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Met One Instruments 597A Operation Manual

Temperature / relative humidity / barometric pressure sensor
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MODEL 597A
Temperature / Relative Humidity /
Barometric Pressure Sensor
Operation Manual
Document No. 597A-9800 Rev A
Met One Instruments, Inc
1600 NW Washington Blvd.
Grants Pass, Oregon 97526
Tel: (541) 471-7111
Fax: (541) 471-7116
597A-9800 Manual Rev A

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Summary of Contents for Met One Instruments 597A

  • Page 1 MODEL 597A Temperature / Relative Humidity / Barometric Pressure Sensor Operation Manual Document No. 597A-9800 Rev A Met One Instruments, Inc 1600 NW Washington Blvd. Grants Pass, Oregon 97526 Tel: (541) 471-7111 Fax: (541) 471-7116 597A-9800 Manual Rev A...
  • Page 2 Copyright Notice Model 597A Relative Humidity / Temperature / Barometric Pressure Sensor Manual. © Copyright 2019 Met One Instruments, Inc. All Rights Reserved Worldwide. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language in any form by any means without the express written permission of Met One Instruments, Inc.
  • Page 3 The user assumes all liability associated with the use of this instrumentation. The seller further disclaims any responsibility for consequential damages. 597A-9800 Manual Rev A...

  • Page 4: Table Of Contents

    5.2. Siting ........................3 5.3. Wiring ........................3 Specifications* ...................... 4 Sensor Verification ....................5 Serial Communications ..................5 Maintenance ......................7 10. Service ........................7 11. Wiring Diagrams ....................8 12. Terminal Mode and SDI Commands ..............10 597A-9800 Manual Rev A...

  • Page 6: Introduction

    2 inches (IPS) in diameter. The Model 597A is supplied with output terminals that digital output signals in several formats.

  • Page 7: Product Overview

    The 597A ships from Met One Instruments pre-wired for digital output signals including RS-- 232, RS-485 and SDI-12. The 597A also includes voltage outputs for AT/RH/BP, and an ID voltage used by some Met One monitors and dataloggers to identify the sensor. The voltage outputs are 0-2.5VDC default, and can be changed to 0-1VDC or 0-5VDC.

  • Page 8: Installation

    2.0 m (EPA) 5.3. Wiring The 597A is ordered with a 10547 analog output cable assembly, or 10548 digital output cable assembly (sold separately). Individual wire leads connect the 597A to a data logger, signal conditioner, or programmable logic controller.

  • Page 9: Specifications

    -50 °C to +70 °C • Humidity: 0 to 100 % PHYSICAL • Diameter: 7 in (178 mm) • Length: 8 in (203 mm) • Weight: 5 lb (2.3 kg) (1) At 25°C 597A-9800 Manual Rev A Page | 4...

  • Page 10: Sensor Verification

    Barometric Pressure Config. & Status Check Sum The 597A will report data at a rate set using the “OI” user command (see Section 12 for command details), and is typically set to one second. An example output string is shown below.
  • Page 11 SDI-12 commands. Please see appendix E for a list of supported SDI commands. The default SDI Address for the 597A is zero. Please consult your data-logger manual for more information on SDI interfaces or call Met One for additional help.

  • Page 12: Maintenance

    Return the sensor to Met One Instruments, Inc. for factory inspection and calibration. 10. Service The 597A is not field repairable and should be returned to the factory for service. Detailed calibration & service information and pricing are available from the Met One Instruments, Inc.

  • Page 13: Wiring Diagrams

    PIN NO WIRE COLOR WIRE LABEL DESCRIPTION +12VDC +9 to +36 VDC Black Signal Ground Orange Ana Gnd Analog Ground Brown RH Analog Output Green ID Voltage White BP Analog Output Blue AT Analog Output Page 8 597A-9800 Manual Rev A...
  • Page 14 SDI-12 Output Green SIG GND Signal Ground White RS-232 Tx RS-232 Transmit Brown RS-232 Rx RS-232 Receive Orange RS-485 - RS-485 signal - Yellow RS-485 + RS-485 signal + White/Brown Shield Earth Ground 597A-9800 Manual Rev A Page | 9...

  • Page 15: Terminal Mode And Sdi Commands

    - Display Record Header - Quit command mode and save any changes NOTE: The commands noted in this appendix will change both the RS232 and RS485 outputs. See the section below for SDI-12 commands. Page 10 597A-9800 Manual Rev A...
  • Page 16 Sensor Output every 1 second (Default) OI2<cr> Sensor Output every 2 seconds OI3<cr> Sensor Output every 5 seconds OI4<cr> Sensor Output every 15 seconds OI5<cr> Sensor Output every 30 seconds OI6<cr> Sensor Output every 60 seconds 597A-9800 Manual Rev A Page | 11...
  • Page 17 Read or Set the SDI12 Address COMMAND RESULT SA<cr> SA = 0 (Default = 0) SAn<cr> SDI12 address is set to ‘n’ where 'n' is in the range [0-9] [A-Z] or [a-z] Case Sensitive Page 12 597A-9800 Manual Rev A...
  • Page 18 Report the current firmware version number COMMAND RESULT RV<cr> Current firmware version QH – Display Record Header Report the format of the record output for the current engineering unit settings. COMMAND RESULT QH<cr> AT(C),RH(%),BP(mbar),ST (ST = 597A status) 597A-9800 Manual Rev A Page | 13...
  • Page 19 Send Data dddd.d = barometric pressure, and {crc} = CRC Report Temperature Units aXTU! aXTUd<CR><LF> Where a = address, and Set Temperature Units aXTUd! d = 0 for Celsius (default), or 1 for Fahrenheit Page 14 597A-9800 Manual Rev A...
  • Page 20 Where a = address, and Set Pressure Units aXPUf! f = 0 for Millibars (default), or 1 for Inches of Mercury Report Version Number aXRV! aXVNxx.x<CR><LF> Where a = address and xx.x = firmware version 597A-9800 Manual Rev A Page | 15...

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