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

Battery Life:

80 hours life (typical usage of 1 Hz sampling rate and logging rate)

30 hours life (typical usage with GPS option on)

Environmental Conditions:

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