PTX comply with safety requirements.

  • Page 5: Control Drawing

    Pressure and Temperature Transducer User’s Manual Control Drawing Fig. 3 PTX-DN-0006 SCHEDULE...

  • Page 6: Installation

    Swagelok Tube Fitting Instructions for 1 in. (25 mm) and smaller fittings, MS‑12‑01. A PTX with a 1.5 in. Swagelok MPC modular surface mount should be installed in the system according to the surface mount assembly instructions in the MPC Series Modular Platform Components Assembly and Service Instructions, MS‑12‑39.

  • Page 7: Power Supply

    28 V (dc). Hazardous Location Power Supply It is required that a Class 2 power supply be used when the PTX is used in Class I, Division 2 hazardous locations. Class 2 power supplies have a maximum power outlet of 100 W.

  • Page 8: Setup

    6. Set the device address (MAC ID) of the device to the desired value. Device Address (MAC ID) The PTX will have a factory set address of 63 when initially powered on. Addresses between 0 and 63 are valid DeviceNet addresses. Do not duplicate addresses. Duplicate addresses will cause the devices at that address to be unable to communicate with the network.

  • Page 9: Parameter Setup

    Pressure and Temperature Transducer User’s Manual Parameter Setup Open the parameters menu after the device is recognized by the configuration software. Set the parameters that follow as desired for use with your network. Fig. 7 Parameters Tab...
  • Page 10 Pressure and Temperature Transducer User’s Manual Message Format The PTX supports several message formats as defined below. Each message format contains different information and results in a different amount of network traffic. The truncated integer values use fewer bytes to encode, resulting in less network traffic.
  • Page 11 Fig. 9 Set Units Set Alarms The PTX can be set to send an alarm when the pressure or temperature falls below, or rises above, a certain value. Additionally, alarm hysteresis and settling time can be set. Note: The units for the alarms will be the same as those set in Set Units.
  • Page 12 Set Averaging Time The PTX allows the averaging time of the measured value to be set. This allows the user to implement a type of low pass filtering on the measured data, removing transient measurements from the reported values. This parameter is entered as the amount of time over which the measurements will be averaged in milliseconds (msec).

  • Page 13: Operation

    2. Allow the PTX to stabilize to the temperature and atmospheric pressure of the environment in which it is installed. 3. With 0 psig applied to the PTX, retrieve a series of measurements (10 or more) from the PTX and average them together. This average is call the zero compensation offset.

  • Page 14: Poll Request

    Bit 2: TUR—Temperature Under Alarm Trip Point Bit 1: TOR—Temperature Over Alarm Trip Point The alarms on the PTX can be reset by sending a Reset Byte to the device. The format should be as follows: Reset Byte Bit 7...

  • Page 15: Troubleshooting

    General The PTX measures pressure within a tolerance of ± 1 % of the full scale range of the device. Measurement is within of tolerance band. A reading of 0.5 psig (0.03 bar) for a 50 psig (3.4 bar) PTX is normal even when system...

  • Page 16: Glossary

    MOD LED Module LED, a light that provides feedback on the status of the module NET LED Network LED, a light that provides feedback on the status of the PTX network connection Programmable Logic Controller Swagelok—TM Swagelok Company DeviceNet—TM ODVA RSNetWorx—TM Rockwell Automation, Inc.

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