Switch - Data Switch User Manual
HOBO
®
Pendant G
Acceleration Data Logger
(Part # UA-004-64)
© 2006 Onset Computer Corporation
Part #: MAN-UA-004, Doc #: 10872-A
Inside this package:
• HOBO Pendant G Acceleration Data
Logger
• Mounting bracket and screw
Doc # 10872-A, MAN-UA-004
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 G Acceleration Data Logger is a waterproof,
three-channel logger with 8-bit resolution and can record up to
approximately 21,800 combined x-, y-, and z-axis acceleration readings or
internal logger events. The logger uses a coupler and optical base station
with USB interface for launching and data readout by a computer.
The logger can be used for a wide variety of experiments, demonstrations
and field studies by measuring dynamic acceleration resulting from motion,
shock or vibration. It can also detect static acceleration of gravity, making
it possible to measure tilt, activity, and inclination.
The logger uses an internal three-axis accelerometer with a range of
± 3 g
based on micro-machined silicon sensors consisting of beams that deflect
with acceleration. These beams are arranged to act as a variable capacitor.
As the beams move, the capacitance changes proportionately. This
capacitance change is converted to voltage, filtered and measured by the
logger, and displayed in the software in units of g-force.
A base station, coupler, and HOBOware
®
software are required for logger
operation. Visit www.onsetcomp.com for compatibility information.
Specifications
Measurement
range
± 3 g; 29.4 m/s² (96.5 ft/s²)
Accuracy
± 0.075 g; 0.735 m/s² (2.41 ft/s²) at 25°C (77°F)
± 0.105 g; 1.03 m/s² (3.38 ft/s²) from -20°C to 70°C (-4°F to
158°F)
Resolution 0.025 g; 0.245 m/s² (0.8 ft/s²)
Logging
interval
1 second to 18 hours, 12minutes, 15 seconds in Normal mode
0.01 seconds (100 Hz) to 0.99 seconds (1.01 Hz) in Fast mode
Time accuracy ± 1 minute per month at 25°C (77°F), see Plot A
Operating
range
In water/ice: -20° to 50°C (-4° to 122°F)
In air: -20° to 70°C (-4° to 158°F)
Water depth
rating
30 m from -20° to 20°C (100 ft from -4° to 68°F), see Plot B
Battery life
1 year typical use in Normal mode;
7 days logging at 0.01 seconds (100 Hz) in Fast mode
Memory
64K bytes (approximately 21.8K combined x-, y-, and z-axis
readings or events)
Materials Polypropylene case; stainless steel screws; Buna-N o-ring
Weight 18 g (0.6 oz)
Dimensions 58 x 33 x 23 mm (2.3 x 1.3 x 0.9 inches)
The CE Marking identifies this product as complying with the
relevant directives in the European Union (EU).
-125
-100
-75
-50
-25
0
25
-20 0 20 40 60
Temperature (°C)
Timebase Error (ppm)
Plot A
0
10
20
30
40
-20 0 20 40 60
Temperature (°C)
Depth (m)
Waterproof
range
Plot B