1. Digital Temperature Data Recorders/Loggers · transparent and removable for easy access to the...

Michigan Department of Transportation (MDOT): Request for Bids for Digital Temperature Data Recorders/Loggers and Wireless Digital Temperature Recording Systems

1

1. Digital Temperature Data Recorders/Loggers

MDOT is soliciting bids for temperature recording devices or temperature data loggers. These will be used to record temperature of (lime saturated) water in curing tanks for concrete cylinders (see Photos 1 & 2 below). The dimensions of the storage tanks are approximately 5 Feet long by 3 Feet wide by 2 Feet deep.

Photo 1: Generic view of a Concrete Curing Tank. The concrete cylinders on top will be placed in the tank where they will remain submerged in (lime saturated) water for up to 28 days.

Photo 2: The temperature sensor probes of a temperature data logger can be seen submerged completely in water. This is the preferred way of placement of temperature sensors in the concrete curing tanks.


2

The temperature loggers should, at a minimum, have the following characteristics/capabilities.

1. 2 (external) channels per data logger/recorder with digital display. Accuracy: ± 1.0 deg F; Resolution: 0.1 deg F; Operating Environment: 40 deg F to 100 deg F; Humidity: Regular room humidity with seasonal variation.

2. Operable on both AC and DC. Initial sets of batteries and AC adapters will be included in the bid. 3. External Temperature Sensor Probes:

- (Minimum)Temperature Range: 40 deg F and 100 deg F. - The cables attached to the external sensors should measure 5 feet in length. - The sensors/probes should be able to function while completely submerged as well as

partially submerged in lime-saturated water. The sensors and sensor cable should be resistant to any possible damage from being exposed to water with dissolved lime.

4. The data loggers should have the capability of taking temperature readings, at a minimum, every 15 minutes with enough storage for at least four weeks. The interval between of temperature readings should be programmable. The data logger should be able to notify via sound alarm whenever the upper or lower tolerance limits for the permissible temperature range are exceeded.

5. The data stored on loggers should be transferrable to a personal computer via USB port. The data transfer should not involve having to remove the data loggers from their location of use. This can be achieved by USB, hand held data collector etc. All necessary equipment and installation software needed for such data transfers will be included in the cost of the bid. All data transfer equipment and software will be provided in 10 sets. The accompanying installation software should allow for the capability to perform routine and periodic in-house adjustment/s of the data loggers and sensors to maintain accuracy.

6. Calibration Requirements: All data loggers should be calibrated (3-point) that is traceable to NIST. The supplier should provide calibration certificates for all data loggers and temperature sensors. The supplier should provide separate calibration certificates for each calibrated piece of equipment or combined certificate/s of calibration for multiple quantities of each equipment type with serial numbers, where applicable.

7. Calibration will take into account the length of external sensor cables. 8. Warranty/Technical Support/Maintenance (Parts & Labor): 60 Months. The supplier will provide

technical support and maintenance (including parts & labor) on all data loggers and related appurtenances provided. The cost will be included in the original bid.

9. Each data logger will come with a protective wall-mounted cover. The front of the cover will be transparent and removable for easy access to the digital display of the data logger.

10. A total of 30 data loggers are solicited. 11. A total of 65 temperature sensor probes are solicited. 12. A total of 10 sets of equipment and installation software necessary for operation of data loggers

and for transfer of data from loggers to personal computer via USB; are solicited. 13. Bid will provide total cost as one lump sum amount. Break down of cost will be included in the

bid documents that will also provide technical specifications of all equipment involved.


3

14. All equipment will be supplied to: Robert Larios, MDOT Construction Field Services, Secondary Complex, 8885 Ricks Road, Lansing, MI 48909

2. Wireless Digital Temperature Recording/Logging System:

MDOT is soliciting bids for wireless temperature recording/logging systems. These systems will be installed at two laboratory locations (details provided below) and will be in addition to the temperature data loggers solicited above.

The wireless temperature recording/logging system should, at a minimum, have the following characteristics/capabilities.

1. Accuracy: ± 1.0 deg F; Resolution: 0.1 deg F; Operating Environment: 40 deg F to 100 deg F; Humidity: Regular room humidity with seasonal variation.

2. Operable on both AC and DC. Initial sets of batteries and AC adopters will be included in the bid. 3. Temperature Sensors:

- (Minimum) Temperature Range: 40 deg F to 100 deg F. - The sensors should be resistant to any possible damage from being exposed to water with

dissolved lime. 4. The system should have the capability of taking temperature readings, at a minimum, every 15

minutes with enough storage for at least four weeks. The interval between temperature readings should be programmable.

5. Data from temperature sensors placed in curing tanks should be transmitted wirelessly to a data collector unit. The data stored on data collector should be transmitted wirelessly to a personal computer for storage, monitoring and analysis. All necessary equipment and installation software needed for such data transfers will be included in the cost of the bid. One set of all data transfer equipment and installation software will be provided at each of the two laboratory locations mentioned below. The accompanying installation software should allow for the capability to perform routine and periodic in-house adjustment/s of the system to maintain accuracy.

6. The data collecting unit should come with a protective wall-mounted cover. The front of the cover should be transparent and removable for easy access to the digital display.

7. Calibration Requirements: Data Collectors and temperature sensors should be calibrated (3-point) that is traceable to NIST. The supplier should provide separate calibration certificates for each calibrated piece of equipment or combined certificate/s of calibration for multiple quantities of each equipment type with serial numbers, where applicable.

8. Bid will provide cost as lump sum amount for complete wireless system at each of the two locations mentioned below. Break down of cost will be included in the bid documents that will also provide technical specifications of all equipment involved.


4

9. Vendor will be responsible for installation of the system at the two locations mentioned below. All associated costs shall be included in the bid amount.

10. Warranty/Technical Support/Maintenance (Parts & Labor): 60 Months. The supplier will provide technical support and maintenance (including, but not limited to, parts & labor; and lab visits by supplier’s representative/s when necessary) on the wireless systems and related appurtenances provided. The cost will be included in the bid amount.

Location #1 for Wireless Temperature Data Recording/Logging System:

Address: 35414 Mound Road, Sterling Heights, MI 48310

The room size (Concrete Curing Room) is 50 feet by 74 feet. It will have storage tanks placed throughout the room in multiple rows (see plan below). The temperature of the (lime saturated) water in the storage tanks will be monitored by placing a total of 35 sensors in the tanks and taking 15-minute interval readings. The data from all 35 sensors will be communicated wirelessly to a base collector unit and onto a personal computer for storage, monitoring and analysis. The personal computer is placed in an adjoining room (shown as “Co-Op Office” in the Plan-drawing below). The separating walls are not brick walls. The system should be able to notify whenever the upper or lower tolerance limits for the permissible temperature are exceeded.


5

Plan of Location #1: The Plan shows “Concrete Curing Room” where the Curing Tanks will be placed. It also shows the adjoining “Co-Op Office” where the temperature data from Curing Tanks will be wirelessly collected on computer.


6

Testing Room

Concrete Curing Room

Concrete Testing & Curing Room (Location #1)


7

Location #2 for Wireless Temperature Data Recording/Logging System:

Address: 2800 N Elm Road, Jackson, MI 49201

Room size is 32 feet by 20 feet. It will have storage tanks placed along the periphery of the room in a single row. The temperature of the (lime saturated) water in the storage tanks will be monitored by placing a total of 8 sensors in the tanks and taking 15-minute interval readings. The data from all 8 sensors will be communicated wirelessly to a base collector unit and onto a personal computer for storage, monitoring and analysis. The personal computer is placed in an adjoining room and the separating walls are not brick walls. The system should be able to notify whenever the upper or lower tolerance limits for the permissible temperature are exceeded.

Below is the layout of the laboratory building. The room shown as “Concrete Cylinder Room” is the area that will house the curing tanks (see Pictures below). The concrete cylinder room is roughly 20 feet by 32 feet. The layout also shows the computer location where the temperature data is to be received wirelessly.

Plan of Location #2: The Plan shows “Concrete Cylinder Room” where the Curing Tanks will be placed. It also shows adjoining room with “Computer Location” where the temperature data from Curing Tanks will be wirelessly collected.


8

Concrete Cylinder Room with Curing Tanks (Location #2)

1. Digital Temperature Data Recorders/Loggers · transparent and removable for easy access to the...

Documents

Transcript of 1. Digital Temperature Data Recorders/Loggers · transparent and removable for easy access to the...