Frederick Energy Products FS-PAD Personal Alarm Device User Manual
- June 6, 2024
- Frederick Energy Products
Table of Contents
Frederick Energy Products FS-PAD Personal Alarm Device
Overview
The Personal Alarm Device, model #1329196-001, is part of a complete iWAREHOUSE Field Sense System. This device built by Frederick Energy Products provides warnings to both individuals and to vehicle operators to alert them that the individual has entered too close to an operating piece of equipment and is in a dangerous situation. The Personal Alarm Device is worn by the pedestrian to alert them of impending danger. It comprises two components: the base PAD module and a warning module permanently connected to the base module by an electrical cable.
Theory of Operation
Functions of the Personal Alarm Device are:
- To sense the 73 kHz field generated around a vehicle or piece of machinery equipped with a Magnetic Field Generator.
- To echo a signal back to the Magnetic Field Generator to confirm signal recognition.
- To transmit a 916.48 MHz RF signal to the Magnetic Field Generator.
- Turn on its own alarm when the 73 kHz signal from the Magnetic Field Generator is confirmed.
When a Personal Alarm Device (PAD) is in close proximity of the Magnetic Field Generator, the PAD will detect the 73 kHz magnetic field from the generator and analyze its field strength. When the 73 kHz field strength received by the PAD is above a certain threshold it will indicate that the distance of the Magnetic Field Generator is close enough to the PAD to signify a Warning or Danger condition. The PAD is calibrated to differentiate the magnetic field into two zones: Warning and Danger. The PAD will echo back to the Magnetic Field Generator with a 916.48 MHz transmission to confirm the signal recognition and then send the alert to the Magnetic Field Generator. The Magnetic Field Generator has its 916.48 MHz receiver ON when it is transmitting the 73 kHz field and is “listening” to receive any 916.48 MHz transmissions from a pedestrian with a PAD to indicate the individual is too close to the vehicle and warrants a warning or danger condition. When an alert condition has been confirmed between the PAD and Magnetic Field Generator, the PAD will activate its own alarm. The signal in the Warning Zone will activate an LED light a sounder as a continuing series of 3 rapid flashes/beeps followed by an OFF period every three seconds. If the pedestrian is in the Danger Zone, the alarm will change to a continuing pattern of alternating ON/OFF flashes/beeps (0.5 sec ON and 0.5 sec OFF).
Frequency of Operation
The Personal Alarm Device will receive on a frequency of 73 kHz and transmit
on a frequency of 916.48 MHz. www.hitnot.com
FCC/IC Information
The FCC ID for the Personal Alarm Device is QUI-FS-PAD. This device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions:
- This device may not cause harmful interference.
- This device must accept any interference received including interference that may cause undesired operation.
Any intentional or unintentional changes or modifications to the configuration
of the Personal Alarm Device, not expressly approved by Frederick Energy
Products LLC, could void the user’s authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is not guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more
of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
The required notices are specified in the RSS documents (including RSS-Gen)
applicable to the equipment model. These notices are required to be shown in a
conspicuous location in the user manual for the equipment, or to be displayed
on the equipment model. If more than one notice is required, the equipment
model(s) to which each notice pertains should be identified. Suppliers of
radio apparatus shall provide notices and user information in both English and
French.
This device complies with Industry Canada license-exempt RSS-standards(s).
Operation is subject to the following two conditions:
- this device may not cause interference, and
- this device must accept any interference, including interference that may cause undesired operation of the device.
Operation
Installation Information
The Personal Alarm Device (PAD) is a two-part device that includes a Warning
Module permanently connected to a Base Module via a flexible electronic cable.
The Warning Module has a metal clip that allows the user to clip the Warning
Module to clothing or safety vest near the chest where the user can better
hear the audible alert and see the LED light. The preferred way to wear a PAD
is on a Safety Vest. THE PAD IS POWERED AT ALL TIMES EXCEPT WHEN ITS BATTERY
IS BEING CHARGED.
Inoperability Warning
When a PAD battery voltage drops to approximately 3.5 Vdc or below while connected to a PAD, the PAD will signal a low battery condition. This alert is two rapid beeps of the sounder every 1.6 seconds. When the PAD determines the battery to have low voltage, the PAD will cease to give zone warnings and will give only a low battery alert. CAUTION: WHEN A LOW BATTERY IS SIGNALED, THAT PAD SHOULD NOT BE USED UNTIL ITS BATTERY IS RECHARGED.
Charging
The 3.7V Li-ion PAD battery is charged from a special charging cable provided
with each PAD. The special charging cable has a USB male connector on one end
and a plug on the other end that magnetically attaches to the PAD. The
charging cable provided with each PAD includes a 100-240 Vac Wall Charger. The
Wall Adapter provides an output current of 0.1 A at a voltage of 5 Vdc. A LED
light on the PAD displays a solid red light while the battery is charging and
changes to solid green when the battery is fully charged. When the charging
cable is disconnected, the sounder on the PAD will activate for approx. 2
seconds to indicate it is in proper working order.
The PAD should to be charged daily and connected to the charger over weekends
and holidays
Alerts
The Personal Alarm Device is to be worn on the chest of the pedestrian. The
PAD has an LED visual indicator and an 85 dBA sounder to alert the user. If
the battery voltage in the PAD drops to approximately 3.5 Vdc the PAD will
signal a low battery condition with two rapid beeps every 1.6 seconds. NOTE:
THE PAD WILL CEASE TO GIVE WARNINGS TO THE WEARER WHILE SENDING THE LOW
BATTERY ALERT.
Maintenance
The Lithium Ion Battery in the Personal Alarm Device has a finite life and
eventually will need replacement. Battery life is based on the number of times
recharged. There are no published data about the exact number of charges the
battery can undergo before its life is over, but literature suggests it’s at
least 300 charges. Batteries in the PAD are designed to be replaced by the
user. Only use an approved, protected Lithium Ion replacement battery. Contact
FEP for the approved replacement battery list.
A daily check to verify the PAD is functioning visually and audibly is
advised. Any PAD can be shown to be working properly by an approaching truck
with a generator and verify that a warning is given at the expected distance.
Adjustments
Factory settings of the Personal Alarm Device are expected to be stable and
change very little with time. Adjustment capability of the PAD by the user is
not available for field use.
interferences
There are instances when the magnetic field generated from other sources such
as an electrical panel, motorized machinery, large conductor cables etc. can
generate intermittent alarm signals that are picked up by the Personal Alarm
Device. The PAD is designed to be fairly sensitive to pick up the energy from
the Magnetic Field Generator though it is also fairly selective. This
sensitivity can cause the PAD to be triggered by some sources that are
producing a strong magnetic frequency (that happen to fall within our
guidelines) if the PAD is very close to the sources usually within a few
inches.
If a user stands against a wall near a vehicle path, it is advisable that they
do so with the PAD sticking furthest away from the wall as the wall may have
interference sources such as high current cables or power panels etc. that may
silence the PAD.
PAD Specifications
- Part Number: 1329196-001
- Size: 3.58” x 2.35” x 1.14” / 91mm x 60mm x 29mm
- Weight: 7oz./ 198g
- Input Voltage: 3.5 to 4.2 VDC
- Magnetic Field Frequency: none
- Receiver Frequency: 73 kHz signal
- Transmitter Frequency: 916.48 MHz
- Transmitter Power: 0.001W (typical)
- PAD Battery: 3.7 VDC Lithium Ion
- PAD Battery Capacity: 900 mAh
- Charging Specifications: 0.75A at 5V max
- Only use Lithium Ion Battery Charger
- Operating Temperature Range: -30°C to + 70°C ; -22°F to 158°F
- Environmental Considerations: 85 dBa minimum
- Shipping Considerations: Contains a Lithium Ion Battery (packed in equipment)
Revision History
Version 1.0 – March 5, 2020
Original Release. No revision history.