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HOBO
U12 4-External Channel
®
Outdoor/Industrial Data Logger
(Part # U12-008)
Inside this package:
•
HOBO U12 4-External Channel Outdoor/Industrial Data Logger
•
Desiccant pack
•
Mounting/spare parts kit: Allen wrench, dome plug and O-ring, four
mounting screws, and four flat washers
Thank you for purchasing a HOBO data logger. With proper care, it will give
you years of accurate and reliable measurements.
The HOBO U12 4-External Channel Outdoor/Industrial data logger has a 12-
bit resolution and can record up to 43,000 measurements or events. The four
external channels accept a variety of sensors, including temperature and split-
core AC current sensors as well as 4-20 mA and voltage input cables (sold
separately). The logger uses a direct USB interface for launching and data
readout by a computer.
An Onset software starter kit is required for logger operation. Visit www.onsetcomp.com for compatible software.
Specifications
Measurement range
Accuracy
(logger only)
Resolution
Time accuracy
Operating range
Operating temperature
Battery life
Memory
Weight
Dimensions
© 2009 Onset Computer Corporation
Part #: MAN-U12008, Doc #: 13132-A
External input channels (see sensor manual): 0 to 2.5 DC Volts
± 2 mV ± 2.5% of absolute reading
± 2 mV ± 1% of reading for logger-powered sensors
0.6mV
± 1 minute per month at 25°C (77°F), see Plot A
-20 to 70°C (-4° to 158°F)
Weatherproof case tested to NEMA 6 standard
Logging: -20° to 70°C (-4° to 158°F)
Launch/readout: 0° to 50°C (32° to 122°F), per USB specification
1 year typical use (see "Battery" details on last page)
64K bytes (43,000 12-bit measurements)
200 g (7 oz)
140 x 137 x 32 mm (5.5 x 5.38 x 1.25 inches)
The CE Marking identifies this product as complying with all relevant directives in
the European Union (EU).
Plot A
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Related Manuals for Hobo U12
Summary of Contents for Hobo U12
- Page 1 Mounting/spare parts kit: Allen wrench, dome plug and O-ring, four mounting screws, and four flat washers Thank you for purchasing a HOBO data logger. With proper care, it will give you years of accurate and reliable measurements. The HOBO U12 4-External Channel Outdoor/Industrial data logger has a 12- bit resolution and can record up to 43,000 measurements or events.
- Page 2 U12 4-External Channel Data Logger. Measurement specifications for using Onset temperature and AC current sensors with this logger are provided in the sensor manuals. For compatible sensors, refer to the HOBO catalog, contact Onset Computer Corporation, or contact an Onset Authorized Dealer.
- Page 3 HOBO U12 4-External Channel Outdoor/Industrial Data Logger Attaching the Sensors 1. Use the Allen wrench to remove the four socket head screws on the logger’s cover. Then remove the cover. 2. Using a 15 mm wrench, remove the dome nut for the channel you wish to connect to.
- Page 4 HOBO U12 4-External Channel Outdoor/Industrial Data Logger Connecting the Logger The U-Family logger requires an Onset-supplied USB interface cable to connect to the computer. If possible, avoid connecting at temperatures below 0°C (32°F) or above 50°C (122°F). Using a screwdriver, small coin, or similar object, turn the dome plug counter-clockwise and set it aside.
- Page 5 HOBO U12 4-External Channel Outdoor/Industrial Data Logger Closing the Logger Follow these steps to ensure a secure, weatherproof seal. Make sure the dome plug is in place. 2. Inspect the large O-ring around the face of the logger. It should be clean, lubricated, and fully seated into the groove. (O- ring lubricant is available from Onset Computer;...
- Page 6 HOBO U12 4-External Channel Outdoor/Industrial Data Logger Operation A light (LED) on the front of the logger confirms logger operation. The following table explains when the logger blinks during logger operation: When: The light: The logger is logging Blinks once every one to four seconds (the shorter the logging interval, the faster the light blinks);...
- Page 7 Do not expose the contents of the battery to water. Dispose of the battery according to local regulations for lithium batteries. 2009 Onset Computer Corporation. All rights reserved. © Onset and HOBO are registered trademarks of Onset Computer Corporation. Other products and brand names may be trademarks or registered trademarks of their respective owners.
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