Heico STE Radiation Pager Bedienungsanleitung

RADIATION PAGER

USER’S MANUAL

Revision D

01-2023

a HEICO Company

30 South Calle Cesar Chavez, Santa Barbara CA 93103

[email protected]m

9507-(805) 964

Radiation Pager User’s Manual

1OVERVIEW

The Radiation Pager is a compact Personal Radiation Detector (PRD) for use in the interdiction and location

of nuclear materials. It was specifically designed to be used by Customs and Border Protection agents, Law

Enforcement personnel, and First Responders. Employing a large cesium iodide crystal scintillator and a

quality photomultiplier tube for gamma radiation sensing, coupled with electronics that have been tuned

for performance and optimized for low power, the Radiation Pager is a very sensitive device with a fast

response time.Designed to be worn in a belt holster or in a

pocket, the Radiation Pager is the smallest PRD available on

the market today.

When the Radiation Pager detects radiation at levels above the

natural background, it quickly alerts the operator by flashing

a daylight-viewable LED and by either sounding an alarm or

vibrating. The operator can easily locate the radiation source

using the single digit display, the flashing indicator, or the

audible tone.

Designed from the ground up for connectivity, the Radiation

Pager employs the latest Bluetooth standards for encryption

and communication. This capability allows for real-time

streaming of radiological data to mobile device applications

and to centralized command and control networks.

The Radiation Pager is designed to withstand the rigors of

daily operation, and can be worn in an available belt holster,

or carried in a pocket. It will operate continuously for at least

3,500 hours on a single AA Lithium battery.

Table 1: Radiation Pager Specifications

Specification Description

Radiation Type

Gamma

Detector Type

Cesium Iodide Scintillator

Detector Size

5 cc

Sensitivity

2.2 cps per µR/h at Cs-137 (662keV)

Low Energy Cutoff

45keV

Integration Time

Multiple (<1, 2 Seconds)

Size

9.3 cm x 5.6 cm x 2.3 cm

Weight

150g with battery

Battery

1x AA Lithium (Li-FeS2)

Battery Life

3,500 Hours

Environmental Protection

Per ANSI N42.32 2016

Ingress Protection

IP65

Temperature Range

-25º to 50ºC

Indicators

Visible, Audible, Vibration

Compliance

ANSI N42.32 2016

Communications

Bluetooth 5.0

Figure 1: Radiation Pager Detector

Location and Center

Figure 2: Radiation Pager Detector

Location and Center

Radiation Pager User’s Manual

2OPERATION

The user interface of the Radiation Pager consists of a multicolor Indicator LED and a single digit numerical

Level Display. Together, these two indicators show the status of the instrument and communicate the

intensity of any detected gamma radiation (see Figure 2).

Figure 3: Radiation Pager User Interface

The Radiation Pager is activated by a three-position rotary Mode Switch. The middle position turns the

instrument off. By rotating the knob right, the instrument is turned on and enables the audible alarm mode.

Conversely, by rotating the knob left, the instrument is turned on and the silent (vibration) alarm mode is

enabled.

When the Radiation Pager is turned on, the middle segment of the Level Display flashes while a self-test is

conducted. At the successful conclusion of the self-test the outer segments of the Level Display will light

in a clockwise rotation for 30 seconds while the instrument measures the ambient gamma radiation

background. After the background radiation level has been measured, the Radiation Pager calculates and

briefly displays the alarm threshold value.The instrument is now ready for use. The Radiation Pager is

now measuring ambient gamma radiation and will alarm if the detected radiation exceeds the alarm

threshold.

When the Radiation Pager alarms, it flashes the Indicator LED and either vibrates or sounds an audible

tone, depending on the setting of the Mode Switch. The instrument will alarm for 14 seconds unless the

Display Button is pressed to acknowledge the alert.Once the alarm has timed out or been acknowledged,

the device enters a (silent) search mode, as described in the following paragraph. Future alarms will not

occur until radiation levels fall below the preset alarm threshold level.

At any time, the Radiation Pager may be used to search for radioactive material by pressing and holding

the Display Button. Depressing the Display Button causes the Indicator LED to flash at a duty-cycle

proportional to the level of gamma radiation detected. At low radiation levels the Indicator LED will flash

green after every 16 radiation counts. If the detected radiation increases to the point that the alarm threshold

is exceeded, the Indicator LED will flash yellow. If the Mode Switch is set to enable audio, a short tone

will also be emitted each time the Indicator LED flashes. At higher radiation levels the Indicator LED will

appear to stay on continuously. While the Display Button is depressed, the Level Display will also be

activated, and the detected radiation will be represented here numerically.

NOTE:

It is important to not turn on the Radiation Pager in the vicinity of a radiation source. This will affect

the alarm threshold calculation and will reduce the device’s sensitivity.

Radiation Pager User’s Manual

The Level Display provides an indication of the relative intensity of the detected radiation on a scale of

zero through nine. Each number indicates a radiation intensity of roughly twice the previous value (i.e. a

level 4 is about twice the radiation intensity of a level 3).

Table 2 shows the Level Display values and their corresponding exposure rates in micro-Roentgen per hour

(µR/h). Above the exposure rates shown here, the unit will continue to display a 9.

At approximately 6,000 µR/hr. the Indicator LED will be illuminated red, which indicates that the device

is reading gamma radiation above its normal operating range, and that radiation levels may have reached a

level hazardous to the operator.

3MOBILE APPLICATION

The Radiation Pager is equipped with a Bluetooth communication capability allowing the user to connect

with either an iOS (Apple) or Android-based mobile device to:

1. Register alarms for Gamma radiation

2. View exposure and dose equivalent estimates

3. View the historical data collected

4. View live data streaming from the Pager

5. View map location with path trace

6. Download/transfer data files

Bluetooth operation can be used in parallel with the Radiation Pager display.

1Exposure rates listed here are indicative of the average rate represented by level reading shown.

Level Exposure Rate1

µR/h at Cs-137 (662keV)

140

300

600

1,400

3,000

6,000 +

Table 2: Exposure Rate Table

Radiation Pager User’s Manual

The application can be found on the Apple store and Google Play store (Android) – search for Sensor

Technology Engineering

STE

When opening the application, the following notices (or similar) will appear:

Message on Mobile Device

Recommended Action

“STE” would like to send you notifications

Click “Allow”

Allow “STE” to use your location

Click “Allow While Using App”

“STE” would like to use Bluetooth

Click “OK”

This will enable full functionality.

CONNECTION AND USAGE

Open the application and you will see the devices screen (Screen 1). Bright or Dark mode selection is

performed from the hamburger menu shown in Screen 2. Bright Mode and Dark Mode options are shown

in Screen 1 and Screen 4.

Screen1 Screen 2 Screen 3 Screen 4

Radiation Pager User’s Manual

Turn on the Radiation Pager (if already on, turn off for 5 seconds and then on again). In the two-minute

period immediately after the Radiation Pager is turned on, it will be available to connect with the mobile

device. The Radiation Pager Bluetooth module will emit a signal that will be detected by the mobile app.

This signal will terminate after two minutes if a mobile device is not connected with the Radiation Pager.

For EOD (Explosive Ordinance Disposal) units it is often preferred to NOT have Bluetooth signals active

in the environment, so do not connect a mobile device in the first two minutes and the Radiation Pager will

not emit a signal until turned off and on again. Note that only one mobile device can be paired with a

detector at any given time.

Click “Add a Device”. Once the Radiation Pager is “ON” the app will recognize it and will show the device

image and approximate distance from the mobile device. In an environment where there may be more than

one Radiation Pager being activated this allows the user to select the closest device. There may also be

other STE detectors in the area as shown in Screen 5.

Screen 5 Screen 6

Radiation Pager User’s Manual

Once the Radiation Pager is selected the gamma screen will display. Please remember that the Radiation

Pager is still in its warmup mode, performing the background calculation and has yet to calculate the alarm

trip point. This can take up to 30 seconds.

When complete, the display should be similar to Screen 6. The green line is the alarm trip point. The

graph is 2 minutes in duration (waterfall from right to left) updating twice per second. If a radiation source

is brought close, the system will alarm as shown in Screen 7. The user can also select the units desired in

terms of dose equivalent or in CPS (counts per second) – Screen 8.

Screen 7 Screen 8

Radiation Pager User’s Manual

The next menu item is “Dosage” shown in Screen 9. This measures the cumulative dose measured by the

detector during a given period (as measured by the horizontal axis). For higher exposure rates the graph

can be seen to have a steeper gradient as the user experiences more radiation per unit time. This graph will

always continue to read and accumulate dose even from background radiation alone.

Screen 9

Radiation Pager User’s Manual

DATA EXPORT

Click on “Alarms” and you will see Screen 10. This details every alarm “event” that has occurred.

An event is defined as beginning the instant the detector measures radiation above threshold trip

point until the time that it drops below threshold. The resulting dataset will appear as shown on the

screen including, date, start time, end time, detector serial number, maximum exposure rate, exact

location and physical address. Each “event” will be numbered in sequence as shown in the screen

with the most recent event at the top

To export all of the event data, click “Export All Data” and you will see the typical selection of

options as shown in Screen 11. The data is formatted in a CSV file and can be transmitted as

preferred.

Screen 10 Screen 11

Radiation Pager User’s Manual

In the “Settings” menu the user has the ability to delete all the data on the mobile device from a

given detector as shown in Screen 12 and Screen 13.

Screen 12 Screen 13

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