Onset HOBO U14 User Manual
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Onset HOBO U14 User Manual

Lcd data logger
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Summary of Contents for Onset HOBO U14

  • Page 2 Onset Computer Corporation Onset, HOBO, and HOBOware are trademarks or registered trademarks of Onset Computer Corporation for its data logger products and configuration/interface software. All other trademarks are the property of their respective companies. Mailing Address: P.O. Box 3450 Pocasset, MA 02559-3450...

  • Page 3: Table Of Contents

    Onset Computer Corporation Contents     Chapter One: Overview of the HOBO U14 ..................2   Introduction ............................2   Features ..............................3   Components ............................4   The LCD Screen ............................ 5     Chapter Two: Setting-Up the HOBO U14 .................... 7  ...

  • Page 4: Chapter One: Overview Of The Hobo U14

    USB connectivity for fast data readout to your computer. The HOBO U14 logger records and displays temperature and humidity conditions in manufacturing, processing, and storage environments where reliable monitoring and documentation of specific temp/RH conditions are critical.

  • Page 5: Features

    Onset Computer Corporation Features The HOBO U14 has the following key features: • 64k non-volatile memory that retains data even if the batteries fail. • Memory indicator on LCD shows how much data storage space remains. • Battery Level indicator shows remaining useful battery life.

  • Page 6: Components

    Battery Compartment The HOBO U14 requires three AAA batteries. Onset Computer Corporation strongly recommends the use of fresh alkaline batteries. Batteries should be replaced when the BATT LEVEL bar graph is down to one segment, which indicates 20% battery life or less.

  • Page 7: The Lcd Screen

    See Replacing the Internal RH Sensor on page 11. Relay Terminal The HOBO U14 is compatible with Onset’s Remote Alarm (part number ARA) and Automatic Dialer (part number AVD-45) available from Onset Computer or an Onset Authorized Dealer. See page 17.
  • Page 8 Onset Computer Corporation Displayed Values There may be slight variations between the displayed temperature value and the logged value due to limits in display conversions. The values seen in HOBOware and the U-Shuttle are the actual recorded values and the most accurate. The displayed temperature on the LCD screen may be ±0.3°C (±0.6°F) different than the logged value.

  • Page 9: Chapter Two: Setting-Up The Hobo U14

    3. Replace the battery cover. 4. If you have an External Sensor model (002), plug the external sensor into the RJ-12 jack on the side of the HOBO U14. Hold the black rubber flap down against the connector so it slides into the port.

  • Page 10: Configuring Alarms

    Onset Computer Corporation Configuring Alarms Use the Alarm feature to flash a warning on the LCD if monitored temperature or relative humidity falls outside user-selectable limits. If the temperature or RH measured by the logger falls outside the selected high or low limit, the word ‘Alert,’ an alert symbol, and the temperature or RH measurement that went out of limits will flash.
  • Page 11 NOTE: When testing the alarm with the AVD-45 Automatic Dialer, Onset recommends that you maintain the alarm for up to 7 minutes to ensure that the AVD-45 Automatic Dialer completes its dial-out sequence (see AVD-45 Automatic Dialer User’s Manual for details).

  • Page 12: Reading Out The Hobo U14

    4. Run HOBOware software on the computer. 5. Optional - If you have more than one logger connected to the computer, connect to the HOBO U14 by selecting Device > Select and then select the HOBO U14 from the Select Device window.

  • Page 13: Chapter Three: Maintenance

    Replacing Batteries The HOBO U14 requires three AAA batteries. Onset Computer Corporation strongly recommends the use of fresh alkaline batteries. Batteries should be replaced when the BATT LEVEL bar graph is down to one segment, which indicates 20% battery life or less.

  • Page 14: Chapter Four: Reference

    Onset Computer Corporation Chapter Four: Reference HOBO U14 Specifications Environmental • Operating temperature range -20°C to +50°C, (-4°F to +122°F) , 0 to 100% RH non-condensing • Operating relative humidity range 0 to 95%, non-condensing, non-corrosive environment Logger Capabilities •...
  • Page 15 Onset Computer Corporation Power • 3 AAA Alkaline batteries, user-replaceable Dimensions • 125 x 92 x 31 mm (4.9 x 3.6 x 1.2 in) Weight • 170 g (6.0 oz) with batteries Internal 12-Bit Temperature Sensor • Measurement range: -20°C to +50°C (-4°F to +122°F) •...

  • Page 16: Temperature Accuracy And Resolution

    The maximum reading error for the internal temperature sensors is shown below. This is a worst case error. In a typical logger, temperature errors will be substantially lower. NIST certification of temperature accuracy for some sensors is available from Onset.

  • Page 17: Lcd Indicators

    The MEM LEFT bar graph will decrease as the memory is filled. When the memory has been completely filled, the MEM LEFT display will flash and all segments will be off. The HOBO U14 will continue to monitor conditions however, and will trigger an alert if the reading falls outside of the configured range.
  • Page 18 Onset Computer Corporation Memory Display States State MEM LEFT Hash marks Segments Illustration Stopped None Launched/Logging Number of segments depends on memory remaining. Highest segment flashes. Launch Delaying Flashing All On/Flashing Memory Full Flashing (until data is downloaded) All Off...

  • Page 19: Chapter Five: Remote Alarm Or Automatic Dialer

    Remote Alarm or Automatic Dialer The HOBO U14 is compatible with Onset’s Remote Alarm (part number ARA) and Automatic Dialer (part number AVD-45) available from Onset Computer or an Onset Authorized Dealer. See the product’s user manual for complete details.

  • Page 20: Wiring Diagrams

    NOTE: All drawings show the logger in the Normally Closed state with the Alert inactive. The HOBO U14’s contact closure is initially set at the factory to be Normally Closed, but you can change this in HOBOware to accommodate Normally Open devices (see the ARA User’s Manual).
  • Page 21 Onset Computer Corporation HOBO U14 with Onset’s ARA Remote Alarm and AVD-45 Automatic Dialer NOTE: The polarity must be as shown. HOBO U14 User’s Guide...
  • Page 22 Onset Computer Corporation Onset Computer Corp. P.O. Box 3450 Pocasset, MA 02559-3450 HOBO U14 User’s Guide...

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