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Mirion Technologies UltraRadiac Plus, Manual

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Mirion Technologies UltraRadiac Plus Manual Download Page 15

THE RATE MODE

To turn the UltraRadiac on, press and hold ON/OFF key until you see the Rate display in Figure 7.

Figure 7 The Rate Display

The Rate Alarms

There are two Rate Alarm Thresholds: Low Rate, for a minor hazard, and High Rate, for a severe hazard.

The alarm indicators will remain enabled as long as you remain in the radiation area that triggered the alarm.

High Threshold

There are several indicators for the High Rate Alarm Threshold (Figure 7).

Visual Enabled - The entire display and the left LED will flash quickly.

Audio Enabled - The audio will beep quickly.

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Summary of Contents for UltraRadiac Plus

Page 1: ...adiac s presettable alarms for both instantaneous Rate and cumulative Dose can alert you to hazardous conditions When an enabled alarm s threshold is exceeded a visual indicator will begin flashing and optionally an LED will blink and or an audible alarm will sound Some units also include a vibrator alarm The Radiation Units Depending on the model your UltraRadiac is factory set to display the Rat...

Page 2: ...s preventive maintenance checks and describes how to install or replace the batteries 2 Basic Functions The first time you take your UltraRadiac TM out of its shipping carton you ll have to install its batteries See The Batteries for instructions POWERING THE UNIT To turn the unit on press ON OFF until 000 is displayed Release ON OFF The instantaneous rate will be displayed with the word RATE at t...

Page 3: ...reshold Clearing the High Rate Alarm Press the CLR TEST key to turn off the vibrator The visual alerts will continue until the rate falls below the High Rate Alarm threshold Clearing the Low Dose Alarm Press the CLR TEST key to turn off the vibrator and the audio alert The visual alerts will continue until the rate falls below the Low Dose Alarm threshold To turn off the visual alerts you ll have ...

Page 4: ...of radiation CHECKING THE ACCUMULATED DOSE Press DOSE to see the accumulated dose the word DOSE is at at the top right of the screen To return to the Rate Mode press the RATE key CLEARING THE ACCUMULATED DOSE Press and hold DOSE CLR TEST The display will flash for a few seconds then clear the accumulated dose To return to the Rate Mode press the RATE key READING THE ALARM THRESHOLDS Press ALARM RA...

Page 5: ...lected H or L indicators Repeatedly press the ALARM key until you see the desired combination of indicators AUDio VISual vibrator or no indicators The unit will automatically return to the main display about 10 seconds after the last keypress USING THE BACKLIGHT In dim light you can enable the unit s backlight to read the display Press the LIGHT key The display s backlight will turn on To conserve...

Page 6: ... Up the Unit On Off Press and hold to turn the unit on or off Rate Press to change to the Rate Mode Dose Press to change to the Dose Mode Alarm Press to see the Stay Time the number of minutes you can safely stay in the area at the current Dose Rate If the Dose Rate goes up your remaining Stay Time will go down file C Documents and Settings Buzz Desktop radstuff Dosimeters ch 6 of 33 4 11 2014 6 1...

Page 7: ... unit s next use If a blinking BAT is seen in the top left corner of the display the unit s batteries have 10 hours or less of useful life Replace the batteries as soon as possible If the display is blank the batteries are dead Replace the batteries before the unit s next use Remaining Battery Life In the Rate Mode with the BAT indicator blinking press the CLR TEST key A three digit number indicat...

Page 8: ... flap Secure the narrow strap to both the top flap and the side of the case Thread your belt through the slots in the belt loop Figure 2 Using the Carrying Case 4 Operational Verification Tests These Operational Verification Tests should be performed periodically as required by your departmental procedures Installing the Batteries The first time you take your UltraRadiac TM out of its shipping car...

Page 9: ...antaneous Rate Naturally occuring background radiation will cause the unit to display a low reading 1 To switch to the Dose Mode press the DOSE key Press the RATE key to return to the Rate Mode The rate units indicator μR hr will blink slowly to show that the Rate Mode is active 1 Naturally occuring background radiation typically measures less than 20μR h 0 20μGy h or 0 20μSv h Note Because the Ul...

Page 10: ...e unit off Press and hold the ON OFF key OFF will be displayed Then you ll see Release the ON OFF key the unit will turn its power off All data collected up to this time will be stored in memory INSTRUMENT TEST While in the Rate Mode press and hold the CLR TEST key until you see the test display in Figure 4 then release the key 2 Figure 4 The Test Display file C Documents and Settings Buzz Desktop...

Page 11: ... contact your local Canberra Service Center Press the CLR TEST key to return to Rate Mode or wait about 10 seconds Checking the Alarm At any time during the Clr Test sequence of numbers Press the RATE key the audio alarm should sound and the Rate LED the lefth and one below the display should turn on Press the DOSE key the audio alarm should sound and the Dose LED the right hand one below the disp...

Page 12: ...ult in that key s circuit Function Indication DOSE 0 0 2 ALARM 0 1 0 RATE 0 0 1 LIGHT 0 2 0 CLR TEST 0 0 4 2 The GN located in the upper right corner of the display is used only by maintenance technicians It s shown here so you can verify that the entire display is operating properly ENDING THE DISPLAY TEST At the end of the test sequence the blinking 9 will appear indicating that the Rate Mode is...

Page 13: ... press and hold the ON OFF key until the SLEEP indicator disappears The unit will cycle through the 0 4 startup sequence then return to the Rate Mode Figure 5 The Unit is Asleep COMPLETING THE TESTS When the UltraRadiac has passed all tests the unit is ready for operation If the unit fails any of these Operational Verification Tests contact your local Canberra Service Center GM TUBE FAILURE INDICA...

Page 14: ...ndicate that The dose rate exceeds the range of the UltraRadiac The error might be greater than 20 The value of the displayed dose rate and consequently of the calculated dose is not accurate The true rate might be significantly higher than the displayed value 5 Setting Up the Unit This chapter has been written for the System Administrator the person responsible for your organization s UltraRadiac...

Page 15: ...Rate for a severe hazard The alarm indicators will remain enabled as long as you remain in the radiation area that triggered the alarm High Threshold There are several indicators for the High Rate Alarm Threshold Figure 7 Visual Enabled The entire display and the left LED will flash quickly Audio Enabled The audio will beep quickly file C Documents and Settings Buzz Desktop radstuff Dosimeters ch ...

Page 16: ...s when background noise makes the audio alarm hard to hear Clearing the Rate Alarms The Rate Alarms are triggered when the measured rate exceeds either of the preset alarm thresholds Clearing the Low Rate Alarm Press the CLR TEST key to acknowledge the alarm condition and turn off the vibrator and the audio low rate alarm The Rate LED and the display s ALARM indicator will continue to flash slowly...

Page 17: ... alarm threshold setting If the optional Vibrator Alarm has been activated the display will alternate between the threshold value and a vertically scrolling horizontal bar The unit will automatically return to the Rate Mode display about 10 seconds after the last keypress Changing the Rate Alarm Indicators Press the ALARM and RATE keys You ll see an H for High Level Alarm displayed To change the L...

Page 18: ...rm Indicators To choose one or more of the alarm indicators for the selected alarm level Repeatedly press the ALARM key until you see the desired combination of indicators AUDio VISual vibrator or no indicators Setting the Alarm Threshold To set the threshold for the selected alarm level Figure 8 Press the CLR TEST key the decimal point and the threshold unit indicator will begin to flash Repeated...

Page 19: ...bove two steps to select and lock in each of the two remaining digits When the last digit has been set the entire threshold value and unit will flash Press the CLR TEST key to return to the Rate Mode or wait about 10 seconds THE DOSE MODE When the unit is on dose data is continuously accumulated and updated every two seconds To enter the Dose Mode press the DOSE key file C Documents and Settings B...

Page 20: ...e Alarm Indicator below Clearing the Accumulated Dose To clear the Accumulated Dose and reset its memory Press and hold the CLR TESTand DOSE keys the display will begin to flash When the flashing stops release the CLR TEST key The display shows all zeros dose data will begin to accumulate again The Dose Alarms There are two Dose Alarm thresholds Low Dose for a minor hazard and High Dose for a seve...

Page 21: ...he right LED will flash quickly Audio Enabled The audio will beep quickly Optional Vibrator Enabled The unit will vibrate Low Threshold There are several indicators for the Low Dose Alarm Threshold Figure 9 Visual Enabled The ALARM indicator and the right LED will flash slowly Audio Enabled The audio will beep slowly Optional Vibrator Enabled The unit will vibrate Clearing the Dose Alarms The Dose...

Page 22: ... have to reset the dose memory to zero See Clearing the Accumulated Dose Reading the Dose Alarm Thresholds Press the ALARM and RATE keys You ll see an H for High Level Alarm displayed To read the Low Level Alarm setting press the DOSE key again the display will show an L Press the CLR TEST key the flashing display will show the selected H or L alarm threshold setting If the optional Vibrator Alarm...

Page 23: ... keypress Changing the Dose Alarm Thresholds To change the High level H or Low level L settings Press the ALARM and DOSE keys You ll see an H for High Level Alarm displayed To access the Low Level Alarm settings press the DOSE key again the display will show an L Press the CLR TEST key the flashing display will show the selected alarm level H or L settings If the optional Vibrator Alarm has been a...

Page 24: ...eft most digit will begin to flash Repeatedly press the DOSE key until the desired value of the digit is displayed Press the CLR TESTkey to lock in the digit s value The next digit will begin to flash Repeat the above two steps to select and lock in each of the two remaining digits When the last digit has been set the entire threshold value and unit will flash Press the CLR TEST key to return to t...

Page 25: ...source of the radiation The Rate and Dose modes are active when the Source Finder Mode is enabled This means that you can read the higher Rate or Dose without exiting the Source Finder Mode Enabling the Source Finder Mode Press and hold the RATE key until the display changes to a flashing 1 Release the RATE key Exiting the Source Finder Mode Press and hold the RATE key until the display changes to...

Page 26: ...u to radiation for as long as five minutes before you are alerted Enabling the Sleep Mode Press and hold the RATE key then press the ON OFF key until you see SLP on the display When you see release both keys You ll see the SLEEP indicator at the top of the screen Figure 10 Figure 10 The Unit is Asleep When the Unit Wakes Up It compares the current Rate with the Rate Alarm thresholds file C Documen...

Page 27: ...rtup sequence The unit will then enter the Rate Mode THE DATA LOGGING MODE The Data Log lets you record up to 300 individual dose rate data pairs each with an index number for later retrieval This is useful for performing a survey or for cataloging readings Capturing Data Pairs To capture data pairs the unit must be ON and in the Rate Mode Press the RATE and DOSE keys together Hold both buttons do...

Page 28: ...ton will next display the Rate data and scrolling up once again will display the Dose data Scrolling down RATE button will reverse the order of sequence numbers but will still display first Rate data then Dose data Scrolling will wrap around the memory from first index entry to last or last to first To return to normal operation the unit must be turned off and then on again normal turn on sequence...

Page 29: ... Cleaning the unit Inspecting the battery compartment s door gasket Inspecting the battery contacts for corrosion CLEANING THE UNIT Remove dust moisture and loose dirt from the outside surfaces of the UltraRadiac TM with a clean soft cloth If necessary the unit may be cleaned with a mild solution of ordinary detergent and water rinsed and thoroughly dried THE BATTERIES If you re installing batteri...

Page 30: ...stener a quarter turn counter clockwise swing the door open and slide out all four batteries Install fresh batteries in the order shown in Figure 11 Be sure to observe the polarity next to each of the four battery slots The end of the battery facing out should match the slot s marked polarity as shown in Figures 11 and 12 Figure 11 Location of the Batteries file C Documents and Settings Buzz Deskt...

Page 31: ...ies correctly installed close and latch the door See Latching the Compartment Door Figure 12 The Battery Polarity Indicators file C Documents and Settings Buzz Desktop radstuff Dosimeters ch 31 of 33 4 11 2014 6 15 PM ...

Page 32: ... be whole and entire If the seal is cracked or broken the unit may no longer be watertight Inspect the O ring seal around the door latch s post Figure 13 If the seal is cracked or broken the unit may no longer be watertight For repair contact your local Canberra Service Center Figure 13 The Inside of the Battery Door When the inspection is complete close and latch the door See the following sectio...

Page 33: ...ch will engage When the door is properly closed it will be possible to lay the fastener s D ring down in the cover s fastener recess Note When the door is latched the unit may turn itself on in the Sleep Mode Press and hold the ON OFF key for about 2 seconds The unit will cycle through the display startup sequence page 15 then enter the Rate Mode file C Documents and Settings Buzz Desktop radstuff...

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