UTA, "Amplificador Universal Transconductor"

Puede ser alimentado directamente del HOBO 

The UTA is a special purpose amplifier that converts the microamp-level current output of LI-COR light sensors to a corresponding signal voltage. The UTA can be configured at EME Systems or by the end user for any one of the three standard LI-COR sensors, and for any one of four popular output voltage ranges, through the manipulation of two plug-in jumpers. The UTA provides a simple interface between LI-COR sensors and voltage input data loggers, chart recorders, HVAC, and greenhouse control systems.

  LI-COR sensor Typical full sun response UTA output ( user selectable ) 
 LI190 PAR sensor 10µA @ 2000 µE/m2s 1, 2, 5, 10 Volts out @ 12.5µA in 
 LI200 Pyranometer 100µA @ 1000 W/m2  1, 2, 5, 10 Volts out @ 125µA in 
 LI210 Photometer 40µA @ 100 klux (=9290 ftcd) 1, 2, 5, 10 Volts out @ 50µA in 

Alternate gain settings are available on special order. One of the most popular alternate settings is a 2.5V output for use with Onset HOBO data loggers. The calibration tag provided by LI-COR with each sensor, in conjunction with the gain setting of the UTA, can be used to compute the light levels incident on the sensor with a high degree of accuracy.

On the UTA shown in the photo, the input cable from the sensor will enter through the gland nut to the left, and the output cable to the equipment will exit through the gland nut on the right. The UTA is also available with a BNC connector on the input.* The calibration label on the outside of the enclousure is marked with the applicable gain setting. Wiring instructions and calibration notes are included with each UTA.

Especificaciones:

· Supply Voltage: 5 to 24 VDC (supply volts > output volts + 2)

· Supply Current: less than 1mA ¥ Supply Voltage variation effect: less than 0.01% per Volt

· Operating Temperature: -30'C to +70'C

· Tempco: less than 0.01% per 'C

· Gain accuracy:± 1% FSO all ranges ± 0.2% on factory preset range

· Voltage output in darkness: <0.2% FSO

· Output impedance: 1000* ±1%

· NEMA 4 gasketed white polycarbonate enclosure: 1.37" x 1.96" x 2.55" (4.15" with gland nuts. Please see photo and mounting template diagram. Weight, 4 oz.

· gland nut at output, gland nut or BNC at input.

· Phoenix¨ beryllium/copper i/o terminals. See diagram.

· Input connector: two terminals for LICOR for shield and center conductor, or BNC connector

· Output connector: threeterminals, for + power, signal, and common.

· Complete instructions are included with the UTA order