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Ludlum Measurements 23, Technical Manual

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MODEL 23 AND 23-1  

ELECTRONIC PERSONAL DOSIMETER 

August 2017 

Summary of Contents for 23

Page 1: ...MODEL 23 AND 23 1 ELECTRONIC PERSONAL DOSIMETER August 2017 ...

Page 2: ...MODEL 23 AND 23 1 ELECTRONIC PERSONAL DOSIMETER August 2017 ...

Page 3: ...ii ...

Page 4: ...n any implied warranty of merchantability or fitness which extend beyond the description of the face there of If the product does not perform as warranted herein purchaser s sole remedy shall be repair or replacement at the option of Ludlum Measurements In no event will Ludlum Measurements be liable for damages lost revenue lost wages or any other incidental or consequential damages arising from t...

Page 5: ...Ludlum Measurements Inc August 2017 ...

Page 6: ...Battery Installation 2 1 Preparing the Instrument for Use 2 3 Operating the Instrument 2 3 Specifications 3 Description of Controls and Functions 4 Parts and Features 4 1 Display 4 2 Alarm 4 4 Safety Considerations 5 Environmental Conditions for Normal Use 5 1 Precautions 5 1 Cleaning Instructions 5 2 Recycling 6 ...

Page 7: ...keV to 3 MeV Dose dose equivalent rate and alarm values are easily seen on the four digit LCD screen Each preset alarm threshold is displayed on the screen When the dose or dose rate reaches the preset alarm thresholds the alarm activates Users who have multiple EPDi units there is an optional reader software kit that can be used to quickly take data directly from the EPDi Dosimeter via infrared c...

Page 8: ...strument must be accompanied by an Instrument Return Form which can be downloaded from the Ludlum website at www ludlums com Find the form by clicking the Support tab and selecting Repair and Calibration from the drop down menu Then choose the appropriate Repair and Calibration division where you will find a link to the form Battery Installation Replace the battery with the following procedure 1 P...

Page 9: ...ity when replacing the battery This product operates on the CR2450 battery 3 0 V only Part 21 8639 Only use the battery specified Note When a low battery indicator appears take readings within one minute before replacing the battery To save battery life the power saving mode should be used Warning Do not throw the dosimeter or batteries into a fire This could result in personal injury ...

Page 10: ...lay side of the Model 23 towards your body and insert the Model 23 into your pocket securing it with the clip as shown below Green LED lamp flashes ALM Batt RED LED lamp flashes Replace the used battery with new one ALM E06 Red LED lamp flashes Contact our representative or agency ALM E11 Red LED lamp flahes Restart the Model 23 by following the procedure Press and hold the power switch for approx...

Page 11: ...h user settable volume and OFF When reaching or exceeding the present values the alarm activates red LED lamp flashes and vibrator activates Alarm Volume approximately 60 dB Sensitivity approximately 2 cpm per µSv h 20cpm mR hr Data Logging 600 records optional IR reader required for data transmission to PC When the Model 23 is turned off the accumulative dose data is automatically deleted Default...

Page 12: ...017 Shock Resistant operates properly after a vertical drop test from 20 cm Power one each coin type lithium battery CR2450 Battery Life typically one month at 8 hours per day in non alarm status Size 12 x 30 x 112 8 mm 0 5 x 1 2 x 4 4 in H x W x D without clip Weight 55 9 g 2 oz ...

Page 13: ...ction4 Ludlum Measurements Inc Page 4 1 August 2017 Description of Controls and Functions Parts and Features Strap Hole LED lamp Selection Buttons Power Switch Buzzer Display Infrared Communication Window Battery Cover Clip Section 4 ...

Page 14: ...lay at the time of abnormal operation See chart on following page for more examples Indicates that the Model 23 is operating in the measurement mode Alarm indications ALM DOSE dose ALM RATE dose rate ALM TIME measurement time ALM BATT battery replacement ALM E06 faulty counting circuit ALM 11 setup error ALM E12 data recrording error ...

Page 15: ...Model23 23 1 TechnicalManual Section4 Ludlum Measurements Inc Page 4 3 August 2017 ...

Page 16: ...times ALM TIME Activates when the operating time exceeds the set time A 1 minute beep then a 1 second beep and a 1 second pause This repeats for the time previously set Red flashes every two seconds ALM E06 Activates when the counting circuit shorts out due to disconnection or condensation A 1 minute beep then a 1 second beep and a 1 second pause This repeats for the time previously set Red flashe...

Page 17: ...r may not measure pulsed radiation accurately Also do not use it as a survey meter Warning To prevent short outs protect exposed terminals with insulating tape prior to disposal Failure to do so may cause excessive heat generation rupturing or combustion leading to personal injury or fire Do not throw the dosimeter or batteries into a fire Do not disassemble the dosimeter Preacautions Do not drop ...

Page 18: ... transceivers or similar devices Microwave ovens Radars Welding machinges Any other spark discharging or high intensity radio wave emitting devices Caution Keep at least 5 cm away from PHS handsets and cell phones Failure to do this may result in false operation Caution Do not force open the clip as it may be damaged Cleaning Instructions The Model 23 Dosimeter may be cleaned externally with a dry...

Page 19: ...different agencies public and private involved in this pursuit it becomes evident that a myriad of methods can be used in the process of recycling Therefore Ludlum Measurements Inc does not suggest one particular method over another but simply desires to inform its consumers of the range of recyclable materials present in its products so that the user will have flexibility in following all local a...

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