Last Updated: 04/24/2025 1:44 AM
The following table lists all the components that make up the document.
Replace the Sonalert module on a pedestrian radiation portal monitor (RPM).
Prior to arrival, notify operators concerning expected work, duration, and anticipated alarms and fault indications.
8468 - 1401 - Establish Initial Conditions; Remark:
1401 - Establish Initial Conditions
Establish Initial Conditions
8489 - 1401 - Establish Initial Conditions; Remark:
7265 - Warning : Traffic should temporarily be rerouted or halted during this procedure to ens...
Traffic should temporarily be rerouted or halted during this procedure to ensure safety and prevent unscreened vehicles from passing.
1401 - Establish Initial Conditions
Establish Initial Conditions
8490 - 7592 - Inform system operators; Remark:
7592 - Inform system operators
Inform system operators
8221 - 7676 - Brief system operators on expected work, duration, anticipated alarms, and fa...; Remark:
7676 - Brief system operators on expected work, duration, anticipated alarms, and fa...
Brief system operators on expected work, duration, anticipated alarms, and fault indications before starting work
8492 - 8469 - Uninstall Faulty Sonalert Module; Remark:
8469 - Uninstall Faulty Sonalert Module
Uninstall Faulty Sonalert Module
8494 - 8472 - Isolate faulty neutron Sonalert module; Remark:8473
8475 - Note : Sonalert modules produce an audio alert during a Power On Self-Test (POST). P...
Sonalert modules produce an audio alert during a Power On Self-Test (POST). Placing a hand over each module seperately during POST may help to isolate the faulty component.
8472 - Isolate faulty neutron Sonalert module
Isolate faulty neutron Sonalert module
8473 - The Sonalert below the blue LED is for neutron alarms. It em...
The Sonalert below the blue LED is for neutron alarms. It emits a pulsing alarm.

8493 - 8470 - Isolate faulty gamma Sonalert module; Remark:8471
8475 - Note : Sonalert modules produce an audio alert during a Power On Self-Test (POST). P...
Sonalert modules produce an audio alert during a Power On Self-Test (POST). Placing a hand over each module seperately during POST may help to isolate the faulty component.
8470 - Isolate faulty gamma Sonalert module
Isolate faulty gamma Sonalert module
8471 - The Sonalert below the red LED is for gamma alarms. It emits...
The Sonalert below the red LED is for gamma alarms. It emits a constant pitch alarm.

8495 - 8476 - Disconnect wiring from faulty Sonalert module; Remark:8477
7352 - Note : It is good practice to verify all cables and connectors are labeled prior to ...
It is good practice to verify all cables and connectors are labeled prior to disconnection.
8476 - Disconnect wiring from faulty Sonalert module
Disconnect wiring from faulty Sonalert module
8477 - Neutron Sonalert Module
Neutron Sonalert Module

9174 - Gamma Sonalert Module
Gamma Sonalert Module

8496 - 8478 - Unscrew mounting ring; Remark:8479
8478 - Unscrew mounting ring
Unscrew mounting ring
8479 - Rotate threaded ring counter-clockwise. It may be necessary to use an adjusta...
Rotate threaded ring counter-clockwise. It may be necessary to use an adjustable wrench while holding Sonalert from the back.

8497 - 8480 - Remove faulty Sonalert module; Remark:
8480 - Remove faulty Sonalert module
Remove faulty Sonalert module
3397 - 3395 - Label faulty component; Remark:3396
3395 - Label faulty component
Label faulty component
3396 - Use tag or tape. Include date of removal, description of failure symptoms, co...
Use tag or tape. Include date of removal, description of failure symptoms, country, site, and lane number. Dispose per Nuclear Smuggling Detection and Deterrence (NSDD) guidance or contractual requirements.
8499 - 8481 - Install New Sonalert Module; Remark:
8481 - Install New Sonalert Module
Install New Sonalert Module
8500 - 8482 - Mount new Sonalert module; Remark:8483
8482 - Mount new Sonalert module
Mount new Sonalert module
8483 - Place Sonalert module through hole in door and install the threaded ring.&nbs...
Place Sonalert module through hole in door and install the threaded ring.
8501 - 8484 - Connect wires to Sonalert module; Remark:9176
7263 - Caution : Correct placement of connectors and wiring is critical to proper operation.
Correct placement of connectors and wiring is critical to proper operation.
8484 - Connect wires to Sonalert module
Connect wires to Sonalert module
9176 - Neutron alarm Sonalert connections: Positive termi...
Neutron alarm Sonalert connections:
Positive terminal (+): Two (2) red wires
Negative terminal (P): One (1) blue wire and one (1) black wire

9175 - Gamma alarm Sonalert connections: Positive termina...
Gamma alarm Sonalert connections:
Positive terminal (+): Two (2) red wires
Negative terminal (S): One (1) brown wire and one (1) black wire

7279 - 7249 - Return equipment to normal operating condition; Remark:
7249 - Return equipment to normal operating condition
Return equipment to normal operating condition
8503 - 7250 - Power on RPM; Remark:7251
7250 - Power on RPM
Power on RPM
7251 - Move LD-260 switch to ON position. The LED PWR ON
Move LD-260 switch to ON position. The LED PWR ON will illuminate.

8504 - 8486 - Verify operation of new Sonalert; Remark:8487
8486 - Verify operation of new Sonalert
Verify operation of new Sonalert
8487 - Both neutron and gamma Sonalert modules produce an audio alert during Power O...
Both neutron and gamma Sonalert modules produce an audio alert during Power On Self-Test (POST). During POST, place a hand over the Sonalert module that was not replaced to determine if the new Sonalert is working correctly.
8506 - 7254 - Confirm network connection; Remark:7255
7254 - Confirm network connection
Confirm network connection
7255 - Contact operators to confirm communications have been reestablished between RPM ...
8507 - 7256 - Close and lock all RPM doors; Remark:
7256 - Close and lock all RPM doors
Close and lock all RPM doors
7842 - 7820 - Inform system operators upon completion of maintenance action; Remark:
7820 - Inform system operators upon completion of maintenance action
Inform system operators upon completion of maintenance action
322 - 321 - Document maintenance actions; Remark:
321 - Document maintenance actions
Document maintenance actions
2869 - 2585 - Document maintenance performed; Remark:2866
2585 - Document maintenance performed
Document maintenance performed
2866 - Record observations, times, and results for the maintenance report.
Record observations, times, and results for the maintenance report.
4706 - 4705 - Submit report; Remark:4864
4705 - Submit report
Submit report
4864 - As specified by management or contractual obligations.
As specified by management or contractual obligations.