temperature data-logger U12-015 - ONSET - (Version JPG) - PDF Catalogue | Technical Documentation

HOBO® U12 Stainless Temp Data Logger

(Part # U12-015, U12-015-02)

Inside this package:

• HOBO U12 Stainless Temp Data Logger (U12-015)

HOBO U12 Stainless Temp

Data Logger with 5" Probe (U12-015-02)

• O-Ring Replacement Kit (Onset part # U12-015-Oring-

kit)

Doc # 7938-E, MAN-U12-015 Onset Computer Corporation

Thank you for purchasing a HOBO data logger. With proper care, it will give you years of accurate and reliable measurements.

The HOBO U12 Stainless Temp Data Logger is a single-channel temperature logger with 12-bit resolution that can record up to 43,000 measurements. 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

Connecting the logger

The U-Family logger requires a 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).


	Measurement range	-40° to 125°C (-40° to 257°F)
	Accuracy	± 0.22°C at 25°C (± 0.4°F at 77°F), see Plot A
	Resolution	0.025°C at 25°C (0.045°F at 77°F), see Plot A
	Drift	0.05°C/year + 0.1°C/1000 hrs above 100°C (0.09°F/year + 0.2°F/1000 hrs above 212°F)
	Response time in 1 m/s (2.2 mph) airflow	U12-015: < 10 minutes, typical to 90% U12-015-02: 2.25 minutes, typical to 90%
	Response time in water	U12-015: < 3.5 minutes, typical to 90% U12-015-02: 20 seconds, typical to 90%
	Time accuracy	± 2 minute per month at 25°C (77°F), see Plot B
	Operating environment	Air, water, steam, 0 to 100% RH
	Operating temperature	Logging: -40° to 125°C (-40° to 257°F) Launch/readout: 0° to 50°C (32° to 122°F), per USB specification
	Battery life	3 year typical use, factory replaceable
	Memory	64K bytes (43,000 12-bit measurements)
	Construction	316L stainless steel with O-ring seal (food grade)
	Weight	U12-015: 72 g (2.5 oz) U12-015-02: 82 g (2.9 oz)
	Logger dimensions	17.5 x 101.6 mm (0.69 x 4.00 inches)
	Probe dimensions (U12-015-02 only)	4 x 124 mm (0.16 x 4.90 inches)
	Pressure/depth rating	2200 psi (1500 m/4900 ft) maximum
	Vibration rating	Navy spec: NAVMAT P-9492 (non-probe model only)
	NIST certificate	Available for additional charge; temperature range -30° to 120°C (-22° to 248°F)
	©	The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

Remove the stainless steel end-cap from the logger by turning it counter-clockwise. If the cap is difficult to turn, place the stem of a small screwdriver through the hole in the end-cap for better leverage.

Plug the large end of the USB interface cable into a USB port on the computer.

Plug the small end of the USB interface cable into the logger as shown in the following diagram.

4. If the logger has never been connected to the computer before, it may take a few seconds for the new hardware to be detected.

5. Use the logger software to launch the logger. (The first time you launch the logger, the deployment number will be greater than zero. Onset launches the loggers to test them prior to shipping.)

6. You can read out the logger while it continues to log, stop it manually with the software, or let it record data until the memory is full. Refer to the software user's guide for complete details on launching, reading out, and viewing data from the logger.

Important: USB communications may not function properly at temperatures below 0°C (32°F) or above 50°C (122°F).

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, and the end of a data file once the logger is stopped.

The logger stores 64K of data, and can record up to 43,000 samples.



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	pi
1

Temperature (°C)

Plot A

Plot B

temperature data-logger U12-015 - ONSET - #1

Current sensor, Wireless data-logger, Pressure sensor, Instrument transformer, Temperature transmitter