General Construction Specifications
SECTION 13322
METERING DEVICES
PART 1 - GENERAL
1.01 SECTION INCLUDES
A. Submersible head pressure level transmitters.
B. Combustible gas analyzers.
C. Appurtenances.
1.02 RELATED SECTIONS
A. Section 16180 - Equipment Wiring Systems.
B. Section 16190 - Supporting Devices.
1.03 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Shop Drawings: Indicate completing operating data, installation instructions, wiring diagrams, and written detailed operational description.
C. Product Data: Include description and engineering data for each component. Include sizing as requested.
D. Installation Details: Provide project specific installation details for each instrument.
E. Submit manufacturer's field reports under provisions of Section 01400.
F. Submit field reports indicating operating conditions after detailed check out of instruments at Date of Substantial Completion.
G. Extra material: Furnish a list of recommended spare parts and any special tools required for routine maintenance.
1.04 PROJECT RECORD DOCUMENTS
A. Submit record documents under provisions of Section 01720.
B. Accurately record actual installation.
1.05 OPERATION AND MAINTENANCE DATA
A. Submit operation and maintenance data under provisions of Section 01730.
B. Include descriptive literature for each piece of equipment, including a list and description of all parts.
C. Include systems descriptions, set points, and controls settings and adjustments.
D. Include inspection period, cleaning methods, recommended cleaning materials, and calibration tolerances.
1.06 QUALIFICATIONS
A. Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum three years documented experience.
1.07 EXTRA MATERIALS
A. Provide spare instruments, and all recommended spare parts and special tools under provisions of Section 01700.
B. Provide the following spare instruments:
1. Submersible head pressure level transmitter and sensor.
2. Combustible gas analyzer transmitter and sensor.
C. Provide combustible gas analyzer calibration kit, calibration gas cylinder and carrying case. Include all necessary components necessary for calibration of analyzers.
PART 2 - PRODUCTS
2.01 SUBMERSIBLE LEVEL TRANSMITTERS
A. Manufacturers:
1. Ametek, Inc.
2. Delta Controls Corporation.
3. Druck Incorporated.
4. Substitutions: Under provisions of Section 01600.
B. Type: Solid state, silicon piezoresistor.
C. Materials:
1. Sensing diaphragm: 316 stainless steel.
2. Sensor body: 316 stainless steel.
3. Fill fluid: Silicone oil.
4. Sensor signal cable: PVC or polyethylene insulated cable containing shielded electrical signal wires, a barometric vent tube, and strengthening strands.
D. Output: 2 wire, 4-20 MADC, isolated.
E. Excitation Voltage: 12 to 40 VDC.
F. Maximum Loop Resistance: 600 ohms at 24 VDC.
G. Accuracy: 0.5 percent of span.
H. Repeatability: 0.1 percent of span.
I. Temperature:
1. Effect: 0.5 percent of span per 40 degrees F. liquid temperature change.
2. Operating: -20 to 220 degrees F.
3. Compensation: 32 to 122 degrees F.
J. Barometric Compensation: Full.
K. Overrange Protection: Minimum 85 feet of water.
L. Circuit Housing:
1. Enclosure: NEMA 4. Provide enclosure with heater or desiccant to prevent moisture from entering barometric venturi tube.
2. Mounting: Remote from sensor on wall in electrical building as indicated on the Drawings.
3. Power Requirement: 100 to 132 VAC, 60 HZ, single phase.
4. Output Signal: 4-20 mADC.
5. Display: 3-1/2 inch, 3-digit, LED or backlighted LCD.
2.02 COMBUSTIBLE GAS ANALYZERS
A. Manufacturers:
1. MSA Instruments.
2. Sierra Monitor Corp.
3. Substitutions: Under provisions of Section 01600.
B. Sensor:
1. Type: Catalytically aided bead, diffusion sampling.
2. Diffusion Head:
a. Four element bridge with one catalyzed bead for sensing gas and one uncatalyzed reference bead.
b. Surrounded by sintered stainless steel flame arrester and protected against hydrogen sulfide poisoning.
c. Rated for Class I, Division I, Group C or D use.
3. Calibration: Non-intrusive. Provide all necessary remote calibration tools.
4. Display: Provide continuous local readout in percent LEL units with 3 digit, LED or backlighted LCD.
5. Range: 0-100 percent combustible gas.
6. Signal Output: Isolated 4-20 m ADC.
7. Enclosure: NEMA 7.
8. Mounting: Duct mounted as indicated on the Drawings.
C. Transmitter:
1. Description: Microprocessor based control system capable of accepting gas concentrations transmitted by the sensors.
2. Alarms: Two individually adjustable alarms, programmable to be latching or non-latching.
3. Alarm Contacts:
a. Warning.
b. Alarm.
c. Fault.
d. Rating: 3 Amperes, 120 VAC.
4. Power Requirement: 100 to 132 VAC, 60 Hz, single phase.
5. Enclosure: Wall mounted, NEMA 4X.
6. Display:
a. Concentration Level: 3 digit.
b. Diagnostic messages.
7. Battery Back-up:
a. Provide battery and charging system supplying emergency power to controller and sensor if input voltage drops below 100 VAC.
b. Return battery back-up system to standby upon return of input power and recharge the battery.
c. Battery capacity: 1 hour.
2.03 LIMIT SWITCHES
A. Manufacturers:
1. Allen-Bradley Company, Model 802X.
2. Square D Company, Type C.
3. Substitution: Under provisions of Section 01600.
B. Description: Snap action limit switch in NEMA 4 enclosure.
C. Contacts: Two normally open and two normally closed, silver alloy with 10 ampere, 120 VAC rating.
PART 3 - EXECUTION
3.01 EXAMINATION
A. Verify Conditions:
1. Verify that surface is suitable for metering device installation.
2. Do not install instruments until environment can be maintained within the service conditions required by the manufacturer.
3.02 INSTALLATION
A. Install metering devices in accordance with manufacturer's written instructions.
B. Device Location and Mounting:
1. Readily accessible for operation and maintenance.
2. Between 48 and 60 inches above floor or permanent work platform.
3. Provide unobstructed access and be clear of walkways.
4. Located such that devices are not subject to shock or vibration will impair instrument or operation.
5. Installed using 5/8 inch stainless steel channel on concrete or concrete block walls.
6. Obtain acceptance of the Engineer for all proposed instrument and locations before installation.
C. Electrical Power Connections:
1. Power disconnect switches are required adjacent to each instrument.
2. All electrical components are to operate on 120 VAC, single-phase, 60-hertz supply.
D. Signal Connections: Made on terminal blocks or by locking plug and receptacle assemblies.
E. Signal Wiring:
1. Carried in dedicated conduit or raceway.
2. Individually shielded twisted pairs or triads.
3. Run loops without splices between instruments, terminal boxes, or panels.
4. Run low level analog or pulse frequency signals in metallic conduit separate from each other and from other circuit types.
5. Shields are not acceptable as a signal path.
6. Common ground return conductors for two or more circuits are not acceptable.
F. Tighten accessible connections and mechanical fasteners after placing equipment.
G. Install fuses.
3.03 FIELD QUALITY CONTROL
A. Perform field inspection and testing under provisions of Section 01400.
B. Manufacturer's Field Services: Furnish factory-authorized service representatives to inspect during installation, to assist in adjusting and testing, to supervise initial operation, and to make adjustments as necessary to assure satisfactory operation.
C. Minimum Length of Field Services: 2 trips; 2 days per trip, exclusive of travel time, for combustible gas analyzers and submersible level transmitters.
3.04 ADJUSTING
A. Adjust work under provisions of Section 01700.
B. Calibrate transmitters and receivers to imposed input values representing 0 percent, 10 percent, 90 percent and 100 percent of full scale. Calibrate all process sensing variables and control signals using test which is at least three times more accurate than instruments to be calibrated.
C. Adjust secondary functions such as alarm actuation and pacing during initial calibration. Repeat any adjustments found necessary to complete systems demonstration.
D. Make final adjustments to installed to assure proper operation.
3.05 COMMISSIONING
A. Start-up and commission under provisions of Section 01650.
3.06 DEMONSTRATION
A. Perform systems demonstrations and furnish instructions to Owner's personnel under provisions of Section 01650.
B. Furnish 16 hours of classroom and on-the-job instructions, exclusive of travel time, for metering devices.
C. Perform systems demonstrations for installed to assure proper operation.
END OF SECTION
