Onset HOBO U14 User Manual

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

Phone: 1-800-LOGGERS (1-800-564-4377) or 508-759-9500
Fax: [phone]
Hours of Operation: 8 AM to 5 PM ET, Monday through Friday

E-mail: [e-mail]
Main Onset Web site: www.onsetcomp.com

If you purchased the products through an Onset Authorized Dealer, you can also refer to www.hobohelp.com for support information.

© 2009 Onset Computer Corporation. All rights reserved.

Part #: MAN-U14
Doc #: 12033-C

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Contents

Chapter One: Overview of the HOBO U14 ......................................................................................... 2

Introduction ............................................................................................................................................ 2

Features ................................................................................................................................................ 3

Components .......................................................................................................................................... 4

The LCD Screen .................................................................................................................................... 5

Chapter Two: Setting-U p t h e HOBO U14 ............................................................................................ 7

Procedure .............................................................................................................................................. 7

Configuring Alarms ................................................................................................................................ 8

Reading Out the HOBO U14 ............................................................................................................... 10

Chapter Three: Maintenance .................................................................................................................. 11

Replacing the Internal RH Sensor ....................................................................................................... 11

Replacing Batteries ............................................................................................................................. 11

Chapter Four: Reference ...................................................................................................................... 12

HOBO U14 Specifications ................................................................................................................... 12

Temperature Accuracy and Resolution ............................................................................................... 14

Internal Relative Humidity Accuracy ................................................................................................... 14

LCD Indicators ..................................................................................................................................... 15

Chapter Five: Remote Alarm or Automatic Dialer ............................................................................. 17

Wiring Diagrams .................................................................................................................................. 18

HOBO U14 1 User’s Guide

Onset Computer Corporation

Chapter One: Overview of the HOBO U14

Introduction

The U family of data loggers offers reliability and convenient monitoring for applications that require higher accuracy, better resolution,
more memory, or 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.

The HOBO U14 is available in two versions:

• 001 - Internal Sensors

• 002 - External Sensors

Requirements

The HOBO U14 requires:

• HOBOware Pro or HOBOware Lite, Version 2.5 or later

Location Requirements

The HOBO U14 is designed for a non-condensing, non-corrosive environment. Keep the logger dry.

Some external sensors can be placed in harsher environments than the logger. See the external sensor specifications in the sensor user
manual.

HOBO U14 2 User’s Guide

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.

• Operates for one year on three alkaline AAA batteries in typical conditions.

• Built-in relay for use with Remote Alarm or Automatic Dialer.

• Direct USB interface for launching and data readout using HOBOware.

• Sample (logging) interval can be set from one second to 18 hours

• Supports Onset’s Data Assistants (available with HOBOware software)

• Can be used with the Onset U-Shuttle (U-DT-1)

• Internal Sensors (Model 001)

The Internal Sensor model has two internal sensors with 12-bit resolution:

- Temperature

- Relative Humidity

• External Sensors (Model 002)

The External Sensor model supports the following external sensors:

- 12-bit Temperature/10-bit RH Sensor (S-THB-M00x)

- 12-bit Temperature Sensor (S-TMB-M00x)

• Accessories

- Outdoor Case (CASE-4x)

- Remote Alarm (ARA)

- Automatic Dialer (AVD-45)

HOBO U14 3 User’s Guide

Components

Front

LCD Screen

See LCD Indicators on page 15.

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USB Port

Use an Onset-supplied USB interface cable to connect the HOBO U14 to a computer.

External Sensor Port (Model 002 Only)

Connect supported Smart Sensor here.

Back

Mounting Holes

Use mounting screws 2.5 cm (1 inch) apart to mount the U14 to a wall.

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.

HOBO U14 4 User’s Guide

Onset Computer Corporation

Circuit Board

Replaceable Internal RH Sensor (Model 001 Only)

The internal relative humidity sensor in the U14-001 may require replacement if it is damaged mechanically or by exposure to
condensation or chemicals. The replacement sensor (Onset part number HUM-RHPCB-3) is available from Onset or an Onset
Authorized Dealer.

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.

The LCD Screen

After installing the batteries, the LCD will display all segments for five seconds. Thereafter, the LCD will display temperature and %
RH information. The values on the LCD screen refresh every 30 seconds.

Also See: LCD Indicators on page 15.

HOBO U14 5 User’s Guide