Hobo U12 User manual

HOBO®U12 Stainless Temp
Data Logger
(Part # U12-015, U12-015-02)
© 2003 - 2005 Onset Computer Corporation
Part #: MAN-U12-015 Doc #: 7938-E
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
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
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).
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
-40-200 20406080100120
Temperature (°C)
Accuracy/Resolution(°C)
Accuracy
Resolution
Plot A
-400
-300
-200
-100
0
100
200
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
Time Base Error (PPM)
-17.3
-13.0
-8.6
-4.3
0.0
4.3
8.6
Time Base Error (Min/Month)
Plot B
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
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.
Supplied in Australia by Instrument Choice
Call our scientists on 1300 737 871
www.instrumentchoice.com.au

HOBO U12 Stainless Temp Data Logger
2
Mounting
A 4.8 mm (3/16") diameter hole is provided in the end-cap to
secure the logger to an object.
Care and maintenance of the logger
The logger can be permanently damaged by internal corrosion
from condensation or foreign matter entering the case. The
logger is shipped with an installed EPDM O-ring. (Refer to the
chart in the included O-ring Replacement Kit for information
about specific O-ring applications.) The logger electronics
depend upon the integrity of the O-ring seal for protection. Prior
to every deployment, the O-ring should be inspected for cracks
or tears, and for proper lubrication. The O-ring’s surface should
be smooth and lightly lubricated. If needed, the O-ring should be
re-lubricated or replaced. In addition, the end-cap must be
securely in place with no visible gap between the housing and
the end-cap. Before opening the end-cap for read out, make sure
that the logger is clean and dry. The logger should always be
capped when it is not connected to the computer.
316L stainless steel has good corrosion resistance, but it can be
damaged by contact with dissimilar metals or through crevice
corrosion. The logger should not be deployed in salt or brackish
water, or the housing will eventually fail and water will destroy
the electronics. If long-term deployment in salt water is required,
place the logger in a sealed bladder containing a non-corrosive
liquid. Always rinse the logger with fresh water after
deployment in salt or brackish water.
On the U12-015-02, the 5" piercing probe can be bent and/or
broken with excessive force. Damage to the 5" probe is
expressly not covered by the product warranty, and cannot be
repaired.
Note! Static electricity may cause the logger to stop logging.
To avoid electrostatic discharge, transport the logger only with
its end-cap on, or in an anti-static bag. Ground yourself by
touching an unpainted metal surface before handling the logger.
For more information about electrostatic discharge, visit our
website at http://www.onsetcomp.com/support/support.html.
Battery
Expected battery life varies based on the temperature and the
frequency at which the logger is recording data (the logging
interval). With 60 minutes of operation at 125°C (257°F) per
day, a new battery will typically last approximately three years
with logging intervals greater than one minute. Deployments in
extremely cold or hot temperatures or logging intervals faster
than one minute may significantly reduce battery life.
The logger has the ability to report and log its own battery
voltage. If the battery falls below 3.1 V, the logger will record a
“bad battery” event in the datafile. If the datafile contains “bad
battery” events, or if logged battery voltage repeatedly falls
below 3.3 V, the battery is failing and the logger should be
returned to Onset for battery replacement.
Do not attempt to replace the battery. If the battery needs to be
replaced, contact Onset or an Onset Authorized Dealer for
factory replacement battery service.
WARNING: Do not cut open, incinerate, heat above
150°C (302°F), or recharge the lithium battery. The battery
may explode if the logger is exposed to extreme heat or
conditions that could damage or destroy the battery case. Do
not dispose of the logger or battery in fire. Do not expose the
contents of the battery to water. Dispose of the battery
according to local regulations for lithium batteries.
Service and Support
HOBO products are easy to use and reliable. In the unlikely event that you have
a problem with this instrument, contact the company where you bought the
logger: Onset or an Onset Authorized Dealer. Before calling, you can evaluate
and often solve the problem if you write down the events that led to the problem
(are you doing anything differently?) and if you visit the Technical Support
section of the Onset web site at www.onsetcomp.com/support.html. When
contacting Onset, ask for technical support and be prepared to provide the
product number and serial number for the logger and software version in
question. Also completely describe the problem or question. The more
information you provide, the faster and more accurately we will be able to
respond.
Onset Computer Corporation
470 MacArthur Blvd., Bourne, MA 02532
Mailing: PO Box 3450, Pocasset, MA 02559-3450
Phone: 1-800-LOGGERS (1-800-564-4377) or 508-759-9500
Fax: [phone]
E-mail: [email protected]
Internet: www.onsetcomp.com
Warranty
Onset Computer Corporation (Onset) warrants to the original end-user purchaser
for a period of one year from the date of original purchase that the HOBO®
product(s) purchased will be free from defect in material and workmanship.
During the warranty period Onset will, at its option, either repair or replace
products that prove to be defective in material or workmanship. This warranty
shall terminate and be of no further effect at the time the product is (1) damaged
by extraneous cause such as fire, water, lightning, etc. or not maintained in
accordance with the accompanying documentation; (2) modified; (3) improperly
installed; (4) repaired by someone other than Onset; or (5) used in a manner or
purpose for which the product was not intended.
THERE ARE NO WARRANTIES BEYOND THE EXPRESSED
WARRANTY ABOVE. IN NO EVENT SHALL ONSET BE LIABLE FOR
LOSS OF PROFITS OR INDIRECT, CONSEQUENTIAL, INCIDENTAL,
SPECIAL OR OTHER SIMILAR DAMAGES ARISING OUT OF ANY
BREACH OF THIS CONTRACT OR OBLIGATIONS UNDER THIS
CONTRACT, INCLUDING BREACH OF WARRANTY, NEGLIGENCE,
STRICT LIABILITY, OR ANY OTHER LEGAL THEORY.
Limitation of Liability. The Purchaser's sole remedy and the limit of Onset's
liability for any loss whatsoever shall not exceed the Purchaser's price of the
product(s). The determination of suitability of products to the specific needs of
the Purchaser is solely the Purchaser's responsibility. THERE ARE NO
WARRANTIES BEYOND THE EXPRESSED WARRANTY OFFERED
WITH THIS PRODUCT. EXCEPT AS SPECIFICALLY PROVIDED IN
THIS DOCUMENT, THERE ARE NO OTHER WARRANTIES EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
WARRANTIES OF MERCHANTIBILITY OR FITNESS FOR A
PARTICULAR PURPOSE. NO INFORMATION OR ADVICE GIVEN BY
ONSET, ITS AGENTS OR EMPLOYEES SHALL CREATE A
WARRANTY OR IN ANY WAY INCREASE THE SCOPE OF THE
EXPRESSED WARRANTY OFFERED WITH THIS PRODUCT.
Indemnification. Products supplied by Onset are not designed, intended, or
authorized for use as components intended for surgical implant or ingestion into
the body or other applications involving life-support, or for any application in
which the failure of the Onset-supplied product could create or contribute to a
situation where personal injury or death may occur. Products supplied by Onset
are not designed, intended, or authorized for use in or with any nuclear
installation or activity. Products supplied by Onset are not designed, intended, or
authorized for use in any aeronautical or related application. Should any Onset-
supplied product or equipment be used in any application involving surgical
implant or ingestion, life-support, or where failure of the product could lead to
personal injury or death, or should any Onset-supplied product or equipment be
used in or with any nuclear installation or activity, or in or with any aeronautical
or related application or activity, Purchaser will indemnify Onset and hold Onset
harmless from any liability or damage whatsoever arising out of the use of the
product and/or equipment in such manner.
Returns
Please direct all warranty claims and repair requests to place of purchase.
Before returning a failed unit directly to Onset, you must obtain a Return
Merchandise Authorization (RMA) number from Onset. You must provide proof
that you purchased the Onset product(s) directly from Onset (purchase order
number or Onset invoice number). Onset will issue an RMA number that is valid
for 30 days. You must ship the product(s), properly packaged against further
damage, to Onset (at your expense) with the RMA number marked clearly on the
outside of the package. Onset is not responsible for any package that is returned
without a valid RMA number or for the loss of the package by any shipping
company. Loggers must be clean before they are sent back to Onset or they may
be returned to you.
Repair Policy
Products that are returned after the warranty period or are damaged by the
customer as specified in the warranty provisions can be returned to Onset with a
valid RMA number for evaluation.
ASAP Repair Policy. For an additional charge, Onset will expedite the repair of
a returned product.
Data-back™ Service. HOBO data loggers store data in nonvolatile EEPROM
memory. Onset will, if possible, recover your data to a disk.
Tune Up Service. Onset will examine and retest any HOBO data logger.
© 2003 - 2005 Onset Computer Corporation. All rights reserved.
Part #: MAN-U12-015 Doc #: 7938-E
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.