Minneapolis Public Schools



SECTION 27 53 13WIRELESS MASTER CLOCK SYSTEM- GENERALSUMMARYSection Includes: Work includes the installation of a complete and fully operational master clock system with an Internet based wired/wireless clock system.REGULATORY REQUIREMENTSGeneral Requirements:This system shall comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules.System shall be installed in compliance with local and state authorities having jurisdiction.SUBMITTALSShop Drawings:Six sets of complete Shop Drawings shall be submitted.Each Shop Drawing shall include the following:Title sheet clearly defining the project, date of submittal, Contractor, and plete material list listing quantity, manufacturer, model number, and description of all materials.System one-line diagrams.Manufacturer’s specification sheets for all equipment.Poorly made reproductions shall be returned for resubmittal.Contractor shall review all Shop Drawings to ensure they are complete and in conformance to these Specifications. The following steps are required:Determine and verify materials and related construction criteria.Check and coordinate Shop Drawing information with requirements of the work of other trades and Contract Documents.Review, correct, and apply Contractor’s approval stamp with signature.Prepare and attach a Letter of Transmittal.Technology Designer will review Shop Drawings and return 4 sets as follows:Shop Drawings marked with instructions for correction shall be resubmitted as instructed on stamp markings.Forward 1 copy to Minneapolis Public Schools for their review.Shop Drawings which are marked “Rejected” shall be reprinted and reformatted in approved format and resubmitted as specified.Equipment shall not be released for delivery until Shop Drawings have been checked and approved.Approval Stamp: General design and layout is the only approval implied by the approval stamp. Anything called for in Specifications and not noted on Shop Drawings is to be complied with and the approval stamp on Shop Drawings does not relieve Contractor of responsibility for errors or omissions in Shop Drawings.MASTER/SECONDARY CLOCK DESCRIPTIONDescription:Work includes installation and programming of the master/secondary clock system.New secondary clocks shall be provided as shown and noted on the Drawings.New secondary clocks are wireless and battery powered.Clocks located at existing 120 volt clock locations shall have all the 120 volt wire removed.All 120 volt clock wiring and bells inside and outside including wire to be removed.All accessible clock conduit shall be removed.Existing master clock controller shall be removed completely, including electronics, enclosures, relays, cables, etc. Wall shall be patched and painted to match the existing wall in a professional manner acceptable to the Owner.Provide batteries for all battery operated clocks as recommended by clock manufacturer.Provide custom wall mounted metal plates to cover the back box of the existing clock. Mount the new clock to the plate at the old clock location.Provide new clock guards with hinged covers for clock replacement for all clocks as noted on Drawings.The clock system shall include a master clock/transmitter and radio controlled secondary clocks. The wireless clock system shall continually synchronize clocks throughout the facility and shall be capable of clock readouts in multiple time zones where desired.The system shall synchronize all clocks to each other. The system shall utilize Internet technology to provide referenced time. The system shall not require hard wiring of clocks for correction. Clocks shall automatically adjust for Daylight Savings Time.Analog clocks shall be synchronized to within 10 milliseconds, 6 times per day, and the system shall have an internal oscillator that maintains plus or minus one second per day between synchronization, so that clock accuracy shall not exceed plus or minus 0.2 seconds.The system shall include an internal clock reference so that failure of the Internet signal shall not cause the clocks to fail in indicating time.The system shall incorporate a "fail-safe" design so that failure of any component shall not cause failure of the system. Upon restoration of power or repair of failed component, the system shall resume normal operation without the need to reset the system or any component thereof.Battery clocks shall be fully portable, capable of being relocated at any time.Provide connection from the school's data network to the system transmitter for Internet access. Provide Category 6 UTP cable to nearest telecommunications room if necessary. Coordinate with District IT staff.Secondary clocks shall be traditional analog type and include the following minimum features:Clocks shall be wall mounted. A combination of 12-inch and 16-inch diameter shall be used:12-inch clocks shall be used in classrooms and other general spaces. Selected areas such as locker rooms, gyms, multi-purpose, lunchrooms shall include a wire guard with a hinged cover for clock replacement.16-inch clocks shall be used where shown on the Drawings. Where noted on the Drawings, clocks shall include a wire guard for protection.Standard wire guards shall be modified to allow access to clock without removing guard from wall. Provide hinged front with latch to keep front closed.The master clock system shall be able to be programmed completely from a web interface that can be accessed through any typical web browser such as Microsoft Internet Explorer or Mozilla FireFox. The interface shall allow the user to program all bell schedules, events, display features, IP settings of the master clock, and any system setting that the master clock has.The master clock shall have the capability to act as a SNTP server that other devices can point to in order to receive the time through SNTP protocol.The master system shall provide the ability to correct virtually all types of existing secondary analog clock formats in order to ensure maximum flexibility. The system shall also allow programming of a user-defined correction format into the system via the front panel or PC software. The system shall support both analog and digital clock correction at the same time. The system shall provide for simultaneous correction of multiple formats thereby allowing the end user to maintain several different types of secondary clocks to ensure flexibility.The master clock system shall provide for up to 250 schedules, 255 pre-programmed schedule changes, and 800 events.The master clock system shall contain relay zones. Relays may be activated based on a time event, external contact, or front panel activation. The relays support up to 255 levels of priority with override control available from the front panel. The system shall provide for the addition of relay zones capable of switching high voltage or high powered audio.The master clock system shall use a battery backed-up real time clock as its base time. The time information shall be stored in a non-volatile EEPROM. In the event of power failure, the system shall provide the ability to automatically correct all secondary clocks and itself upon the restoration of power. The system shall contain a built-in, user replaceable 10-year battery.The master clock system wireless transmitter shall be capable of transmitting data to the wireless analog clocks. The master clock system wireless transmitter shall be capable of receiving a signal from any SNTP time server via the Internet. The master clock system wireless transmitter shall utilize 915-928 MHZ frequency hopping technology. The system shall be capable of automatic transmission of data along 51 alternating frequencies that allows for an enhanced signal even if there is interference in one of the frequencies. The master clock system wireless transmitter shall be capable of acting as a repeater while receiving a signal wired or wirelessly from the main master clock. The master clock system wireless transmitter shall have the option of having a GPS receiver built into the unit for synchronization from the satellites via UTC.The master clock system wireless analog clocks will be either 12-inch or 16-inch diameter with a semi-flush smooth surface ABS case, durable polystyrene dial, side molded polycarbonate, shatterproof crystal, black hour/minute hands and red second hand capable of receiving a signal from multiple clocks. The wireless analog clocks shall receive and transmit with 915-928 MHZ frequency hopping technology. The wireless analog clocks will be capable of transmitting and receiving the time simultaneously without interfering with each other. The wireless analog clocks shall include automatic calibration as well as a diagnostic function that allows the user to view the quality of the signal, the last time the clock received a correction signal, a gearbox test and a comprehensive analysis of the entire clock. The wireless analog clock shall have a maximum correction time of 5 minutes. The wireless analog clock shall be capable of receiving a signal every 2 or 4 hours. Upon receipt of the wireless signal, the wireless analog clock will immediately self-correct. The analog clocks shall be capable of working in 1 of the following options:2 - D cell batteries; the clock receives and transmits time every 2 or 4 hours, as selected by the user.The system shall operate in a license-free frequency range where no license is required.Selected clocks shall be equipped with wire guards to protect the clock. The wire guards shall include a hinged feature that shall allow access to the clock without the necessity of removing the guard from the wall. Modify the manufacturer’s standard guards as required.SYSTEM SOFTWAREGeneral Requirements: Provide system programming software specifically designed by the master clock manufacturer for Minneapolis Public Schools.- PRODUCTSEQUIPMENTGeneral Requirements:Sapling model numbers are used to establish a base level of features and to conform to District standards. Sapling products will be used as the Basis of Design. If American Time products are used, they shall be from the SiteSync IQ wireless system.Approved wireless clock manufacturers shall be:The Sapling Company, Inc. - 1633 Republic Road, Huntingdon Valley, PA 19006 and distributed by Ban-Koe Systems, Inc. to match MPS district standards.American Time - 140 3rd St. S, P.O. Box 707, Dassel, MN 55325Products that have any other manufacturer’s names printed on them are not acceptable even though Sapling or American Time may have manufactured them.Equipment and components furnished shall be of manufacturer's latest model.Depending on clock manufacturer, provide adequate signal coverage for entire building. Provide additional repeaters as necessary for complete coverage. See drawings for location of master clock control rack.System Transmitter:Manufacturer:SaplingModel Number:SRA-3M0-1008-1Quantity:OneSystem Network Repeater:Manufacturer:SaplingModel Number:SMA-1SM-0000-1Quantity:OneSystem SNTP Software:Manufacturer:SaplingModel Number:SMA-000-SERV-0Quantity:OneWeb Interface Software:Manufacturer:SaplingModel Number:SMA-300-WEBI-0Quantity:OneBattery 12-Inch Wall Mount Analog Clock:Manufacturer:SaplingModel Number:SAL-2BS-12R-0 - BlackQuantity:As Shown on Drawings12-Inch Analog Clock Wire Guard:Manufacturer:Sapling or Owner approved equalModel Number:SAG-1200; Modified As SpecifiedQuantity:As Shown on Drawings12-Inch Analog Clock Wire Guard: (Modified As Noted)Manufacturer:Sapling or Owner approved equalModel Number:SAG-1200Quantity:As Shown on Drawings16-Inch Analog Clock Wire Guard:Manufacturer:Sapling or Owner approved equalModel Number:SAG-1500; Modified As SpecifiedQuantity:As Shown on Drawings- EXECUTIONQUALITY ASSURANCEGeneral Requirements:Manufacturers must be regularly engaged in the manufacture of integrated clock systems and ancillary equipment, of types and capacities required. Approved products shall have been in satisfactory use in similar service for not less than 5 years.All items of equipment shall be designed by the manufacturer to function as a complete system and shall be accompanied by the manufacturer's complete service notes and drawings detailing all interconnections.Contractor shall be an established Communications and Electronics Contractor that has had and currently maintains a locally run and operated business for at least 5 years. Contractor shall be a duly authorized distributor of the equipment supplied with full manufacturer's warranty privileges.Contractor shall show satisfactory evidence, upon request, that it maintains a fully equipped service organization capable of furnishing adequate inspection and service to the system. Contractor shall maintain, at place of business, the necessary spare parts in the proper proportion as recommended by the manufacturer to maintain and service the equipment being supplied.Except where specifically noted otherwise, all equipment supplied shall be the standard product of a single manufacturer of known reputation and experience in the industry.Contractor must have a service office within 50 miles of the site.Installer Qualifications: Firms with at least 5 years of successful installation experience with projects utilizing integrated communications systems and equipment similar to that required for this Project.Protection of Equipment: Until final acceptance of work by Owner, Contractor shall protect all materials and equipment from damage.Electronic components stored or installed on-site shall be protected with a minimum polyethylene or equivalent covering, to protect equipment from moisture, plaster, cement, paint, or other work of other trades.Protective coverings shall be further constructed of plywood sheeting or other materials for strength if required by site conditions.If, during shipment or installation, finish of equipment becomes chipped or scratched, Contractor shall touch up or refinish surfaces to match original finish.Means and Methods: Contractor is responsible for means and methods of construction, and for the safety of personnel.INSTALLATIONGeneral Requirements:Provide hanging hardware with fastening system appropriate for the wall material that the clock will be mounted to.All equipment shall be installed in a neat and professional manner.All equipment power and signal wiring shall conform to the National Electrical Code and to applicable state and local codes.Ensure master clock is receiving signal and is indicating correct time.Install batteries and initiate time correction for each clock. Ensure that each clock is operating and is receiving radio signal at the installed location. Clocks installed on steel partition walls shall have 2-inch spacers installed behind them to allow for the reception of correction radio signal.Relocate battery clocks that do not receive signal. Clocks shall be located in a viewable area as approved by Owner.Contractor to provide in-wall bracing support for all devices that are to be wall mounted to walls that are not masonry block walls.SYSTEM TESTS AND PROGRAMMINGGeneral Requirements:All system functions shall be tested for proper performance. All test results shall be documented for inclusion in the As-Built Manuals.Contractor shall provide complete system programming in coordination with the Owner and Architect. The programming shall be done by a person that has received factory training in the programming of the installed system. Any programming not coordinated with the Owner, that does not meet the Owner's wishes, shall be corrected at no charge to the Owner.After approximately 1 year of use by the Owner, Contractor shall revisit with the Owner to see if programming changes to the clock system are desired. Contractor shall provide these changes as necessary at no additional charge. This shall be a onetime change.FINAL INSPECTIONGeneral Requirements: Contractor shall perform final acceptance testing in the presence of Architect's representative and Owner's representative, executing a point by point inspection against a documented test plan that demonstrates compliance with system requirements as designed and specified:Submit documented test plan to the Architect and Owner at least 14 days in advance of acceptance test, inspection, and check-off.Conduct final acceptance tests in presence of the Architect and Owner, verifying that each device point and sequence is operating correctly and properly reporting back to control panel and control center.Acceptance by Architect and Owner is contingent on successful completion of check-off. If check-off is not completed due to additional work required, re-schedule and perform complete check-off until complete in one pass, unless portions of system can be verified as not adversely affected by additional work.System shall not be considered accepted until all acceptance test items have been successfully checked-off. Beneficial use of part or all of the system shall not be considered as acceptance.Contractor shall provide competent personnel familiar with the installation for a final inspection/commissioning of the system with the design Engineer. The final checkout shall use the Specifications as the checklist that all features and equipment have been provided as specified. Contractor's personnel shall be able to demonstrate all features of the system. Provide a minimum of 2 hours for the final checkout.If discrepancies are found that cannot be corrected immediately and a second inspection is required, Contractor shall provide personnel as required until the system is accepted. This shall be done at no additional charge to the Owner.TRAININGGeneral Requirements: Contractor shall provide system operations, administration, and maintenance training by factory trained personnel qualified to instruct:Owner will designate personnel to be trained.Provide printed training materials for each trainee, including product manuals, course outline, workbook or student guides.Provide hands-on training with operational equipment.Training shall be oriented to the specific system being installed under this Contract as designed and specified.All training shall be coordinated through the school principal to ensure that all necessary personnel are in attendance at each training session.The personnel responsible for training shall be trained by the manufacturer of the equipment and be familiar with all of the features of the system. If the Owner is not satisfied with the training they have received from the Contractor, a representative of the manufacturer shall be hired by the Contractor to provide competent training at no additional charge to the Owner.Contractor shall have a sign-up sheet for each training session to keep a record of who received training and when and shall provide a copy of this sign-up sheet to the Owner.Contractor shall video record each of the training sessions for the Owner's future reference. Provide two copies of the training recording to the Owner on CD in Microsoft Windows audio media file format immediately following each training session. If the Contractor fails to make a video recording of a training session, that training session shall be repeated at no expense to the Owner and video recorded at that time. A copy of each training video CD shall be submitted with the as-built documentation for Architect review.All training hours shall be documented in writing and signed by the person receiving the training to ensure that the Owner receives the training hours specified.Provide a minimum of 4 hours of on-site in-service training in the operation of the system. The training may be divided into separate sessions as required by the Owner within the 1-year warranty period. This includes multiple trips to the site as required.AS-BUILT DOCUMENTSGeneral Requirements:Three sets of complete As-Built Documents shall be submitted to Communications Technology Designer by Communications Contractor(s), not Subcontractors.Contractor shall review all As-Built Documents to ensure they are complete and in conformance to these Specifications. The following steps are required:Determine and verify materials and related construction criteria.Check and coordinate with existing Shop Drawing information and changes executed during construction.Prepare and attach a Letter of Transmittal.In addition to 2 paper copies, provide As-Built Documents in electronic format on CD ROMs.Each As-Built Manual shall include, but not limited to:Complete floor plans in 1/8-inch scale showing locations of all remote devices. Drawings shall be clearly legible. Poorly made reproductions are not acceptable.Clear and easy to understand operating instructions written for non-technical system operators.One Line Diagram of System showing all interconnections to other systems.Equipment Installation Details.Copies of programming software that include system configuration settings at time of completion.Technology Designer will review As-Built Documents and return to Owner for their use.END OF SECTION 27 53 13 ................
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