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Cypher Manual

1. vec PREAMP SCA WINDOWS ow R9 go VARIABLE BEEPER 180 35 1 1 L m ons us m 255 7 PREOUT LP3 SONA diy TERT k lt MH 015 055 014 8 ACE 40106 x RS R12 4 B Sen 1 U10 C x l ic n Ee 12 i I 11 i WT aot 1k x 2 Te ab m 5 POS E s m ae Waaa i 2 vec Pim uu eur 2 C13 R14 oe 10 n 1 E 5 HUCURRENT 32 E 13 comp 100 2 2K cc VIOE U16 A 91915 2992 ES Y I 21 ssn T sgh TLC271 4040 10 0K R16 LP339NA Sou 22 Sx Ut5D d uisg 325 U14 A E Zon i R19 ADCDAC g sero SA 555 Fo ab2 1k R22 gt N ub gt ese 15 1 00M 1N4148 Vu 100K 4 13 601 uF R23 LP339NA amp A 14 e 5 2 2 100K IPHONE ona U19 04066 R24 160K
2. 100K R1 RESET Tp1 ON BUTTON RESET 1 U1 B 6 se 2 2 4 88 E TLC272 4 5 BATREF 74HC573 AN EPROM 22 pF c2 E 02 amp La 2335 dg 5 Gea LCD ca ALPHANUMERIC DISPLAY 35 RESET M 2 o oL 19 40 172 8 24016 U D Aga po 20 35 42 L 05 5 7 3728 ADS b lo so TEAS Uz MPS6534 i sw u6 App 7 0 5072 45 1 ee z ADe E 13 48 53 3 LU PE TP2 9 eo o 1227 a 7 2 idi 22 19 de R50 31d PES AE M 9 47 1 R51 PSEN BN DATA 82 AS crun gt S4 1 rerz meae 39 Qe a MODE T o spe poya a LEER as s AP ADDRESS A E 5 5 Pb4 AD4 So po 2324 3 LE 42 Sk Spis AOR Ross 5 A m 1 or i He e ni 5 WER c2 k ie vus pana a E325 md LCD BACKLIGHT ON PS0N 0FF 18 im mama ata AS 15 05 uh H NIST PNT P23 AH 22 uo Yes oL 07 12 06 i S6 CAL ONZOFF 1503070 passais 26 A3 oss 2 lj pse WR P26 314 37 ATE 5 gal 15 205 2 TPS pesait j pa an ats 1 9535 ABS we fa BOC32AH cae i 22K os 505 1 276256 TF T eS A paspa LA IE 929 JP3
3. com jon VARIABLE Tech nician Front Panel Enable Auto Off Time Softkey ight Labora tory on em m of of Medical Proffess ional on m Function Menu 1 Left Functi Functi Functi Functi Functi Functi Detector Number Menu 2 Left Menu 2 Center Menu 2 Right Menu 3 Left Menu 3 Center Menu 3 Right Bep o ib ib Dm Wn e Um _ tight ts _ All have the following settings Deadtime is setto on for Rate and Integrate and to off for all other modes The Bargraph is set on the Digital Rate is on the Display is normal and the flash barscale is off Auto Power Off is setto 108 min Buzzer is setto loud on all ranges on on rate ranges and off on integrate scaler 20 Programming Using a Preset Instrument setting will change the variables listed below To program the Cypher using the Preset Instrument settings do the following 1 Enter into the Setup Menu by turning on the instrument with the MODE button pushed down If this does not result in the words Calibration 1 in the display then the Front Panel Calibration Adjust has been disabled and it is necessary to use the internal one open the case and push down on the CAL push button top right hand side ofthe circuit board under the display while turning the instrument on The words Calibration 1 should be on the display 2 Using the 1 or T softb
4. o1 15 29 ji Callow Part of Calibrate Number Diait __ 92 156 220 _ Exnonent X Exponent i157 21 Prefix Base o4 fsa 2 nits Base Units o5 159 223 DisplavTvoe Where D pointis Loo 160 224 Ranae Lo Limit Limit forTvne ranaina down 9 16 225 Ranoe Hitimit Limitforranaingun 98 122 226 DisolavConfa ConfiouretheDisolv 9 12633 27 NotUsed C Ef 100 14 283 Jj NotUsd Ef 102 166 23 Q Gain Gain 103 167 J2 Discriminator Discriminator 1044 168 232 Window Window 105 160 1233 Deadime 1 106 a7 1 o2x3 jJ HiahVolaae HiahVoltaae 107 an 23 Saturation _ Saturation 108 172 236 Widowin out Windowinorout NOTES Setting for the instrument with detector Settings for Detectors not for modes MODEL 5000 CYPHER Health Physics Instruments Description of Custom Settings The following descriptions are in alphabetical order 1 Button This selects the function of the button AND QUICK KEY BUTTON DEFINITIONS Buzzer Divider Sets buzzer divider Detector Set Chngs to det 1 2 or 3 Mode Change changes the Mode 2 Button This selects the function of the A button and has the same choices as the
5. 3 Using the J or T softbuttons repeatedly push them until Custom Settings 5 is visible Push the ok softbutton 4 The display will now show Loc Data on the top line and numbers on the bottom line These stand for location and data The location is the place in EEPROM memory that holds the data The data is the value that is stored in thatlocation Data and location have values from 0 to 255 The 3 digit number under Loc is the current location The 3 digit number under Data is the data for that location The right hand softbuttons change the numeric value of the data or location The lt Softburtton will move the cursor over 1 place and the T softbutton will increase the value of the number positioned over the cursor Using the two buttons you can change the value of either the location or the data The POWER button is a softbutton even though it is not marked Pushing it will move the cursor from the Location value to the Data value If the Data has been changed pushing the POWER button will save the data This is the only way to save the data The display will show the programming message Pushing both right hand softbuttons down simultaneously will change the softbuttons from and T to 4 and T In this configuration the softbutton will raise and lower the value ofthe 3 digit number that is above the cursor Health Physics Instruments User Units and Timebase 1st character User Units and Timebase 2nd ch
6. If you want to use the SCA with a scintillator to look at a peak we recommend that you set the gain to 2 the window to IN and to 30 Set the DISCR to some value below 100 that is meaningful for the energy you are using The range of the setting is from 0 to 255 but itis linear only from 0 to 100 It is best if the counting region is set between 50 and 100 With CS 137 which has a peak of about 630 KeV we could put itin channel 63 which would calibrate the instrument directly in KeV Set the discriminator to the value that puts the window in the middle of the peak In this case the window is 30 and half of 30 is 15 Reduce the discriminator by 15 from 63 to 48 which centers the peak on the window Place a check source that has an energy peak that is centered in the window on the scintillator and adjust the high voltage until the count rate in the right top is the highest Start at a low high voltage of 400 volts and raise it slowly Each time you adjustthe high voltage wait a second forthe reading to stabilize You should be able to go beyond the peak and see the count rate decrease but be cautious of increasing the high voltage beyond the limit of the detector If you do not have a check source that is the same energy as the energy you want to detect you can still calibrate the scintillator and instrument as mentioned above then move the window to the appropriate region It would probably be a good idea to increase the window setting justto be su
7. button 3 Adjust See Check 4 Bargraph Type This is the full scale value of the bargraph It allows four choices for full scale on the bargraph This will not change the calibration of the instrument but will alter when the range change occurs The Digital display will change ranges to keep the bargraph on scale 10 Setting 1 is usually used for full scale however for different applications any of the others are equally applicable The 5 decade log display is a quasi log with linear values between the decades Each decade is represented and each decade is linear This mode will make the digital display change ranges the same as type 1 Change the bargraph scale inside the instrument located above the display under the window if you change this value The log bargraph is set with the Range Lo Limit as the beginning ofthe range BARGRAPH TYPE 25 1 10 100 1000 1 25 2 5 25 250 2 5K 5 5 50 500 5000 5 decade Log 5 Beeper Divider The beeper divider divides the pulses from the detector before sending them to the beeper This is useful with detectors that have higher count rates such as scintillators It is hard to distinguish changes beep rate when the beeper is on almost all of the time Setting the divider to a higher number will reduce the number of beeps and make changes more apparent BEEPER DIVIDER Ent puo gt e 1 s 13 28 6 Cal High Low This is the value of the Calibra
8. CHECK TABLE Setting Adjust just All Auto Power Front Panel Scaler Kn Turnoff Calibrate 8 Contrast Sets the contrast of the instrument This is normally set with the Contrast adjustment LCD softbutton It is preset to 160 in the Factory Setting If this is incorrectly set it may be impossible to read the LCD If that is the case use the Emergency Contrast Adjustment 9 CPM CPS Internal Timebase This selects the internal timebase of the instrument There are 2 choices CPM Counts per minute or CPS Counts per second If this is setto CPM and then programmed with the Instrument Setup Detector Setup or Factory Setup menus the instrument will be in conventional units and the rate range will probably read in mR h If itis setto CPS and then programmed with one ofthe 3 Setup menus the instrument will be in SI units Set this to 0 for Conventional Units and 1 for SI units or use one of the choices in the Setup Menus There is another reason for using CPM or CPS One ofthe choices with the MOD softbutton in the Function Menu during normal operation is CPM If you wantthis to be CPS then you must choose the CPS internal timebase If you want it to be CPM then you must choose the CPM internal timebase If you change this setting then you must recalibrate the instrument For more information see the section on Programming Internal Timebase 10 Current Mode This is the current mode Setit to a mode that is currently in use Also see
9. High Voltage 28 Cal 28 Calibration 18 32 Setting 14 Setting Menu 18 HLD 7 8 Hold 8 HOLD 8 Hours remaining 4 I IN 8 Instrument Variables 16 INT 5 7 Integrate Calibration 11 14 range 5 Range Calculation 14 Range Setup 14 Internal Timebase 12 16 23 26 31 Menu 17 Introduction 2 L Laboratory Inst Setting 20 Languages 33 LBAT 5 LCD 7 light 4 LT 7 38 Maintenance 32 18 Mode 32 MED 7 Medical Inst Setting 20 Memory Locations 24 Menu 3 Adjust 9 Calibration 19 Custom Settings 24 Function 7 Selecting 17 Setup 17 Viewing 17 MOD 2 5 7 Mode 7 31 Calibrate 8 10 CPM 5 Description 5 Lockout 28 MODE Button 3 Rate 5 User 6 12 MODE 2 7 N Nai 1x1 Preset Det 22 Neutron Prop Preset Det 22 Numeric display 5 NXT 2 7 7 8 ON 7 8 Operational 9 OUT 8 Overrange 5 MODEL 5000 CYPHER P Pancake GM Preset Det 22 Plateau 14 Power Off 26 Time 28 User 29 POWER 2 4 Prefix 12 13 29 Table 14 34 Preset Detector Menu 12 17 22 Preset Instrument Menu 17 20 Problems 33 Professional Inst Setting 20 Programming 16 21 Custom Settings 24 Preset Detector 22 Setup Values 15 Q Questions 33 Quick Start 2 Quick key 4 18 31 Programming 25 Table 25 R Range Calculating Maximum 13 Calculating Minimum 13 Down Time 29 High Limit 13 29 Integrate 5
10. 1 would have the next higher prefix units timebase See the example column The above table shows the range of the instrument The 2nd column contains the values that are used in the Detector Setup Menu These correspond to the values in MODEL 5000 CYPHER Health Physics Instruments the 3rd and 4th column that show the range of the instrument The 5th column is the change in prefix up or down from the selected nominal value 3 Integrate Range The setup of the integrate range is similar to the rate range There are fewer choices in this mode a Calibration Factor and Exponent using Rate Range If the integrate range is in the same prefix units as the rate range then the same Calibration Factor can be used in calculating the integrate range Calibration Factor If the rate range is in mR h and the integrate range in mR then they are considered to have the same units Divide the Calibration Factor with Exponent by 60 if the internal timebase is in CPM and by 3600 if the internal timebase is in CPS This is the new calibration Factor and Exponent for the integrate range Mark the Units Prefix Calibration Factor and Exponent on the worksheet b Calculating the Calibration Factor and Exponent If the integrate range is not in the same prefix units as the rate range then you need to determined the basic units and prefix that you will want to use Calculate the basic prefix unit per counts For example if the GM pancake detect
11. Low Limit 13 29 Up Time 29 Range High Limit Calculating 13 Integrate Range 14 Range Hold 5 7 Health Physics Instruments Range Low Limit 14 Integrate Range 14 Rate Only Inst Setting 20 Rate Ranges 13 Reset Emergency 4 RH 7 RST 5 RTE 2 7 RUN 5 S Saturation 15 29 33 sav 18 Scaler 5 Schematics 35 Scientific notation 10 SCL 2 7 SET 7 Set Time Mode 5 SETTIME 5 Settings 12 20 22 Setup Menu 17 Menus Accessing 17 Programming 15 Setup Menus 18 SFT 7 SLO 7 Softbutton 27 Softbuttons 3 Specifications 1 Standard Inst Setting 20 Stats 29 5 Surveyor Inst Setting 20 T TC 7 Technician Inst Setting 20 Thin End GM Preset Det 22 Thinwall GM Preset Det 22 Time Integrate Range 29 Scaler 29 Setting 5 Time Constant 7 29 Timebase 12 13 30 Timer 5 TME 2 5 7 U Units 12 13 30 Update speed 5 User Characters 30 Mode 6 12 Setting 28 User Interface 3 USR 7 12 V Variables 16 24 31 Detector 16 Table 20 Table 24 version number 4 W WIN 8 Window 8 15 30 In Out 30 Worksheet Detector Setup 34 39 MODEL 5000 CYPHER Health Physics Instruments 40
12. Pulses from 0 to 30 and from 90 to 255 will not be counted It is best set interactively in the Detector Setup Menu Pulses range from 0 to around 100 40 WINDOW IN OUT This turns the window in and out If itis set to in then only counts that have a pulse height within the window will be counted If itis out any pulse larger than the Discriminator will be counted 30 MODEL 5000 CYPHER XVII Customizing the Cypher The Cypher may be customized by changing the variables The operation of the instrument is very programmable The section on the Custom Menu describes each of the variables The Description of Custom Setting Menu shows all the possible settings for the Cypher We offer the following tips and suggestions on how to change the instrument to meet your particular needs C Buttons Probably the most useful changes to the instrument revolve around the buttons This includes both the Quick keys and the Function Menus They both can be modified to meet your needs The Quick keys are the buttons that are on the right hand side of the panel and are active during CPM S Rate and User Modes These are also referred to as the and A Quick keys They are factory setto Beeper and Light which are probably the most generic uses of the controls on a survey meter There are 7 other choices that are available If you do not need the light or beeper then you may consider using either button for either the Range Hold Hold or contra
13. Softkey and key User defined for rate CPM CPS and user modes Choices include Light Beeper Hold Reset TC contrast buzzer divider detector number mode selection and Range Hold Bargraph Moving digital pointer on background of scale markings Updated 10 times every second Full scale of 2 5 5 or 10 and 5 decade log are user selectable Bargraph width is 2 2 in 5 6 cm Markings for each scale are user changeable from inside the instrument Supplied with many different scales Full scale markings are actively shown on the display in the proper units amp prefix but may be turned off Detectors Accepts 3 different detectors Each detector is setup with its own setup which includes modes calibration deadtime saturation display window threshold high voltage Additional setup options Display exchange 1 and 2 lines time to range up time to range down min range max range decimal point prefix change limit Auto turn off time Response Range from detector 0 1 to 1 000 000 CPM without deadtime correction Accuracy Within 196 or 2 digits for count rates from 1 to 1 000 000 CPM Timebase is crystal controlled Radiation accuracy is dependent on probe Time constant Dynamically set depending on count rate but has settings of short medium and long Dead time correction Corrects up to 4 times actual rate May be independently set on or off for each mode Environmental Temperature range 5 to 50 C Tempera
14. pror written permision 4 u 14 C45 9 1 90097245 Ti ON OFF Pl Pl itle P339N 77 018 07860 SCHEMATIC PREAMP BUZZER 2N4124 R46 C47 ic Ld K wi Size Number Rev lt 10M 8 1 5080 001 A 05 2 t I POWER SUPPLY TOR LOW VOLTAGE POWER SU FOW VOLTAGE DETECTO NEGATIVE VOLTAGE GENERATOR Date 4 93 Drawn by JSHJR jJ Thu Aug 08 1996 Filename 5000 502 Sheet 2 of2 MODEL 5000 CYPHER Health Physics Instruments 36 PARTS PLACEMENT Ge s A CA eX IC Lf REV A O 9 O 1 U2 HPI 5000 8010 32 U4 91 C20 DANGEI 90 lt 27 O T SIDE MODEL 5000 CYPHER US TPS GND Health Physics Instruments U19 R28 U13 Tp5C46 O a dumb 4 S R26R30 C17 U16 1 C3 JP4 2 IGH VOLTAGE Old um U8 U20 Adjust 9 18 25 26 Menu 9 On Off 9 Using 9 All Inst Setting
15. 00 TME RUN SCALER Setting The Time The time can be setin both the integrate mode and the scaler mode Push the TME softbutton when in either of these mode to access the Time Setting Mode The time is set separately for the integrate and scaler and is stored separately in permanent memory If you turn the instrument off or change modes the time will be remembered The left side of the display shows the time in HOURS MINUTES SECONDS The right hand top shows the word SETTIME to let you know that this is the Set Time Mode The bottom left softbutton is RST This resets the time to 00 00 00 The softbutton moves the cursor one digit to the left The T softbutton increments the digit that has the cursor under it Move the cursor to the digit you want and increment it to the number you want When the time is setto the correct value push the OK softbutton to get back to the mode If the time is setto a number other than zero then the time will count down and stop at zero If the time is set to zero then it will start counting up and will continue up to 99 59 59 whereby it will reset and continue counting up If you set 68 minutes in the display when you change to the Integrate Mode or Scaler Mode the time will be recalculated to the correct hours minutes seconds In this case it would show 01 08 00 which is the same as 68 minutes This works for seconds also The cursor will be on minutes when entering the Time Setting Mode because m
16. 20 Alpha Scint Preset Det 22 Appendix A Worksheet 34 B Schematics 35 Automatic Turn Off Menu 18 B Backlight 7 Bargraph 5 Log 15 26 Printed Scale 31 type 15 Type 25 Battery 4 Change 9 Low 5 9 Beeper 4 7 29 Divider 8 Divider 26 BNC 9 Button 3 31 25 25 BUZ 7 C CAL 8 17 Calibrate 26 MODEL 5000 CYPHER INDEX Cal Button 17 Factor 10 Menu 17 Mode 8 10 Verify CPM 11 Verify Scaler 11 Calibration 10 17 Button 17 Factor 10 11 14 26 Calculating 13 Integrate Mode 11 Menu 18 19 Rate Mode 11 Check 26 Contamination Inst Setting 20 Contrast 7 26 Emergency 4 CPM 7 12 17 CPM Only Inst Setting 20 CPM Timebase 18 CPS 12 17 Current Mode 26 Custom Settings 25 Menu 17 24 D Deadtime 8 9 12 26 27 33 Factor 10 DET 8 11 DET SETUP 19 Detector 8 1 2 or 3 8 Changing 11 Connection 9 Max 27 Number 27 Sensitivity 12 Setting up new 12 Settings 14 Setup Menu 12 17 19 Health Physics Instruments Variables 16 Discriminator 15 27 Display 31 Configuration 27 type 15 Type 27 DIV 8 DK 7 DTM 8 E EEPROM 32 Engineering Format 27 Exponent 11 14 27 Calculating 13 EXPONENT 10 F Factory Setting 32 Factory Setting Menu 18 Failure 1 4 32 Reprogramming EEPROM 32 Front Panel Calibrate 26 Menu 9 18 FST 7 Function Menu 7 27 31 Table 3 G Gain 15 28 H H7
17. EXTERNAL BUTTON 1 instrument is turn it off 2 Push the MODE button and hold it down then push the POWER button Continue to hold down the MODE button until the Setup Menu appears If the regular turn on menu appears instead then the front panel has been disabled and it is necessary to use the internal button in Method 1 Scrolling Through The Setup Menus The Setup Menu is the main menu that directs you to several other menus or operations The top line of the display shows the selection that is offered followed by a number Each item is numbered and has a before the number to identify it The bottom line contains the T softbutton and softbutton and the ok softbutton Push the Tsoftbutton to go to the next item on the list Push the 4 softbutton to go to the pervious item on the list When you have the selection that you want push the ok softbutton The screen will then change to the new item Health Physics Instruments ii Setup Menu Selection The following is a list of menu selections in Setup Each selection has a followed by a selection number to make it easier to find If a Softbutton is labeled this means that pushing it will get back to this menu The menu selections and their definitions are listed below 1 Calibrate 1 This is the menu to change the calibration of the instrument Please see the Calibration and Detector Setup Menus for a full understanding of how to use th
18. Mode Lockout CURRENT MODE TABLE GUNENTWODETAEE 0003 me o i P P 11 deadtime This should be the Deadtime for the detector and if the Deadtime is turned on will correct for dead time losses at high count rates Set itin microseconds from 0 to 255 12 Detector This is the current detector that is in use It determines which detector is in use nothow many detectors Setto 0 if you have only 1 detector Set it to 0 if you 26 have several detectors and use the DET softbutton in normal operation to change the value Its value is changed every time the detector number is changed 13 Detector Max This limits the number of detectors that can be selected by the DET softbutton in a Function Menu Set it to 1 for 1 detector 2 for 2 detectors and 3 for 3 detectors 14 Discriminator This setting may also be though of as a threshold Itshould be set high enough that there are no counts from noise It may be set from 0 to 255 butis linear only from 0 to 100 It is best set interactively in the Detector Setup Menu 15 Display Configuration Changes the look and feel of the display The Bargraph can be turned on and off as can the Numeric Display in the CPM S Rate and User modes The Display can be setto normal with the bargraph on the bottom or it can be inverted with the bargraph on the top The Bargraph scale can be setto flash DISPLAY CONFIGURATION ize or of roma normal No flash normal
19. The tables below show the values in each ofthe locations The first table covers Settings Finally program the new value into that location using the Custom locations 0 to 36 The second table covers locations 25 to 27 and 48 to 255 Settings Menu Description NOTE Some of the variables are only for the instrument some are for the 0 Check X Contains Adiust Power off EEPROM check value detector and some are for the detector and each mode One is for the instrument and the mode Current mode of instrument 0 5 1 Rate 2 User 3 Int4 Scaler 1 Disconnect the current detector during this operation if you are changing the 4 1 Contrast Defautis160 j high voltage and the new voltage may damage the detector 6 Time for intearate ranae 2nd Diait SettoO 8 Timesc3 Time for scaler 3rd Digit Setto0 9 Timesc2 Time for scaler 2nd Diait Setto0 11 2 Enter into the Setup Menu by turning on the instrument with the MODE button pushed down If this does not result in the words Calibration 1 in the display then the Front Panel Calibration Adjust has been disabled and it is necessary to use the internal one open the case and push down on the CAL push button top right hand side of the circuit board under the display MODEL 5000 CYPHER while turning the instrument on The words Calibration 1 should be on the display
20. U4 C JP2 1 U4 D 9 pa 12 ci c2 g2 yele u Jo 2 2215 13 d cd 74HCOO T 74HCOO roln 144 Tin Hi hear Tene EARPHONE l ve BIRIN R26UT 9 ESTA LCD READ DATA E 00H uen 1 nie ass LCD WRITE DATA COOH Sie ces Bore ZH LCD READ STATUS A000H m suu E j aieo pee LCD WRITE STATUS 8800H 22uF c7 MAXZ3ZCPE 22 uF c8 7 4 OUT PORT WRITE 7000H 15 16 1 12 120 O y a7 EO e 3 74HC574 1 2 VCC Dx 5 g me L R5 00k P aa RS232 CERES 7 ote 8 VBATSW SDATA B 3 BZVOL R6 162 Le Ve UD E uy J1 8 U1 F ub 47 i RIA 5195 Bog gt m m mma 2 i A stic271 op r eh eee 40106 gl 3 s uy a ovo 7 12 ie Wes LCD CONTRAST DEG sax 7 00 svoc SS S S os 2 Jg 285 ESS 2 J2 4 d DIGITAL TO ANALOG CONVERTER DES nm Fai a or vec l OPTION 5 Vil puse fonat Title e donent cota propre SCHEMATIC DIGITAL Pisonia V rey vel be er tener Darian a or any oar purpose Size Number Rev Tie pror ann pamaen C 5000 201 Date 4 93 Drawn JSHJR Thu Aug 08 1996 by 5 Filename 5000 S01 Sheet 1 of2 MODEL 5000 CYPHER Health Physics Instruments 35
21. a CPM rate range as well as a scaler It would normally be used with a pancake GM detector 5 Surveyor This is intended to be used as a general replacement GM instrument It has CPM and Rate ranges 6 Technician This is useful for technical personnel It has CPM Rate and Scaler It also changes the A Quick key to Range Hold It will accept 2 detectors Laboratory This is useful for laboratory use where many people will be using it Ithas CPM Rate and Scaler modes and only 1 Function Menu 8 Medical This is intended for Medical contamination and surveys It has Rate and CPM ranges and only 1 Function Menu Health Physics Instruments 9 Professional This is for the Professional who knows what they are doing Ithas the 4 standard Modes of CPM Rate Int and Scaler The A Quick key is used for Range Hold and it will accept 3 detectors 10 All This tums on almost all the functions It has 3 Function Menus and 3 detectors The Preset Instrument Setup changes the following variables Please note that they may reprogram some items such as contrast that may need adjusting Only Only ination ps T Function Menu 1 Left Esp t Fonton Men tcen Function Menu I Right Mode Mode _ icb T T Function Menu Center lige T 1 Function Menu 2 Right Bep o T FuntonMem3lek
22. ad i R5 j b L x RES f a x SA 42 338 gs 88 S s 4001 Tp6 58 5 U19 8 12 Ie R27 47K U13 D 07 ES ds 2 a Bk os 4065 _ 13 U13 A Sr U19 D HIGH VOLTAGE POWER SUPPLY 4066 4001 4001 4 Se 1448 GAIN CONTROL 04 1 PX2 1 2 EE BUZZER PX2 2 J4 2 0047 L BEEPER vec C20 X a S28 470K j 107 FR107 FR107 R32 Yeg R34 ER 4 Kgs igs cigs ls ne er 09 D10 D11 2 af les is i soar 44o are A ier SER sF ols 1408 2 HRED STS STS s2 E N TP8 vee h 4066 o4 pos RESET HVCURRENT amp a R36 3 ur TRE 3 HVDAC 1000M R37 ol g cont 3 VQ 10272 L ls oy MIS 19 x R38 ES BL ono STS Sage vec C29 100K W sg a8 7555 s S 6 M s DC 106 pF esse 2 T sls i 2 3 le 1 55534 g L 244124 P Vee OTOTOT STS 2931 www CND LP2931 YS 022 021 VBATSW 1N4148 L 3M BATCHK He s vec DiS D15 m a 1 04 uo 2 2 5 s avoc 595 56534 eT STO 100K 925 1N4148 m Heth Physics Instruments 5 SA N eet iis s k Tit document concins proprietary R40 eu 5 NTO ntormation It mey not be reproduced UI N or tronstered to one E 1N4148 L TR ui5 c 100K 22u N _ 22 ot ny ter purpose amp VA A K PBON OFF PA AA 2 c osl
23. can be used for the detector If the deadtime correction is turned on the instrument can be operated at a higher rate than if itis turned off The instrument will count up to 1 million CPM or 16 666 CPS with deadtime off The formula is below There are 4 possibilities with and without deadtime and CPM and CPS timebases Choose the correct one for your application The Deadtime is usually turned on for Rate Ranges Deadtime is in seconds 15 psec is 15 x 10 Sec Note the values the worksheet For example with a CPM timebase and the deadtime of 100 uSec turned on the highest level for the GM pancake detector would be 204 100 x 10 2 040 000 CPM CPM Timebase Deadtime off Highest level CPM 46 3 deadtime Deadtime on Highest level in CPM 204 deadtime CPS Timebase Deadtime off Highest level CPS 772 deadtime Deadtime on Highest level CPS 3 4 deadtime 2 Calculate the maximum level that can be displayed on the instrument by multiplying the maximum level times the Calibration Factor Note the value on the worksheet Max Level in Units Max Level in CPM CPS x Calibration Factor For the example this would be 2 040 000 x 4 76x 1 971 mR h This figure can be helpful in determining the maximum range that can be used with the detector f Determining the Minimum and Maximum Ranges Now itis necessary to determine the minimum and maximum range The instrument will calculate and display the appropriate value
24. entry into calibrate mode Internal construction Circuit board hinges for easy access Batteries are mounted on an aluminum panel in nylon holders ICs are socketed All components are standard types Electrical Detectors Accepts GM proportional and scintillation probes Display 2 line x 16 character alphanumeric supertwist LCD with backlight Backlight may be timed or on off Contrast adjustable from front panel Audio Built in piezo beeper at 2 4 kHz Setable to beep at every 1 8 64 or 2048 counts May be switched to off soft or loud Single Channel Analyzer may be switched in or out Threshold window amp gain digitally set from front panel internally or both Gain has three settings Threshold and window 200 settings High voltage Adjustable from 300 to 2000 Volts for GM and proportional detectors 300 to 1600 Volts for Scintillators with 100 meg voltage divider Actual measured HV can be displayed on the screen Saturation detector Measures high voltage current and will show off scale on D the highest range if saturation is detected This is software adjustable for each detector Batteries 6 AA cells for 200 hour life May be adopted for 9 volt batteries Battery condition displayed atturn on and turn off Low battery warning during operation Instrument will automatically turn off when batteries are too low for proper operation May be setfor auto turn off Calibration and parameter storage Data stored in perman
25. is turned on The common setting is 10 which turns the deadtime correction on only for the Rate and Integrate modes 18 Exponent This is the value of the Exponent in the instrument It is a positive and negative number that rolls negative at 255 Thus 0 is zero 5 is 5 and 252 is 4 Itis best set in the Calibrate or Detector Setup Menu EXPONENT TABLE 19 Front Panel Calibrate See Check 20 Function Menus There are 12 different possibilities for the Function Menus These are the softbuttons 1L refers to the 1st Function Menu after you push the MODE button and the L refers to the left hand softbutton really the MODE button C is the center softbutton really the button and R is the right softbutton really the A button There are therefore 3 possible Function Menus each with 3 possibilities If a complete function menu is programmed with 0 in all three locations then the previous Function Menu will be the last one displayed FUNCTION MENU SOFTBUTTON DEFINITIONS None Display will be blank and Softbutton will do nothing Light on off timed 2 Buzzer on off soft Time Constant slow medium fast Contrast adjustment 21 Gain This sets the gain of the preamp Any gain may be used with any detector without damage to the instrument We generally recommend lower gain with GM detectors 22 High Voltage This is the actual high voltage setting Set it from 0 to 255 The value of the high voltage is 9 8 volt
26. level has been calculated above Find which range would be the maximum range based on the above calculations Set the Range Hi Limit to the next higher range Note the value on the worksheet The GM example is shown in the Example column It has the units prefix timebase of mR h which was the chosen basic units and prefix in the three locations marked 0 under Range With Prefix Units With the GM detector example the maximum range as calculated above is 971 mR h 971 would be displayed on as XXX as shown in row 10 Since itis almost at the end of the range itis bestto leave thatrange whole The Range Hi Limit would be setto 3 forthis example The lower range is bestto calculate and would correspond to about 600 CPM or 10 CPS Full Scale If the range goes lower than this then it may not be usable The calculation is Lowest CountRate x Calibration Factor Where the Lowest Count Rate is 600 CPM if the internal timebase is CPM or 10 CPS if the internal timebase is in CPS For the example this would be 600 x 4 76 x 1 0 286 mR h This would be on range 1 on Detector Setup The Range Low Limit would be setto 1 in the Detector Setup Menu DETECTO RANGE WITH EXAMPLE R SETUP PREFIX cn Detector 1 The Row is used for identification purposes only This column represents the prefix The three places marked 0 would have the basic prefix units timebase The three marked 1 would have the next lower prefix units timebase The three marked
27. the new detector General The instrument is modified to accept the new detector by changing several parameters included in the list below Some of these must be changed Some may be left in the default values The items marked with a are accessible from the Detector Setup Menu 1 Bargraph type 2 Calibration Factor and Exponent 3 Deadtime 4 Discriminator 5 Display Type 6 7 8 9 Gain High Voltage Inverted normal display Modes forthe detector 10 Prefix 11 Range hi low limit 12 Range Up down time 13 Saturation 14 Time constant 15 Timebase for each mode 16 Units 17 Window 18 Window in out The units prefix and timebase that are selected for the display are only displayed These values do not directly change the calibration Changing the prefix from m to will not change the sensitivity of the instrument It will only change the prefix on the display The numbers on the display will remain the same To change the sensitivity of the instrument itis necessary to change the Calibration Factor and Exponent A good method of understanding the setup of a detector is to think of a traditional survey instrument with a meter The scale behind the meter the range switch and the calibration adjustment screwdriver adjust set the instrument sensitivity The Scale could be removed and replaced The new scale could have very different units That in itself would not calibrate the instrument you
28. use lithium use 3 ea 3 volt lithium AA cells and 3 dummy AA batteries The hours that are displayed at turn on and tum off are calculated for alkaline batteries Carbon zinc batteries will not give the correct time The batteries are located inside the instrument Access is by removing the bottom case To change the batteries remove the bottom of the enclosure by twisting the twist lock connectors on each end ofthe instrument counter clockwise This should release the bottom of the instrument Remove it and tum the instrument over There are the 6 AA cells Remove the existing batteries and replace them with new ones Replace the bottom of the enclosure If the batteries have leaked into the bottom ofthe instrument wash the case bottom thoroughly with soapy water then with clear water Dry it and replace it on the instrument Do not wash the circuit board The battery holders may need to be cleaned with a dampened cloth or sponge Adjust Simple way to change some settings Adjust is a method of changing the settings for the detector without using the Setup Menus It is designed to allow quick field adjustments without cumbersome button pushing The Adjust Menu is accessed by pushing the and A buttons at the same time If adjust is turned on the Adjust Menu will be displayed Adjust can be setto operate in either all modes or just the scaler mode Adjust allows simple adjustment of the High Voltage Discriminator Window E Window i
29. At high doserates when the detector becomes saturated the display will instantaneously show full scale If the instrument can use only a small portion of the top scale it may be better to limit use of that top scale Likewise at very low count rates if the bottom scale will be at nearly full scale from background then that scale is useless This setting helps to determine the minimum and maximum scales to use For defaults the Range Low Limit can be set to 0 and the Range Hi Limit can be set to 5 This can be corrected interactively in actual use in the Detector Setup Menu To understand the table below imagine that the basic units and prefix which have been set from the above steps are in the three places marked 0 in the column marked Range With Prefix Units The three spaces marked 1 in Range with units would have the next lower prefix and the 3 spaces marked 1 would have the next higher prefix The Cypher will automatically select the higher and lower prefix but you have already set the starting point from the prefix units timebase settings made in the above steps There are 2 reasons for setting an upper range The first is that when the instrument detects saturation or too many counts it will make the Range Hi Limit the range that is shown with the overrange indicators The other reason is to keep 13 from switching to a high range if only a small portion of it can be used because of saturation or deadtime losses The maximum
30. No fash normal No flash vered No fash veted No fash 6 ix of on No fash inverted No flash ise of o normal Flash s gt o et 5 normal normal 16 Display Type There are 4 display types They change the way the data changes the prefix when it changes ranges The 4 types and their settings are l This is engineering format The units change every 3 decades 2 This extends the engineering format up 1 so that a prefix change will not occur when the value moves above 999 For example instead of going from 999 mR h to 1 00 R h this will go from 999 mR h to 1000 mR h with a constant zero in the right hand digit On the next higher decade change the prefix will change 3 This extends the engineering format down 1 decade so that a prefix change will not occur when the value goes below 100 For example instead of going from 1 00 mR h to 999 uR h the display would go from 1 00 mR h to 999 mR h On the next lower decade the display would change the prefix MODEL 5000 CYPHER Health Physics Instruments 4 This is a combination of 2 and 3 where the span of one prefix will be extended up and down 1 decade This is usually the recommended setting DISPLAY TYPE Engineering format Down 1 decade up T decade Up amp Dn Decade 17 Dt On Off Use the same table as in Mode Lockout This controls if the deadtime is turned on or off for each Mode If itis setto ON then the deadtime
31. OPERATION MANUAL MODEL 5000 CYPHER SURVEY METER October 1999 Rev A Health Physics Instruments 330 D South Kellogg Ave Goleta CA 93117 Table of Contents SPECIFICATIONS MECHANICAL ELECTRICAL OPERATIONAL RESPONSE ENVIRONMENTAL INTRODUCTION moomr QUICK START N USER INTERFACE BUTTONS UsiNG MENUS OPERATION TURN ON AND OFF EMERGENCY RESET AND CONTRAST QUICK KEYS MODES CPM AND RATE INTEGRATE SCALER SETTING THE TIME USER FUNCTION MENUS RH RANGE HOLD TC TIME CONSTANT MOD MODE LCD LIQUID CRYSTAL DISPLAY CONTRAST SETTING LTE BACKLIGHT ON THE DISPLAY BUZ BEEPER CONTROL WIN WINDOW DTM DEADTIME DET DETECTOR HLD HOLD DIV DIVIDER FOR BEEPER CAL CALIBRATE MODE OPERATIONAL DETECTOR CONNECTION LOW BATTERY BATTERY CHANGE ADJUST SIMPLE WAY TO CHANGE SOME SETTINGS MODEL 5000 CYPHER Health Physics Instruments I lt om moomr lt Dam lt wu KO 000 1 1 N cono O1 I Ww Q cos ommoogsr gt lt gt DEADTIME CORRECTION RADIATION CALIBRATION CHANGING THE DISPLAY TO CALIBRATE MODE CALIBRATION EXPONENT AND DEADTIME FACTORS DETECTORS CPM amp ScALER MODE CHECK RATE MODE CALIBRATION INTEGRATE MODE CALIBRATION CAL FACTOR FOR INTEGRATE RANGE AND RATE RANGE11 SETTING UP A NEW DETECTOR GENERAL USER MODE DETERMINING THE DIFFERENT SETTINGS PROGRAMMING INST
32. RUMENT AND DETECTOR SETTINGS PROGRAMMING THE CYPHER INSTRUMENT AND DETECTOR VARIABLES INTERNAL TIMEBASE SETUP MENUS ACCESSING THE SETUP MENUS SCROLLING THROUGH THE SETUP MENUS SETUP MENU SELECTION CALIBRATION MENU AND DETECTOR SETUP MENU XIV PRESET INSTRUMENT MENU SETTINGS PROGRAMMING PRESET DETECTOR MENU SETTINGS PROGRAMMING CUSTOM SETTINGS MENU PROGRAMMING LOCATIONS OF VARIABLES DESCRIPTION OF CUSTOM SETTINGS CUSTOMIZING THE CYPHER BUTTONS DISPLAY MODES INTERNAL TIME BASE DETECTOR PRINTED BARGRAPH SCALE 9 10 10 10 11 11 11 11 12 12 12 12 16 16 16 16 16 17 17 17 17 19 20 20 21 22 22 22 24 24 24 25 XVII MAINTENANCE HIGH VOLTAGE CALIBRATION B MAINTENANCE MODE C FAILURE IN DISPLAY D INSTALLING A NEW EEPROM E X gt FACTORY SETTINGS XIX APPENDIX A WORKSHEET APPENDIX B SCHEMATICS INDEX QUESTIONS amp PROBLEMS 34 35 38 MODEL 5000 CYPHER Specifications Mechanical Size overall 7 5 in 19 cm L x 4 2 in 10 7 cm W x 4 45 in 11 3 cm H w o probe holder Gasketed splashproof aluminum enclosure Top panel is milled and anodized with nonerasable nomenclature Bottom painted LCD window is acrylic Weight 2 25 lb 1 kg with batteries External controls 4 pushbuttons Power Mode and A Power button when held down for 5 seconds resets the microprocessor Internal controls 1 push button for
33. a specific use This takes a small amount of understanding and time 3 Use Custom Settings menu and configure the instrument to your exact liking This is the hardest way of programming and takes some understanding of the instrument as well as some time It will result in an instrument tailored to your application orto your specifications 4 Usea Combination ofthe above Use a Preset Instrument Menu but then customize it to meet your needs You won t have to program all the variables but will still be able to customize itto your needs Instrument and Detector Variables The Setup Menus will change the variables inside the instrument These variables control the function of the instrument There are several types 1 Variables that change the instrument rather than the detector and are considered part of the instrument For example the beeper on off the full scale bargraph and the button definitions 2 Variables that change with Detector 1 2 or3 These fall into two groups 1 Those that change with the Mode such as the Calibration the Units the Timebase and the Bargraph type Health Physics Instruments 2 Those that do not change with the Mode and are considered part of the detector Examples are the High Voltage The Discriminator and the Deadtime Internal Timebase The Cypher has two choices for an internal timebase CPM Counts Per Minute or CPS Counts Per Second This changes the basic units that the instrum
34. ameters when adding a new detector or changing an existing detector The two modes function exactly the same except that the Calibration Mode sets only the Calibration Factor Exponent and the Deadtime while the Detector Setup Mode sets the Calibration Factor Exponent Deadtime in out Deadtime High Voltage Saturation Window in out Window Discriminator Gain Range High Limit Range Low Limit Units Prefix and Timebase The Calibration and the Detector Setup Menus will change the parameters specific to the instrument and to the detector Some ofthe variables are specific to the instrument and detector and some are specific to only the detector Changing the Range High Limit will change the values for the selected Mode for that detector If the current mode is the Rate Mode and detector 1 is the current detector then only the Rate mode for detector 1 will be changed Likewise changing the high voltage while detector 1 is selected will change the high voltage only on detector 1 The Calibration Factor Exponent Range Hi and Low Limit Units Prefix and Timebase are all Mode and Detector specific The High Voltage Deadtime Saturation Window Discriminator and Gain are only detector specific and will not change with mode The following describes how to enter into the Calibration Mode orthe Detector Setup Mode using the Calibration and Detector Setup Menus 1 Tum on the instrument with the MODE button pushed down If this does not res
35. aracter User Units and Timebase 3rd character User Units and Timebase 4th character User Units and Timebase 5th character Calibration number for Hiah Voltaae Preset to 94 User character at turn on displav 1st diait User character at turn on displav 2nd diait User character at turn on displav 3rd diait User character at turn on displav 4th diait Location Location Location Description Det 1 Det 2 Det 3 Mode Lockout Determines which modes in 48 112 176 Cal High Part of Calibrate Number Digit a us i Callow Ts Part of Calibrate Number Diait __ 50 Exponent J Exponent 31 us Ji f Pe Base 52 Jio nits Base Units 53 181 Timebase Base Timebase 54 18 182 isn Tvoe DisplavTvoe Where D pointis pp ao 183 Bara Bararanh Tvoe 56 120 Jia RanaelLolimi Limitforranainadown 57 21 186 RanaeHiLimit Limitforranaingun p 122 186 Timetoranaeun 59 2233 i8 Range Dntime Timetoranaedown o 124 18 jJ Constant TimeConstant 61 125 189 DisolavConfa Confiaure the Disnlav 63 x 27 Caltow Part of Calibrate Number Diait _ 64 228 192 Exnonent X txonent j 65 31129 Jio X pe BasePrefx 5 35 5 o6 Jl i13 1 nit
36. before programming the Cypher We recommend changing the Calibration Factor and Exponent of only the rate and integrate ranges The Calibration of the CPM S range can be changed but it may be confusing to a user and difficult in calibration However it may be changed if necessary The scaler does nothave a calibration In the following descriptions we will use a GM Pancake Detector as an example 1 Basic Detector Information a Detector 1 2 or 3 The Cypher can change between detector 1 2 or 3 This is done using the Function Menus or through one of the Quick keys The Detector that is in use or selected is the detector whose variables will be changed If there is no DET function in the Function Menus or DET Quick key then there is only one detector detector 1 b CPM or CPS Internal Timebase Tum the instrument on and look at the first word on the display If itis HPI then the instrument has the internal timebase setto CPM If itis HPls then the internal timebase is in CPS To change the timebase see the section on Programming Internal Timebase When shipped from the factory the timebase is in CPM In general the CPM internal timebase is used for conventional units and the CPS internal timebase is used for SI units c Detector Sensitivity Obtain the sensitivity of the detector from the specification sheet The example detector has a sensitivity of 2100 CPM mR h d Deadtime The Deadtime value should be listed in the detector specif
37. button MODEL 5000 CYPHER Health Physics Instruments 5 Inthe Integrate Range the softbuttons are already in use Pushing MODE repeatedly will show the three factors followed by the normal Function Menus These factors are adjusted just like the ones in the CPM and Rate Modes 6 There are 3 adjustments to be made the Calibration Factor the Exponent and the Deadtime The Calibration Factor and Exponent form a number that determines the value on the display They should be thought of as one number in exponential form Changing the Calibration Factor and Exponent changes the value on the display at all doserates Increasing the number will increase all the readings in that Mode Decreasing it will decrease the reading The Deadtime corrects for deadtime losses that occur in all pulsed detectors If the Deadtime is turned on then the Deadtime number will effect the readings at high count rates At low count rates the change is insignificant 0 mR h 1000 FACTOR 1 00 4 1 CALIBRATE DISPLAY Calibration Exponent And Deadtime Factors The Calibration Exponent and Deadtime Factors are all used in the Calibration of the instrument The Calibration and Exponent are in reality one number This number is used to increase and decrease the value ofthe calibration If the calibration is 1096 too low then it is necessary to increase the Calibration Factor 10 The combination of Calibration Factor and Exponent are in reality a number i
38. chart of Function Menu Definitions chart and then change one of the locations You will change it to an 8 which is the detector selector Incidentally you probably are not using all three Function Menus and your choice will be either to change one of the existing softbuttons to this function or to add it to a new Function Menu by adding a Function Menu to location 24 25 or 26 Q Is the Cypher available in different languages A It currently is available only in English However if you purchase the Operation and Maintenance Manual it includes a list of the words that are used in the Cypher If you write the words and abbreviations that you want in the table provided we will change the program There is a small fee for this service Q I need 2 different scales for the bargraph How do I do it A The bargraph can be on the top orthe bottom line Use one range with the top line and one with the bottom line You will find it under Display Configuration Make sure the scales are in place on top of the LCD Q Why are there more Log printed bargraph scales than normal scales A The log bargraph scales can start with any decade that is why there are so many Incidentally the log scale also can be configured in 2 ways The scale can be though of as only the units orthe units with the prefix Most of the supplied bargraph scales do not use the prefix for their value When l use the highest CPM S range and the reading is about mid scal
39. d the Rate Mode range in the same range thus keeping it from going up or down a range It is useful when surveying for low count rates when you do not want to wait for the instrument to range up to a higher range for a hot spot A small will appear on the top right hand side of the display indicating the Range Hold is in effect The choices for the Range Hold are OFF Range Hold is turned off F HLD Range Hold is turned on and the instrument will not range up or down a range The in the display tums on TC Time Constant The Time constant controls how fast the bargraph will move to a new value and how fastthe digital display will home in on a new value It does not work in the Integrate or Scaler Modes The instrument automatically adjusts the time constant depending on the level of the radiation It is slow on low rates and fast on high rates The Time Constant setting modifies these automatic setting to be slower or faster The choices for the Time Constant are SLO The Time Constantis slow MED The Time Constant is medium FST The Time Constant is fast MOD Mode The mode controls which mode the instrument is operating in The previous section describes each mode in detail The choices are CPM This is the CPM Mode RTE This is the Rate Mode INT This is the Integrate Mode SCL This is the Scaler Mode USR User Mode not factory installed Health Physics Instruments LCD Liquid Crystal Display Contrast Setti
40. d the display is frozen When it is reset the integrated value is reset and the time is preset The time can work both as a timer or as an integration timer If the time is set to 0 then the timer will count up If itis setto some value other than zero then it will count down When it gets to zero it will stop the instrument and beep if the beeper is turned on If the battery is low the word LBAT will flash on the top right of the display every 12 seconds 0 nR RESET 00 01 00 TME INT INTEGRATE RANGE Scaler The scaler display shows the counts and current status of the instrument on the top line On the bottom line it shows the time and the function of the two right hand keys The TME softbutton will set the time and the A button controls the status The Quick keys are disabled in this mode Repeatedly pushing the A button will cycle through run RUN stop STP and reset RST When the instrument is running the numeric value and the time will update ten times a second When it is stopped the display is frozen When it is reset the counts and the time are reset The time can work both as a timer or as a clock If the time is set to 0 then the timer will count up If itis setto some value other than zero then it will count down When it gets to zero it will stop the instrument and beep ifthe beeper is turned on If the battery is low the word LBAT will flash on the top right of the display every 12 seconds 00000000 RESET 00 01
41. de of the LCD at turn on See the ASCII table under User below for the setting of the character Power User 1 is the left hand character as fp 1 fem 8 Mm _ 1 omo n P pet s mmi iz ja s a 29 Range Hi Lo Limits This sets the limits of the display both upper and lower limits Ithas the value from 119 to 136 with 128 in the center Set this to keep the detector from being too sensitive and to keep it from going into a high scale that may not be usable because of saturation or excessive deadtime losses Set Range Hi to one value higher than you want to use Range Lo to the actual range you want to use RANGE HI LO TABLE Center is the point of calculation for the calibration Higher means the ranges with more counts Lower means the ranges with fewer counts Table values assuming type 1 Display Range decade Range decade ES XXX Center 129 130 131 134 135 136 30 Range Up Dn Time This is the number of seconds that it takes the rate ranges to change ranges The value set is the number of seconds It is normally set to 0 Setting the Up Time to 3 for example will delay moving up a range for 3 seconds 31 Saturation This is useful to check if the detector is in saturation or drawing too much current It should be set interactively with the detector under the Setup Menu Its range is from 0 to 255 If itis set too high it could cause the instrum
42. e it then jumps off scale can t get it to read at the top end of the scale Why not A There are 2 reasons for jumping off scale If the instrument thinks that the detector is in saturation or if the instrument thinks that there are too many counts for the detector it will make it go off scale Check the saturation setting it may be too high The instrument uses the deadtime setting to calculate how high it should go before showing off scale It does this even though the deadtime is turned off To show all the counts with no limits setthe saturation and deadtime to 0 This will turn them both off MODEL 5000 CYPHER Health Physics Instruments 33 APPENDIX A WORKSHEET DETECTOR SETUP Detector Name Detector Serial Number 1b Internal Timebase O O CPS 1d deadtime RATE RANGE 2a Units Setting 2c Timebase Setting 2d1 Calculate CPM S per prefix units timebase 2d2 Recriprocal of step 2d1 Calibration Factor 2e1 Max Level 2e2 Max Level in display 2f Max Range Range Hi Limit Min Range Range Lo Limit INTEGRATE RANGE 3a Prefix Setting Same as Rate YES L NO If yes Cal Factor x 60 CPM or 3600 CPS 3b Calibration Factor OVERALL DETECTOR SETTINGS 4a High Voltage 4b Discriminator 4c Gain 4d Saturation 4e Window Detector Type la Det willbe DET1 DET2 DET3 1 Sensitivity i e CPM mR h 2b Prefix Setting Exponent Units Setting If no use step 3b directly put value bel
43. e it will range down The numeric display shows a maximum of 3 significant figures C The bargraph full scale figure on the top right indicates the full scale of the bargraph If it displays 1000 and the units are KCPM then full scale is 1000 KCPM The minor divisions would then be 800 600 400 and 200 KCPM If there is a small H to the left of the bargraph full scale figure then the scale is on Range Hold Consult the Function Menu for changing Range Hold If the battery is low the word LBAT will flash on the top right of the display every 12 seconds CPM 1000 CPM RANGE mR h 1000 RATE RANGE 1 Overrange If the rate value is too high it will show gt gt gt in the display It will show dashes if the rate display is over its range and waiting to change ranges The bargraph will D also show when it reaches the right hand end of the display gt gt gt mR h 1000 OVERRANGE INDICATION Integrate The integrate display shows the numeric level and current status of the instrument on the top line On the bottom line it shows the time and the function Health Physics Instruments of the two right hand keys The TME softbutton will set the time and the A button controls the status The Quick keys are disabled in this mode Repeatedly pushing the A button will cycle through integrate INT stop STP and reset RST When the instrument is running the numeric value and the time will update every second When it is stoppe
44. ealth Physics Instruments Ill Quick Start This section is a quick review of how to operate the instrument and how to change menus modes and functions Each one is discussed in detail in the individual sections This section assumes that the instrument is programmed with the factory settings Turn the instrument on and off by pushing the POWER button The normal operation starts after the first 2 menus The button turns the light on and off The A button tums the beeper on and off Try both of them You will have to shield the display from room light to see the backlight but it is very visible in the dark If the display does not have a bargraph on the bottom line push MODE to display the first Function Menu Then repeatedly push the MOD softbutton really the A button until CPM is on the line above MOD Then push the NXT softbutton twice The display should now show CPM on the top line and have a bargraph on the bottom line Next switch to the Rate Mode to see what it will look like Push MODE to display the first Function Menu Then repeatedly push the MOD softbutton until RTE is on the line above MOD Then push the NXT softbutton twice This is the Rate Mode It has radiation units and a bargraph just like the CPM mode Now lets try the Scaler Mode Push MODE to display the first Function Menu Then repeatedly push the MOD softbutton until SCL is on the line above MOD Then push the NXT softbutton twice This is the Scaler Mode Pus
45. ent works in internally It actually calculates the values in 1 CPS or 01 CPM If itis setto CPM and then programmed with the Instrument Setup Detector Setup or Factory Setup menus the instrument will be in conventional units and the rate range will probably read in mR h If itis setto CPS and then programmed with one of the 3 Setup menus the instrument will be in SI units The CPM or CPS range has its own calibration and can be programmed in any units desired Itis designed to be used with CPM S and that is the nomenclature in the Function Menu Ifthe instrument is in CPM and the Calibration Factor and Units for that range are changed to read in CPS instead of CPM then the reading will not be exactly correct The Calibration Factor has only 3 places of accuracy Thus 100 CPS may read only 99 CPS One of the choices with the MOD softbutton in the Function Menu during normal operation is CPM If you wantthis to be CPS then you must choose the CPS internal timebase If you want itto be CPM then you must choose the CPM internal timebase Changing this will also change the calibration of the Rate Range the Integrate Range and the User Range This is because these rely on the internal timebase for their calculations to make the CPM or CPS range read correctly There are several reasons to choose CPM or CPS 1 make the MOD softbutton selection of CPM or CPS 2 To calibrate the Rate Integrate and User Ranges in units of CPM or CPS 3 T
46. ent memory for minimum of 40 years Batteries not required for storage Operational E Modes 5 modes available not all need be used Rate Integrate CPM or CPS Scaler and a user defined rate mode Rate Integrate CPM and User mode all have separate calibration Calibration setup and maintenance mode also available All except User are standard on delivery Units rem rad R Gy Sv Bq dis cts CPM CPS Time base s m h Prefix f p n u m K M G T and none One 6 letter user defined unit timebase that may be setto any 6 alphanumeric characters Health Physics Instruments User defined keys and are user defined soft keys for each mode Power and Mode buttons are also used as soft keys for some functions Menu selection Simple to operate Single level menus Mode button will access all normal modes quickly and easily Rate mode Shows numeric value of rate with user selected units and timebase Updated every second Prefix automatically selected but may be preprogrammed Limited to 3 significant digits Autoranging w range hold Bargraph also displayed if desired CPM CPS mode Same as rate mode except units are CPM or CPS May also be programmed as cnts m or cnts s Integrate mode Shows Integrated dose or counts in user configured units Also shows integration time Scaler mode Shows counts up to 6 digits Count time variable from 1 sec to 99 hours or continuous with timer Beeps when timed out if beeper turned on
47. ent to read off scale on all ranges with no detector 32 Stats This controls the beeper status Itis normally set and adjusted by the BUZ Softbutton depending on the Mode The loud soft adjustment also effects the Quick key when itis set to beeper on off Set the loud soft correctly if you want the Quick key to be soft or loud and you have no BUZ softbutton Set this if you have no BUZ softbutton STATS TABLE MODEL 5000 CYPHER Health Physics Instruments Seting Beeper Volume Beeper volume Int Scaler iu BS oft soft oft sof sr si Uu E 0 soft 0 ou ou ou Ped m m e ELI cL ou ou ou oud m w X m N o 6 8 9 10 u 122 B 15 m 33 Time Constant This sets the speed of the bargraph and the rate of change of the display It is also setby the TC softbutton TIME CONSTANT Time Constant 2 sw _ 34 Time Int This is the setting of the time for the time in the integrate range Itis set by the integrate range Time Intl is the MSB of a 3 byte HEX number Each portion of the number is presented in decimal The 3 byte number is the number of seconds that are in the display It is preset to 60 which makes the display turn on with 60 seconds or 1 minute There would normally be no reason to change this setting 35 Time Scl This is the setting of the time for
48. grate Range the softbuttons are already in use with controlling the display Pushing MODE repeatedly will show the factors followed by the normal Function Menus These factors are adjusted just like the ones in the CPM and Rate Modes After changing the items to the values that you want you can either turn the instrument off or select Norm Operation from the choice of setup menu items 19 MODEL 5000 CYPHER XIV Preset Instrument Menu The Preset Instrument is used to setup the instrument notthe detector for specific applications or uses It is provided as a quick method to setup the instrument We expectthat most people will continue to use the factory settings however we also offer these choices Settings 1 Standard This is the same settings as those received from the factory It will provide the most usable functions for only 1 detector 2 Rate Only This is for use as a survey meter to measure Dose Rate It only functions in that mode and is a minimum instrument It needs little or no operator training because it only displays dose rate Its normal use would be with a gamma probe 3 CPM Only This is used as a contamination meter It only functions in that mode and is a minimum instrument It needs little or no operator training because it only displays CPM Its normal use would be with a pancake GM detector 4 Contamination This is intended as a contamination meter for those with some radiation training It has
49. h the RUN softbutton to start it running Push it again to stop and again to reset You change the time by pushing the softbutton TME The and T softbuttons change the time the RST softbutton resets the time to zero Push the OK Softbutton when the time is what you want The Integrate Mode is accessed in the same way as the other modes The Function Menus offers other choices besides changing the Mode Pushing MODE shows the first Function Menu The choices here are RH or Range Hold on and off TC or Time Constant fast medium and slow and of course the MOD or Mode for CPM rate integrate and scaler The second Function Menu is reached by pushing the NXT softbutton Ithas Set LCD for changing the LCD contrast Light on off and timed and Buzzer on off or soft This concludes the section on Quick Start See the sections that follow for a detailed description on all the functions available on the Cypher IV User Interface The Cypher has only 4 controls on the front panel They reduce the complexity on the front panel and through the use of menus control the operation of the instrument Buttons There are 4 momentary buttons on the front panel Push the POWER button to turn the instrument on and push it again to turn it off The two buttons on the right side marked A and are Quick keys they will quickly do a preprogrammed function The A button is the light on off and the button is the beeper on off The MODE button accesse
50. hould be set to the region of interest This is usually set with a check source The discriminator can be set from 0 to 255 The window can be set from 0 to 255 The range of the pulses is from 0 to 100 Adjust the window to the desired height then move it up or down using the discriminator The window is always above the discriminator Once it is adjusted it can be turned on or off without changing the window setting 5 Other variables and settings The bargraph type display type inverted or normal display modes for each detector and range up and down times can be reviewed under the Custom Settings section 6 Programming the Setup Value The values on the worksheet may be programmed into the instrument in either of 2 ways The first and easiest way is to use the Detector Setup Menu This is an interactive mode that shows the count rate as well as the settings for each ofthe above items The other way is to use the Custom Settings Menu which allows programming into the locations in EEPROM This is more complicated and involves looking up the locations of each item in the list We recommend using the Detector Setup Menu Remember that the Detector that is selected using the Function Menu will be the detector whose parameters you are saving or changing See the individual Sections on how to use these Menus If you have problems with the programming and the instrumentis functioning in an unpredictable manor you can revert back to the fact
51. ication sheet Note this value on the worksheet The Example GM detector has a deadtime of 100 or 100 x 10 Sec 12 2 Rate Ranges a Units Determine the rate units that you want the instrument to operate in The choices are cnt REM rad R Sv Gy dis CPM CPS or User programmed This is the basic unit and does not include the prefix such as m or u For example the basic unit of a pancake GM detector is R and not mR It could also be in rad Note the units in the space provided on the worksheet and also the corresponding number from the table on the worksheet b Prefix Determine the prefix for the main rate range ofthe instrument If you wantthe instrument to work in uR h then the basic units would be u This assumes that the detector works in that range Don t try to set the instrument to read in R h when the basic units should be uR h For example the Pancake GM detector would want to read in mR h uR h would result in the display being too large a number and R would result in it being too small a number Note the prefix and the corresponding number from the table in the worksheet c Timebase Select the timebase of h m or s If you need another timebase use the User setting under Units Note the timebase and the corresponding number from the table in the worksheet d Calibration Factor and Exponent 1 If the internal time base is set to CPM then determine the CPM prefix units timebase For example for a
52. is menu Also see the section on Calibration to understand the settings It is used to change the following Calibration Factor Exponent and Deadtime 2 Detector Setup 2 This is the menu to change both the calibration of the instrument and the setup of the detector Please see the section on Detector Setup Menu for a complete description of this menu It is used to change the following Calibration Factor Exponent Deadtime in out Deadtime High Voltage Saturation Window in out Window Discriminator Gain Range High Limit Range Low Limit Units Prefix and Timebase 3 Preset Instrument 3 This is the menu to preset the instrument parameters Please see the section on Preset Instrument Settings for a complete description of this menu The choices are selected for various needs or jobs The list is Standard Only Rate Only CPM S Contamination Surveyor Technician Laboratory Medical Professional and All These change the look of the display time constant count time power on time function menus and the softbuttons 4 Preset Detector 4 This is the menu to preset the detector parameters Please see the section on Preset Detector Settings for a complete description of this menu The choices are selected for various detector types These change the beeper divide gain discriminator window deadtime high voltage saturation and window in out 5 Custom Settings 5 This is the menu to change individual memory locatio
53. libration Mode The following instructions will show the necessary steps SIDE VIEW CAL BUTTON J 1 on the instrument with the MODE button pushed down If this does not result in the words Calibration 1 in the display then the Front Panel Calibration Adjust has been disabled and it is necessary to use the internal one Open the case and push down on the CAL push button top right hand side of the circuit board under the display while turning the instrument on The words Calibration 1 should be on the 2 Push the OK softbutton and the Cypher will resume normal operation with the radiation value on the top line and the calibration factor on the bottom ine 3 The softbuttons change the numeric value in the bottom line of the display The lt Softbutton will move the cursor over 1 place and the T softbutton will increase the value of the number positioned over cursor Using the two buttons you can change the value of the displayed item in the bottom line The value in the top line will change along with the changes in the bottom ine 4 In the Rate and CPM modes the item on the bottom line be changed by pushing MODE then the 1 or T softbuttons until the item description is what you want to change or do Then push the MODE button to return to the calibration If you do not push the J or T softbuttons the normal function menus will be displayed when you push the MODE
54. lowing settings are not enabled when the instrument is set at the factory See b the section on Custom Settings Mode G MODEL 5000 CYPHER WIN Window This controls the window in and out If the window is in then the instrument is a single channel analyzer If the window is out then the instrument will count pulses that are above the discriminator The choices are OUT The window is out IN The window is in This is set for each detector and each detector has its own window in out setting DTM Deadtime Deadtime correction is used to compensate for the loss of counts at high count rates The actual deadtime calibration and constant is set in the instrument at the time of calibration The choices are IN This mode has deadtime correction OUT This mode has no deadtime correction The deadtime correction is turned on and off independently for each mode DET Detector The instrument will accept 3 detectors This controls which set of detector constants are in effect This effects the calibration high voltage deadtime display etc The choices are 1 Use the constants for Detector 1 2 Use the constants for Detector 2 3 Use the constants for Detector 3 The instrument will prompt the user to remove the old detector and to install the new detector HLD Hold This puts the instrument on hold HOLD is displayed on the top right hand corner of the display The numeric number is held but the bargraph continues to function The ch
55. may also be due to weak batteries The instrument will automatically turn off whenever the batteries are too weak to power the instrument If the instrument detects a fault in the memory it will show FAILURE 1 in the display If this occurs see the section on Maintenance The turn off display shows the hours remaining on the batteries If the instrument has less than 8 hours it will beep three times to indicate that the batteries should be changed Emergency Reset And Contrast If the batteries are good and the instrument will not turn on itis possible that the instrument is actually tuming on but the contrast is settoo light or dark To do an emergency contrast setting turn the instrument on while holding down the A button Wait 2 seconds then release the button Then hold down the A button if the display is too light If the display is too dark then hold down the button Continue to hold the button down until the display shows a normal contrast and the contrast menu Then push the NXT softbutton to resume normal operation The instrument can be reset by holding down the POWER button for 10 seconds or until the display blanks then releasing it This is a cold start for the microprocessor It will reset the instrument which should then show the on display This can be done at any time to reset the instrument Quick Keys The Quick keys are the button and the A button Their use is shown on the second startup display They perf
56. n scientific notation A Calibration Factor of 6 35 and an exponent of 2 is in scientific notation 6 35 x 102 The Calibration Factor should be set in the range of 1 00 to 9 99 Raise and lower the exponent to compensate if itis necessary to go beyond these limits For Example if the Calibration Factor is 9 5 and the Exponent is 3 then an increase of 10 would be 9 5 x 1 1 10 45 This is notin the range of 1 00 to 9 99 so decrease the Calibration Factor by 10 and add one to the exponent which would be 1 04 with an exponent of 4 The same is true of the other direction If the Calibration Factor is 1 24 and the Exponent is 3 and it is necessary to decrease it by 3096 then 1 24 would be reduced to 868 This is below 1 00 so decrease the exponent by 1 to 2 and increase the Calibration Factor by 10 to 8 68 The range of the Exponent is from 40 to 40 In reality it should never be necessary to set it over the range of 8 to 8 The deadtime is in units of microseconds It should be close to the value specified by the manufacturer of the detector Its value is from 0 to 999 uS It will be adjusted during the calibration 10 MODEL 5000 CYPHER Detectors Each detector will have to be checked in all modes for proper operation To change detectors Select the detector you want to calibrate from the DET function in the Function Menu From normal operation push MODE then the 1 or T softbuttons until DET F is displayed then push the DET softbu
57. n out and Gain This is an interactive adjustment that is made while 2 looking atthe count rate Health Physics Instruments 1 Turning Adjust On And Off Adjust is turned on and off in the Setup Menu and is under Front Panel 7 t has 2 choices the first is for all modes and the second is for just the scaler mode 2 Using Adjust The display has the function name in the upper left hand the value of the function in the center of the display and the count rate display in the upper right The Count rate display is the number of counts in 0 1 second The NXT softbutton changes to the next function and the J and T softbuttons will increment or decrement the value of the function Hold them down until the function is at the desired level The Mode button will return to normal operation HV or High voltage will change the High Voltage The display number will bounce about 30 volts Be careful notto increase the high voltage above the limit of the detector DISCR or Discriminator is the setting for the discriminator It can be set from 0 to 255 butis linear from 0 to 100 WIN or Window is the setting for the window It can be set from 0 to 255 GAIN is the setting for the gain It can be set to 0 1 or 2 0 is the lowest gain and is used for GM detectors 2 is the highest gain and is used for scintillators WINDOW IN or OUT controls the action of the window If it is set to IN then the instrument is working as a single channel analyzer
58. ng The LCD controls the contrast of the display There is only one choice and it is SET Pushing it will change to a new display The best setting is as dark as possible before the squares show The choices of this menu are LT To lighten push and hold down DK To darken push and hold down NXT When the contrast is correct push this button LTE Backlight on the display This controls the backlight on the display The backlight is not very visible in daylight but is very visible in low light The choices are OFF The backlight is off TME The backlight is timed This turns the backlighton for 25 seconds After the 25 seconds it will automatically turn itself off The time is stopped when in the Function Menus ON This will tum on the backlight until it is turned off BUZ Beeper Control This controls the beeper The beeper has 2 functions In the CPM Mode or Rate Mode the beeper will if turned on beep on every input pulse In the Integrate Mode or Scaler Mode the beeper will if turned on beep when the timer counts down to zero to signal that the counting is finished The choices are OFF The beeper is off SFT The beeper is turned on and the loudness is soft ON The beeper is turned on and the loudness is set to the highest level If the beeper is setto SFT then thatis the loudness forthe beeper The front panel Softkey used for beeper on off will only turn the beeper on to the loudness set in the Function Menu The fol
59. ns in the EEPROM that in turn program the instrument All of the instrument variables are stored in the EEPROM This menu allows complete access to all the possible changes and setups in the instrument It allows you to change everything changeable about the instrument Please see the section on Custom Settings for a complete description of this menu 6 CPM CPS Si 6 This is the menu to change the internal timebase from CPM to CPS It also changes the front panel Level 1 Function Menu MOD softbutton selection from CPM to CPS Internally the instrument calculates the basic rates from counts per minute or counts per second This control changes that setting If this setting is in CPS then any presets for Preset Instrument or Preset Detector will be in SI units 17 If you want CPM answer yes to the question Timebase For more contrast user characters and current mode to start the instrument operation off information see the section on Programming Internal Timebase properly See the section on Factory Settings in Maintenance 7 Front Panel 7 The Calibration and Setup Menus can be reached through the front panel or internally This menu changes the access from the front panel It also turns on and off the Adjust Menu forthe Quick keys The choices are Front panel on off Adjust on off for all modes orfor justthe scaler See the Operational section for more information on Adjust If you want to be able to calibrate the instrument fr
60. ntenance Mode This mode is useful for checking the operation of the instrument when it is needed for repair Each item is used for checking some part of the instrument Please refer to the Operation and Repair Manual for more information If you do decide to change the settings with this menu remember to disconnect the detector in case the high voltage changes This mode does not change any stored value Failure in Display If the display says FAILURE then the EEPROM has failed This may mean that is it corrupted or that itis not working In any case you should try to reprogram it which may preserve many of the settings 1 the instrument on after the display shows Failure 1 push the internal CAL button on the main circuit board under the right hand side of the display The display will change to the Setup Menu 2 Advance the menus using the T or 4 softbutton until the displays shows the Custom Set 5 Then push OK Push the POWER button to change the cursor to the Data Use the and T softbuttons to change the Data to 26 Then push the POWER button then the MODE button twice 3 If the display shows a normal turn on then the EEPROM was only corrupted a little and it would be wise to check the calibration and operation of the Health Physics Instruments instrument If it shows a Failure 1 then the EEPROM is defective and should be replaced Installing a New EEPROM When installing a new EEPROM itis necessary to pr
61. oSetthe Preset Detector Menus to work in Conventional or SI units 4 Set the Preset Instrument Menus to work in Conventional or 51 units 5 To make the CPM or CPS range read correctly with a Calibration of 1 00 To change the internal timebase use the Setup Menu item CPM CPS SI 6 see the section on Setup Menus form more information 16 MODEL 5000 CYPHER XII Setup Menus The Setup Menus are special menus that are different than the normal operation of the instrument These menus allow adjustment and setting of all the variables in the instrument These include for example the button definitions the calibration values the operating displays the detector settings and the defaults Accessing The Setup Menus These menus are not available in any of the normal operating modes There are 2 ways to enter into the Setup Menus The first method which is always available is to push a switch on the inside of the case The second method is through the front panel but it may be user disabled The two methods are 1 METHOD 1 INTERNAL BUTTON 1 instrumentis on turn it off 2 Remove the bottom of the case by twisting the Twist Lock fasteners counter clockwise 3 Next to the right hand side of the display on the main circuit board is a small push button marked CAL Hold down this button while you are turning on the instrument The display should show the first Setup Menu CAL BUTTON 2 METHOD 2
62. ogram it to the default values It will show Failure 1 in the display until itis programmed 1 Turn the instrument on after the display shows Failure 1 push the internal CAL button on the main circuit board under the right hand side of the display The display will change to the Setup Menu 2 Advance the menus using the T or J softbutton until the display shows the Factory Set 12 Then push OK answer the question on CPM or CPS and then Yes to Are you sure It will take 30 seconds to program the entire EEPROM 3 After itis done programming push the Mode button to resume normal operation 4 Check the new EEPROM by turning the instrument on and off If it turns on without the failure warning then it has been programmed 5 The instrument will now need to be completely recalibrated Factory Settings To program the instrument with the factory settings 1 Tum on the instrument with the MODE button pushed down If this does not result in the words Calibration 1 in the display then the Front Panel Calibration Adjust has been disabled and it is necessary to use the internal one open the case and push down on the CAL push button top right hand side of the circuit board under the display while turning the instrument on The words Calibration 1 should be on the display 2 Advance the menus using the T or J softbutton until the display shows the Factory Set 12 Then push OK answer the question on CPM or CPS and then Yes to A
63. oices are ON Freezes the numeric display OFF Normal operation DIV Divider for Beeper The counts from the detector can be divided by 1 8 64 or 2048 before they are sent to the beeper This is useful where the beeper may otherwise be saturated or sound like it is on continuously The choices are 1 Counts 8 Counts 64 Counts 2K Counts Health Physics Instruments CAL Calibrate Mode This mode is used to put the instrument into the Calibrate Mode See the section on Calibrate Mode for more information The choices are OFF Normal operation ON Instrument in Calibrate Mode MODEL 5000 CYPHER VIII Operational Detector Connection The detector is connected to the instrument through the BNC located on the end of the handle This location puts the cord out of the way so it will not interfere with the operation ofthe instrument You may change the detectors without turning the power off however it is usually a good idea to do so Alternate connectors may be installed LOW BATTERY When the battery is low and has less than 8 hours remaining the word LBAT flashes in the upper right hand corner It flashes every 12 seconds It does not flash in the Function Menus Battery Change When the batteries are too low as indicated on the tum on menu or the turn off menu then it is time to change them The instrument uses 6 type AA penlight ANSI L40 IEC LR6 cells These can be any type of battery except lithium If you want to
64. om the front panel push yes If you wantto be able to access the Adjust from all modes then push yes to the next question and if you want to adjust only in the scaler mode push yes to the next question and no to the previous question 8 Automatic Turn Off 8 The instrument has the capability to automatically turn itself off if it is not in use This menu turns that capability on and off If you want the instrument to automatically turn off then push yes This will automatically turn it off after the time that is programmed into the instrument The default value is 108 minutes See and power time in Custom Setting section for more information on setting the value 9 High Voltage Calibrate 9 The high voltage is displayed in several menus This is a measured high voltage This menu adjusts the calibration of the high voltage measurement so the value will be displayed correctly It does notchange the value of the high voltage See the section on Maintenance for more information 10 High Voltage Setting 10 This menu will adjustthe setting of the high voltage It allows you to preset the value of the high voltage for a particular detector without having to go into any other Menu The top line of the display shows after the HV the actual measured value of the high voltage The number after the Fac is the high voltage factor which is a number that the instrument uses to set the high voltage It is also the number that is put into the memo
65. or is to read in mR then do this in 2 steps First calculate the counts mR 2100 Counts Min mR h x 60 min hr 126 000 counts mR Then calculate the mR counts by taking the reciprocal 1 126 000 000 007 93 or 7 93 x 10 7 93 x 10 is the Calibration Factor and Exponent 7 93 is the Calibration Factor and 6 is the Exponent Mark the Units Prefix Calibration Factor and Exponent on the worksheet c Range High and Low Limits Setthe Range High to 8 Setthe Range Low to 4 This range will usually be low enough to change with the first few counts If you want it to be less sensitive then change to 3 or 2 4 Overall Detector Settings The Detector needs its own settings of High Voltage Discriminator Gain and Saturation to function a High Voltage The High voltage is usually set by either using the recommended voltage from the manufacturer or by plotting the plateau Either method will work To plotthe plateau 1 Expose the detector a fixed geometry to a medium intensity radiation source 14 2 Slowly raise the high voltage until the detector begins to count You may need to adjust the discriminator before this step 3 Raise the high voltage in uniform steps of 50 volts At each step note the radiation intensity on the CPM S range Do not go above the maximum voltage for the detector 4 Plotthe High voltage vs counts on a graph Adjust the high voltage in the instrument to the value that corres
66. orm their function quickly without a menu The Quick key is the light button It is an alternate action button and will turn the light on if itis off and off if itis on The light unless turned on by the Function Menus is timed and will automatically turn off in 25 4 seconds The A Quick key is the beeper button It is an alternate action button and will turn on the beeper if itis off and off if itis on The loudness of the beeper is determined by the beeper selection in the Function Menus MODEL 5000 CYPHER Health Physics Instruments Digital Display Units Bargraph Scale 150 1000 Bargraph POWER MODE 7 A Printed C Bargraph Scale A QUICKEY POWER QUICKEY ON OFF MODE MODEL 5000 CYPHER VI Modes Below is a description of the different modes Change between the modes by using the MOD softbutton in the Function Menu Press MODE to view the first Function Menu CPM And Rate The CPM and rate display can be identified by the bargraph on the bottom line The top line shows the digital rate prefix units and timebase and the full scale of the bargraph The bargraph is on the bottom line and below that is the printed scale for the bargraph The bargraph pointer is updated ten times a second This makes it smooth and continuous The numeric display is updated every second The instrument autoranges when it goes past full scale it will range up and when it gets to 8096 of the lower scal
67. ory settings under the Setup Menu however the values for the previous calibration will be lost T Log Bargraph If you have a Log Bargraph the Range Low Limit sets the low end of the bargraph Setthe Range High Limit as you would if using a normal bargraph The with the log bargraph the digital display will change ranges at each decade 15 MODEL 5000 CYPHER Programming The following sections discuss programming the instrument Itis important to understand the setup ofthe instrument before actually performing it D Instrument and Detector Settings There are 2 basic kinds of settings in the Cypher The first is the Instrument Settings These are settings that effect the operation of the instrument This includes the display and the buttons The other type of setting is the Detector Setting These effectthe operation of the detector and include the calibration data high voltage setting and discriminator Programming the Cypher The Cypher is highly programmable There are many different items about its operation that can be changed There are 4 basic ways to program the instrument 1 Use the factory settings This is the simplest way The instrument is setup with all the important operating parameters and settings It takes no time and will handle most situations 2 Use a preset setting available from the Preset Instrument Menu This is a number of instrument types that are pre programmed It sets up the instrument for
68. ost settings are in minutes 00 01 00 SetTi me RST OK _ f SET TIME E User The User Mode is not turned on with the Factory Settings itis a special mode for users who want a rate mode in addition to the CPM S and mR h mSv h modes It is only a Rate Mode and cannot be used in the integrate mode or scaler mode The units that are in the display will probably be in those chosen by the User They can be any conventional unit or any 5 characters An example of this mode s use would be to display any special units that are not normally available See the section on Custom Settings for adding this function MODEL 5000 CYPHER Health Physics Instruments MODEL 5000 CYPHER VI Function Menus The Function Menus are the only way to change the operation of the instrument For example they allow you to darken the contrast of the LCD adjust the time constant and change the mode from CPM to Scaler There are only 2 Function Menus Push MODE from normal operation and the first Function Menu will be displayed Push MODE again and the second Function Menu will appear Push MODE again and you will be back to normal operation Pushing the MODE button repeatedly will always get you back to normal operation The following functions are in the Function Menus The first 6 of these are programmed in the Factory Settings as delivered the remaining may be enabled E using the Custom Settings Mode RH Range Hold Range hold will keep the CPM Mode an
69. ow Exponent Either Calculate or use Detector Setup Menu interactively Either way record value Program the above values using the Detector Setup Menu MODEL 5000 CYPHER Health Physics Instruments Use Tables below for determining the settings You will need both the setting and the value UNITS TABLE Setting rad Sv Pref ont 0 0 6 ad 0 0 0 0 8 R y Sv 10 user 1 thru 5 m olo gt amp PREFIX TABLE Setting Prefix K kilo f femto 1 8 M mega jp pco 0 9 GS aia T tera P none TIMEBASE TABLE Timebase O 1 mne Is Fill outthis table like the Example to determine the min and max range Remember the Maximum range is the range above the highest displayed DETECTO DISPLAY DISPLAY RANGE WITH EXAMPLE GM R SETUP FROM TO PREFIX UNITS Detector e o 7 5 3 2 1 1 2 3 4 5 6 7 8 pe Docs cl a 34 APPENDIX B SCHEMATICS
70. pancake detector that should read in mR h determine the CPM mR h This is 2100 CPM mR h If this number is below 1 CPM prefix units timebase or above 10 000 CPM prefix units timebase then think about changing the prefix up or down to compensate A detector with 50 000 CPM mR h has the prefix set too high It should be reduced to 50 CPM uR h in which case the prefix would be u If the internal time base is setto CPS then determine the CPS prefix base timebase units For example for a pancake detector that should read in wGy h determine the CPS uGy h which is 3 5 CP S uGylh If this number is below 0 01 CPS prefix units timebase or above 1000 CPM prefix units timebase then think about changing the prefix up or down to compensate Take the reciprocal of the number and convert to scientific notation For example 1 2100 0 000476 4 76 x 10 The formula is 1 sensitivity in prefix units timebase This is the calibration number In the example 4 76 is the Calibration Factor and 4 is the Exponent The range of the Exponent is from 10 to 10 If it is beyond this range change the prefix and recalculate the Calibration Factor and Exponent Note these values in the worksheet e Calculating the Maximum Level The Maximum Range is calculated from the maximum level that can be displayed with the detector which is determined by its deadtime MODEL 5000 CYPHER Health Physics Instruments 1 Calculate the maximum level CPM or CPS that
71. ponds to midway on the plateau If there is no upswing then adjust it above the knee SET HIGH 1000 VOLTAGE TO MIDPOINT COUNTS UPSWING amp 4 PLATEAU 0 0 1050 HIGH VOLTAGE GRAPH OF HIGH VOLTAGE VS COUNTS b Discriminator The Discriminator is set by lowering the value to the point where the instrument will count from noise then raising it past the point where it stops counting Check for double counting at low count rates Lower the gain or raise the discriminator to correct this problem The gain is set depending on the type of detector We recommend setting itto 0 for GM detectors and 1 or 2 for Scintillation and proportional detectors The gain can be setat 0 1 2 0 is the lowest gain and 2 is the highest Check the discriminator setting after changing the gain d Saturation The saturation detector is used to prevent a saturated detector from reading 0 on the display Set itto 0 to turn it off To adjust the setting in Detector Setup Mode 1 Reduce the Saturation to zero 2 Expose the detector to sufficient radiation so the reading is at the top ofthe highest scale 3 Raise the saturation until the reading shows off scale 4 Lowerthe saturation by 1096 MODEL 5000 CYPHER Health Physics Instruments e Window If the window is not used set itto 255 in case itis accidentally turned on If the window is to be used to turn the instrument into a Single Channel Analyzer it s
72. r 1 1 i i 3 i i Internal Pan Thin Thin 1x alpha Neutron Time cake wall end Nal Scin Pro base GM amp GM GM Scin tillator portinal setting Factory tillator 3 3 8 8 44 44 44 48 48 Pena 900 905 99 sy o 8 mac ma m Window ot out o fo 4 8 4 8 m 1 MODEL 5000 CYPHER Health Physics Instruments This makes it easier to increase or decrease values or to scroll through memory XVI Custom Settings Menu The Custom Settings is used to change the individual items in the instrument It can change any variable It programs by numbers and does not show the name of the variable It is necessary to refer to the tables below to determine the 6 location of the variable and the setting for that variable A description of the variables follows the tables 5 When you are finished push the POWER button to save the last change then push the MODE button to retum to the Main Setup Menu Itis a good idea to recalibrate or at least check the operation of the instrument to make sure you did not inadvertently change an important variable A Programming B To program the variable first determine the variable or variables that you want to change Locate the location of that variable in the following table then determine the value or setting of the variable from the section Description of Custom Locations of Variables
73. raph may confuse some people you can turn it off by setting the bargraph to off in Display Configuration in the Custom Setup Menu J ust read the current value look at the table and find out the current settings Then look for the same settings but with the bargraph off and change the data to the new value We also offer the choice of normal or inverted display with the bargraph on top This may be useful for some applications where you need 2 different bargraph scales perhaps one a log scale for mR h and one a linear scale for CPM The Range Up and Down Time allow the instrument to dwell on a range without going up or down a range quickly The Range Up Time would be useful for Health Physics Instruments contamination surveying near background where there are hot spots It would keep the range from going to the next higher range quickly It may be set to 2 or 3 seconds Likewise you may be using the detector in high radiation levels and not want it to range down during a momentary dip in radiation In this case increasing the Range Down Time would be useful Set both of these in the Custom Setting Menu Modes The modes can be turned on or off This allows the instrument to function in whatever capacity you want If you do not need a scaler or an integrate range turn them off using the Mode Lockout in the Custom Settings There is also a User Mode that can be programmed in any rate units you want Use the Mode Lockout in the Custom Setting
74. re to get all the counts Deadtime Correction The Factory settings turn on the deadtime correction only in the Rate Mode and the Integrate Mode It is turned off in the CPM S mode and the Scaler Mode IX Radiation Calibration The instrument is calibrated digitally There are no trimmers to adjust The values that adjust the calibration are stored in EEPROM memory for 40 years There are two adjustments for each detector that effect the calibration The instrument is adjusted by changing the calibration factor with exponent and the deadtime Only the Rate Mode and the Integrate Mode need to be calibrated however the CPM S Mode and the Scaler Mode should also be checked for proper operation The scaler should only be verified it has no calibration data associated with it except for deadtime which is turned off for this mode with the factory settings The first operation is to verify proper operation of the CPM modes and the Scaler Modes The second is to calibrate the Rate and Integrate Ranges A Changing The Display To Calibrate Mode The CPM Rate and Integrate ranges all have Calibration Factors and Exponents associated with them The scaler does not have a Calibration Factor The Calibration Factor for the CPM Range is usually setto 1 00 In addition there is a deadtime associated with the detector that if turned on corrects for deadtime losses in the detector In order to change these factors it is necessary to enter into the Ca
75. re you sure It will take 30 seconds to program the entire EEPROM 3 Afteritis done programming push the Mode button to resume normal operation 4 The instrument will now need to be completely recalibrated 32 XIX Questions amp Problems There are many questions and problems that can occur with the Cypher We recommend reading the pertaining sections to try to understand the instrument Most problems will occur because of incorrect programming Q I programmed the instrument using the custom settings and now l get gibberish on the display when cycle through the second screen of the Function Menu A The gibberish is a result of an improper programming choice in the Custom Settings If the choice is not among those that are in the tables then the instrument will choose a non existing choice and print gibberish on the display Look atthe numbers in locations 18 through 26 using the Custom Settings Menu The selections should be in the range from 0 to 12 Q I want to use 2 detectors but I can t figure out how to change to the second detector A If you can t change the detectors this means that you don t have the DET function in the Function Menu You will need to add it by changing one of the selections in location 18 through 26 in the Custom Settings Menu These locations correspond to the left center and right buttons of the first second and third Function Menus To see what the current choices are look them up in the
76. ry to represent that high voltage Select which detector you want to change using the det softbutton The choices are detector 1 2 or 3 Use the J or T softbuttons to change the value of the factor which in turn raises and lowers the actual high voltage Save the data by pushing the sav softbutton after which the menu will change back to the or Setup Menu To change another detector just push the ok softbutton 11 Maintenance 11 This menu will allow adjustment of several parameters without changing their permanent values The adjustments include high voltage lld uld saturation gain light beeper divisor and battery In addition it will allow the use of a monitor program See the section on Maintenance for more information 12 Factory Setting 12 This setting is used atthe factory to preset the instrument The settings are the same as the Standard Instrument Preset combined with the Pancake GM detector In addition it sets up and programs all the other parameters such as MODEL 5000 CYPHER Health Physics Instruments 18 XIII Calibration Menu and Detector Setup Menu The Calibration Menu and the Detector Menu allow interactive changes to be made to the instrument This permits changing many settings or variables while looking at an operating instrument The Calibration Menu is used in changing the calibration of the instrument during routine calibrations The Detector Setup Menu is used for changing the settings variables and par
77. s J L6 i 195 X Timebase Base Timebase o 1x2 19 DisoTwe DisplavTvpe Where D pointis 69 1233 197 Bara 70 1234 198 C Ranaelolimit Limitforranaina down 2 1235 19 X RanaeeHiLimit Limitforranaingun 72 136 200 RanaeUpTime Time to ranae un 73 i 5 13 ou RanseDnTime Timetoranaedown 74 138 jJ X TimeConstnt TimeConstant 7 139 203 DisolavConfa ConfiouretheDisplv L7 o25 Caltow Part of Calibrate Number Diait __ 78 2 06 j Exonent Exnonent _ 1 33 20 Prefix Base 80 14 o8 nits Base Units 81 15 o9 J Base Timebase 82 16 210 DisoTwe B DisplavTvoe Where D pointis 93 uy o Bara 84 a o2 RanoeLolimit Limitforranainadown 85 o3 jJ RanoeHilimit Limitforranaingun 96 10 RanaeUpTime Timetoranaeun 8 O CC Cia 2 Dn Limit Timetoranaedown 88 h 1522 jJ TimeConstnt TimeConstant 89 1253 217 DisolavConfa ConfiauretheDisplav 90 1324 J os8 IiNTGRT CalHiah Part of Calibrate NumberDiait
78. s Mode to turn on this mode Then program it in the Setting Up a New Detector section for the units prefix etc just the same as the rate range The CPM S range can also be changed into any units It does not have to be used for CPM S Internal Time Base The internal timebase of the Cypher can be in Counts per Minute or in Counts per Second In general CPM is used with conventional units and CPS is used with SI units See the section on Programming Internal Timebase for more information Detector There are a maximum of 3 detectors that can be used with the Cypher if each needs its own set of settings Of course any number can be used with the same settings For example many GM detectors use the same high voltage and all should be used on the CPM S range However all would not read correctly with the Rate Range To add detectors you will need to either make a DET Function Menu or Soft Button In addition you will need to setthe Detector Max See section above on Buttons Printed Bargraph scale The printed bargraph scale is between the window and the display It contains the numbers for the scale for the bargraph The Appendix contains a copy of many different bargraph scales for various bargraphs To install a scale 1 Remove the bottom case from the instrument 2 Remove the two screws that hold the front of the circuit board to the spacers These are reached through the slot in the battery mounting plate The circuit board wi
79. s per unit This is an approximate setting Check the actual setting for each detector in the Calibration or Setup Menu HIGH VOLTAGE SETTINGS 9 8 Volts unit of setting This table has some common settings for high voltage 25 Power Off See Check 23 High Voltage Cal 26 Power Time This is a factor that calibrates the high voltage displays in the Cypher It does not change the value of the actual high voltage This is best set in the High voltage Calibrate Setup Menu Its nominal value is 90 See the Maintenance section for details on setting this variable This is the timer for the automatic turn off It sets in increments of 25 5 seconds and can be set from 0 to 255 It is preset to 255 which is 108 minutes This means thatthe instrument will automatically turn off in 108 minutes after the last button has been pushed 24 Mode Lockout 27 This determines which modes can be displayed Set itto off if itis a mode you do not want Setitto on if itis a mode you want to be able to choose with the MOD Softbutton The common setting is 27 which turns on all the Modes except the User Mode The Current Mode should be setto one of the modes that is on MODE LOCKOUT AND DT ON OFF TABLE 28 Prefix CPM S RATE USER INTEGRATE SCALER The prefix is the starting point for all the modes except the Scaler MODEL 5000 CYPHER Health Physics Instruments 28 Power User 1 Thru 3 This allows any 3 characters to be displayed on the right hand si
80. s the various menus Using Menus Pushing the MODE button will change the display to the first Function Menu Pushing it again will take you to the second Function Menu and pushing it again will take you back to normal operation This is all the menus there are for normal operation The NXT softbutton means next Each Function Menu has its own display The buttons below the menu selections are changed to represent the Menu choices above them These are called Softbuttons The word on the bottom line of the display is the new function of the button The word on the top line of the display is the current setting of that function Pushing the button will change the setting and thus the top word Repeatedly pushing the button will scroll though all the possibilities of that button Below is a list of the various menus Each item is described in the appropriate section 0 CPM 1000 POCHE HER MODE OFF MED NXT TC MOD MODE SET OFF OFF LCD NXT LTE BUZ MODE T p Push MODE to display the 2 Function Menus and also to return to the normal display This is all the menus for normal operation MODEL 5000 CYPHER Health Physics Instruments MENU NAME CHOICES MENU DESCRIPTION Range Hold No Range Hold Range Holi on Range Hold Setto Slow M Setto Medium ST Setto Fast Counts Per Minute Mode Scaler Mode The Function Menus on the top half ofthe table are delivered with the Cypher The remaining in the shaded area ma
81. sh the MOD softbutton until RTE is displayed above MOD Then push the NXT softbutton twice The Rate Units should now be in the display 3 Expose the detector to a radiation field that is at the lower end of the sensitivity of the detector Change the Calibration Factor and Exponent until the reading is correct 4 the detector to a field that is at the upper end of the sensitivity of the detector Adjust the Deadtime until the reading is correct 5 Repeat steps 4 until both settings are correct Health Physics Instruments 6 Expose each range decade at 20 and 80 of full scale Note the readings on the calibration report 7 Turn the instrument off by pushing the POWER button when finished Integrate Mode Calibration 1 Enter into the Calibrate mode as discussed above in Changing The Display To Calibrate Mode 2 Change to the Integrate Mode If the integrate Mode is not displayed then push MODE Repeatedly push the MOD softbutton until INT is displayed above MOD Then push the NXT softbutton twice The Integrate range should now be in the display Read section G below to determine if you want to use the Rate Range Calibration Factor to set the Integrate range Calibration Factor 3 Expose the detector to a known dose in a radiation field that is at the lower end of the sensitivity of the detector 4 Change the Calibration Factor and Exponent Repeat step 3 until the reading is correct 5 Expose t
82. sing a Preset Detector setting will reprogram the variables listed below If the detector has already been calibrated then the settings will be changed If you wantto save the existing settings we recommend writing them down from the Detector Setup Menu To program the Cypher using the Preset Detector settings do the following 1 Disconnect the current detector 2 Enter into the Setup Menu by turning on the instrument with the MODE button pushed down If this does not resultin the words Calibration 1 in the display then the Front Panel Calibration Adjust has been disabled and it is necessary to use the internal one open the case and push down on the CAL push button top right hand side ofthe circuit board under the display while turning the instrument on The words Calibration 1 should be on the display MODEL 5000 CYPHER Health Physics Instruments Using the J or T softbuttons repeatedly push them until Preset Detector 4 is visible Push the ok softbutton Using the T softbutton repeatedly push it until the desired instrument setup name is displayed Push the 1det softbutton to select which detector you want these settings to program Then push the sav softbutton It will show that itis programming and then go back to the Main Setup Menu Push the softbutton to go back to the Setup Menu Pushing MODE will now go back to normal operation Reconnect the new detector 22 This table contains the defaults that are programmed into
83. st The D other options are listed underthe or A Buttons in Custom Settings There are 2 Function Menus with the factory settings All of the functions may not be necessary If you do not need all of the functions you could change to 1 Function Menu This may be simpler for some people to understand because it only involves one screen change Alternatively you could change to 3 Function E Menus if you need more capability The location of the functions within the Function Menu can also be changed Each of the three locations above the three right hand buttons is available for any of the functions If you are left handed and use the MODE button frequently consider moving it to the left hand side of the instrument Changing location 18 from 5 to 10 and location 20 from 10 to 5 in the Custom Menu will swap the MOD and RH We usually put the most used functions on the first menu Display F The display is the other part of the instrumentthat can be customized to fit your needs Particularly important is the full scale range of the bargraph We have it set at 10 for the factory settings however many survey meters have 50 500 and 5000 CPM full scale primarily to put background counts from pancake GM detectors farther up the scale If you wanted to emulate one of these meters change the Bargraph Type to 2 in Custom Setup There also is a 2 5 25 250 and 2500 full scale available If you are using the instrument in areas where the barg
84. th batteries should fold away from the front panel 3 Remove the old scale 4 Cutoutthe new scale using scissors Add a small piece of double stick tape to the back and stick itto the LCD using the old scale as an example 5 Replace the scale in the instrument Replace the screws and bottom case 3l MODEL 5000 CYPHER XVIII Maintenance This section covers the adjustments ofthe instrument to maintain it in working order For additional information on repairing the Cypher please consult the Repair and Operation manual It includes a complete circuit description parts list exploded views and schematic High Voltage Calibration The high voltage displays on the Cypher are actually measured rather than just calculated This measurement system may need calibration The calibration is simple and straightforward 1 Connecta high voltage high impedance meter with gt 10 000 megohm input resistance to the external connector on the handle The meter should be capable of measuring 2000 Volts DC 2 Turn the instrument on in the Setup Menu and change it to the HV Calibrate 9 Menu Press ok to change into the HV calibrate display 3 Measure the high voltage with the external voltmeter 4 Using the T and J softbuttons change the Cal number until the HV is as close as possible to the measured high voltage 5 Push the ok softbutton to save the value Push the POWER button if you do not want to change the calibration Mai
85. the Cypher with the Preset Detector Menu The Presets change the following variables Please note that they may reprogram some items such as time constant that may need adjusting Internal Thin Thin 1 1 alpha Neutron Time wall end Nal Scin Pro base GM GM Scin tillator portinal setting tillator UG i a a PES P Ht Cal amp Exponent Pref Unis Tbase DisplayBarType CPM 41 41 4i 4i 41 Lo Hi Range Lim Up Down Time Time Constant INTEGRATE 00 foo foo foo joo EE Cal amp Exponent IEEE CPS 4 EIOS Prefix Units 60 Lo Hi RangeLim RATE EE Cal amp Exponent CPS PrefixUnits Tbase 4 4 4 4 4 1 4 5 5 5 4 5 4 4 Display BarType 4 4 4 4 1 4 4 U 4 4 4 4 m m x m 0 0 0 0 0 5 4s T 4s fas NEN 1 3 4 8 41 far far fari Lo Hi Range Lim Up Downtime oo oo oo Joo oo Time Constant INTEGRATE parem eee ee pem epe resa n Cal amp Exponent Prefix Units 4 4 4 4 8 A max ut 00 53 153 53 48 48 148 48 EE 1 aa Lo Hi Range Lim ALL MODES zm High Voltage na Gain Discriminator na na wa wa n a n a n a Window n a n a n a n a 1 pau 3 48 EEES 900 1900 ao d 2 1 1 4 8 T a feo 44 4 8 1 s0 80 80 HV Saturation o jo Deadimeusec na 10 1 2 BeeperDivde
86. the scaler It is set by the time in the scaler Time Scl1 is the MSB of a 3 byte HEX number Each portion of the number is presented in decimal The 3 byte number is the number of seconds that are in the display It is presetto 60 which makes the display turn on with 60 seconds or 1 minute There would normally be no reason to change this setting 36 Timebase This has 4 possible settings and sets the characters in the display Changing this does not change the calibration TIMEBASE TABLE 29 38 User 1 Thru 5 This allows any characters to be used for the units and timebase If user is chosen under Units then these 5 characters will occupy the space for units and timebase They are normal ASCII characters Each one needs to be programmed with its own character User 1 is the left hand character ASCII CHARACTER TABLE 32 48 0 je js MODEL 5000 CYPHER Health Physics Instruments o R H L 1Setting 2 Character There are settings from 0 to 255 however they are not normal ASCII characters If you need a strange character please contact the factory 39 Window This sets the size of the window It may be set from 0 to 255 If the Window is turned on pulses that are larger than the discriminator but smaller than the Window plus Discriminator will be counted For example if the discriminator is setto 30 and the Window to 60 then pulses in the range of 30 to 90 will be counted
87. tion Factor on all modes except the scaler Itis set for each detector and each mode It is best set in the Calibrate or Detector Setup Menu Itis in reality a two byte HEX number The High byte and low byte make up the complete calibrate number It is set from 100 to 999 This is 100 times greater than the value in the display in the Calibrate Mode because the program takes care of the difference To setit to 1 00 in the Calibrate Display set Cal High to 0 and Cal Low to 100 To set it to 5 00 in the Calibrate Display set Cal High to land Cal Low to 2440 7 Check This location contains the settings for several variables ADJUST on and off for scaler and for other ranges No tums the adjust off and Yes turns it on This can also be set by the menu Front Panel 7 of the Setup Menu POWER OFF Tums the power off automatically after the time specified in Power Off Time Set to no to turn off the automatic power off If you want it to turn off automatically setit to yes This can also be set by the menu Front Panel 7 of the Setup Menus FRONT PANEL CALIBRATE Turns on and off the Front Panel Calibrate Set to No if you want to have to open the instrument to change the calibration Set it to yes if you want access to the calibration adjustments through the front panel This can also be set by the menu Front Panel 7 of the Setup Menus CHECK TABLE Setting Adjust Adjust All Scaler modes MODEL 5000 CYPHER Health Physics Instruments
88. tton until the required detector number is 5 displayed If there is no DET function in either the function menus or the Quick keys then there is only 1 detector to calibrate To add more detectors see the section on Custom Settings Menu CPM amp Scaler Mode Check 1 Tum on the instrument by pushing the POWER button If the units of CPM are not displayed in the display then push MODE Repeatedly push the MOD softbutton until CPM is displayed above MOD Then push the NXT softbutton twice CPM should now be the units in the display 2 Connecta pulsarto the detector connector on the end ofthe handle Set the pulse height to the nominal value for the detector in use or increase the level until a steady reading is obtained The Cypher should be very accurate because it is crystal controlled 3 Check the values at 20 and 80 of full scale for all ranges 4 Ifthe reading is higher that the pulsar at high rates then the deadtime correction is turned on If itis lower not all the counts may be counted Try turning up the level on the pulsar G 5 Change the mode to Scaler and accumulate a 1 minute count at known low and high rates This will check both the scaler and the timer 6 Note the values on the calibration report Rate Mode Calibration 1 Enter into the Calibrate mode as discussed above in Changing The Display To Calibrate Mode 2 Change to the Rate Mode If the Rate Mode is not displayed then push MODE Repeatedly pu
89. ture dependence HV 2 Rate 1 over temp range Humidity range 0 to 9596 non condensing Instrument may be in taken through the condensing phase with the addition of a desiccant pack ll Introduction The model 5000 Cypher is a highly functional instrument It can be user adapted to many uses It may of course be used in general surveying but it will also find use in counting labs medical applications and non technical radiation monitoring The Cypher handles all of these tasks simply and with minimum operator training because the instrument can be tailored to the specific application from a sophisticated full featured professional tool to a simple one button meter The standard instrument with factory settings has simple menu s and 2 front panel Quick keys For more demanding applications the menu s can be increased to 3 menus or reduced to none for simple applications Some ofthe features are e Deadtime correction Automatic Power Off e Linear or Log Bargraph e Autorange with minimum and maximum scales e Saturation Detector e Ratemeter Integrator and Scaler e Easy active calibration and setup e Averaged reading with dynamically set time constant Sealed metal case with out of the way cable connector NOTE The Abbreviation CPM S is used in this manual when referring to CPM or to CPS When reference is to CPM it also includes CPS if the instrument is set to the CPS intemal timebase MODEL 5000 CYPHER H
90. ult in the words Calibration 1 in the display then the Front Panel Calibration Adjust has been disabled and itis necessary to use the internal one open the case and push down on the CAL push button top right hand side of the circuit board under the display while turning the instrument on The words Calibration 1 should be on the display 2 Ifyou want the Calibration Mode Push the OK softbutton If you want the Detector Setup Mode then push the T softbutton until DET SETUP 2 is in the display then push the OK softbutton The Cypher will resume normal operation with the count rate value on the top line and the calibration factor on the bottom line 3 The softbuttons change the numeric value in the bottom line of the display The lt Softbutton will move the cursor over 1 place and the T softbutton will increase the value of the number positioned over the cursor Using the two buttons you can change the value of the displayed item in the bottom line The value in the top line will change along with the new value in the bottom line 4 In the Rate and CPM modes the item on the bottom line can be changed by pushing MODE then the 1 or T softbuttons until the item description is what you want to change or do Then push MODE button to return to the calibration If you do not push the 1 or T softbuttons the normal function menus will be displayed when you push the MODE button MODEL 5000 CYPHER Health Physics Instruments In the Inte
91. uttons repeatedly push them until Preset Instrument 3is visible Push the ok softbutton Using the T softbutton repeatedly push it until the desired instrument setup name is displayed Then push the sav softbutton It will show that itis programming and then go back to the Main Setup Menu Pushing MODE will now go back to normal operation Push the softbutton to go backto the Setup Menu MODEL 5000 CYPHER Health Physics Instruments 21 XV Preset Detector Menu The Preset Detector is used to setup the detector notthe instrument for a specific class or type of detector It is provided as a quick method to come close to the optimum settings for a specific detector especially if you are adding or changing detectors Settings 1 Pancake GM This is for 2 diameter Pancake GM detectors that operate at 900 volts 2 Thinwall GM This is for GM detectors that have a thin wall These often have a sliding shield for Gamma measurements 3 Thin End GM This is for GM detectors that have a thin end window They are usually about 1 Diameter and are used for Gamma and Alpha Beta contamination 4 1x1Nal This is for Nal scintillators coupled to a photomultiplier This is a good starting point for any 900 volt scintillator 5 Alpha Scint This is for alpha scintillators 6 Neutron Prop This is for proportional detectors The most common use is with moderated BF3 detectors Programming Programming the Cypher u
92. wo lower ranges at 80 of full scale Note the readings on the calibration report The deadtime correction is already set in the Rate Mode 6 the instrument off by pushing the POWER button when finished Cal factor for Integrate Range and Rate Range The rate range calibration factor can be used to set the integrate range If you are satisfied with the rate range calibration you may be able to use the rate range calibration factor as the basis for calculating the integrate range calibration factor You may also choose to calibrate them independently If the integrate range is in the same prefix units as the rate range then the rate range Calibration Factor can be used in calculating the integrate range Calibration Factor If the rate range is in mR h and the integrate range in mR then they are considered to have the same units Divide the rate range Calibration Factor with Exponent by 60 if the internal timebase is in CPM and by 3600 if the internal timebase is in CPS Use this new calibration Factor and Exponent for the integrate range If you use this Calibration Factor then the rate range and integrate range will have the same calibration 11 X Setting Up a New Detector When the detector is changed another detector added or the instrument was ordered without a detector it is necessary to configure the instrument to operate properly with the detector This section discusses the procedures to change the current settings for
93. would still have to change the calibration adjustment with a screwdriver to obtain a correct reading The Cypher is very similar The Units Prefix and Timebase are just like the printed scale Changing them will not change the reading It still will have to be adjusted with the Calibration Factor and Exponent which can be thought of as the screwdriver adjust The big difference between the Cypher and a traditional instrument is that the Cypher will automatically select the next higher or lower prefix when it needs to change ranges rather than relying on the range switch There are 2 ways to setup the detector If itis listed underthe Preset Detector Menu then you could choose one of those for setup If itis not listed you will need MODEL 5000 CYPHER Health Physics Instruments to go through all the following steps Alternatively you could use one of the presets and then modify it User Mode The User Mode is programmed just like the Rate Mode except itis called USR in the MOD function menu To turn it on use the Mode Lockout in the Custom Settings Menu Determining The Different Settings The Calibration Factor Exponent Prefix Units Timebase and Range limits all need to be calculated for each detector The high voltage discriminator gain and saturation also need to determined Use the Detector Worksheet in the Appendix as a guide to this operation It is a good idea to determine the settings that you wantto use for the detector
94. y be programmed by using the Custom Settings Mode Time Constant uv vo Jlo wl gt o o 3 4 m m Display Contrast Light Beeper Window o fe em Deadtime Detector Hold Beep Divider RangeHold See ree Time Constant TC pz o _ Mode MOD E p as a Ir _Display Contrast LCD tight LTE re c Beeper BUZ s Window WN aaa DENS Deadime DIM Detector pror reme le Hold Beep Divider need aes N FIO wj n m m V Operation The following is a description of the instrument When itis new from the factory it has the factory presets installed Not all of the functions are available in these presets Individual programming may change some or all of these functions Turn On And Off The Cypher is easy to turn on just push the POWER button Pushing it once will turn the instrument on and pushing it again will tum the instrument off There are two turn on displays the first will show the version number of the software 4 places of user text and the hours remaining on the battery The second will show the function ofthe two Quick keys If the batteries are too weak it will not turn on If it tries to tum on and immediately turns off it

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