Johnson Matthey TRACERCO T401 User Manual Download Page 16 | Manualshive

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Johnson Matthey TRACERCO T401 User Manual Download Page 16

5.11.2 Setting the Alarm Trip Level

The following flow chart identifies the process for setting an alarm trip level in

cps

and

Bq / cm

2

mode.

Symbol

Sounder

Alarm

Off

Off

Off

Continuous

On

Off

Short Flash

Off

On

Long Flash

On

On

It should be noted that the Bq / cm

2

alarm will only be operative when the monitor is being

used with the Bq / cm

2

mode selected on the digital scale. Since only a single value trip setting

can be entered in Bq / cm

2

, the operator must ensure that the selected value is consistent with

the type of radionuclide being monitored.

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Summary of Contents for TRACERCO T401

Page 1: ...TRACERCO T401 Contamination Monitor USER MANUAL ...

Page 2: ...d faith but it is for the User to satisfy itself of the suitability of the Product for its own particular purpose Johnson Matthey plc JM accepts no liability for loss or damage other than that arising from death or personal injury caused by JM s negligence or by a defective Product if proved resulting from reliance on this information Freedom under Patent Copyright and Designs cannot be assumed Co...

Page 3: ... Peak Display 10 5 5 Mode Select 10 5 6 Nuclide Calibration Selection 11 5 7 Carry Out a Background Count 11 5 8 Carry Out a Nuclide Measurement 12 5 9 Nuclide Options 13 5 10 Operational Ranges 14 5 10 1 T401 Functional Diagram 14 5 11 Setting Alarm Trip Levels 15 5 11 1 Sounder Options 15 5 11 2 Setting the Alarm Trip Level 16 6 Detector Probe 17 6 1 Probe Retained in Monitor Yoke 17 6 2 Remote ...

Page 4: ...l Specification 20 9 Monitor Response 21 9 1 Affects of Gamma Radiation 21 10 Hints for Radiation Contamination Monitoring 22 11 Health and Safety 23 11 1 Training 23 11 2 Battery life 23 11 3 Probe 23 11 4 Radiation reading 23 11 5 Alpha radiation 23 Revision History 25 ...

Page 5: ...ve environmental conditions particularly those which relate to the Chemical Mining Nuclear and Oil and Gas Industries The Tracerco T401 has been designed to address many of these practical issues in providing a monitor which is reliable versatile easy to use and capable of operating in adverse environmental conditions A key feature of the Tracerco T401 is the capability to allow pre programming of...

Page 6: ...duces to about 4 hours When the residual charge is exhausted the screen clears A selectable backlight facility allows measurements to be made under dark or low light conditions Note that the extended use of this function will significantly reduce battery life An audible response is also available to complement visual measurements In the event of a GM tube failure or circuit malfunction which inter...

Page 7: ...cial transport and storage case All monitors should reach the customer in perfect working order In the unlikely occurrence of a problem please contact Tracerco immediately contact numbers are provided within this manual PLEASE ENSURE THAT THE MONITOR RADIATION TEST AND CALIBRATION CERTIFICATE IS PRESENT IN THE PACK Certificates should be filed in a safe place for future reference In the event of d...

Page 8: ...ht The monitor display is fitted with a backlight which is available for use in situations of low ambient light intensity The GREY switch with the sunburst symbol is pressed to activate the backlight facility Since the backlight significantly increases the current drain on the battery the pushbutton switch is designed for contact operation only ie depressing the switch activates the backlight and ...

Page 9: ...The flexible cable allows remote operation up to 1 5 metres from the body of the monitor Probe and yoke are removed from the body of the monitor and attached to the extendable arm purchased option The orientation of the probe is adjustable relative to the extension arm to provide maximum flexibility when monitoring Further information on these monitoring options is provided in section 6 describing...

Page 10: ...n until the source of radiation is removed 5 3 Digital Numeric Display There is a 5 digit digital display For radiation levels below 100cps or 100 Bq cm 2 the monitor will give a reading to 2 decimal places The maximum indication is 4000 cps or its equivalent in Bq cm2 5 4 Peak Display The meter is capable of numerically indicating the highest radiation level to which the probe has been exposed si...

Page 11: ...iological measurement 5 7 Carry Out a Background Count After switch on press the yellow MODE button to select the background function allow 5 seconds for the display function to normalise The BGnd message will appear on the screen Confirm this choice by pressing the SELECT RESET button The monitor will commence a background radiation count which will continue for a period which based on environmen...

Page 12: ... SELECT RESET will revert the monitor to a cps display Pressing the MODE button will continue the scrolling operation pressing the PEAK button will scroll in opposite direction The unit will display the value of Bq cm2 in real time Pressing the MODE button whilst in Bq cm2 will return the digital display and associated functions to cps mode NB The analogue display will always display live cps irre...

Page 13: ...ionuclides will remain on the screen as 1 to 9 It is recommended that special calibration requirements be discussed with a representative of the Tracerco monitor calibration and repair service Option 1 Americium 241 Option 2 Carbon 14 Option 3 Chlorine 36 Option 4 Lead 210 d Option 5 Lead 210 w Option 6 Radium 226 d Option 7 Radium 226 w Option 8 Strontium 90 Option 9 Cobalt 60 Option 10 Phosphoru...

Page 14: ...5 10 Operational Ranges Bargraph scale 0 1000cps Numeric scale 0 4000cps 5 10 1 T401 Functional Diagram ...

Page 15: ...0 1 0 0 1 1 0 1 0 1 0 10 500 10 Maximum alarm trip level is 500 Bq cm2 5 11 1 Sounder Options One normal press of the speaker button will turn on the sounder which will click in response to radiation In this non alarm mode the speaker symbol will be on continuously A flashing speaker symbol indicates the alarm is set For details refer to page 12 If the speaker symbol is showing an extended repeat ...

Page 16: ... Continuous On Off Short Flash Off On Long Flash On On It should be noted that the Bq cm2 alarm will only be operative when the monitor is being used with the Bq cm2 mode selected on the digital scale Since only a single value trip setting can be entered in Bq cm2 the operator must ensure that the selected value is consistent with the type of radionuclide being monitored ...

Page 17: ...onitor irregular items of equipment or areas difficult to access with a complete monitor The probe and attached yoke may be withdrawn from the body of the monitor by accessing the retaining lever which is located within the lower skid arrangement The lever should be pushed sideways and the yoke withdrawn from the retention assembly The probe is attached to the body of the monitor by a flexible coi...

Page 18: ...nt is clearly identified but is located under the skid which holds the probe and cable This has to be removed 3 screws to access the battery compartment We would recommend replacement battery of the type Duracell MX1 604 Alkaline Manganese or MN1604 Alkaline Manganese The battery cover can be removed by unscrewing the single retaining screw at the base The gasket seal is attached to the inner face...

Page 19: ... the displayed radionuclides using special plaques whose radioactivity content per unit area of surface is traceable to recognised national standards Tracerco will consider modifying the list of calibration nuclides where the operator has a specific requirement and appropriate calibration materials can be sourced Battery replacement will be a standard element of this annual inspection procedure 7 ...

Page 20: ...Less than 2 Humidity range 0 to 95 Ingress protection rating Main case is sealed to IP65 sensor head sealed to IP34 Case material Robust chemical resistant polymers with ABS window Weight 1 kilogram approx Display Bar graph display 0 1000 CPS Digital numeric display in CPS or Bq cm2 Battery Standard 9V PP3 battery Battery life 100 hours typically with background radiation Low battery indication On...

Page 21: ... the physical characteristics of the calibration source will match precisely those of the contaminated surfaces which are under investigation The relative impact that this will have on data interpretation will depend on the nature of the radionuclide being determined These limitations should be borne in mind by operators carrying out any form of radiation contamination monitoring and if there is a...

Page 22: ...st source Alpha particles are heavily attenuated by water Monitoring a wet surface containing alpha emitting radionuclides will dramatically reduce the observed count rate relative to dry conditions In the worst case scenario all alpha particles will be absorbed before being detected by the probe A similar though less pronounced problem may be encountered when measuring nuclides which emit weak be...

Page 23: ... the yoke assembly is securely replaced in the body of the monitor The detector probe should not be placed directly onto surfaces since this may lead to contamination of the face and increase the risk of perforating the GM window Tracerco supply robust transport storage cases which can provide space for a probe extension and spare battery Details are available from www tracerco com monitors 11 4 R...

Page 24: ...chnology Park Billingham TS23 4ED Tel 44 0 01642 375171 Email radiation monitors tracerco com Web www tracerco com monitors TracercoMonitor Website http www tracerco com Local offices http www tracerco com contact us General enquires tracerco tracerco com ...

Page 25: ...om Partington 14 3 12 Kim Thye Lee 7 3 12 A Removed reference to T403 Monitor Updated Logos Typing and formatting amendments Removed calibration date from monitor Removed reference to RSA93 and supplying of sources Removed Polonium 210 from nuclide option Donna Chapman 1 3 17 Rebecca Charlton 2 3 17 Tim Hough 2 3 17 ...

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