1. Manuals
  2. Brands
  3. Seametrics Manuals
  4. Data Loggers
  5. GDL
  6. Instructions manual

Seametrics GDL Instructions Manual

4-20 ma
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
GDL 4-20 mA
Datalogger
Instructions
PROUDLY
ISO
MADE
IN THE
USA
9001:2008

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the GDL and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Seametrics GDL

Summary of Contents for Seametrics GDL

  • Page 1 GDL 4-20 mA Datalogger Instructions PROUDLY MADE IN THE 9001:2008...

  • Page 2: Table Of Contents

    Connecting via RS232 Serial Port ....................16 Connecting with a USB/Serial Adapter..................16 Limited Warranty/Disclaimer - GDL Data Logger.......... 18 ©1997 - 2016 Seametrics, Inc. All rights reserved. Registered trademarks and trademarks belong to their respective owners. Seametrics • 253.872.0284 Page 2 seametrics.com...

  • Page 3: General Information

    This particular unit is a GDL with two 4-20 mA channels. Output can be displayed in mA, microAmps, or user-defined units. The GDL is powered with eight AA batteries The unit is programmed using a laptop...

  • Page 4: Getting Started

    Adapter PC or Laptop USB Port Connect the sensor to your PC using Seametrics’ USB to RS485 adapter. (See Appendix C for alternate connections.) Aqua4Plus Software The GDL comes with the Aqua4Plus host software that is installed on your PC or laptop.

  • Page 5: Warm Up Time

    4-20 mA channels – mA, uA, and User Defined. Select User Defined. Select User Defined Units 4. You can only set field calibration when there are no sessions on the GDL. Be sure to upload any data on the sensor and erase all sessions, before continuing.
  • Page 6 GDL 4 - mA INSTRUCTIONS GETTING STARTED 7. Define your own user units in the Field Calibration window as follows. • User Units: Enter a name for your units in the User Units box. For example, you might enter psi.

  • Page 7: Maintenance

    The GDL runs on eight AA alkaline batteries. To replace the batteries, remove the four corner screws and lift off the lid. Gently lift out the battery pack.

  • Page 8: Reading The Gdl

    ® equipment or networks. You may need to use Aqua4Plus to make a few settings, prior to directly reading the GDL with your equipment. These settings may include units for returned values, baud rate, and SDI-12 command structure. These are described in the following sections.

  • Page 9: Reading Via Modbus ® Rtu

    There is a “power on” register on the GDL (register 62720 or 0xF500). When a positive value “n” is written to this register, the power is turned on to the sensing probe and remains on for n/4 seconds.

  • Page 10: Reading Via Sdi-12

    On but simply takes readings on a specified schedule, be sure to set the polling interval to less than 7.5 seconds. This will ensure that the GDL is always providing power to the connected sensors and readings should be fresh and stable. Note that the first reading when you turn on the sensor and meter will be old but will refresh within a second or two.
  • Page 11 GDL 4 - MA INSTRUCTIONS READING THE GDL Use the SDI-12 Setup window to define what values are returned for specific SDI-12 commands. This window consists of four tabs, one for the M and C commands, one for the M1 and C1 commands, one for the M2 and C2 commands, and one for the M3 and C3 commands.
  • Page 12 GDL 4 - mA INSTRUCTIONS READING THE GDL SDI-12 Command Nomenclature <a> = Sensor address {crc} = SDI-12 compatible 3-character CRC <cr> = ASCII carriage return character <lf> = ASCII line feed character highlighted values indicate variable data SDI-12 Commands //*** Sensor Identification <a>I! <a>13 INWUSA GDL2.9ssssssssss<cr><lf>...

  • Page 13: Appendix A: Specifications

    5.5” x 3.1” x 2.6” (14 x 7.9 x 6.6 cm) — excluding connectors Connections 1 communication port 2 sensor ports Communication Connector The GDL comes with one five-pin communication connector. Use this for communicating with your computer. Description Internal wiring...

  • Page 14: Connecting Via Rs232 Serial Port

    USB-to-Serial cables are readily available from many electronics and computer stores, as well as numerous sites on the Internet. Seametrics has tested and recommends the Keyspan USA-19HS. It is available from Seametrics as well as from many sites on the Internet. Install as follows: 1.
  • Page 15 GDL 4 - MA INSTRUCTIONS 4. Connect to the sensor. 5. On the Aqua4Plus software, select the COM port noted above. (If you do not see your new COM port in the dropdown box, open the Communications dialog box from the Options menu. Increase the Highest COM port number, up to a maximum of 15.)

  • Page 16: Limited Warranty/Disclaimer - Gdl Datalogger

    This limited warranty gives you specific legal rights; however, you may also have other rights which may vary from state to state. Seametrics • 19026 72nd Avenue South • Kent, Washington 98032 • USA (P) 253.872.0284 • (F) 253.872.0285 • 1.800.975.8153 • seametrics.com...

Table of Contents