Hobo U12 Quick Start Manual

HOBO U12 Stainless Temp
®
Data Logger
(Part # U12-015, U12-015-02)
Inside this package:
• HOBO U12 Stainless Temp
Data Logger (U12-015)
or
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
Specifications
Measurement range -40° to 125°C (-40° to 257°F)
± 0.22°C at 25°C (± 0.4°F at 77°F), see Plot
Accuracy
A
0.025°C at 25°C (0.045°F at 77°F), see Plot
Resolution
A
0.05°C/year + 0.1°C/1000 hrs above 100°C
Drift
(0.09°F/year + 0.2°F/1000 hrs above 212°F)
U12-015: < 10 minutes, typical to 90%
Response time in 1
m/s (2.2 mph) airflow
U12-015-02: 2.25 minutes, typical to 90%
U12-015: < 3.5 minutes, typical to 90%
Response time in
water
U12-015-02: 20 seconds, typical to 90%
± 2 minute per month at 25°C (77°F), see
Time accuracy
Plot B
Operating
Air, water, steam, 0 to 100% RH
environment
Logging: -40° to 125°C (-40° to 257°F)
Operating
Launch/readout: 0° to 50°C (32° to 122°F),
temperature
per USB specification
Battery life 3 year typical use, factory replaceable
Memory 64K bytes (43,000 12-bit measurements)
316L stainless steel with O-ring seal (food
Construction
grade)
U12-015: 72 g (2.5 oz)
Weight
U12-015-02: 82 g (2.9 oz)
Logger dimensions 17.5 x 101.6 mm (0.69 x 4.00 inches)
Probe dimensions
4 x 124 mm (0.16 x 4.90 inches)
(U12-015-02 only)
Pressure/depth rating 2200 psi (1500 m/4900 ft) maximum
Navy spec: NAVMAT P-9492
Vibration rating
(non-probe model only)
Available for additional charge; temperature
NIST certificate
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).
1.8
Accuracy
1.6
Resolution
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-40 -20 0 20 40 60 80 100
T em perature (°C)
Plot A
Supplied in Australia by Instrument Choice
Call our scientists on 1300 737 871
www.instrumentchoice.com.au
© 2003 - 2005 Onset Computer Corporation
Part #: MAN-U12-015 Doc #:
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.
200
100
0
-100
-200
-300
-400
120
-40 -20 0 20 40 60 80
Temperature (°C)
Plot B
7938-E
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).
1. 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.
2. Plug the large end of the USB interface cable into a USB port
on the computer.
3. 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
8.6
temperatures below 0°C (32°F) or above 50°C (122°F).
4.3
0.0
Sample and event logging
-4.3
The logger can record two types of data: samples and events.
-8.6
Samples are the sensor measurements recorded at each logging
-13.0
interval (for example, the temperature every minute). Events are
-17.3
100 120
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.