User Manual

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HOBO® Pendant® Temperature/Light

Data Logger (UA-002-xx) Manual

9556-K MAN-UA-002

The HOBO Pendant Temperature/Light Data Logger is a waterproof, two-channel logger with

10-bit resolution and can record up to approximately 3,500 (8K model) or 28,000 (64K model)

combined temperature and light 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.

Specifications

Measurement Range

Temperature: -20° to 70°C (-4° to 158°F)

Light: 0 to 320,000 lux (0 to 30,000 lumens/ft

)

Accuracy

Temperature: ± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F), see

Plot A

Light intensity: Designed for measurement of relative light levels, see Plot D

for light wavelength response

Resolution Temperature: 0.14°C at 25°C (0.25°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%

Water: 5 minutes, typical to 90%

Time Accuracy ±1 minute per month at 25°C (77°F), see Plot B

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 C

NIST Traceable

Certification

Available for temperature only at additional charge; temperature range

-20° to 70°C (-4° to 158°F)

Battery Life 1 year typical use

Memory

UA-002-08: 8K bytes (approximately 3.5K combined temperature and light

readings or events)

UA-002-64: 64K bytes (approximately 28K combined temperature and light

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 all relevant

directives in the European Union (EU).

Plot A Plot B

HOBO Pendant

Temperature/Light

Data Logger

Models: UA-002-08

UA-002-64

Required Items:

• HOBOware 2.x or later

• USB cable (included with

software)

• Pendant Optic USB Base

Station & Coupler (BASE-U-1)

• Optic USB Base Station

(BASE-U-4) or HOBO

Waterproof Shuttle

(U-DTW-1) & Coupler

(COUPLER2-A)

Summary of content (4 pages)

PAGE 1
HOBO® Pendant® Temperature/Light Data Logger (UA-002-xx) Manual The HOBO Pendant Temperature/Light Data Logger is a waterproof, two-channel logger with 10-bit resolution and can record up to approximately 3,500 (8K model) or 28,000 (64K model) combined temperature and light 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.
PAGE 2
HOBO Pendant Temperature/Light Data Logger (UA-002-xx) Manual Specifications (continued) 120 40 Pendant 100 Eye 20 Response (%) Depth (m) 30 Waterproof range 80 60 40 10 20 0 -20 0 20 40 0 60 0 200 400 Temperature (°C) 600 800 1000 1200 1400 Wavelength (nm) Plot C Plot D 1. Plug the USB connector on the base station into an available USB port on your computer. Deployment/Mounting The Light Sensor response is roughly cosine dependent with the angle from vertical.
PAGE 3
HOBO Pendant Temperature/Light Data Logger (UA-002-xx) Manual 5. Use the logger software to set up the alarms, launch, and read out the logger. Light Measurement The logger measures light intensity in units of lumens per square foot (US) or lux (SI). The light sensor in the Pendant logger measures a much broader spectrum of light wavelengths than are visible to the human eye. Plot D shows that the logger's response extends farther into ultraviolet and infrared wavelengths than the eye's response.
PAGE 4
HOBO Pendant Temperature/Light Data Logger (UA-002-xx) Manual Battery The logger requires one 3-Volt CR-2032 lithium battery. Battery life varies based on the temperature and the frequency at which the logger is recording data (the logging interval). A new battery typically lasts one year 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.