Attachment_Salient_Characteristics.docx

Salient Characteristics S19077 The USGS Water Science in Sacramento, CA needs to purchase 1 (one) Eddy Convariance System. This equipment needs to be able to handle the long-term use in harsh environments.

EDDY CONVARIANCE SYSTEM

SALIENT CHARACTERISTICS:

C02/H20 Open-Path Gas Analyzer and 3d Sonic Anemoeter:

1. Shall have operating temperature range from -30° to +50°C.

2. Shall have input voltage range from 10.5 to 16.0 Vdc.

3. Shall have power at 12 W.

4. Shall have system enclosure no larger than 54 x 44.5 x 29.7 cm (21.3 x 17.5 x 11.7 in.) and weigh no more than 15.36 kg (33.85 lb) and 16.24 kg (35.8 lb) with analog input module.

5. Shall have pump module.

a. Shall have 3/8-in. Swagelok inlet connection.

b. Shall have pressure sensor range from 15 to 115 kPa.

c. Shall have pumping speed from 3 to 9 LPM (automatically controlled at the set point, typically 7 LPM).

6. Shall have three-valve module.

a. Shall have Zero, CO2, and H2O span inlets for module.

b. Shall have Analyzer and H2O bypass Outlets.

c. Shall have ¼-in. Swagelok connections.

d. Shall be no larger than 14.0 x 12.7 x 14.0 cm (5.5 x 5.0 x 5.5 in.) and weigh no more than 1.5 kg (3.3 lb).

7. Shall have scrub module.

a. Shall run on 8 W with heater running, 0 W quiescent, and 2 W with pump running.

b. Shall have cylinder volume of 480 cm3 each (29.29 in.3 each).

c. Shall have molecular sieve size no larger than 1.6 to 2.5 mm beads (0.063 to 0.098 in. beads).

d. Shall have enclosure dimensions no larger than 39.4 x 34.3 x 20.3 cm (15.5 x 13.5 x 8.0 in.) and weigh no more than 9.6 kg (21.1 lb).

8. Shall have sonic sensor.

a. Shall have measurement path length of 5.8 cm (2.3 in.) horizontal and 10.0 cm (3.94 in.) vertical.

b. Shall have path angle from horizontal at 60°.

c. Shall have sealed sonic transducers and electronics construction.

d. Shall have stainless-steel tubing anemometer head materials.

e. Shall have welded aluminum electronics box.

f. Shall have operating temperature range from -30° to +50°C.

g. Shall have voltage supply of 10 to 16 Vdc.

h. Shall have CSI 33.3 k baud serial interface for data logger/sensor communication that has data type of 2-byte integer per output plus 2-byte diagnostic.

i. Shall have support arm diameter of 1.59 cm (0.63 in.).

j. Shall have transducer diameter of 0.64 cm (0.25 in.).

k. Shall have transducer mounting arm diameter of 0.84 cm (0.33 in.).

l. Shall have anemometer head no larger than 47.3 x 42.4 cm (18.6 x 16.7 in.) and weigh no more than 1.7 kg (3.7 lb).

m. Shall have ux, uy, uz are wind components referenced to the anemometer axes and c is speed of sound.

n. Shall have speed of sound determined from three acoustic paths; corrected for crosswind effects.

o. Shall have measurement rate programmable from 1 to 60 Hz, instantaneous measurements. Two over-sampled modes are block averaged to either 20 Hz or 10 Hz.

p. Shall have output bandwidths of 5, 10, 12.5, or 20 Hz.

q. Shall have 10, 20, 25, or 50 Hz output rate.

r. Shall have resolution values for instantaneous measurements made on a constant signal; noise is not affected by sample rate 1 mm/s rms (ux, uy), 0.5 mm/s rms (uz), and 15 mm/s (0.025°C) rms (c).

s. Shall have offset error of less than ±4.0 cm/s (uz) and less than ±8.0 cm/s (ux, uy) assuming the -30° to +50°C range, wind speeds of less than 30 m/s, and wind angles between ±170°.

t. Shall have gain error less than ±6% of reading (wind vector within ±20° of horizontal), less than ±3% of reading (wind vector within ±10° of horizontal), and less than ±2% of reading (wind vector within ±5° of horizontal) assuming the -30° to +50°C range, wind speeds of less than 30 m/s, and wind angles between ±170°.

u. Shall have ultrasonic signal processing and user-installable wicks for the performance of the anemometer under all rain events.

v. Shall have digital USB and RS-485 output signal with baud rate at 230400 bps (maximum) and comma-delimited ASCII data type.

w. Shall have SDM, USB, and RS-485 digital outputs reporting range for full-scale wind at ±65.535 m/s autoranging between four ranges (least significant bit is 0.25 to 2 mm/s.) and speed of sound at 300 to 366 m/s (-50° to +60°C) least significant bit is 1 mm/s (0.002°C).

9. Shall have tower mounting.

10. Shall have datalogger.

a. Shall have operating temperature range from -40° to +70°C.

b. Shall have high-impact-resistant polycarbonate and UV-resistant TPE, recycle code 7 case material.

c. Shall have twelve (12) individually configured inputs for analog or digital functions universal inputs.

d. Shall have sixteen (16) pulse counters.

e. Shall have CS I/O, SDI-12, RS-485, CPI, RS-232, USB Micro B, and Ethernet communications ports.

f. Shall have microSD data storage ports.

g. Shall have two (2) Switched 12 Volt terminals.

h. Shall have sixteen (16) terminals configurable for digital input and output that are configurable in pairs for 5 V or 3.3 V logic for some functions.

i. Shall have input limits at ±5 V.

j. Shall have analog voltage accuracy at ±(0.04% of measurement + offset) at 0° to 40°C, (accuracy specifications do not include sensor or measurement noise), ±(0.08% of measurement + offset) at -55° to +85°C (extended temperature range), and ±(0.06% of measurement + offset) at -40° to +70°C.

k. Shall have ADC at 24-bit.

l. Shall have power requirements at 10 to 18 Vdc for battery input (BAT) and 16 to 32 Vdc for charger input (CHG).

m. Shall have real-time clock accuracy at ±3 min. per year (optional GPS correction to ±10 µs).

n. Shall have Ethernet, PPP, CS I/O IP, RNDIS, ICMP/Ping, Auto-IP(APIPA), IPv4, IPv6, UDP, TCP, TLS, DNS, DHCP, SLAAC, SNMPv3, NTP, Telnet, HTTP(S), FTP(S), SMTP/TLS, and POP3/TLS internet protocols.

o. Shall have CPI, PakBus, SDM, SDI-12, Modbus, TCP, DNP3, UDP, NTCIP, NMEA 0183, I2C, SPI, and other communication protocols.

p. Shall have 3 year warranty against defects in materials and workmanship.

q. Shall have battery-backed SRAM for CPU usage & final storage of 4 MB.

r. Shall have data storage at 4 MB SRAM + 72 MB flash (Storage expansion of up to 16 GB with removable microSD flash memory card.).

s. Shall have idle current drain, average at less than 1 mA, assumes 12 Vdc on BAT terminals; add 2 mA if using CHG terminals.

t. Shall have active current drain, average at 3 mA (1 Hz scan), and 67 mA (20 Hz scan) assumes 12 Vdc on BAT terminals; add 2 mA if using CHG terminals.

u. Shall support static vibrating-wire measurements.

v. Shall be no larger than 21.0 x 10.2 x 5.6 cm (8.3 x 4.0 x 2.2 in.) and weigh no more than 0.42 to 0.52 kg (0.92 to 1.15 lb) depending on communication option selected.

11. Shall include 16-channel 5 V analog input module.

a. Shall have standard 1-in. grid mounting.

b. Shall have operating temperature range from -40° to +70°C.

c. Shall have power requirements of 9.6 to 32 Vdc voltage.

d. Shall have estimated accuracy of ±(0.06% of reading + offset) -40° to +70°C, ±(0.04% of reading + offset) 0° to 40°C, and ±(0.08% of reading + offset) -55° to +85°C.

e. Shall have sixteen (16) differential or thirty-two (32) single-ended inputs number of channels.

f. Shall have thirty-two (32) single-ended or sixteen (16) differential (with ±5000 mV, ±1000 mV, ±200 mV ranges 24 bit ADC) analog inputs.

g. Shall have maximum multiplexed sample rate of 3.0 kHz (using fast [100 μs] input setting).

h. Shall have maximum burst sample rate of 30 kHz.

i. Shall have input range from ±5000 mV, ±1000 mV, and ±200 mV.

j. Shall have traditional period averaging on analog input channels.

k. Shall have CPI for data logger connection with baud rate selectable from 50 kbps to 1 Mbps. (Allowable cable length varies depending on baud rate, number of nodes, cable quality, and noise environment, but can be as long as 700 m under proper conditions.)

l. Shall have USB 2.0 full speed connection available for attaching to a PC. (Port is used to configure the module and download updates.)

m. Shall have one year warranty against defects in materials and workmanship.

n. Shall be no larger than 20.3 x 12.7 x 5.1 cm (8 x 5 x 2 in.) and weigh no more than 0.9 kg (1.95 lb).

o. Shall have typical current drain in sleep mode at less than 1 mA, active mode at 1 Hz scan at 2 mA (estimated) assuming one single-ended measurement with the first notch frequency (fN1) at 30 kHz, and active 20 Hz scan at 20 mA assuming one single-ended measurement with the first notch frequency (fN1) at 30 kHz.

p. Shall have voltage excitation at ±5 V (at 50 mA), current excitation at ±2.5 mA (±5 V compliance voltage), and four (4) voltage/current excitation outputs.

q. Shall have four (4) of SW5V outputs, SW5V output resistance of 30 Ω, two (2) of SW12V outputs, typical limit of SW12V outputs of 200 mA, minimum limit of SW12V outputs of 180 mA, two (2) 12V outputs, typical limit of 12V outputs at 200 mA, and minimum limit of 12V outputs of 180 mA general purpose outputs.

Pump Tubing Assembly:

12. Shall be compatible with analyzer specification above and pump module.

13. Shall include Swagelok fittings.

14. ½ in plastic tubing.

15. Shall be 40 ft long.

Calibration Gas Tubing Assembly:

16. Shall be compatible with analyzer specification above.

17. Shall be for the zero calibration, CO2 span, and H2O span.

18. Shall not include tee connection.

19. Shall have 40 ft long tubing.

Micro SD Card:

20. Shall be compatible with datalogger specs above.

21. Shall have storage capacity of at least 16 GB.

22. Shall have single-level cell (SLC) memory type.

23. Shall have operating temperature range from -40° to +85°C

24. Shall have water & dust ingress protection rating of IP57 (IEC 60529).

Smart 12V Charging Rgulator:

25. Shall be compatible with datalogger specs above.

26. Shall have operational temperature of -40° to +60°C (VRLA battery manufacturers state that “heat kills batteries” and recommend operating batteries at less than or equal to 50°C.)

27. Shall be no larger than 7.5 x 3.7 x 10 cm (3 x 1.5 x 3.9 in.).

28. Shall have AC charge to charge terminal of 18 to 24 VRMS (with 1.2 ARMS maximum).

29. Shall have DC charge to charge terminal of 16 to 40 Vdc (with 1.1 Adc maximum).

30. Shall have solar terminals for solar panel or other DC source.

a. Shall have battery voltages below 8.7 V may result in less than 3.0 A current limit because of fold-back current limit.

b. Shall have input voltage range from 15 to 40 Vdc.

c. Shall have maximum charging current of 4.0 Adc typical (3.2 to 4.9 Adc depending upon individual charger).

31. Shall have quiescent current.

a. Shall have no charge source present at 300 μA maximum.

b. Shall have no battery connected at 2 mA maximum.

c. Shall have CYCLE battery charging with Vbatt(T) = 14.70 V - (24 mV) x (T-25°C).

d. Shall have FLOAT battery charging with Vbatt(T) = 13.65 V - (18 mV) x (T-25°C).

e. Shall have accuracy at ±1% (on charging voltage over -40° to +60°C).

32. Shall have unregulated 12 V from battery.

a. Shall have four (4) A self-resettable thermal fuse hold current greater than 4 A (< 20°C).

b. Shall have a limit of 2.7 A (60°C), 3.1 A (50°C), and 4.0 A (20°C).

33. Shall have operating temperature at -40° to +60°C.

34. Shall have average battery voltage at ±(1% of reading + 15 mV).

35. Shall have average battery/load current regulator input voltage meauserments at ±(2% of reading + 2 mA) and impulse type changes in current may have an average current error of ±(10% of reading + 2 mA).

36. Shall have solar measurements with ±(1% of reading - 0.25 V) / -(1% of reading + 1 V) and 1.0 V negative offset is worst-case due to reversal protection diode on input; typical diode drop is 0.35 V.

37. Shall have continuous measurements with ±(1% of reading - 0.5 V) / -(1% of reading + 2 V) and 2.0 V negative offset is worst-case due to two series diodes in AC full-bridge. Typical diode drops are 0.35 each for 0.7 V total.

38. Shall have charger temperature of ± 2°C.

Battery:

39. Shall be compatible with analyzer specification above.

40. Shall have output voltage of 12 Vdc.

41. Shall have nominal rating at 7 Ah.

42. Shall weigh no more than 2.72 kg (6 lb).

Battery Bracket:

43. Shall be compatible with battery specification above.

Cable 22-AWG:

44. Shall be compatible with analyzer specification above.

45. Shall be a 22-AWG, four-conductor cable with a Santoprene jacket and an aluminum Mylar shield.

46. Shall have conductors stripped and tinned and have red, black, green, and white insulation colors.

47. Shall be 33 ft long.

Cable 16-AWG:

48. Shall be compatible with analyzer specification above.

49. Shall be a 16 AWG, two-conductor stripped cable with a Santoprene jacket and tinned wires.

50. Shall be 33 ft long.