onset HOBO Data Loggers The HOBO Light On/Off data logger monitors indoor light changes with an internal sensor. Using HOBOware®, you can easily configure the logger to record light on and off conditions making it ideal for building energy audits and light usage analysis. This compact data logger has a built-in LCD screen for checking status, remaining battery level, and memory consumption. You can also use the LCD screen to quickly calibrate the logger to the light level in your building or you can set calibration to preset sensitivity thresholds with HOBOware. There are two models of the HOBO Light On/Off data logger: the UX90-002 has 128 KB of memory while the UX90-002M has 512 KB. Specifications HOBO Light On/Off Data Logger Models: UX90-002 UX90-002M Included Items: • Command™ strip • Double-sided tape • Hook & loop strap Required Items: • HOBOware 3.3 or later • USB cable (included with software) Accessories: • Light pipe (UX90-LIGHT-PIPE-1) • U-Shuttle (U-DT-1) Light Threshold Light Type Memory Modes Start Modes Stop Modes Time Accuracy Power Source Battery Life Memory Download Type Full Memory Download Time Logger Operating Range > 65 lux LED, CFL, fluorescent, HID, incandescent, natural Wrap when full or stop when full Immediate, push button, date & time, or next interval When memory full, push button, or date & time ±1 minute per month at 25°C (77°F) (see Plot A) One 3V CR2032 lithium battery and USB cable 1 year typical use UX90-002: 128 KB (84,650 measurements, maximum) UX90-002M: 512 KB (346,795 measurements, maximum) USB 2.0 interface 10 seconds for 128 KB; 30 seconds for 512 KB Size Weight Environmental Rating Logging: -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing) Launch/Readout: 0° to 50°C (32° to 122°F) per USB specification LCD is visible from: 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range 3.66 x 5.94 x 1.52 cm (1.44 x 2.34 x 0.6 in.) 23 g (0.81 oz) IP50 The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

HOBO Light On/Off Data Logger (UX90-002x) Manual Logger Components and Operation Battery Tray Start/Stop Button Calibration Button The logger has been launched with a push button stop enabled; press and hold the Start/Stop button for 3 seconds to stop the logger. Note: If you also launched the logger with a push button start, this symbol will not appear on the display for 5 minutes. Light Sensor LCD Screen Mounting Loop The battery indicator shows the approximate battery power remaining. Mounting Loop Description The logger is waiting to be launched. Press and hold the Start/Stop button for 3...

HOBO Light On/Off Data Logger (UX90-002x) Manual HOBO Light On/Off Data Logger (UX90-002x) Manual Important: USB 2.0 specifications do not guarantee operation outside the range of 0°C (32°F) to 50°C (122°F). • When the logger has stopped logging, the LCD screen will remain on until the logger is offloaded to a computer or HOBO U-Shuttle (unless launched with the "Turn LCD Off" option). Once the logger has been offloaded and disconnected from the computer, the LCD will turn off automatically after 2 hours. The LCD will turn back on the next time the logger is connected to the computer. Setting...

HOBO Light On/Off Data Logger (UX90-002x) Manual HOBO Light On/Off Data Logger (UX90-002x) Manual Time Approximate Approximate Between Total Data Logging Duration Logger Part Events Points (1 Year Battery Life) Number • Maximize the signal strength on the logger LCD screen by adjusting the light pipe while looking at the signal bars (see Calibrating the Light Sensor for more details on signal strength). • Be sure to secure the light pipe after the signal has been optimized. • Do not support the logger by the light pipe. • Be sure that the pipe is seated all the way into the bracket before deployment....

HOBO Light On/Off Data Logger (UX90-002x) Manual 2. Press the Calibrate button for 1 second. The LCD screen will display the signal strength of the light. The signal strength should ideally be at least 3 bars. Orient the logger as necessary to increase the signal strength. 3. Press the Calibrate button for 3 seconds while "HOLD" appears on the LCD screen. Move your hand away from the logger to prevent shadowing. The logger will count down to the auto-calibration and then display either "PASS" or "FAIL" after calibration is complete. 4. If the auto-calibration fails, point the sensor directly...

HOBO Light On/Off Data Logger (UX90-002x) Manual The logger can also be powered by the USB cable when the remaining battery voltage is too low for it to continue logging. Connect the logger to the computer, click the Readout button on the toolbar, and save the data as prompted. Replace the battery before launching the logger again. To replace the battery: 1. Holding the logger with the LCD screen facing up, pull the battery tray out of the logger housing. Battery tray removed from logger 2. Remove the old battery from the tray. 3. Place the new battery in the tray with the positive side facing...