HOBO U12 Temperature/Relative Humidity Data Logger - U12-011

Qty.	1-9	10-99	100+
$US	$115	$106	$98

Printable Data Sheet

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Overview
Required Items
Parts & Accessories

Overview

Description & Features

Detailed Specifications

Documentation

FAQs

Resources

The HOBO U12 Temperature/Relative Humidity Data Logger is a 2-channel data logger for high-accuracy monitoring of temperature and humidity.

Features:

12-bit resolution provides high accuracy
Large memory for long-term deployments or fast sampling
Five models to choose from, with flexible measurement options
Programmable and push button start

Environment:

The U12-011 Data Logger is for use in Indoor environments

Measurements:

The U12-011 Data Logger supports the following measurements : Relative Humidity, Temperature

Measurement range:
Temperature: -20° to 70°C (-4° to 158°F)
RH: 5% to 95% RH

Accuracy:
Temperature: ± 0.35°C from 0° to 50°C (± 0.63°F from 32° to 122°F), see Plot A
RH: ±2.5% from 10% to 90% RH (typical), to a maximum of ±3.5%, see Plot B.

Resolution:
Temperature: 0.03°C at 25°C (0.05°F at 77°F), see Plot A
RH: 0.03% RH

Sample Rate:
1 second to 18 hours, user selectable

Drift
Temperature: 0.1°C/year (0.2°F/year)
RH: <1% per year typical; RH hysteresis 1%

Response time in airflow of 1 m/s (2.2 mph)
Temperature: 6 minutes, typical to 90%
RH: 1 minute, typical to 90%

Time accuracy: ± 1 minute per month at 25°C (77°F), see Plot C

Operating temperature:
Logging: -20° to 70°C (-4° to 158°F)
Launch/readout: 0° to 50°C (32° to 122°F), per USB specification

Battery life: 1 year typical use

Memory: 64K bytes (43,000 12-bit measurements)

Weight: 46 g (1.6 oz)

Dimensions: 58 x 74 x 22 mm (2.3 x 2.9 x 0.9 inches)

The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

U12-011

U12-011 Manual (non CE)

PDF
U12-011

U12-011 Manual (CE)

PDF

What should I do if the data logger's internal board gets wet?

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If possible, remove the board from the case and the battery from the board. Dry the board completely using a hair dryer.

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I just bought a Data Logger. When I first plugged them into the USB port, a popup menu for Digital Signature concerning Microsoft asked if I wanted to continue: YES or NO. I said YES to all but one of them and now the computer won't recognize the logger.

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Open HOBOWare, plug the logger back in, then click on Start->Settings->Control Panel->System.

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Can the data be retrieved from a logger that is not communicating, or a logger that was accidentally re-launched prior to the data being downloaded?

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There are two common reasons for data loss: Relaunching a logger before the data has been saved Technical problem with the logger itself.

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I launched my data logger with "delayed start," but I noticed that logging began earlier than the time I entered. What happened?

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There is a small bug in early versions of the HOBO Water Temperature Pro data loggers that result in premature starting in some cases (when using the...

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How do i do a Quick Accuracy Check

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We receive many calls requesting information on how to calibrate our data loggers.

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The graph shows a random spike in the recorded data. What may have caused this?

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Spikes in the data file may be caused by rapid pressure changes or thermal shock (quick temperature changes). .

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I cannot communicate with my data logger.

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The Optic and Tidbit data loggers must be inserted into the Base Station in order for the computer to detect them; it will not detect the Base...

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My battery level seems to be going down quickly, what could be causing this?

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Check both the logging and the sampling interval to make sure they are greater than one-minute intervals.

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The datafile shows two more points than my testing did. Why?

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The first and last event on your datafile is a stamp of the start and end time.

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Can the data loggers be exposed to any type of chemical or chemical vapors?

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As a general rule, no.

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How often do the data loggers need recalibration and/or servicing?

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The CO data logger should be checked, at a minimum, on a yearly basis. Proper testing requires a CO testing chamber.

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What is the pin out for the 2.5 stereo input cable?

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Black (inner, end of 2.5mm jack near cable): is 0 volts White (outer, tip of 2.5mm jack): is the voltage input Red (middle): is the 2.

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What is the polarity of the 2.5 stereo input cable for voltage?

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Black = Ground White = Input Red = Switched .

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Why is my connection to the data loggers intermittent?

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For best performance, connect the USB cable directly to a port on your computer.

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What happens if my Keyspan USB server has a power interruption?

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If your Keyspan USB server has its power interrupted while you are running an alarm configuration, HOBOware will lose its connection to the data...

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Is the RH sensor user-replaceable?

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No. The U12 data loggers use a surface mount version of the sensor, which cannot be replaced by the customer. .

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How do I turn the data logger off?

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HOBO/StowAway data loggers shut off when the memory is full (unless wrap around is selected), or the data is downloaded to a computer.

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My data logger only recorded one data point, stops recording immediately after launch, or stopped recording prematurely.

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There are many situations that can cause a data logger to stop recording: 1.

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I cannot communicate with my HOBO Shuttle!

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Check to make sure that the batteries are still good. Follow the directions below for the model you have.

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What input does the external channel on the data logger accept?

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The external channels in the data logger accept the following Onset input cables: 0-2.5 volt DC or 4-20 mA, CT, temperature, and Telaire CO2 sensors.

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How do I turn the data logger off?

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All HOBO and StowAway data loggers shut off when the memory is full (unless wrap around is selected), or the data is downloaded to a computer.

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What data loggers are supported by Real-Time Alarm Software?

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All U10 and U12 data loggers are fully compatible with the Real-Time Alarm Software.

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The batteries in my data logger died while in use. Did I lose all of my data?

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No. The data is stored on non-volatile EEPROM. For data loggers with external batteries: change batteries and offload data, then relaunch normally.

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Do I need to rename the data file on the logging PC?

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You do not need to periodically rename or delete the data file on the logging PC because the file is automatically updated (e.g., test_1.txt, .

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What is the difference between ABS humidity, RH, Dew Point, and Uncompensated Humidity Measurement?

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BoxCar software gives you the ability to view humidity readings from different humidity data loggers as some or all of the following, dependent upon...

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Is there a shuttle available for the U12 data loggers?

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U-DT-1 .

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How does HOBOware behave when a data logger has a low battery?

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When device battery power is very low interaction with HOBOware can be intermittent. .

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Can the U12 data loggers be used with a serial port?

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No. The U12 data loggers have a direct USB interface, and there is no equivalent USB to serial converter available to convert USB to RS-232. .

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The data logger is shutting off prematurely.

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A discharge of static electricity may cause a running data logger to stop recording.

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What does the CE stamp on the data logger mean?

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The CE mark identifies the product as complying with relevant directives in the European Union (EU). .

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What are the advantages of the U12 data loggers over the H8 data loggers?

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Critereon U12 H8 Resolution 12-bit 8-bit Memory 43K 8K Accuracy ± 1 minute a month ± 1 minute a week Extras push button start (except...

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Can I use the indoor data loggers outdoors?

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No. These data loggers were manufactured for indoor use in non-condensing environments.

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I launched my U12 data logger; however, there is no data, only an event! Why?

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Most likely the channels were not enabled when the data logger was launched. .

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I just placed a new battery in my data logger and it still will not connect.

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The TL-5186 lithium batteries build up an internal passive resistance over a period of non-use.

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What data loggers are supported by Real-Time Alarm Software?

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All U10 and U12 data loggers are fully compatible with the Real-Time Alarm Software.

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What is a Data Logger?

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A data logger (or datalogger), commonly referred to as a 'HOBO', is an electronic instrument that records measurements (temperature, relative...

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How do I protect my data loggers from electrical discharge (ESD)?

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A discharge of static electricity may cause a running data logger to stop recording.

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The following are associated resources for this product. In general users of this product can gain insight into its possible use by utilizing the resources below.

White Papers: