Personal and area monitors, Operation – Atec Narda-8800 Series User Manual

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Personal and Area Monitors

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OPERATION

Indoor SMARTS
SMARTS monitors operate like common household

smoke detectors. When operating normally, the alarm

LED will flash approximately every 40 seconds. If the main

battery needs to be replaced, the flash will be accompa-

nied by a “chirp.” When the SMARTS detects radiation at

its preset alarm threshold or higher, a continuous audible

and visual alarm is generated. During this alarm period an

electronic signal is provided at the STATUS jack (J1) to ac-

tivate various user-supplied remote circuitry. If the main

battery drops below critical levels, or if the detection ele-

ments should fail, the system will remain in the alarm

mode until the problem is corrected. If the main battery

should fail completely there will still be a voltage at the J1

produced by a backup battery circuit.
Operation can be verified at any time by depressing the

TEST button which activates a full system test. In situa-

tions where standard operating procedure produces RF

or microwave power in excess of the threshold and expo-

sure to people is possible (e.g., in an anechoic chamber or

on the deck of a ship), the Model 8808 Personnel Sensor

can be used. This sensor will disable the SMARTS alarm

(via the J2 ENABLE jack) unless personnel and high

power radiation are both present.

Outdoor SMARTS
Since standard visual and audio signals would be masked

by the weatherproof enclosure, outdoor SMARTS models

supply information to a remote location via a weather-

proof, multi-pin, MIL-type connector (J101). Normal or

alarm STATUS information is continuously available at this

remote location. Also operated by remote control are the

ENABLE jack (J2) and the TEST function. Outdoor

SMARTS models operate from an external low voltage,

very low current supply brought in through the same con-

nector. This separate DC source allows operation over a

broader temperature range.
The comprehensive SMARTS family of area monitors

should be part of every safety program involved with high

power RF or microwave energy. Other options or configu-

rations, such as different alarm thresholds or calibration

frequencies, can be provided. Consult the factory for details.

T.O.C.