Date SECTION 40 91 13XX Project Number SPECTROMETRIC NITRATE

date section 40 91 13.xx project number spectrometric nitrate and nitrite process measurement devices project name page 6 1.

Date SECTION 40 91 13.XX
Project Number SPECTROMETRIC NITRATE AND NITRITE PROCESS MEASUREMENT
DEVICES
Project Name Page 6
1.
GENERAL
1.
DESCRIPTION
A.
Section Includes
1.
Sensors, cables, and associated equipment for measuring
nitrate, and nitrite (NI version) in water and wastewater
treatment systems. Controllers and expansion modules
required for a complete monitoring system are specified
elsewhere.
A.
Scope
1.
Furnish, install, calibrate, test, adjust, and place into
satisfactory operation spectrometric sensors as shown on
the Drawings and specified herein in accordance with the
contract documents.
2.
The Drawings and Specifications illustrate and specify
functional and general construction requirements of
spectrometric sensors and do not necessarily show or
specify all components, wiring, piping, and accessories
required to make a completely integrated system. Provide
all components, piping, wiring, accessories, and labor
required for a complete workable and integrated system.
B.
Coordination: Coordinate with other suppliers for installation
of all items specified herein and required to ensure the
complete and proper interfacing of all the components and
systems.
1.
PERFORMANCE REQUIREMENTS
A.
Design Requirements
1.
Design measurement system for continuous monitoring in situ.
2.
Measurement system shall be a component of a process
monitoring system capable of monitoring up to 20 parameters
simultaneously on each controller. Measurement locations
shall be networked together in a linear, star, or branched
topology with a single 2-wire cable that distributes 12 V
power and communications.
3.
The measurement system shall be capable of simultaneous
display of nitrate and nitrite from one sensor.
4.
The sensor assembly shall be a separate unit from the sensor
connection cable and able to be located anywhere in the
monitoring network a SensorNet terminal is available.
A.
Performance Requirements
1.
Operating range
a.
Temperature: 32°F to 113°F (0°C to 45°C)
b.
Pressure: less than or equal to 1 bar (gauge)
c.
pH: 4 S.U. to 12 S.U.
d.
Flow velocity: < 3 m/s (1 ft./s)
2.
Measuring range [NitraVis 701 IQ]
a.
Nitrate­­
1.
Untreated wastewater
i.
0 mg NO3 / L to 300 mg NO3 / L
ii.
0 mg NO3-N / L to 60 mg NO3-N / L
2.
Bioreactor
i.
0 mg NO3 / L to 300 mg NO3 / L
ii.
0 mg NO3-N / L to 60 mg NO3-N / L
3.
Treated wastewater
i.
0 mg NO3 / L to 750 mg NO3 / L
ii.
0 mg NO3-N / L to 150 mg NO3-N / L
b.
Nitrite [NitraVis 701 NI]
1.
Untreated wastewater
i.
0 mg NO2 / L to 120 mg NO2 / L
ii.
0 mg NO2-N / L to 30 mg NO2-N / L
2.
Bioreactor
i.
0 mg NO2 / L to 120 mg NO2 / L
ii.
0 mg NO2-N / L to 30 mg NO2-N / L
3.
Treated wastewater
i.
0 mg NO2 / L to 300 mg NO2 / L
ii.
0 mg NO2-N / L to 75 mg NO2-N / L
2.
Measuring range [NitraVis 705 IQ]
1.
Treated wastewater
i.
0 mg NO3 / L to 250 mg NO3 / L
ii.
0 mg NO3-N / L to 50 mg NO3-N / L
2.
Nitrite [NitraVis 705 NI]
i.
0 mg NO2 / L to 100 mg NO2 / L
ii.
0 mg NO2-N / L to 25 mg NO2-N / L
3.
Resolution
a.
Nitrate­­
1.
0.1 mg NO3 / L
2.
0.01 mg NO3-N / L
b.
Nitrite [NitraVis 701 NI]
1.
0.1 mg NO2 / L
2.
0.01 mg NO2-N / L
3.
Signal averaging: user selectable to provide a t90 from 10
min. to 60 min.
2.
QUALITY ASSURANCE
A.
Acceptable Manufacturers:
1.
Furnish spectrometric sensors by the named manufacturers.
2.
The named manufacturers have been specified to establish the
standard of quality and performance of the equipment to be
supplied.
3.
Manufacturer shall be ISO 9001 certified.
2.
PRODUCT DELIVERY, STORAGE, AND HANDLING
A.
Delivery and Acceptance Requirements: Deliver materials to
site in manufacturer’s original, unopened containers and
packaging, with labels clearly identifying product name and
manufacturer.
2.
Storage and Handling Requirements:
1.
Store and handle materials in accordance with
manufacturer’s instructions.
2.
Keep materials in manufacturer’s original, unopened
containers and packaging until installation.
3.
Store materials in clean, dry area indoors.
4.
Protect materials during storage, handling, and
installation to prevent damage.
5.
Temperature range for storage: 15°F to 120°F (-10°C to
50°C)
2.
SUBMITTALS
A.
Product data
1.
Sensor operating manual.
2.
Mounting bracket / sensor holder installation instructions.
2.
Manufacturer’s Certifications: Submit manufacturer’s
certification that materials comply with specified
requirements and are suitable for intended application.
3.
Warranty documentation: Submit manufacturer’s standard
warranties.
2.
PRODUCTS
1.
GENERAL
A.
Measurement principle shall be optical absorption by means of
a xenon flash lamp and multi-diode array to measure the
transmission of light through wastewater simultaneously from
256 separate wavelengths spanning the ultraviolet and visible
light spectrum.
B.
Connect nitrate sensor to field-mounted junction box or
expansion modules specified in Section 40 95 23 with sensor
connecting cable specified in Section 2.3.A.2.
C.
Nitrate measurement system components shall be designed to be
part of an analytical process control system with enhanced
protection from overvoltage due to lightning and power supply
fluctuations according to EN 61326 when installed using
manufacturer’s recommended components per manufacturer’s
instructions.
2.
MANUFACTURER
A.
Provide products from the following manufacturer:
1.
YSI Incorporated, 1700/1725 Brannum Lane, Yellow Springs, OH
45387. 1-800-765-4974.
2.
MANUFACTURED UNIT
A.
The spectrometric measurement system consists of the
following:
1.
Model NitraVis® 70x IQ (NI) spectrometric sensor.
a.
The sensor shall use an optical method that measures the
absorption spectrum of a sample at 256 discrete
wavelengths over a range from 200 nm to 390 nm.
b.
The sensor shall be factory-calibrated and ready for
measurement.
c.
The sensor shall have a non-mechanical integrated
ultrasonic cleaning system.
d.
The sensor shall have a digital output signal.
e.
The sensor shall detach from sensor cable allowing for
easy replacement or repair.
Frame1
2.
SACIQ-x,x [SACIQ-x,x SW] sensor connection cable.
a.
Capable of transmitting digital communications and low
voltage (24V) power
b.
Integrated shield.
c.
Connections
1.
Sensor-side: Quick fastener (threaded).
2.
Controller-side: tinned conductors
Frame2
2.
MATERIALS
A.
Sensor
1.
Shaft: Titanium Grade 2
2.
Measurement window: sapphire
3.
Center piece, end cap: PEEK
4.
Plug head connector housing: POM
5.
Plug: ETFE (blue) Tefzel®
6.
Protective ring: POM
7.
Certification: CE, cETLus
8.
EMI/RFI conformance
a.
EN 61326 Class B
b.
FCC Class A
9.
Safety
a.
EN 61010-1
b.
UL 61010-1
c.
CAN/CSA C22.2#61010-1
d.
IEC 62471
10.
Protection rating: IP68 with connection to SACIQ sensor
cable
11.
Warranty: 2 yrs.
A.
Sensor connection cable
1.
Conductors: Tin-coated stranded copper wire.
2.
Coupling ring: Stainless Steel 1.4571 (equivalent to
316Ti)
Frame3
3.
Ring: POM
Screw: Stainless Steel V4A
Frame4
4.
O-ring: NBR
5.
Enclosure: POM
6.
Nut: Stainless Steel 1.4571 (equivalent to 316Ti)
Frame5
7.
Protection ring: POM
8.
Cable sheath: PUR
9.
Protective cap: PVC
Frame6
10.
Protection rating: IP68 (waterproof)
11.
Warranty: 12 months
2.
ACCESSORIES
Frame7
A.
Handrail swing mounting assembly
1.
YSI model 109 281Y BE/ST 170-R Pipe Mounting Stand
2.
YSI model 109 272Y Swing Mounting Assembly
3.
YSI model 481 073Y Horizontal Chain Mount [horizontal mount]
4.
YSI model 109 320Y Single Sensor Holder [vertical mount]
A.
Handrail Pipe mounting assembly:
1.
YSI model 2458000Y SMK Quick Release Stainless Steel
Handrail Mounting Bracket with 1.5-inch Mounting Adapter
B.
Compressed air cleaning system [Options: external air supply;
cleaning air box supply]
Frame8
1.
Model: Cleaning Air Box
Frame9
2.
The cleaning system shall use clean, dry, oil free air.
3.
Sensor-controlled cleaning cycles.
4.
Cleaning set Model SET/AP: connector and 15 m of tubing.
5.
Cleaning pressure: between 30 and 50 psi.
6.
Each sensor shall have a dedicated cleaning compressor.
Frame10
7.
Power supply: 115 VAC.
Frame11
3.
EXECUTION
1.
INSTALLATION
A.
Immersion sensors:
1.
Immerse sensor to a depth sufficient to fill the measuring
gap but not greater than 10 m.
2.
Protect the probe against the oncoming flow of large
objects.
3.
Install instrument to prevent air bubbles from gathering on
the optical sensing element.
a.
Horizontal installation: Align sensor parallel to flow
with measuring gap opening on the side
b.
Vertical installation: Align measuring gap
perpendicular to the flow direction.
4.
Impact protection
a.
Mount shock protectors to absorb inadvertent impacts.
b.
Mount sensor so that it cannot knock against a wall or
other obstacle.
A.
Sensor connection cable
1.
Bend radius
a.
Permanent bend: not less than 3.2 in. (80 mm).
b.
One-time bend: not less than 2 in. (50 mm).
2.
START-UP
A.
Install spectrometric sensors in strict accordance with the
manufacturer’s instructions and recommendations.
B.
Manufacturer’s representative will include a half-day of
start-up service by a factory-trained technician, if
requested.
1.
Contractor will schedule a date and time for start-up.
2.
Contractor will require representatives of the following
be present during the start-up:
a.
General contractor
b.
Electrical contractor
c.
YSI factory-trained representative
d.
Owner’s personnel
e.
Engineer
END OF SECTION