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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
HOBO
U12 Temp/RH/Light/
®
External Data Logger
(Part # U12-012)
Thank you for purchasing a HOBO data logger. With proper care, it will give you years of accurate and reliable measurements.
The HOBO U12 Temperature/Relative Humidity/Light/External Data Logger is a four-channel logger with 12-bit resolution and can record up to
43,000 measurements or events. The external channel accepts 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.
Inside this package:
• HOBO U12 Temp/RH/
Light/External Data Logger
• Mounting kit with magnet, hook and loop tape, tie-wrap mount, tie wrap, and two screws.
Specifications
Temperature: -20° to 70°C (-4° to 158°F)
RH: 5% to 95% RH
Measurement range
Light intensity: 1 to 3000 footcandles (lumens/ft
External input channel (see sensor manual): 0 to 2.5 DC Volts
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.
Accuracy
Light intensity: Designed for indoor measurement of relative light levels, see Plot D for light wavelength response
External input channel (see sensor manual): ± 2 mV ± 2.5% of absolute reading
Temperature: 0.03°C at 25°C (0.05°F at 77°F), see Plot A
Resolution
RH: 0.03% RH
Temperature: 0.1°C/year (0.2°F/year)
Drift
RH: <1% per year typical; RH hysteresis 1%
Response time in airflow of
Temperature: 6 minutes, typical to 90%
1 m/s (2.2 mph)
RH: 1 minute, typical to 90%
Time accuracy
± 1 minute per month at 25°C (77°F), see Plot C
Logging: -20° to 70°C (-4° to 158°F)
Operating temperature
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).
© 200 Onset Computer Corporation
Part #: MAN-U12-012, Doc #: 7661-C
2
) typical; maximum value varies from 1500 to 4500 footcandles (lumens/ft
2
)
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Related Manuals for Hobo U12-012
Summary of Contents for Hobo U12-012
- Page 1 (Part # U12-012) Thank you for purchasing a HOBO data logger. With proper care, it will give you years of accurate and reliable measurements. The HOBO U12 Temperature/Relative Humidity/Light/External Data Logger is a four-channel logger with 12-bit resolution and can record up to 43,000 measurements or events.
- Page 2 HOBO U12 Temp/RH/Light/External 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). 1. Plug the large end of the USB interface cable into a USB port on the computer.
- Page 3 HOBO U12 Temp/RH/Light/External Data Logger Sample and event logging The logger can record two types of data: samples and events. Samples are the sensor measurements recorded at each logging interval (for example, the temperature every minute). Events are independent occurrences triggered by a logger activity. Examples of events recorded asynchronously during deployment include when the logger is connected to the host, when the battery is low, the end of a data file once the logger is stopped, and button pushes.
- Page 4 Dispose of the battery according to local regulations for lithium batteries. © 2008 Onset Computer Corporation. All rights reserved. Part #: MAN-U12-012, Doc #: 7661-C 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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