Mirion Technologies Hp(0,07) Beta Module Manuale utente

Hp(0,07) Beta Module

User's Guide

Health Physics

Division

Radiation Safety. Perfected.

DOC003284EN-A

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Table of Contents

1- Presentation...........................................................3

2- General...................................................................4

2.1 Compatibility........................................................... 4

2.2 Settings................................................................... 5

2.3 Hp(0,07) Measurement Display .............................. 5

2.4 Hp(0,07) Chirp Doses Increment ............................ 6

2.5 Historical Data Function ......................................... 6

2.6 Handling Recommendations .................................. 6

2.7 Module Management.............................................. 7

3- Alarms ....................................................................8

3.1 Alarm Display and Conguration ........................... 8

3.2 Condence Test...................................................... 8

3.3 Fault Diagnosis and Resolution .............................. 9

4- Module Attachment .............................................10

4.1 Removing the battery cover ................................. 10

4.2 Attaching the Beta Hp(0,07) module .................... 11

4.3 Detaching the Beta Hp(0,07) module ................... 12

5- Manual Calibration & Maintenance ......................13

5.1 Principle................................................................ 13

5.2 Manual Calibration of the Hp(0,07) Gamma Detector

............................................................................... 14

5.3 Manual Calibration of the Hp(0,07) Beta Detector 15

5.4 Maintenance ......................................................... 16

6- Technical Characteristics .....................................17

6.1 Physical Characteristics ....................................... 17

6.2 Electrical Characteristics ...................................... 18

6.3 Mechanical Characteristics .................................. 18

6.4 Environmental Characteristics.............................. 18

6.5 Factory Calibration and verication...................... 19

6.6 Functional Characteristics .................................... 19

6.7 Environmental Regulations ................................... 19

6.8 Calibration Reference Points ................................ 20

7- Verication Certicate ..........................................21

7.1 Beta Hp(0,07) Verication Certicate.................... 21

7.2 Gamma Hp(10), Hp(0,07) Verication Certicate.. 22

8- CE Certicate.......................................................23

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Module Serial

Number

Beta/Gamma

Detector

Attachment

screws

Connection Pads

Wearing and Battery

Guidelines

Technical Information

Module Serial

Number

Gamma Detector

1- Presentation

The Hp(0,07) Beta Module is mounted on a DMC 3000 to expand the DMC 3000’s measurement capabilities to beta radiation,

and turn on the Hp(0,07) Gamma + Beta measurement.

This user’s guide is to be used along with the DMC 3000 user guide (n°151153EN).

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2.1 Compatibility

2- General

For the Hp(0,07) Beta Module to work correctly, it must be paired with a DMC 3000 using rmware V07.1.0 or greater.

If the dosimeter displays a star at the bottom of its screen, rmware version is earlier than V07.1.0 and is not suitable.

Otherwise, check rmware version by pressing the "+" button to display rmware version.

If rmware version is not visible, use DMCUser.

Please contact Mirion Technologies for compatibility diagnosis and information.

The DMC 3000 must be congured to accept the Hp(0,07) Beta Module (congurable in the Parameters tab of DMCUser,

see §2.7).

The DMC 3000 must be calibrated Hp(0,07) Gamma (check verication certicate of the dosimeter, see §7).

The DMC 3000 must be equipped with the 26-pin connector (PN: 00153458) prior to

the attachment of the Hp(0,07) Beta Module.

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2.2 Settings

The Hp(0,07)Beta Module itself contains all the proper functional settings and calibration parameters.

These parameters are saved in the module on non-volatile memory.

2.3 Hp(0,07) Measurement Display

In the standard conguration for the DMC 3000, display of the Hp(0,07) Gamma + Beta measurements are automatic after

connection of the module.

Examples of available data Display

Hp(10) Gamma Dose

Hp(10) Gamma Dose Rate

Hp(0,07) Shallow Dose

Hp(0,07) Dose Rate

Connected Module

Blue LED for Hp(0,07)

dose increments

Identification of Hp(0,07)

shallow measurement

General

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2.4 Hp(0,07) Chirp Doses Increment

The blue LED ash provides notication of Hp(0,07) dose increments.

Dose increments can be selected from the value in the table beside.

An audible beep can be congured to chirp for the following three (3) options:

Hp(10) Gamma Dose.

Hp(0,07) Shallow Dose.

Hp(0,07) Shallow Dose when the Hp(0,07) Beta Module is connected and Hp(10)

Gamma Dose when it is not.

When the audible beep is congured for Hp(10), dosimeter use Hp(10) Gamma dose

increments dened in the dosimeter.

If the audible beep is congured for Hp(0,07), dosimeter use Hp(0,07) Beta Module audible

beep dose increments.

This dose increment can be selected from the values in the table beside.

All those congurations are done using DMCUser.

2.5 Historical Data Function

Hp(0,07) measurements and events are automatically stored in the DMC 3000 histograms

along with the Gamma Hp(10) measurements and events.

General

One audible beep per...

100 µSv

50 µSv

10 µSv

5 µSv

1 µSv

0.5 µSv

0.1 µSv

0.05 µSv

Without beep

One blue LED ﬂash per...

100 µSv

50 µSv

10 µSv

5 µSv

1 µSv

Without ash

2.6 Handling Recommendations

The belt clip is strongly discouraged when a module is attached on the dosimeter because the opening gap of the clip is

signicantly reduced.

The use of the front facing clip and dosimeter inside the pocket is forbidden with an Hp(0,07) Beta Module, because no material

must be in front of the Beta detector.

The user must always wear the dosimeter against the body (see the label on the back of the module).

The gamma + beta detection area (i.e., the metallic circle) should not be pierced or otherwise damaged or covered up (e.g.,

labeling).

Avoid having any foreign content, such as dust, dirt, or labeling, between the 26-pin connector board and the module.

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2.7 Module Management

The Module Management Mode is congurable using DMCUser software.

General

None: any physical connection of module is ignored by the dosimeter.

All: DMC 3000 accepts all type of module. When a module is connected, the dosimeter changes automatically its display

conguration and display the Hp(10) neutron or Hp(0,07) shallow dose depending on the type of module.

Hp(0,07) required / Telemetry required / Neutron required: DMC 3000 needs the required module otherwise a default

message "WRG MOd" is displayed or "Mod def" if no module is connected.

When a dosimeter is congured in "All" mode and has been

equipped with a module, this command resets the fault message

"Mod def" and returns to operate without any module.

Note: This command resets the secondary dose of the dosimeter.

Note: if the dosimeter is congured in "Neutron required" or

"Hp(0,07) required" mode, this command resets the secondary

dose but it does not modify dosimeter operation.

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3.1 Alarm Display and Configuration

The Hp(0,07) dose and dose rate warnings and alarms are congurable for the entire measurement range of 1 µSv to 10Sv

(0.1 mrem to 1000 rem) and 10 µSv/h to 10 Sv/h (1 mrem/h to 1000 rem/h) for the standard conguration (fast response time)

and from 1 µSv/h to 10 Sv/h (0.1 mrem/h to 1000 rem/h) when congured for optimized responses.

The Hp(0,07) shallow alarm set points are saved in the dosimeter.

When an alarm is triggered, its cause is identied by the blanking of the corresponding measure. Visual and audible alarms

signal are shared with Hp(10) and Hp(0,07) alarms.

3.2 Confidence Test

The detection of beta radiation is ensured through the use of two (2) detectors.

To guarantee a proper operation, two (2) additional tests are performed.

An optical test veries the complete functionality of the measurement chain every ten (10) minutes in Sleep, Pause and Run

mode.

If the number of detected pulses is fewer than the expected number in one of the two (2) channels, the fault message

is displayed. This message lets users know the detection function is not operational.

In addition to the optical test, the module’s counting functionality is veried. If the time between two (2) pulses is longer than

statistically expected, the fault message is displayed.

3- Alarms

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3.3 Fault Diagnosis and Resolution

When connecting a module, the lack of icon on the display means that the module has not been detected (see §2.1 and 2.7

for compatibility and conguration).

Major Faults : a major fault prevents the dosimeter from going into Run mode

Display Causes Solutions

The module was disconnected from the DMC 3000

without rst affecting the disconnection via DMCUser.

It is possible that the dosimeter’s rmware version

does not support the module.

Turn in Pause mode the dosimeter. Verify the connection of the module and

the integrity of the connector. Verify that rmware version of the dosimeter

is V07.1.0 or newer. Reconnect the module while the DMC 3000 is in Pause

mode. If problem persists, contact your Mirion representative.

The DMC 3000 is not calibrated to Hp(0,07) measure. Contact your Mirion representative.

The dosimeter does not recognize the module. Change the DMC 3000 conguration to accept the Beta Module using DMCU-

ser. See §2.1 and §2.7.

Physical problem related to the module’s detection

circuit (not communicating with the microprocessor).

Turn in Pause mode the dosimeter. Disconnect the module.

Check the cleanliness of the module contact surface

Verify the integrity of the 26 pins connector (all the contacts at the same level).

Reconnect the module while Dosimeter in Pause.

If problem persists, contact your Mirion representative.

Physical problem related to the module’s detection

circuit and its detectors (no pulse detected during the

previous verication period).

Verify the functionality in the presence of radiation.

If problem persists, contact your Mirion representative.

Physical problem related to the module’s detection

circuit and its detectors (optical verication).

Contact your Mirion representative.

Physical problem related to the module’s detection

circuit (no measurement time).

Contact your Mirion representative

Limits to the pulse count due to too many mechani-

cal shocks or electromagnetic disturbances to the

module’s detection circuit.

Conrm the default occurred during “normal” use (without any mechanical

stresses or elevated electromagnetic activity).

Contact your Mirion representative.

Minor Faults

Display Causes Solutions

The module’s calibration date has passed. Have the module calibrated.

Alarmes

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4- Module Attachment

Note:

Due to the presence of voltage on the pins of the 26-pin connector, remove or add new modules when the dosimeter

is in Pause mode. Avoid shorting the pins.

4.1 Removing the battery cover

Make sure that the dosimeter is in Pause mode.

Unscrew the two screws (2) with the screwdriver provided with your DMC 3000 (1).

Rotate the battery cover (3).

Remove the battery cover (4).

(1)

(3)

(4)

(2)

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