Environmental
|
LI-250A Specifications
Accuracy:
25 °C: Typically ± 0.4% of reading ± 3 counts on the least significant digit displayed (all ranges).
0 - 55 °C: Typically ± 0.6% of reading ± 3 counts on the least significant digit displayed (all ranges).
Range Selection: Autoranging (3 ranges).
Linearity: ± 0.05%.
Sensors: Any LI-COR type "SA" or type "SB” sensor with BNC connector; Quantum, Pyranometer, or Photometric. Older LI-COR radiation sensors, or those without any connector must have a BNC connector installed. Contact LI-COR.
Sensor Calibration: Each sensor is supplied with a calibration multiplier. Calibration multipliers for two sensors can be stored in memory. Calibration multipliers are entered from the keypad.
Signal Averaging: Sensor output can be collected and displayed as a 15-second average (approximately 60 readings). Averages are retained on the display in HOLD mode.
Display: 4 1/2 digit LCD display. Updated every 0.5 seconds in Instantaneous mode.
Keypad: Sealed, 5-key tactile response keypad.
Battery Life: 150 hours typical with continuous operation.
Power Requirement: One 9V Eveready Alkaline #522 or equivalent (LI-COR part number 216).
Low Battery Detection: Low battery indicator displayed with approximately 20 hours battery life remaining.
Operating Conditions: 0 to 55 °C, 0 to 95% RH (non-condensing).
Storage Conditions: -55 to 60 °C, 0 to 95% RH (non-condensing).
Size: 14 cm L x 7.7 cm W x 3.8 cm D (5.5" x 3" x1.5").
Weight: 0.26 kg (0.57 lbs).
Warranty: 1 year parts and labor.
LI-250A Range and Resolution
| Sensor | Range | Resolution |
| Quantum | 199 µmol s-1 m-2 1999 19999 |
0.01 µmol s-1 m-2 0.1 1 |
| Radiometric | 19 W m-2 199 1999 |
0.001 W m-2 0.01 0.1 |
| Photometric | 1999 lux 19999 lux 199 lux |
0.1 lux 1 0.01 lux |
