USER'S GUIDE Vaisala Multiparameter Transmitter DPT145 for SF6 Gas M211371EN-D
PUBLISHED BY Vaisala Oyj Street address: Mailing address: Phone: Fax: Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland P.O. Box 26, FI-00421 Helsinki, Finland +358 9 8949 1 +358 9 8949 2227 Visit our Internet pages at www.vaisala.com.
_________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION ............................................................................ 7 About This Manual ................................................................... 7 Contents of This Manual ....................................................... 7 Version Information ............................................................... 8 Related Manuals .............................
User's Guide _______________________________________________________________________ Alternate Wiring for Power Supply ...................................... 29 Stabilization of Dewpoint Reading After Installation .......... 29 CHAPTER 5 OPERATION ................................................................................................. 30 Transmitter Start-Up ............................................................... 30 Serial Communication .....................................................
_________________________________________________________________________________ CHAPTER 7 TROUBLESHOOTING ................................................................................. 50 Solving Typical Problems...................................................... 50 Error Messages ...................................................................... 51 Unknown Serial Settings ....................................................... 52 Technical Support ..............................................
User's Guide _______________________________________________________________________ List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 DPT145 with DILO DN20 Adapter ............................................ 14 DPT145 Transmitter Parts and Adapters ................................. 15 Weather Shield .........................................................................
Chapter 1 _________________________________________________________ General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the manual and the DPT145. About This Manual This manual provides information for installing, operating, and maintaining Vaisala Multiparameter Transmitter DPT145 for SF6 Gas.
User's Guide _______________________________________________________________________ Version Information Table 1 Manual Code M211371EN-C M211371EN-C Manual Revisions Description This manual. Added a minimum baud rate requirement when using the Modbus protocol. Added a packing recommendation for return shipment. Previous version.
Chapter 1 _________________________________________________________ General Information Safety The DPT145 transmitter delivered to you has been tested for safety and approved as shipped from the factory. Note the following precautions: WARNING Ground the product and verify outdoor installation grounding periodically to minimize shock hazard. CAUTION Do not modify the unit. Improper modification can damage the product or lead to malfunction. CAUTION Do not drop or hit the transmitter.
User's Guide _______________________________________________________________________ ESD Protection Electrostatic Discharge (ESD) can cause immediate or latent damage to electronic circuits. Vaisala products are adequately protected against ESD for their intended use. It is possible to damage the product, however, by delivering electrostatic discharges when touching, removing, or inserting any objects inside the equipment housing.
Chapter 1 _________________________________________________________ General Information Regulatory Compliances The Vaisala Multiparameter Transmitter DPT145 for SF6 Gas is in conformity with the provisions of the following EU directive(s): - EMC-Directive Conformity is shown by compliance with the following standards: - EN 61326-1: Electrical equipment for measurement, control, and laboratory use – EMC requirements – for use in industrial locations.
User's Guide _______________________________________________________________________ Software License This product contains software developed by Vaisala. Use of the software is governed by license terms and conditions included in the applicable supply contract or, in the absence of separate license terms and conditions, by the General License Conditions of Vaisala Group. Warranty Visit our Internet pages for more information and our standard warranty terms and conditions: www.vaisala.com/warranty.
Chapter 2 ___________________________________________________________ Product Overview CHAPTER 2 PRODUCT OVERVIEW This chapter introduces the features, advantages, and the product nomenclature. Introduction to DPT145 Vaisala Multiparameter Transmitter DPT145 for SF6 Gas is a digital transmitter with a non-isolated RS-485 output. Its compact size makes it well suited for integration into OEM systems.
User's Guide _______________________________________________________________________ Basic Features and Options - Utilizes the Vaisala MPS1 multiparameter sensor with Vaisala’s BAROCAP® and DRYCAP® technologies. - Measurement ranges of measured parameters: - Dewpoint -50 ... +30 °C (-58 ... +86 °F) Td - Pressure, absolute 1 ... 12 bar (14.5 ... 174 psi) - Temperature -40 ... +80 °C (-40 ... +176 °F) - Measurement is configurable for pure SF6 or mixed gas. - Non-isolated RS-485 digital output.
Chapter 2 ___________________________________________________________ Product Overview Transmitter Parts 1 3 2 4 7 6 5 8 1107-033 Figure 2 1 2 3 4 5 DPT145 Transmitter Parts and Adapters = = = = = Port I: Supply voltage only (optional) Port II: RS-485 line and supply voltage Type label Connection between transmitter body and adapter – do not open DILO DN20 adapter: 50 mm nut with M45X2 inner thread / DILO DN8 adapter: 32 mm nut with M26X1.
User's Guide _______________________________________________________________________ Weather Shield The transmitter and its connectors are rated IP65. However, installing the transmitter outside without protection is not recommended. The installation should be such that the transmitter is not exposed to direct rain, icing, or solar radiation. A suitable weather shield is available from Vaisala. The weather shield is designed to clamp over the adapter, and to accommodate the available cable options.
Chapter 3 _______________________________________________________ Functional Description CHAPTER 3 FUNCTIONAL DESCRIPTION This chapter describes the primary application and the sensor technology of DPT145. Measurement Needs of SF6 Insulation Sulphur hexafluoride (SF6) is used as an insulating gas in transmission and distribution equipment such as switchgears and circuit breakers. It effectively prevents arcing during switch-offs and protects equipment from failures.
User's Guide _______________________________________________________________________ Sensor Technology MPS1 Multiparameter Sensor DPT145 combines Vaisala’s proven DRYCAP® sensor technology for industrial dewpoint measurement with BAROCAP® pressure sensor technology. Both technologies are integrated on the same MPS1 multiparameter sensor element, allowing for a highly compact and versatile transmitter.
Chapter 3 _______________________________________________________ Functional Description Auto-Calibration The auto-calibration feature of the MPS1 multiparameter sensor is an automatic procedure which greatly reduces the possible drift in the dry end of the dewpoint measurement. It is performed at one hour intervals, and when the power is switched on. During auto-calibration the sensor is warmed for a short period (< 1 min) and the sensor capacitance values are evaluated at the elevated temperature.
User's Guide _______________________________________________________________________ DPT145 Start-up Sequence When the transmitter is powered up, it will perform the sequence shown in Figure 5 below. After a five-second startup, the transmitter will measure normally for five minutes, after which it will perform the sensor purge and auto-calibration functions. This can take up to six minutes, during which time the output is frozen: it will display the last measured values before the sensor purge began.
Chapter 4 ________________________________________________________________ Installation CHAPTER 4 INSTALLATION This chapter provides you with information that is intended to help you install the DPT145. Transmitter Configuration Before Installation Depending on your application, you may need to configure some transmitter features before physically installing it. 1. 2. 3. By default, DPT145 transmitters are configured for single transmitter operation. Serial operation mode is STOP and address is 0.
User's Guide _______________________________________________________________________ Selecting the Location Online dewpoint measurement in still gas is much more demanding than pressure or temperature measurement. A very tight installation is crucial: not only pressure tight, but also vapor tight. It is always best to connect the transmitter directly to the main SF6 gas volume, not behind a sampling line. Avoid extension pipes, T-pieces, and multi-connection points.
Chapter 4 ________________________________________________________________ Installation Warning – Read Before Installation CAUTION Do not drop or hit the transmitter. The sensor is fragile and may break from a sudden shock. When transporting the transmitter, use the original shipping box from Vaisala. CAUTION Do not open the connection between the adapter and the transmitter. They are connected at the factory, and the connection should remain unopened to guarantee tightness.
User's Guide _______________________________________________________________________ Installation Without Weather Shield 1. Remove the yellow transport protection plug when you are ready to install the transmitter. 2. Install the transmitter to the mechanical coupling and tighten by hand. 3. Use a wrench to tighten the connection. Turn from the adapter, not from the transmitter body! Use sufficient force to achieve a tight installation. The system must be leak-free for accurate measurement. 4.
Chapter 4 ________________________________________________________________ Installation Installation With Weather Shield 1. When DPT145 is ordered with the weather shield, the transmitter is delivered already attached to the shield. If you have ordered the weather shield separately, attach the transmitter to the weather shield before continuing this procedure. Fit the clamp of the weather shield over the adapter, not the transmitter body.
User's Guide _______________________________________________________________________ 4. Install the transmitter to the mechanical coupling and tighten by hand. Try to keep the weather shield level. 5. Use a wrench to tighten the connection. Turn from the adapter, not from the transmitter body! Use sufficient force to achieve a tight installation. The system must be leak-free for accurate measurement.
Chapter 4 ________________________________________________________________ Installation 6. Connect the cable to port II on the transmitter, and route the cable to the cable clamp on the underside of the weather shield. Attach the cable using a crosshead screwdriver. Note: Let some of the cable hang from the back of the transmitter, so that condensation cannot run along the cable to the transmitter.
User's Guide _______________________________________________________________________ Wiring Standard Wiring Connect supply voltage and RS-485 to port II. Port I does not need to be used at all, and can remain covered. 2 4 1 3 1 + 2 - 15 ...
Chapter 4 ________________________________________________________________ Installation Alternate Wiring for Power Supply If necessary, you can provide supply voltage using Port I, and only wire RS-485 for Port II. Do not supply power from both ports. 2 1 4 3 1 = VDC+ + 3 = GND - 15 ... 28 VDC 1108-016 Figure 9 Wiring Power Supply Using Port I Stabilization of Dewpoint Reading After Installation After installation, the transmitter will have a small amount of moisture inside it.
User's Guide _______________________________________________________________________ CHAPTER 5 OPERATION This chapter contains information that is needed to operate the DPT145. Transmitter Start-Up When the transmitter is connected to power supply, there is a delay of five seconds as the transmitter starts up. After the start-up is complete, the transmitter will behave according to the configured serial mode: - In STOP mode, the transmitter outputs the transmitter model and software version.
Chapter 5 _________________________________________________________________ Operation Serial Communication Connecting to the Serial Interface DPT145 can be connected to a PC using the RS-485 line on Port II. It is recommended that you use the USB service cable (Vaisala order code 219690) for the connection, since the cable also provides the operating power from the USB port. If you have not used the USB service cable before, install the driver that came with the cable.
User's Guide _______________________________________________________________________ Terminal Application Settings The serial interface settings of the DPT145 RS-485 line are presented in Table 4 below. Table 4 Property Baud rate Parity Data bits Stop bits Flow control Default Serial Interface Settings Description / Value 19200 None 8 1 None The steps below describe how to connect to the DPT145 using the PuTTY terminal application for Windows (available for download at www.vaisala.
Chapter 5 _________________________________________________________________ Operation 0807-004 Figure 10 PuTTY Terminal Application List of Serial Commands All commands can be issued either in uppercase or lowercase. In the command examples, the keyboard input by the user is in bold type. The notation refers to pressing the carriage return (Enter) key on your computer keyboard. Enter a to clear the command buffer before starting to enter commands.
User's Guide _______________________________________________________________________ Command SERI [baud p d s] SMODE [mode] SNUM TIME UNIT [m/n] VERS PNORMT [-100 ... 100] MIXRATIO [0 ...
Chapter 5 _________________________________________________________________ Operation Show Currently Active Errors Use the ERRS command to display the currently active transmitter error messages. Possible errors and their causes are listed in Table 11 on page 51.
User's Guide _______________________________________________________________________ Show Firmware Version VERS Example: vers DPT145 1.0.23 Show Serial Number SNUM Example: snum Serial number : F4040007 Serial Line Output Commands Start Measurement Output Use the R command to start the continuous outputting of measurement values as an ASCII text string to the serial line. The format of the measurement message is set with the FORM command.
Chapter 5 _________________________________________________________________ Operation Set Output Interval Use the INTV command to change the output interval of the automatically repeating measurement messages. The measurement messages are repeated in the RUN mode, or after the R command has been given. INTV [n xxx] where n xxx = = time interval, range 0 ...
User's Guide _______________________________________________________________________ Configuring Measurement Parameters Set Mixing Ratio Use the MIXRATIO command to set the mixing ratio of SF6 and the other gas. MIXRATIO [ratio] where ratio = Amount of SF6 in the measurement environment, range 0 ... 100%. Example: mixratio 50 MIX RATIO : 50.00 % Set Molar Weight of Other Gas Use the N2MOLW command to set the molar weight of the other gas (not SF6) in the measurement environment.
Chapter 5 _________________________________________________________________ Operation Set Measurement Output Format Use the serial line command FORM to change the measurement message sent by the transmitter. You can freely define the output message to include the desired parameters, formatting options, text strings, and additional fields. FORM [modifier string] where modifier string = String of parameters and modifiers that defines the output format, length 1 ... 153 characters.
User's Guide _______________________________________________________________________ Table 6 FORM Command Parameters Measured Parameter Dewpoint/frost point temperature Dewpoint/frost point temperature, converted to atmospheric pressure ppm moisture, by volume Pressure, absolute Pressure, normalized Density Temperature Table 7 Modifier x.
Chapter 5 _________________________________________________________________ Operation Select Unit Use the UNIT command to select metric or non-metric output units. UNIT [x] where x = Selects the unit type to output: m = metric units, for example, Celsius n = nonmetric units, for example, Fahrenheit Example: unit m Units : Metric Configuring Serial Line Operation Set Serial Line Operating Mode Use the SMODE command to set the start-up operating mode of the serial line.
User's Guide _______________________________________________________________________ Selected output mode will be activated at next reset or power up. Example: smode poll Serial mode : POLL Set Serial Line Settings Use the SERI command to set the serial line settings. The new settings will be taken into use when the transmitter is reset or powered up. Note that changing the serial line settings will slightly alter how the transmitter works with the MI70 indicator.
Chapter 5 _________________________________________________________________ Operation Example: addr Address : 0 ? Set Serial Line Response Time With the SDELAY command you can set delay (response time) of the serial line, or view the currently set delay value. Increasing the value by one increases the delay by 4 milliseconds. For example, the default value is 10 which equals a ~40 ms answer delay. SDELAY [delay] where delay = Serial line delay, range 0 … 255.
User's Guide _______________________________________________________________________ Closing the Connection to a Transmitter in POLL Mode The CLOSE command closes the connection to a transmitter. CLOSE Example: close line closed Show Transmitter Uptime Use the TIME command to show how long the transmitter has been operating since it was last reset or powered up. TIME Example: time Time : 00:51:41 Reset Transmitter Use the RESET command to reset the transmitter.
Chapter 5 _________________________________________________________________ Operation Modbus Communication Addressing with Modbus Protocol The Modbus variant used in DPT145 communication is Modbus RTU. An example of Modbus addressing is shown below. Request: 0x01 0x03 0x00 0x04 addr. func. reg. 5 Response: 0x01 0x03 0x04 0xBC 0xC0 0x41 0xC2 0x6E 0x5E addr. func. len. reg. 5 reg.
User's Guide _______________________________________________________________________ Configuration Commands Related to Modbus In addition to enabling the Modbus protocol in the device, Modbus over RS-485 needs the following software settings: serial bit rate, parity, number of stop bits, and Modbus device address. Use the service commands listed in Table 9 below to configure the Modbus RTU using the USB service cable.
Chapter 6 _______________________________________________________________ Maintenance CHAPTER 6 MAINTENANCE This chapter provides information that is needed in basic maintenance of the DPT145. Periodic Maintenance Cleaning The body of the transmitter can be cleaned by wiping with a moistened lint-free cloth. Do not immerse the transmitter in liquid, and do not use cleaning agents or solvents. Calibration and Adjustment DPT145 is fully calibrated as shipped from factory.
User's Guide _______________________________________________________________________ NOTE In the procedure below, the readings of the transmitter and the reference probe are checked simultaneously. You can also check the reference probe and the DPT145 separately if they cannot be connected at the same time. Perform the check as follows: 1. Place the reference probe and the DPT145 in the reference environment. 2.
Chapter 6 _______________________________________________________________ Maintenance 9. NOTE If adjustment is required, contact a Vaisala Service Center or your local Vaisala representative to have the DPT145 adjusted. Some notes on using the MI70 indicator with the DPT145: - If you disconnect the DPT145 while the MI70 indicator is on, the quantities measured will remain on the screen, but no measurement will be shown. - Temperature measured by the DPT145 is shown as parameter Ta (not T) in the MI70.
User's Guide _______________________________________________________________________ CHAPTER 7 TROUBLESHOOTING This chapter describes common problems, their probable causes and remedies, and provides contact information for technical support. Solving Typical Problems Some problems can be solved by simply resetting the transmitter. You can reset the transmitter by disconnecting the power or issuing the RESET command using the service port.
Chapter 7 ____________________________________________________________ Troubleshooting Error Messages The transmitter has error codes that can be displayed on the serial line using the ERRS command. See section Show Currently Active Errors on page 35.
User's Guide _______________________________________________________________________ Unknown Serial Settings If you are not sure what the current serial settings of your transmitter are, follow the steps below to connect to the transmitter. This procedure assumes you have the USB service cable available. For more information on the USB service cable and the PuTTY terminal application, see section Serial Communication on page 31. 1. 2. 3. 4. 5.
Chapter 7 ____________________________________________________________ Troubleshooting Product Returns If the product must be returned for service, see www.vaisala.com/returns. It is important to protect the product from damage during the return shipment: - Put the yellow transport protection cap on the sensor head, if available. - Pack the product in the original product package.
User's Guide _______________________________________________________________________ CHAPTER 8 TECHNICAL DATA This chapter provides the technical data of the DPT145. Specifications Table 12 Measured Parameters Parameter Dewpoint Pressure, absolute Temperature Table 13 Calculated Parameters Parameter Pressure, normalized to 20 °C (68 °F) SF6 or SF6/N2 mixture density ppm moisture, by volume Dewpoint, converted to atmospheric pressure Table 14 Measured Range -50 ... +30 °C (-58 ... +86 °F) 1 ...
Chapter 8 _____________________________________________________________ Technical Data 40 Dewpoint temperature (°C) 30 Not recommended for continuous measurement 20 10 0 -10 Accuracy ±3 °C Td -20 -30 -40 -50 Accuracy not specified -60 -70 Dewpoint measurement low limit -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Temperature of measured gas (°C) 1107-032 Figure 12 DPT145 Dewpoint Measurement Accuracy Table 15 Operating Environment Property Operating temperature of electronics Descript
User's Guide _______________________________________________________________________ Table 17 General Property Sensor Operating voltage Supply current during normal measurement during self-diagnostics Housing material Housing classification Storage temperature range transmitter only shipment package Mechanical connection Weight (with DILO adapter) Electromagnetic compatibility Tested levels EN/IEC 61000-4-2, Electrostatic Discharge EN/IEC 61000-4-3, RF field immunity EN/IEC 61000-4-4, Electric Fast Tran
Chapter 8 _____________________________________________________________ Technical Data Spare Parts and Accessories Table 18 DPT145 Spare Parts and Accessories Description Connection cable for MI70 Indicator / DM70 Dewpoint Meter USB connection cable Protection plug for connector 1.5 m shielded PUR cable with 90° connector 3m shielded PUR cable with 90° connector 5 m shielded PUR cable with 90° connector 10 m shielded PUR cable with 90° connector 3.
User's Guide _______________________________________________________________________ 1311-249 DPT145 with DILO DN8 Adapter M30x2 AW27 20 29.5 Figure 14 7 53.5 63.5 41.6 145.
29.5 Chapter 8 _____________________________________________________________ Technical Data G1/2 ISO 228-1 6 AW27 20 7 5 60 70 152 33 1108-019 Figure 16 DPT145 with Alstom G1/2" Adapter 37 52 8 44 80 44 30 200 AW8 4 .
User's Guide _______________________________________________________________________ APPENDIX A MODBUS REFERENCE This appendix describes the Modbus protocol implementation of the DPT145 transmitters. Default Communication Settings Table 19 below shows the default communication settings when Modbus is enabled at the factory.
Appendix A _________________________________________________________ Modbus Reference Modbus Register Map Table 21 Modbus Register Map Logical Address (decimal) 5 6 7 8 11 12 21 22 45 46 47 48 49 50 513 PDU Address (hexadecimal) Register Description 00 04 00 05 00 06 00 07 00 0A 00 0B 00 14 00 15 00 2C 00 2D 00 2E 00 2F 00 30 00 31 02 00 T (measured) 514 02 01 Online status 516 517 775 776 781 782 783 784 02 03 02 04 03 06 03 07 03 0C 03 0D 03 0E 03 0F 1283 05 02 Molar mass of other gas (set
User's Guide _______________________________________________________________________ Table 22 Object Id (decimal) Object Id (hexadecimal) 0 1 2 3 4 00 01 02 03 04 Device Identification Objects Object Name (as defined by the specification) VendorName ProductCode MajorMinorVersion VendorUrl ProductName 128 80 SerialNumber* 129 81 CalibrationDate* 130 82 CalibrationText* * Vaisala-specific device information object NOTE Example Vaisala DPT145 1.3.27 http://www.vaisala.
www.vaisala.
