HOBO® Pendant® Event Data Logger (UA-003-64) Manual
HOBO Pendant Event
Data Logger
Model: UA-003-64
Included Items:
• Tie wraps
• Adhesive mount
Required Items:
• HOBOware 2.x or later (go to
www.onsetcomp.com/
hoboware-free-download)
• USB cable
• Optic USB Base Station
(BASE-U-4) or HOBO
Waterproof Shuttle
(U-DTW-1) & Coupler
(COUPLER2-A)
9831-K
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.
Specifications
External Event Input
Event Sensor
Two-wire interface suitable for measuring mechanical and electrical
contact closures
Maximum Input
1 Hz (1 pulse per second)
Frequency
Lockout Time
500 ms
Minimum Pulse Width
1 ms (hardware debounce)
Input/Output Impedance
100 kΩ
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
Battery voltage; nominally 3.0 V
Voltage
Maximum Input Voltage
Battery voltage + 0.3 V
User Connection
24 AWG, 2 leads: white (+), black (-)
Temperature Measurement
-20° to 70°C (-4° to 158°F)
Measurement Range
±0.53°C from 0° to 50°C (±0.95°F from 32° to 122°F), see Plot A. A solar
Accuracy
radiation shield is required for accurate temperature measurements in
sunlight.
0.14°C at 25°C (0.25°F at 77°F), see Plot A
Resolution
Less than 0.1°C/year (0.2°F/year)
Drift
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; not
suitable for deployment in direct sunlight.
Drop Specification
1.5 m (5 ft) onto concrete
NIST Traceable
Available for temperature only at additional charge; temperature range
Certification
-20° to 70°C (-4° to 158°F)
Battery
CR-2032 3V lithium battery; 1 year typical use; deployments in
extremely cold or hot temperatures or logging intervals faster than one
minute may significantly reduce battery life.
Memory
64K bytes; see Data Storage.
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 all relevant
directives in the European Union (EU).
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