Specifications
Current Inputs: 3 BNC connectors (used to connect LI-COR sensors)
Output Channels: Light, GPS (optional), Prompt, Battery Voltage
Math Channels: 8 math channels (addition, subtraction, multiplication, division, natural logarithm, integration, daily integration, attenuation)
Input Channel Frequency Rejection: >70dB at 50 or 60 Hz (1 input channel @ sampling rates of 1, 2, 5, 10, 20 Hz)
Input Channel Current Accuracy: ±0.3% of full scale reading @25 °C
Signal Ranges (Current) and Resolution:
| Range # | Current Range | Resolution (Typical) |
|---|---|---|
| 1 | 0 – 0.250 µA (micro-amps) | 0.0305 nA (nano-amps) |
| 2 | 0 – 2.50 µA (micro-amps) | 0.1525 nA (nano-amps) |
| 3 | 0 – 25 µA (micro-amps) | 1.525 nA (nano-amps) |
| 4 | 0 – 250 µA (micro-amps) | 15.25 nA (nano-amps) |
Measurement Ranges and Resolution by Sensor:
| Sensor Type | Range | Resolution |
|---|---|---|
| Terrestrial Quantum | R1: 0 – 50 µmol s-1 m-2 R2: 0 – 500 R3: 0 – 5000 R4: 0 – 50000 |
R1: 0.0061 µmol s-1 m-2 R2: 0.0305 R3: 0.305 R4: 3.05 |
| Line Quantum | R1: 0 – 36 µmol s-1 m-2 R2: 0 – 360 R3: 0 – 3600 R4: 0 – 36000 |
R1: 0.004392 µmol s-1 m-2 R2: 0.02196 R3: 0.2196 R4: 2.196 |
| Underwater Quantum | R1: 0 – 60 µmol s-1 m-2 R2: 0 – 600 R3: 0 – 6000 R4: 0 – 60000 |
R1: 0.00732 µmol s-1 m-2 R2: 0.0366 R3: 0.366 R4: 3.66 |
| Spherical Quantum | R1: 0 – 36 µmol s-1 m-2 R2: 0 – 360 R3: 0 – 3600 R4: 0 – 36000 |
R1: 0.004392 µmol s-1 m-2 R2: 0.02196 R3: 0.2196 R4: 2.196 |
| Pyranometer | R1: 0 – 3 W m-2 R2: 0 – 30 R3: 0 – 300 R4: 0 – 3000 |
R1: 0.000366 W m-2 R2: 0.00183 R3: 0.0183 R4: 0.183 |
| Photometric | R1: 0 – 1 klux
R2: 0 – 10 R3: 0 – 100 R4: 0 – 1000 |
R1: 0.000122 klux
R2: 0.00061 R3: 0.0061 R4: 0.061 |
Standard Modes (Continual, Manual, Daily, One Time):
Auto range for total sampling rate ≤ 3 Hz (e.g., 1 Hz sampling on 3 input channels)
Fixed range (selectable) for total sampling rates > 3 Hz (e.g., 2 Hz sampling on 2 input channels)
Raw Mode (1 – 500 Hz): Selectable Range
Sampling Rates:
Standard Modes: 1 sample per hour, 1 sample per minute, 1 sample per 10 seconds (0.1 Hz), 1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz
Raw Mode: 1 – 500 Hz (1 Hz through 500 Hz in whole number increments)
Logging Rates:
Standard Modes Sampling: Every Sample, 100 msec, 200 msec, 500 msec, 1 sec, 5 sec, 10 sec, 15 sec, 30 sec, 60 sec, 100 sec, 5 min, 15 min, 30 min, 1 hr, 2 hr, 3 hr, 6 hr, 12 hr, 24 hr
Raw Mode Sampling: Every sample (1–500 Hz)
Averaging (Standard Modes Sampling): Averaging windows depend on sampling rate
| Sampling Rate | Averaging Windows Available |
|---|---|
| 1 per Hour | none |
| 1 per Minute | none |
| 1 per 10 seconds (0.1 Hz) | 15 sec, 30 sec, 60 sec, 100 sec, 5 min, 15 min, 30 min, 1 hr, 2 hr, 3 hr |
| 1 Hz | 5 sec, 10 sec, 15 sec, 30 sec, 60 sec, 100 sec, 5 min, 15 min |
| 2 Hz | 1 sec, 5 sec, 10 sec, 15 sec, 30 sec, 60 sec, 100 sec, 5 min |
| 5 Hz | 500 msec, 1 sec, 5 sec, 10 sec, 15 sec, 30 sec, 60 sec, 100 sec |
| 10 Hz | 200 msec, 500 msec, 1 sec, 5 sec, 10 sec, 15 sec, 30 sec, 60 sec, 100 sec |
| 20 Hz | 100 msec, 200 msec, 500 msec, 1 sec, 5 sec, 10 sec, 15 sec, 30 sec, 60 sec |
Raw Mode Sampling: No averaging
Display: 128 x 64 graphics display
Real-Time Clock: Year, Month, Day, Hour, Minute, Seconds; Accuracy of ±3 minutes per month
Data Storage Capacity: 1 GB (FAT16 file system)
Communications: USB (as mass storage device)
Global Positioning System: (Optional)
GPS RADIONOVA® RF Antenna Module
Horizontal position accuracy: 2.5 m CEP (50% Circular Error Probability, Open-Sky, 24hr Static, good view of the sky).
Maximum position update rate: 1 Hz.
GPS receiver sensitivity, autonomous acquisition: -148dBm.
Time to first fix (TTFF), hot start: 1 second.
TTFF, warm start: 6 seconds (typical).
TTFF, cold start (with good view of the sky): 37 seconds at 90% probability.
Power Supply Options: 4 “AA” size batteries, USB, AC–DC power adapter
80 hours life (typical usage of 1 Hz sampling rate and logging rate)
30 hours life (typical usage with GPS option on)
Operating Temperature Range: -20 to 50 °C
Humidity Range: 0 to 95% RH (non-condensing conditions)
Storage Temperature Range: -40 to 65 °C
Size: 20.9 x 9.8 x 3.5 cm (8.2" x 3.9" x 1.4")
Weight: 0.454 kg (1.0 lb) with batteries