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Tehama System Installation Guide

General Description

The Tehama AMR system consists of three device types to remotely monitor various

environmental and utility readings and provide the data to a central database or PC for formal

presentation and reporting. MDT/Sensor devices will be placed in all locations requiring local

monitoring of data. The MDT/Sensors will transmit time stamped data to the DCAP device,

which receives the data and stores it in a Database. The database information is available over

Ethernet on the local LAN or the Internet. For MDT/Sensors that are out of range from the

DCAP, Repeater devices are added in appropriate locations to relay the data between MDT/

Sensors and the DCAP

The system operates in the 915Mhz ISM bands using off-the-shelf FSK RFIC radios. The system

operates as a Frequency Hopper over 60 narrow band frequency channels, incorporating a

bidirectional communication link with Acknowledge (ACK) messages to ensure all data reaches

the DCAP. The MDT/Sensors are battery operated, bursting data packets at pre-programmed

times then shutting down to conserve battery life, estimated to exceed 5 years. The DCAP and

Repeater units are line powered.

With an typical MDT/Sensor transmission rate of four per hour for time of use applications, a

single DCAP can accommodate many hundreds of MDT/Sensors. Through the use ACK

messages and local memory in both the MDT/Sensors and Repeaters, the number of MDT/

Sensors supported can exceed a thousand. There is no limit to the number of repeaters,

though an average installation may require one Repeater for every 20-30 MDT/Sensors.

Figure 1: Typical System

Tehama Installation Guide! 1 of 5

Summary of content (5 pages)

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Tehama System Installation Guide General Description The Tehama AMR system consists of three device types to remotely monitor various environmental and utility readings and provide the data to a central database or PC for formal presentation and reporting. MDT/Sensor devices will be placed in all locations requiring local monitoring of data. The MDT/Sensors will transmit time stamped data to the DCAP device, which receives the data and stores it in a Database.
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A system consists of two or three types of hardware, and a software program: • • • • One DCAP Unit or Access Point A variable number of Sensors units, each with 2 AA batteries A variable number of Repeater units (optional, depending on size of installation) with external DC power supply. Tehama Configuration Utility (CIT) running on a PC Warning NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT.
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• • Click on the “Create a Site Entry” button to auto-fill a Site entry with the information from this panel. Unplug the USB cable. It is not needed again unless you need to change the IP address or the database passwords at a future time. MDT/Sensor Configuration All MDT/Sensors come from the factory with a default factory-set configuration. The following parameters can be custom configured at the factory . There are no parameters which can be configured on the DCAP or Receiver.
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first, then rapidly flash when a Beacon is seen (from a Repeater or DCAP/AP), then finally illuminates for 10 seconds when it successfully communicates with the network. The unit can be turned off by again holding the button until the LED blips off. Then release the button and the unit will flash twice to indicate it is in the off state. Button Usage (for MDT/Sensor and Repeater) When a unit is off, press and hold for three or four seconds to turn on.
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Notes Contact us: Tehama Wireless 654A Natoma Street San Francisco, CA 94103 415.495.7344 info@TehamaWireless.com www.TehamaWireless.com Tehama Installation Guide! ©2012 Tehama Wireless Design Group Rev.