HOBO
®
Pendant
Event/Temp Data Logger
(Part # UA-003-64)
© 2005, 2006 Onset Computer Corporation
Part #: MAN-UA-003, Doc #: 9831-C
Inside this package:
• HOBO Pendant
Event/Temp
Data Logger
• Tie wraps and
adhesive mount
Doc # 9831-C, MAN-UA-003
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 Pendant Event/Temp Data Logger is a rugged,
weatherproof event logger with a 10
-
bit temperature sensor. It is ideal
for use with tipping-bucket rain gauges, and can record tens of
thousands of measurements and events. The logger uses a coupler and
optical base station with USB interface for launching and data readout
by a computer.
A base station, coupler, and HOBOware
®
software are required for
logger operation. Visit www.onsetcomp.com for compatibility
information.
Specifications
External event input
Event sensor
Two-wire interface suitable for measuring mechanical and electrical contact closures
Maximum input frequency
1 Hz (1 pulse per second)
Lockout time
500 ms
Minimum pulse width
1 ms (hardware debounce)
Input/output impedance
100 k
Ω
Edge detection
Falling edge, contact closure, or Schmitt-trigger buffer
Preferred switch type
Normally open. For maximum battery life, the event input should be used with its preferred switch type. The
logger will work with normally closed switches, but battery life will be compromised.
Open circuit input voltage
Battery voltage; nominally 3.0 V
Maximum input voltage
Battery v 0.3 V
User connection
24 AWG, 2 leads: white (+), black (
-
)
Temperature measurement
Measurement range
-
20° to 70°C (
-
4° to 158°F)
Accuracy
± 0.47°C at 25°C (± 0.85°F at 77°F), see Plot A. A solar radiation shield is required for accurate temperature
measurements in sunlight.
Resolution
0.10°C at 25°C (0.18°F at 77°F), see Plot A
Drift
Less than 0.1°C/year (0.2°F/year)
Response time
Airflow of 2 m/s (4.4 mph): 10 minutes, typical to 90%
Logger
Time accuracy
± 1 minute per month at 25°C (77°F), see Plot B
Operating range
-
20° to 70°C (
-
4° to 158°F)
Environmental rating
Tested to NEMA 6 and IP67; suitable for deployment outdoors
Drop specification
1.5 m (5 ft) onto concrete
NIST traceable certification
Available for temperature only at additional charge; temperature range
-
20° to 70°C (
-
4° to 158°F)
Battery CR
-
2032 3V lithium battery; 1 year typical use
Memory
64K bytes; see “Data storage” on page 3.
Materials
Polypropylene case; stainless steel screws; Buna
-
N o
-
ring; PVC cable insulation
Weight
50 g (1.7 oz.)
Dimensions
71 x 33 x 23 mm (2.8 x 1.3 x 0.9 inches); 1.8 m (6 ft) cable
The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).
