SOW FOR RFQ.pdf

Request for Quotation Number 1333ND20QNB600606

Statement of Work

BACKGROUND

The National Institute of Standards and Technology (NIST), Special Programs Office, Greenhouse Gas (GHG)

Measurements Program, provides expertise and research capability in the field of GHG measurements to sup-port atmospheric observations for use in estimating emissions. One goal of the group’s research is to develop and evaluate new methodologies for quantifying GHG emissions (specifically, of carbon dioxide (CO2) and me-thane (CH4)) that are based on atmospheric observations. NIST has established a GHG measurements testbed system where measurement of CO2 and CH4 mole fraction is an integral part of the associated observing sys-tems. The third testbed, located in the Baltimore and Washington DC region, is based on a commercially ob-tained GHG observing and data transfer and management system. The mole fraction measurement instrument that is the heart of these observing systems was chosen to meet the stringent requirements given below for CO2 and CH4 mole fraction measurement.

Expansion of some of these observing systems to include additional trace gas species measurements is desired to assist in the determination of the source of origin of CO2 or CH4. Carbon monoxide (CO) is the trace gas of interest because it primarily originates from combustion sources and the abundance of CO relative to CO2 indi-cates the type of combustion which can be used to identify the source of the CO2 plume.

BRAND NAME JUSTIFICATION

Fundamental to this effort is establishing and operating multi-node, atmospheric GHG concentration observing networks in each testbed location. NIST and its collaborators use this data to determine GHG flows in and around each testbed location by combining it with weather and related information. NIST research grants with private sector and university collaborators provide network observing node capabilities for each testbed. Gener-ally, network data streams are provided on a 24/7 basis along with one or more weather station(s) that are incor-porated to provide local meteorological parameter observations.

Expansion of some of these observing systems to include additional trace gas species measurements is desired to assist in the determination of the source of origin of CO2 or CH4. Carbon monoxide (CO) is the trace gas of interest because it primarily originates from combustion sources and the abundance of CO relative to CO2 indi-cates the type of combustion which can be used to identify the source of the CO2 plume.

To meet mission needs, NIST requires the acquisition of a Picaro G2401 analyzer. This analyzer is capable of measuring CO2, CH4, CO, and water vapor with a repetition rate of less than 5 seconds at high precision levels.

(Water vapor measurements are required to correct the other three species for its interference; the water vapor measurement is thus necessary to achieve the stringent performance required of the other measurements).

The required Picarro analyzer will be deployed in an existing rack-based system and with a communications protocol for data collection and system monitoring and control already developed and will be a direct replace-ment for a Picarro analyzer used in the existing observing system. This analyzer must satisfy very specific pre-cision requirements for achieving the goals of NIST’s research program. The analyzer must meet all of the re-quirements identified herein, must be able to communicate properly with the existing GCWerks, Inc. software interface to ensure it is functional within the rack based system upon replacement, must be able to sustain long-term operation with minimal repair or maintenance by a technician (months between visits, even years), as well as remote operation capability, remote communications through the internet and measurement stability with minimal use of calibration gases on-site.

SPECIFIC REQUIREMENTS

The Contractor shall provide one (1) analyzer, Picarro G2401, meeting all of the following specifications:

a. Analyzer must measure carbon dioxide (CO2), methane (CH4), carbon monoxide (CO), and water vapor

(H2O) in a single continuous sample stream.

b. All four species must be measured every < 5 seconds.

c. 5-second precision (1-sigma) requirements for each species are as follows:

• CO2: <= 0.05 parts per million (ppm)

• CH4: <= 1 ppb

• CO: <= 15 ppb

• H2O: <= 30 ppm

d. Additional requirement for precision (1-sigma) of 60-minute average:

• CO2: <= 0.02 ppm

• CO: <= 1 ppb

• CH4: <= 0.5 ppb

e. Maximum drift at STP over 24 hours (of a 60-minute average):

• CO2: <= 0.15 ppm

• CH4: <= 1 ppb

• CO: <= 15 ppb

f. Maximum drift over 1 month:

• CO2: <= 0.5 ppm

• CH4: <= 3 ppb

• CO: <= 50 ppb

g. Operating measurement range:

• CO2: 0 – 1000 ppm

• CH4: 0 – 20 ppm

• CO: 0 – 5 ppm

h. Analyzer software must provide automated determination of a dry mole fraction (i.e. internally pro-grammed water vapor correction).

i. The analyzer must provide temperature and pressure control on the measurement cell to achieve stability and precision requirements.

j. Flow rate into the analyzer must be adjustable between 30 and 300 sccm at ambient pressure by the user with an upstream or downstream orifice.

k. Analyzer must have the ability to measure incoming samples with pressures between 40 and 133 kPa.

l. Analyzer must be able to operate in ambient temperatures ranging from 10 to 35 degrees C.

m. Analyzer is required to have a physical sample cavity volume of less than 35 mL allowing for fast sam-ple throughput and quick response time at the flow rates described above.

n. Analyzer must be rack-mountable, with dimensions 17” W and < 20” d to fit into a standard 19-inch electronics rack enclosure, and height < 10” to fit into the existing rack with other instruments.

o. Analyzer weight < 60 lbs to be easy to deploy in the field by single technician.

p. Analyzer power requirements are < 150 W (not including a pump) at steady state.

q. Analyzer must be able to communicate properly with the existing software interface (GCWerks, Inc.

Software), to minimize additional labor required to operate it with the existing system.

• This requires that measurements must be streamed through either Ethernet or RS-232 (user op-tion, analyzer should be able to do both) in real-time, in addition to being visible on a display.

• User must be able to change the output format of the data stream (what variables are streamed for example).

• Auxiliary measurements required for monitoring instrument performance, such as the optical measurement cell temperature and pressure and the overall instrument temperature. These pa-rameter values must also be streamed through Ethernet or via an RS-232 connection.

r. Instrument must have software that enables it to control a multi-port valve through a second RS-232 connection (such as Vici Valco valve), for sample switching in the field deployment.

s. Analyzer must have the capability to be remotely re-started in order to re-establish communication with supervisory software of the observing system of which it is a component.

t. Analyzer must have the ability to allow for remote login into the system via internet, including having the ability for software parameters to be changed remotely (e.g. user ability to change output data format when logged in remotely, or run internal diagnostics for malfunction identification).

Warranty and support

• Contractor must provide telephone assistance and troubleshooting. Support includes capability to re-motely log in and diagnose system and perform any repairs that are possible via remote connection (in-cluded in the cost).

• Additionally, a one-year warranty must be included in the cost. Manufacturer warranty includes parts and labor, with repairs performed by the vendor at the vendor site.