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9230 Users Guide 811002.vp

1. 7 SET DOWN Displa Display UAI Auto SET Tg 25 C Auto Mode S SET DOWN Display PREP Select nnAn r Toggles C F Manual Mode rz P Display SET SUF Display nnaint Temperature R CSETEXIT SiL A EXIT Select Set Point 6 Display Power UPIDN 7 Program Advance SET Y Adjust SetPoint Display Set Point SET DI UP DN Resistance Adjust Units C F SET UPIDN Optional Adjust Proportional Adjust Scan ON OFF Band UP DN SET Display FrEE2H Adjust Scan Rate Y Uy i Configuration Display trEE2C Menu EXIT EXIT EXIT EXIT Program 1 UP Program UP Program 3 UP Serial Parameters Parameters Parameters Interface Menu J4 ON Menu j E LDN Menu DN Menu ad SET Pd SET SET Y Y Y Adjust Adjust Maintain Adjust Freeze Adjus Ready Temperature Temperature Melt State Baud Rate Y Y Y Adjust Prep Melt Adjust Maintain Adjus Temperature Time Out Sample Period Y pN Adjust Prep Adjust Maintain Adjus Scan Rate Time Out Time Duplex Mode Y Y Y Adjus Adjust Freeze Adjus Beeper Hot Temperature Linefeed Y Y Menu Legend Adjust Adjust Freeze While in MANUAL Mode Prep 1Time Hot Time e Press the SET button to step through the menu and to access the parameter Use the UP and Y Y DOWN buttons to adjust t
2. 60 8 7 5 Return to Standby aia wy ake BR uh Va NI e Rte 60 9 Calibration Procedure 61 9 1 Calibration Equipment llle 61 9 2 Calibration Procedure 02 00 eee eee 61 10 Maintenance 65 11 Troubleshooting lt ea Sew vee 07 11 1 Troubleshooting Problems Possible Causes and Solutions 67 I2 COMMENtS s i ob ar a od a e 68 11 2 1 EMG Directive o mate es ecb ey ee cae Ges ee sese ees Y qa es 68 11 2 2 Low Voltage Directive Safety s sce s mon llle 68 iii Figures and Tables Tablel Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Table 2 Table 3 Figure 7 Table 4 International Electrical Symbols ls 1 Auto Program Diagram 13 Bottom Panel ss 25s eee eA ee ees 15 Pront Panel 5 22 x eo xm a BOS ea a e GRO 16 Top Panels uio AR eR Ro XR Y DRE E Eos 17 Rear Panel o sac o kon a bub bee RR GS m a RA 19 Controller Flowchart 2e o yo ORE aw a oS 22 Default Programmable Set points Factory Set 28 Auto Program Parameters Prog 1 Prog 2 Prog3 34 Serial Cable Wiring oos ee scra seo ze s 49 Serial Interface Commands llle 22 1 Before You Start Symbols Used 1 1 Before You Start Symbols Used Table 1 lists the International Electrical Symbols Some or all of these symbols may be used on the instrument or in this manua
3. Interface Commands The various commands for accessing the instrument functions via the digital in terface are listed in this section These commands are used with the RS 232 se rial interface The commands are terminated with a carriage return character The interface makes no distinction between upper and lower case letters hence 51 9230 Maintenance System User s Guide either may be used Commands may be abbreviated to the minimum number of letters which determines a unique command A command may be used to ei ther set a parameter or display a parameter depending on whether or not a value is sent with the command following an character For example an s lt cr gt returns the current set point and an s 28 00 lt cr gt sets the set point to 28 00 degrees ec In the following list of commands characters or data within brackets and are optional A slash denotes alternate characters or data Numeric data denoted by n may be entered in decimal or exponential notation Char acters are shown in lower case although upper case may be used Spaces may be added within command strings and are simply ignored Backspace BS ASCII 8 may be used to erase the previous character A terminating CR is im plied with all commands Table 4 Serial Interface Commands Command Returned Acceptable Command Description Command Format Example
4. ON to operate the instrument and OFF to discon nect the power 3 The melt heater plugs into the rear of the instrument into the inner melt heater connector provided Be sure it is plugged in during operation 4 The melt heater switch can be set to MANUAL ON position or AUTO posi tion The instrument s microprocessor has control when the switch is in the AUTO position Warning When the melt heater switch is in the MANUAL ON position the melt heater is continuously energized and can get hot 5 The serial port is a DB 9 male connector for interfacing the instrument to a computer or terminal RS 232 communications Thermal Block Assembly The thermal block assembly holds the gallium cell and heats or cools to main tain the proper temperature The thermal block assembly consists of the thermal block thermoelectric Peltier devices the gallium cell and the top insulation plugs 1 The thermal block is specifically designed to contain the gallium cell The thermal block also has 2 preheat wells for the test thermometers 5 Parts and Controls Thermal Block Assembly a lt lt INNER MELT HEATER E Inner Melt MANUAL ON Heater Connector Melt Heater Switch Power Switch Power Connection RS 232 Interface Figure 5 Rear Panel 19 9230 Maintenance System User s Guide 20 2 The block assembly is heated or cooled as necessary to maintain t
5. Hart Scientific 9 9230 Gallium Cell Maintenance System User s Guide Rev 811002 Fluke Corporation Hart Scientific Division 799 E Utah Valley Drive e American Fork UT 84003 9775 USA Phone 1 801 763 1600 Telefax 1 801 763 1010 E mail support hartscientific com www hartscientific com Subject to change without notice e Copyright O 2005 Printed in USA Rev 811002 Table of Contents 1 Before You Start l 1 1 Symbols Used o cu eee cosmos sm ee ui 1 1 2 Safety Information 2 000 2 1 2 1 WARNINGS et o3 iaci Bae AE ees ee Sik e we We EUR 2 1 2 2 CAUTIONS 4X ua i a cel a Regen se ep een oh a 3 1 3 Authorized Service Centers lll 4 2 Introduction 7 3 Specifications and Environmental Conditions 9 3 1 SpecIfICatlOniS oco gom eR eA Re Eee X ROBO 9 32 Environmental Conditions len 9 3 3 Warranty ea 2 Oa Soh ww SU Ex X Ue S4 ro 10 4 Quick Start in Auto Program Mode 11 4 1 Unpacking oa ss Se A pb NER UR NS ELS 11 iL Sei eS 44 4 Soaks deh to WEsdS 44deeS Sah os 11 4 3 lo jl T ab ee dared eee Saw ene A ket bas 11 44 Auto Program i a aaa p a eea a e aD i 12 4 4 1 Starting the Auto Program cs 22e 12 4 4 2 Generating the Melt Plateau o o o o o 12 4 4 3 Refreezing the Gallium Cell oo E 14 4 4 4 Return to Standby 4s eei a a m eas UR
6. cations For calibration purposes the temperature is measured at 29 27 C and RO is adjusted as applicable The following steps may be followed to calibrate the Model 9230 1 Enter the Manual mode of operation and set the temperature of the Model 9230 to 29 270 C with a frozen gallium cell installed Use a small amount of silicone oil 200 05 or equivalent in the entrant well for good thermal transfer from the cell to the thermometer Be sure to install the 3 top insulation plugs on top of the cell Insert the reference thermometer and monitor the tempera ture of the cell with an appropriate readout 2 Allow the system to stabilize at 29 270 C for approximately 1 to 2 hours When the stability of the reading is less than 0 02 over a 20 to 30 minute pe riod record the average reading of the reference thermometer This reading gives the error of the Model 9230 and may be used for as found data if re 61 9230 Maintenance System User s Guide 62 quired No further action is required if the unit is found to be within acceptable limits 3 If step 2 above shows that the Model 9230 is out of specification or accept able limits use the following equation to calculate a new RO value R R T T 0 3850 Where R the new calculated value for RO R the old value for RO currently programmed in the Model 9230 mem ory T the temperature measured in step 2 above T the set temperature of the 9230 from
7. 30 77 C for a few more minutes to complete the outer melt of the gallium cell The unit then sounds an audible beep 16 times the display changes from Pr EP to nnfiint and the block temperature is reset to 29 86 C to maintain the melt ing gallium cell nnfiint E Maintain instrument maintaining melt plateau The user may then insert a preheated monitor thermometer to monitor the tem perature of the gallium cell Due to the heat applied to the cell by the inner melt heater the temperature of the cell s entrant well is higher than the gallium melt ing point 29 7646 C for a short period of time Generally after 30 to 60 min utes the temperature of the cell s entrant well is sufficiently stable to begin calibrations of thermometer sensors The duration of the melt plateau varies de pending on usage but lengths of 5 days or longer are achievable Auto Program Ending the Gallium Melt Plateau and Refreezing the Cell At the end of the melt plateau or when the user wishes to end the plateau the Auto Program is advanced by pressing the program advance button sequence SET om Access program advance Display will flash advance for 1 second then show the current program state AdU Program advance O TO O FrEEgt j Start freezing the gallium cell Gallium like water expands in volume when freezing Therefore the cell must be frozen from the bottom up or there is a potential for damage to the cell The Peltier devic
8. C 2 XX XXX Freeze Cold Scan Rate FREEZC FrECSr 0 4 0 5 0 6 C min 2 X X Freeze Cold Time FREEZC dur 6 120 150 180 min 2 XXX Freeze Melt State Manual Mode Only Fr nELt MELT 3 MELT FREEZE Factory Set 6 20 34 Prog 1 The parameters within the Prog 1 submenu are accessed from the secondary menu after the proportional band function by pressing the SET button Co nF 6 flashes and then the name of the first Auto Program parameter menu Prob is displayed 8 0 Proportional band setting SET Select the configuration menus t LConFiG Flashes before entering configuration menus 6 Controller Operation Prog 1 6 20 1 6 20 2 Prob Prog 1 submenu Pressing the SET button accesses the parameters within the Prog 1 submenu Pressing the UP button accesses Prog 2 The well temperature is displayed by pressing the EXIT button Ready Temperature The Ready Temperature parameter is the temperature at which the instrument stabilizes before initiating a melt in the gallium cell The default value is 29 27 C and can be seen on Figure as the temperature that the well goes to when the display shows vu o Rit The instrument holds the well at this tempera ture for 30 minutes minimum to assure that the gallium cell has stabilized be fore allowing the melt to proceed When Prog 1 is displayed press the SET button to access the Ready Tempera ture parameter The display flashes r du t and then displays the current Ready Temper
9. Command Description Command Format Example Returned Example Values Set freeze cold temperature fr ec n fr 0 01 0 01 to 10 00 C Read freeze cold scan rate fc sr fc freezCsrate 0 2 C or freezCsrate F min 0 2 C or F min Set freeze cold scan rate fc sr n fc 0 6 0 4 to 0 6 C min Read freeze cold duration d frc dfrc freezCdur 140 min freezCdur 140 Set freeze cold duration d frc n df 170 120 to 180 min Program 3 Read freeze melt state frm t frm FreezeMelt MELT Mode FreezeMelt MELT Mode Set freeze melt state frm t n frm melt MELT or FREEZE Serial Interface Menu Read serial sample setting sa mple sa sa 9 sa 1 Set serial sampling setting ton sa mple n sa 0 0 to 10 000 seconds Set serial duplex mode du plex f ull h alf FULL or HALF Set serial duplex mode to full du plex f ull du f Set serial duplex mode to half du plex h alf du h Set serial linefeed mode Iffeed on of f ON or OFF Set serial linefeed mode to on If eed on If on Set serial linefeed mode to off If eed of f Ifzof Calibration Menu Read RO calibration parameter r 0 r r0 999 999 Set RO calibration parameter r O n r 100 713 98 0 to 102 0 ohms These commands are only used for factory testing Miscellaneous not on menus Read firmware version number ver sion ver ver 999 9 99 ver 9230 v1 00 Read structure of all commands h elp h list of commands Legend Optional Command data Returns either information n Numeric data supplied
10. Incorrect RO parameter Find the value for RO on the Report of Calibration reading that was shipped with the instrument or from subsequent calibrations of the in strument Reprogram the parameter into the Model 9230 memory see Section 6 24 1 RO Allow the instrument to stabilize and verify the accuracy of the temperature reading Controller locked up The controller may have locked up due to a power surge or other aberration Initialize the system by performing the Factory Reset Sequence Factory Reset Sequence Hold the SET and EXIT buttons down at the same time while powering on the instrument After the instrument displays 1 nit release the buttons The display shows 1n t then displays 92 38 then dis plays the firmware version and then displays Aut o After performing the master reset sequence all of the configuration parameters are reset to their default values Reprogram the RO parameter into the Model 9230 memory see Section 6 24 1 RO and any other applicable configuration parameters Allow the instrument to stabilize and verify the accuracy of the temperature reading Blank display after mains Blown fuse A fuse may have blown due to a power surge or failure of a com power applied ponent Replace the fuse once If the fuse blows a second time it is likely caused by the failure of a component Always replace the fuse with one of the same rating voltage and type Never replace the fuse with one of a higher cur rent
11. RR e 14 5 Parts and Controls 15 5 1 Bottom Panel xa we Sw a we toe ee Ee 15 5 2 Front Panel ex ES E R ees 16 53 Top Panel lt 24 6 besos be See eee ke eed s eee 17 5 4 Rear Panel eede 4404546464414 8484464648 448 18 3 9 Thermal Block Assembly 0008 18 6 Controller Operation 21 6 1 Standby A ed dra quee e AN 21 6 2 Starting the Auto Program o 21 6 3 Auto Program Initiating and Maintaining the Gallium Melt Plateau 23 6 4 Auto Program Ending the Gallium Melt Plateau and Refreezing the Cell 24 6 5 Return to Standby 2 2 o e 25 6 6 Program Advance en 25 6 7 Manual Mode 0 000 les 26 6 8 Starting the Manual Mode 00 26 6 9 Temperature Set pOMt o o e o 27 6 9 1 Programmable Set points 2 o o 27 6 9 2 S tspoint Val amp sa a ide aa ar ew aa 27 6 10 Temperature Scale Units o u Doski 28 6 1 Scam toc iue redeo he a A a UE des 29 6 11 1 Scan Control dermis OE DES ORR RED EA OLED ee 29 0 12 Scan Rates iau soe des D Soie ect es Dic ae 29 6 13 Temperature Scale Units llle 30 6 514 Secondary Mem e 30 6 15 Peltier Device POWer llle 30 6 16 Set point Resistance ce sias ste eeu ok eae 30 6 7 Proportional Band e e a 31 6 18 Controller Configuration Operating and Calibration Para
12. Returned Example Values Display Temperature Read current set point s etpoint S set 9999 99 C or F set 25 00 C Set current set point to n s etpoint n s 28 5 00C to 40 00 Read units u u u C or F u C Read temperature t t t 9999 99 C or F t 29 86 C Set temperature units u nits c f CorF Set temperature units to Celsius u nits c u C Set temperature units to u nits f u f Fahrenheit Read scan function sc an SC scan ON or OFF scan ON Set scan function sc an on of f ON or OFF Turn scan function on sc an on sc on Turn scan function off sc an of f sc of Read scan rate sr ate sr srat 999 99 C or F min srat 0 5C min 0 1C min to 5 0C min Set scan rate to n degrees per sr ate n sr 5 minute Read program state adv adv adv OFF WAIT PREP WAIT MAINTAIN FREEZHOT FREEZCOLD Advance program state adv adv auto adv adv ADV AUTO Secondary Menu Read heater power po wer po po 999 9 po 12 3 duty cycle 52 7 Digital Communication Interface Interface Commands Command Returned Acceptable Command Description Command Format Example Returned Example Values Read proportional band pr op band pr pb 999 9 pb 8 Set proportional band pr op band n pr 8 83 0 1C to 100C Read set point resistance sr sr 999 999 111 153 Configuration Menu Program 1 Read ready temp rd y rd readytemp 99 99 C or readytemp 29 2 F 7C Set re
13. by user 9 Numeric data returned to user x Character data returned to user NOTE When DUPLEX is set to FULL and a command is sent to READ the command is returned followed by a carriage return and linefeed Then the value is returned as indicated in the RETURNED column 54 8 Melting Point of Gallium Realization General 8 1 Melting Point of Gallium Realization This section explains the procedure for realizing the melting point of gallium using a Model 5943 Stainless Steel Gallium Cell and the Model 9230 Mainte nance System General The gallium melting point 29 7646 C is a critical temperature Thermometers used in life science environmental monitoring at room or body temperatures and many other applications depend on it for accurate calibrations Laboratory standards rely on it as an ITS 90 check standard and as a means of measuring drift between calibrations Use of the Model 5943 Stainless Steel Gallium Cell and the Model 9230 Maintenance System provides an easy way to generate and maintain the gallium melting point Plateaus lasting up to 5 days are typical The Model 5943 Stainless Steel Gallium Cell holds a gallium sample that is 99 99999 pure The gallium is sealed in a Teflon envelope in a high purity argon atmosphere which is then sealed inside a stainless steel housing This double sealing method reduces leaching of the gallium sample and ensures a life of ten years or longer for the cell Gallium expand
14. gallium cell prepared as described in Section 9 Melting Point of Gallium Realization into the well DO NOT drop it into the well The well must be clear of any foreign objects dirt and grit before the cell is inserted Firmly place the two top insulation plugs into the well such that they rest on top of the cell Make sure that the inner melt heater is connected to the inner melt heater connector on the back of the instrument and the melt heater switch is in the Auto position Carefully insert the melt heater through the hole in the top insulation plugs and into the entrant well of the frozen gallium cell Make sure the inner melt heater extends to the bottom of the gallium cell entrant well Power Plug the instrument power cord into a mains outlet of the proper voltage fre quency and current capability Refer to Section 3 1 Specifications for power 11 9230 Maintenance System User s Guide 4 4 4 4 1 4 4 2 details Turn the instrument ON using the power switch on the back of the unit The instrument turns on and begins to approach 25 C The front panel LED display shows Auto Auto Program The Model 9230 is designed to automate the gallium cell melt plateau This is accomplished through the use of the Auto Program a microprocessor con trolled program that determines set temperatures scan rates duration times Peltier module configurations and melt heater controls By controlling all of these parameters in the pr
15. insulation plugs into the well on top of the cell e Insert the inner melt heater into the entrant well of the gallium cell e Start the Auto Program e Generate the melt plateau and remove the inner melt heater when prompted by the Model 9230 beeper alarm e Calibrate thermometers during the gallium melt plateau e Advance the Auto Program to refreeze the cell The details of operating the Model 9230 to realize the melting point of gallium are explained for each step in the following sections Preparing the Model 9230 to Receive the Gallium Cell The Model 9230 is designed to be used in a controlled laboratory environment see Section 3 2 Environmental Conditions Control the ambient temperature to a fixed temperature within the specified operating range 18 C to 28 C Rapid changes in ambient temperature of more than 1 0 C reduces the stabil ity of the instrument Avoid drafty areas Place the Model 9230 on a flat surface with at least 6 inches of free space around and 18 inches above the instrument Make sure that the well of the instrument is clean and clear of any foreign ob jects debris dirt or grit Connect the inner melt heater to the back of the instrument making sure that it is securely connected Place the inner melt heater cartridge into the melt heater storage well at the top back of the instrument 8 Melting Point of Gallium Realization Preparing the Frozen Model 5943 Gallium Cell for Installation in the Mo
16. rating The Instrument heats or Incorrect scan and scan rate settings The scan and scan rate settings may cools too quickly or too be set to unwanted values Check the Scan and Scan Rate settings The scan slowly may be off if the unit seems to be responding too quickly The scan may be on with the Scan Rate set low if unit seems to be responding too slowly 67 9230 Maintenance System User s Guide 68 11 2 11 2 1 11 2 2 Problem Possible Causes and Solutions The display shows any of the following Er c Err e Err 3 Err d or Err 5 Controller problem The error messages signify the following problems with the controller Err 1 a RAM error Err 2 aNVRAM error Err 3 a Structure error Err 4 an ADC setup error Err 5 an ADC ready error Initialize the system by performing the Factory Reset Sequence describe above The display shows Err 5 Defective control sensor The control sensor may be shorted open or other wise damaged Disconnect the power cord from the instrument Looking at the front of the instrument display remove the front panel and right side panel Locate the analog control board on the block side of the electronics panel The Molex connector at the top of the board connects the control probe to the controller see wiring diagram connector J4 Remove the connector and mea sure the resistance of the control sensor It should be approximately 110 ohms at room temperatur
17. that the gallium melt has begun Changing the Beeper parameter to OFF disables the beeper during this phase of the Auto Program After accessing the Prep Scan Rate parameter the display flashes bEEPEr and displays the current value of the Beeper parameter bEEPEr Flashes before entering beeper parameter bsrapsussaddscacsssumerscasssaseues peel OFF New beeper setting pel If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new beeper setting and continue to the prep 1 time Prep 1 Time After beginning the gallium melt see Figure 1 the Auto Program waits a short time before energizing the inner melt heater The Prep 1 Time parameter speci fies this time in seconds The default value is 480 seconds 8 minutes At the end of this time the Auto Program energizes the inner melt heater and sounds 4 audible beeps After accessing the Beeper parameter the display flashes dur and displays the current value of the Prep 1 Time parameter Flashes before entering the prep 1 time parameter SEC4S8O j Current prep 1 time value 8 minutes Wa seepauseaaeaseduaunsrenatereseues 37 9230 Maintenance System User s Guide 38 6 20 6 6 20 7 If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue
18. the well should be approximately the same level 52 mm below the top of the cell as that of the gallium in the cell when the thermometer is in place in the well Installing the Frozen Model 5943 Gallium Cell into the Model 9230 The instrument comes with a cell removal tool to aid in installing and removing the gallium cell from the Model 9230 well The tool has a spring loaded handle with a compressible rubber tip When the handle is squeezed thereby com pressing the spring the rubber tip is extended and the tip may be inserted into the entrant well of the cell Releasing the handle causes the rubber tip to com press and become firmly positioned in the entrant well Once lodged in the en trant well the cell can be gently lowered into the Model 9230 well Wet the rubber tip of the tool with transfer fluid e g silicone oil 200 05 for ease in in serting into the cell s entrant well CAUTION Do not use the cell removal tool to carry the cell The tool is to be used only to aid in installing and removing the cell from the Model 9230 well Do not drop the cell into the well Damage to the cell and Model 9230 may occur if the cell is dropped 57 9230 Maintenance System User s Guide 58 8 5 8 6 8 7 With one hand holding the outside of the cell insert the cell removal tool tip into the cell s entrant well as described above and verify that the rubber tip is firmly lodged after releasing the tool handle Hold onto the rem
19. the period with the UP or DOWN button and then use the SET to set the sample rate to the displayed value Duplex Mode The next parameter is the duplex mode indicated with U P L The duplex mode may be set to half duplex HALF or full duplex FULL With full duplex any commands received by the instrument via the serial interface are immediately echoed or transmitted back to the device of origin With half du plex the commands are executed but not echoed The default setting is full du plex The mode may be changed using the UP or DOWN buttons and pressing the SET button Linefeed The final parameter in the serial interface menu is the linefeed mode This pa rameter enables 9 n or disables 8 F F transmission of a linefeed charac ter LE ASCII 10 after transmission of any carriage return The default setting is with linefeed on The mode may be changed using the UP or DOWN buttons and pressing the SET button Serial Operation Once the cable has been attached and the interface set up properly the control ler immediately begins transmitting temperature readings at the programmed rate The set point and other commands may be sent to the instrument via the serial interface to set the temperature set point and to view or program the vari ous parameters The interface commands are discussed in Section 8 3 Interface Commands The serial interface operates with eight data bits one stop bit and no parity
20. unit has been powered ON the front panel LED display shows Rut o The instrument goes to 25 C and remains there until the SET button is pressed on the front panel starting the Auto Program After pressing the SET button the display changes to uu Rit and the Auto Program begins The instrument auto matically resets to 29 27 C at a scan rate of 0 2 C minute in accordance with the Auto Program see Figure 1 Generating the Melt Plateau and Removing the Inner Melt Heater Once the unit has stabilized at 29 27 C it waits for a minimum of 30 minutes to ensure that the gallium cell has equalized in temperature At the end of the equalization time the Auto Program begins to initiate the melt The display changes to Pr EP as the set temperature of the block is changed to 30 77 C This initiates a melt on the outer surfaces of the gallium within the cell A few minutes into the program the unit beeps four times and the display changes to a message that flashes between Pr EP and HEr on to indicate that the inner melt heater has been turned ON The inner melt heater remains ON for a few minutes then shuts off as the display changes back to Pr EP and the unit beeps 8 times The user should remove the inner melt heater at this time Note Damage does not occur to the gallium cell if the heater is not removed how ever a shortening of the melt duration may result After the inner melt heater has been powered OFF the instrument remains at 30 77 C f
21. well of the gallium cell When the user selects Auto by pressing the SET button the Model 9230 Auto Program begins a pre determined program to initiate and maintain a gallium melt pla teau While in the Auto Program mode the display shows the current process in the gallium melt cycle During this mode the user may not change those pa rameters which could negatively impact the gallium melt At the end of the plateau the unit properly refreezes the cell and returns the temperature to 25 C standby to await the next user initiated melt While in the manual mode of operation the LED front display panel continu ously shows the current well temperature The temperature may be easily set with the control buttons to any desired temperature within the specified range Certain parameters of the Auto Program itself may be adjusted in the manual mode of operation The Model 9230 was designed for high accuracy fixed point calibration meth ods and for ease of operation Through proper use the instrument will continu ously provide accurate calibration of temperature sensors and devices The user should be familiar with the safety guidelines and operating procedures of the instrument as described in this User s Guide 3 Specifications and Environmental Conditions Specifications 3 1 3 2 Specifications and Environmental Conditions Specifications Operating Range 15 C to 35 C 59 F to 95 F Gallium Cell Uncertainty
22. within the serial interface menu Calibration Parameters The operator of the instrument has access to one of the calibration constants RO This value is set at the factory and must not be altered The correct value is important to the accuracy and proper and safe operation of the instrument This parameter should not be adjusted except in the event the controller s memory fails The user may then restore this value to the factory setting This constant is supplied to the user on the Report of Calibration with the manual CAUTION DO NOT change the value of the instrument calibration con stant from the factory set value The correct setting of this parameter is important to the safety and proper operation of the instrument CAL Calibration parameters menu 47 9230 Maintenance System User s Guide 48 6 24 1 Press the SET button five times to enter the menu RO The calibration parameter RO characterizes the resistance temperature relation ship of the platinum control sensor This parameter may be adjusted by an ex perienced user to improve the accuracy of the instrument To properly maintain the gallium cell during the melt plateau and during the refreezing process the accuracy of the Model 9230 near the gallium melting point 29 7646 C must be very precise 0 05 C or better The value of RO for this instrument refers to the resistance of the control probe at 0 C For calibra tion purposes the value of RO is adj
23. 0 08mK typical Gallium Melting Plateau Duration 5 days typical Display Accuracy 0 05 C at 29 76 C Stability 0 02 C Display Resolution 0 01 C or F 0 001 C or F in program mode Display Scale C or F switchable Preheat Wells 2 wells 8 2 mm diameter Immersion Depth 152 mm 6 inches in gallium cell Vertical Gradient lt 0 03 C over 6 inches during cell maintenance Fault Protection Firmware protection Communications RS 232 included Ambient Temperature 18 C to 28 C 65 F to 82 F Power Requirements 115 VAC 10 60 Hz 1 0 A or 230 VAC 10 50 Hz 0 65 A 175 W maximum Exterior Dimensions 8 75 W x 10 25 D x 19 25 H 22 x 26 x 49 cm Weight 18 lb 8 2 kg without cell Environmental Conditions Although the instrument has been designed for optimum durability and trou ble free operation it must be handled with care The instrument should not be operated in an excessively dusty or dirty environment Maintenance and clean ing recommendations can be found in the Maintenance section of this manual The instrument operates safely under the following conditions e temperature range 18 28 C 65 82 F e ambient relative humidity 15 50 e pressure 75kPa 106kPa e mains voltage within 10 of nominal e vibrations in the calibration environment should be minimized e altitudes less than 2 000
24. 5P 50 j New sample period Press the SET button to store the new setting as the sample period or press the EXIT button briefly to skip to the next parameter without storing the new setting Duplex Mode The next parameter is the duplex mode The duplex mode may be set to full du plex or half duplex With full duplex any commands received by the instrument via the serial interface are immediately echoed or transmitted back to the device of origin With half duplex the commands are executed but not echoed dUPL Flashes before displaying serial duplex mode setting pP 6 Controller Operation Calibration Parameters 6 23 4 6 24 d HRLF j New duplex mode setting Press the SET button to store the new setting as the duplex mode or press the EXIT button briefly to skip to the next parameter without storing the new setting Linefeed The final parameter in the serial interface menu is the linefeed mode This pa rameter enables on or disables off transmission of a linefeed character LF ASCII 10 after transmission of any carriage return LF Flashes before displaying serial linefeed setting IES ped LF 0FF New linefeed setting a Press the SET button to store the new setting as the linefeed Prog 3 may be accessed by pressing the DOWN button The calibration menu may be accessed by pressing the UP button The well temperature is displayed by pressing the EXIT button Pressing the SET button accesses the parameters
25. 624 Calibration Parameters een 47 6 24 1 RO sini e eA GS Gb Halk oe qM dk bend X dT o Sa 48 7 Digital Communication Interface 49 7 1 Serial Communications o 49 TAA Wi s bo e ah oe m xo ae aa ele Ma eas ee ed e 49 TA2 Sep Bale a REIR hae Boge RAR A A 49 T 1 2 1 Baud Rates cui ias cee RUE Uu a aS Set EP Sc eee 50 TA2Z2 Sample Period unes ed dee Oa A RUE ee ES 51 TILAS Duplex Mode xa RR io o ROS ES Be SoS FCR RUSO So Ross 51 7 1234 JEinefeedi 4 2 i uo eteso a HR ig RE sa A Gla Shemale Ri A 51 7 1 3 Serial Operation s 44 4 dae ode c moe de de Rte ap d de ih eee ce 51 7 2 Interface Commands lens 51 8 Melting Point of Gallium Realization 55 8 1 General 4 0 eee ee ee XXE ES Ey Ed as 55 8 2 Preparing the Model 9230 to Receive the Gallium Cell 56 8 3 Preparing the Frozen Model 5943 Gallium Cell for Installation in the Model 0230 week cs RR RU x ees PR RSE Re EN Re 57 8 4 Installing the Frozen Model 5943 Gallium Cell into the Model 9230 57 8 5 Inserting the Top Insulation Plugs 58 8 6 Inserting the Inner Melt Heater o 58 8 7 Auto Program uuo E Re A E ue ed 58 8 7 1 Starting the Auto Program o ee 59 8 7 2 Generating the Melt Plateau and Removing the Inner Melt Heater 59 8 7 3 Calibrating Thermometers 0000000 bees 59 8 7 4 Advancing the Auto Program and Refreezing the Gallium Cell
26. EU OF ALL OTHER WARRANTIES EX PRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR USE HART SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAM AGES OR LOSS WHETHER IN CONTRACT TORT OR OTHERWISE 4 Quick Start in Auto Program Mode Unpacking 4 1 4 2 4 3 Quick Start in Auto Program Mode The user should read this user s guide and be familiar with the functional per formance of the Model 9230 before using the instrument to achieve a gallium melt plateau Unpacking Unpack the instrument carefully and inspect it for any damage that may have occurred during shipment If there is shipping damage notify the carrier imme diately Verify that the following components are present e Model 9230 Gallium Maintenance Apparatus e Melt heater e Power cord e User s Guide e Top Insulation Plugs e Cell Removal Tool If you are missing any item please call a Hart Scientific Authorized Service Center Set Up Place the instrument on a flat surface with at least 6 inches of free space around and 18 inches above the instrument Avoid drafty areas Install the power cord into the power entry module on the back of the instrument Plug the power cord into a grounded mains outlet Verify that the nominal voltage corresponds to that indicated on the back of the instrument Using the cell removal tool carefully insert the frozen
27. a Proportional Integral Derivative PID controller with specialized analog circuitry to control several Peltier devices The controlled Peltier devices provide the appropriate amount of heating or cooling to the block assembly into which the gallium cell is inserted The controller also con trols the inner melt heater cooling fan and beeper alarm Two preheat wells en sure that thermometers are properly warmed when inserted into the gallium cell The preheat wells are oversized so thermometers fit loosely and heat loss 55 9230 Maintenance System User s Guide 56 8 2 from the gallium cell is neither too sudden nor too severe when cold thermome ters are initially placed into the wells At the end of the melting plateau or when the user wishes to end the plateau the Auto Program is advanced When totally melted the Peltier devices are re configured and controlled such that a large temperature gradient is generated between the top and bottom of the block The instrument slowly scans to 0 C to maintain the gradient over several hours This ensures that the gallium cell is frozen from the bottom up In summary the following steps are involved in the realization of the melting point of gallium e Prepare the Model 9230 to receive the gallium cell e Prepare the frozen Model 5943 gallium cell to be installed in the Model 9230 e Install the frozen Model 5943 Stainless Steel Gallium Cell into the Model 9230 e Insert the top
28. ady temp rd y n rd 29 27 28 0 to 29 30 C Read prep melt temperature me me ee or eee Set prep melt temperature me n me 30 77 30 0 to 35 0 C Read prep scan rate ps ra ps Prepsrate 99 9 C or Prepsrate 0 2 F min C min Set prep scan rate ps ra n ps 0 2 0 1 to 0 5 C min Read beeper setting bee p bee beep ON OFF beep ON Set beeper bee p on of f bee off ON or OFF Read prep 1 duration prea prea Prep1dur 999 sec Prep1dur 360 Sec Set prep 1 duration prea n prea 400 360 to 600 sec Read prep 2 duration preb preb Prep2dur 999 sec Prep2dur 360 Sec Set prep 2 duration preb n preb 300 120 to 360 sec Read prep 3 duration prec prec Prep3dur 999 sec Prep3dur 360 Sec Set prep 3 duration prec n prec 400 240 to 480 sec Program 2 Read maintain temperature ma ma ma 99 999 C or F ma 29 86 C Set maintain temperature ma n ma 29 86 ris to 35 00 Read maintain duration dm dm dm 99999 dm 7200 Set maintain duration dm n OFF dm 1000 OFF 1 to 43200 min Read freeze hot temperature freh freh freezHtemp 99 99 C or freezHtemp 99 F 99 C or F Set freeze hot temperature freh n freh 35 00 hii to 36 00 Read freeze hot duration dfrh dfrh freezHdur 999 min freezHdur 150 Set freeze hot duration dfrh n dfrh 300 0 to 360 min Read freeze cold temperature fr ec fr freezCtemp 99 99 C or freezCtemp F 99 99 C or F 53 9230 Maintenance System User s Guide Command Returned Acceptable
29. ation of the melt plateau varies de pending on usage but lengths of 5 days or longer are achievable Refreezing the Gallium Cell At the end of the melt plateau or when the user wishes to end the plateau the Auto Program is advanced by pressing the SET and DOWN buttons press the SET button and keep it pressed and then press the DOWN button and release both on the front panel program advance The dislay will flash Ad U and display n n Rin E Use the UP and DOWN buttons to select the program state Fr EE2C then press the ENTER button See Section 6 21 2 Maintain Time out for optional user defined auto time out Gallium like water expands in volume when freezing Therefore the cell must be frozen from the bottom up or there is a potential for damage to the cell The Auto Program process en sures that the cell is properly refrozen The Auto Program initiates the freeze and the display shows Fr EEeE at this point The Peltier devices are reconfigured and controlled such that a large tem perature gradient is generated between the top and bottom of the block The in strument slowly scans to 0 C to maintain the gradient over several hours See Section 6 21 4 Freeze Hot Temperature for optional user defined freeze hot temperature Return to Standby Upon completion of the freeze the Auto Program returns the unit to 25 C the front panel LED display shows Aut o and the unit remains there until the user initiates the Auto Pr
30. ature 29 9230 Maintenance System User s Guide 30 6 13 6 14 6 15 6 16 Temperature Scale Units To toggle between C and F press and hold the SET button and then press the UP button when the temperature is displayed Secondary Menu Functions used less often are accessed within the secondary menu Press and hold the SET and EXIT buttons to access the secondary menu The first func tion in the secondary menu is the power display See Figure 6 on page 22 Peltier Device Power The temperature controller controls the temperature of the well by pulsing the Peltier devices ON and OFF The total power being applied to the Peltier de vices is determined by the duty cycle or the ratio of device on time to the pulse cycle time By knowing the amount of heating the user can tell if the instrument is heating up to the set point cooling down or controlling at a constant temper ature Monitoring the percent power lets the user know the stability of the well temperature With good control stability the percent heating power should not fluctuate more than 1 within one minute The device power display is accessed in the secondary menu Press and hold the SET and EXIT buttons The Peltier device power is displayed as a percent age of full power Flashes prior to displaying Peltier device power 5 0 P j Peltier device power in percent II TEN To exit out of the secondary menu press the EXIT button and hold for a b
31. ature value m WR RI SET Access the ready temperature parameter rdu Flashes before entering ready temperature N 23 810 Current ready temperature NRERESSERRRARENERENNESERENENERKEERE 89 300 i New ready temperature If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new ready temperature value and continue to Prep Melt Tem perature Prep Melt Temperature The Prep Melt Temperature parameter is the temperature at which the instru ment begins to melt the outer surfaces of the gallium within the gallium cell The default value is 30 77 C and can be seen on Figure as the temperature that the well goes to when the display shows Pr EP The instrument holds the well at this temperature for approximately 18 minutes the sum of Prep 1 Prep 2 and Prep 3 duration times to begin melting the outer surfaces of the gallium 35 9230 Maintenance System User s Guide 36 6 20 3 6 20 4 After accessing the Ready Temperature parameter the display flashes Pr EP E and displays the current value of the Prep Melt Temperature PrEP E j Flashes before entering prep melt temperature parameter 35 000 AO New prep melt temperature If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next paramet
32. by pressing the EXIT button Pressing the SET button accesses the pa rameters within the Prog 3 submenu Serial Interface Parameters The serial RS 232 interface parameters menu is indicated by SEriALl Serial RS 232 interface parameters menu O The serial interface parameters menu contains parameters which determine the operation of the serial interface The parameters in the menu are BAUD rate sample period duplex mode and linefeed 45 9230 Maintenance System User s Guide 46 6 23 1 6 23 2 6 23 3 BAUD Rate The BAUD rate is the first parameter in the menu The BAUD rate setting de termines the serial communications transmission rate The BAUD rate of the serial communications may be programmed to 300 600 1200 2400 4800 or 9600 The default setting is 2400 baud bRUd Flashes before displaying the serial baud rate setting Press the SET button to store the new setting as the baud rate or press the EXIT button briefly to skip to the next parameter without storing the new setting Sample Period The sample period is the next parameter in the serial interface parameter menu The sample period is the time period in seconds between temperature measure ments transmitted from the serial interface If the sample rate is set to 5 the in strument transmits the current measurement over the serial interface approximately every five seconds The automatic sampling is disabled with a sample period of 0
33. d the instrument goes into the Manual mode and begins to display the well temperature SET Accept Manual mode e5 00t Well temperature in degrees Celsius 6 Controller Operation Temperature Set point 6 9 6 9 1 6 9 2 Once in the Manual mode the temperature display function may be accessed from any other function by pressing and holding the EXIT button a few seconds Temperature Set point The temperature set point can be set to any value within the range and resolu tion as given in the specifications Be careful not to exceed the safe temperature limit of any device inserted into the well Setting the temperature involves selecting one of the eight 8 set points in memory and then adjusting the set point value Programmable Set points The controller stores eight 8 set point temperatures in memory The set points can be quickly recalled to conveniently set the instrument to a previously pro grammed temperature set point To set the temperature first select the set point memory This function is ac cessed from the temperature display function by pressing the SET button The number of the set point memory currently being used is shown at the left on the display followed by the current set point value e5 00t Well temperature in degrees Celsius SET Access set point memory i 25 Set point memory 1 25 0 C currently used NuAXRESSERRRASENENSKBRSEAER VEREEREN To change the set point memory to another preset valu
34. d sounds 16 audible beeps After accessing the Prep 2 Time parameter the display flashes dur 3 and dis plays the current value of the Prep 3 Time parameter Flashes before entering the prep 3 time parameter Current prep 3 time value 6 minutes 6 Controller Operation Prog 2 6 21 6 21 1 Use the UP or DOWN buttons to adjust the value SEC48O New prep 3 time value 8 minutes If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and to return to the Prog 1 submenu SET Accept new prep 3 time value and return to the prog I submenu Prob j Prog 1 submenu Press the UP button to access Prog 2 The well temperature is displayed by pressing the EXIT button Press the SET button to access the parameters within the Prog 1 submenu Prog 2 Prob eis displayed by pressing the UP button while the display shows Pr o6 Pressing the SET button then accesses the parameters within the Prog 2 submenu Prob Prog 1 submenu Select the Prog 2 submenu Prob e Prog 2 submenu A Pressing the DOWN button may access Prog 1 Pressing the UP button may ac cess Prog 3 The well temperature is displayed by pressing the EXIT button Pressing the SET button accesses the parameters within the Prog 2 submenu Maintain Temperature The Maintain Temperature parameter is the temperature at which the instru ment stabilizes and remains during the melt plateau in t
35. del 9230 8 3 8 4 Verify that the POWER switch is in the OFF position 0 Verify that the In ner Melt Heater switch is in the AUTO position Install the power cord into the power entry module on the back of the instrument and plug the cord into a mains outlet of the proper voltage frequency and current capability Turn on the power to the instrument by toggling the switch on the power entry module located on the back of the instrument The fan should begin blowing air through the instrument the beeper sounds one beep and the display illuminates after approximately 3 seconds After a brief self test the controller should begin normal operation the instrument will begin to approach 25 C and the display will show Auto Preparing the Frozen Model 5943 Gallium Cell for Installation in the Model 9230 Maintain the Model 5943 gallium cell at temperatures below the melting point 29 7646 C The cell must be frozen when installed in the Model 9230 Make sure that the outer surfaces and entrant well of the frozen Model 5943 gallium cell are clean and that the entrant well of the cell is clear of any foreign objects debris dirt or grit Use pure or reagent grade alcohol and clean soft cotton cloths to clean all surfaces if necessary Thoroughly dry the cell before continuing Add a small amount of silicone oil 200 05 or equivalent transfer fluid to the entrant well of the cell Do not overfill the entrant well The oil level in
36. e E i n ters These parameters are pro 9NC e 20DTR Figure 7 Serial Cable Wiring 49 9230 Maintenance System User s Guide grammed within the serial interface menu To enter the serial interface menu from the standby mode do the following SErIRL i Serial interface menu SET Access the serial interface parameters 7 1 2 1 Baud Rate 50 The baud rate is the first parameter in the menu The display prompts with the baud rate parameter by showing b RU d Press the SET button to choose to set the baud rate The current baud rate value is displayed The baud rate may be programmed to 300 600 1200 or 2400 baud The baud rate defaults to 2400 baud 7 Digital Communication Interface Interface Commands 7 1 2 2 7 1 2 3 7 1 2 4 7 2 Use the UP or DOWN buttons to change the baud rate value Press the SET button to set the baud to the new value or the EXIT button to abort the opera tion and skip to the next parameter in the menu Sample Period The sample period is the next parameter in the menu and prompted with SPEr The sample period is the time period in seconds between tempera ture measurements transmitted from the serial interface If the sample rate is set to 5 the instrument transmits the current measurement over the serial interface approximately every five seconds The automatic sampling is disabled with a sample period of 0 Press the SET button to choose to set the sample period Adjust
37. e If it measures close to this make sure that it is securely re connected to the controller replace the panels and reapply power to the in strument If the error message returns there is a problem with the controller The display shows Err 8 Improper freezing The Auto Program of the instrument is designed to monitor power levels and scan rates during the freezing cycle If an unacceptable level or rate is detected the unit will show Ec 8 and the beeper alarm will sound To prevent any damage from occurring to the cell remove it immediately and freeze it manually To freeze manually place the lower 1 3 of the cell in an ice bath with the top 2 3 exposed to the ambient air for approximately one hour un til the cell freezes The instrument may be reset by pressing any of the front panel buttons but if the error message continues the unacceptable freeze conditions are still present Power the unit OFF and wait a few minutes Then power the unit ON and reset the instrument by pressing any of the front panel buttons to see if the problem has been eliminated After starting the Auto Program the display shows uu fit and does n t go into Pr EP Ambient temperature may be changing too rapidly Rapid changes in the ambient temperature of more than 1 0 C reduce the stability of the instru ment The Auto Program monitors the stability of the block at 29 27 C and if it is too unstable the melt does not proceed Check the ambient tempe
38. e press the UP or DOWN button 4 30 New set point memory 4 30 0 C A Press the SET button to display the new selection and access the set point value Display selected set point memory 23 86 j New set point value 29 86 C ped Set point Value If the set point value is correct hold the EXIT button to accept the new value and resume displaying the well temperature Otherwise press the UP or DOWN button to adjust the set point value 27 9230 Maintenance System User s Guide 28 6 10 ee 080 New set point value When the desired set point value is reached press the SET button to accept the new value and to access the temperature scale units If the EXIT button is pressed any changes made to the set point are ignored SET Accept new set point value The default programmable set points factory set are given in Table 2 Table 2 Default Programmable Set points Factory Set Set point Memory X Default Set point Temperature C Number 25 00 29 27 30 77 29 86 35 00 00 00 10 00 20 00 coo N O 01 c n A NOTE Setpoint 1 will always be set back to 25 00 C af ter the power has been cycled off then on Temperature Scale Units The temperature scale units of the controller can be set by the user to degrees Celsius C or Fahrenheit F The units are used in displaying the well tem perature set point scan rate and proportional band Press the SET b
39. er SET Accept new Prep Melt Temperature value and continue to the Prep Scan Rate Prep Scan Rate The Prep Scan Rate parameter is the rate in C minute or F minute at which the instrument scans from the Ready Temperature to the Prep Melt Tempera ture The default value is 0 2 C minute and can be seen on Figure 1 where the unit begins the melt After accessing the Prep Melt Temperature parameter the display flashes PrEP Sr and displays the current value of the Prep Scan Rate Flashes before entering prep scan rate parameter New prep scan rate If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new prep scan rate value and continue to the inner melt heater Beeper Beeper The Beeper parameter is used to enable or disable the audible warnings that may be generated during the initiation of the melt The default value is ON 6 Controller Operation Prog 1 6 20 5 As seen on Figure 1 the Auto Program sounds an audible beep 4 times when it energizes the inner melt heater and the display shows an alternating message from Pr EP to Htr on After approximately 4 minutes the Auto Program sounds an audible beep 8 times and turns the inner melt heater OFF the display returns Pr EP After approximately 6 more minutes the Auto Program sounds an audible beep 16 times and displays nn Aint an indication
40. ery uniform tem perature when maintaining a melting cell Inner Melt Heater Storage Well Preheat Wells Cooling Air Vents Top Insulation Plugs Constant Temperature Block Assembly with Gallium Cell 9230 GALLIUM MAINTENANCE APPARATUS 15 C to 30 C Figure 4 Top Panel 17 9230 Maintenance System User s Guide 5 4 5 5 2 The inner melt heater is a low power heater that creates an inner liquid layer next to the reentrant tube of the gallium cell during the melting process This inner melt heater is controlled automatically by the microprocessor when using the Auto Program mode or may be used manually with the switch in back When not in use the inner melt heater is stored in the well at the back of the unit to prevent it from causing any damage 3 The thermometer preheat wells are located at the back of the block access well Thermometers are preheated in these wells prior to insertion into the cell in order to conserve its latent energy 4 The cooling air vents in the top of the unit permit heated air to exit the unit 5 The top insulation plugs fit into the well over the gallium cell See Section 8 5 Inserting the Top Insulation Plugs Rear Panel The rear panel consists of the power connection power switch melt heater switch inner melt heater connection and serial port See Figure 5 1 The power connection is where the power cord plugs into the back of the instrument 2 Set the power switch
41. es are reconfigured and controlled such that a large tempera ture gradient is generated between the top and bottom of the block The instru ment slowly scans from 29 86 C to 0 C to maintain the gradient over several hours thus ensuring the cell freezes properly beginning at the bottom and con tinuing up to the top of the cell 6 Controller Operation Return to Standby 6 5 See Section 6 21 2 Maintain Time out for optional user defined auto time out an optional method of ending the melt plateau and initiating the refreeze pro cess See Section 6 21 4 Freeze Hot Temperature for optional user defined freeze hot temperature a method to totally melt the cell before freezing it Return to Standby Upon completion of the freeze the Auto Program returns the unit to 25 C the digital LED display shows Roto io Instrument returning to 25 C a After reaching 25 C the unit remains there until the user initiates the Auto Pro gram again by pressing the SET button or goes into the Manual mode of Operation Program Advance From the manual mode the program advance function allows the user to return to the standby condition T com Access program advance Adu i Adu flashes and then displays program mode a rere rereter rete Auto Program mode Press the UP or DOWN button to toggle between the Auto Program and Man ual mode SET Accepts the new operation At any time during the auto program the user may pre
42. eters and access and set calibration parameters Setting the control temperature is done directly in degrees of the current scale and can be set to 0 01 of a degree Celsius or Fahrenheit During the Manual mode of operation the functions of the buttons are as follows SET Used to display the next parameter in the menu and to store parameters to the displayed value DOWN Used to decrement the displayed value of parameters UP Used to increment the displayed value EXIT Used to exit a function and to skip to the next function Any changes made to the displayed value are ignored Holding the EXIT button for about 1 2 second returns control to the main display 9230 GALLIUM MAINTENANCE APPARATUS 15 C to 30 C 1 Hart Scientific SET DOWN UP EXIT LY OOC Figure 3 Front Panel 5 Parts and Controls Top Panel 5 3 Top Panel The primary feature of the top of the unit is to provide access to the tempera ture controlled block The top panel consists of the constant temperature block assembly two preheat wells top insulation plug cooling air vents the melt heater and melt heater storage well See Figure 4 1 The constant temperature block assembly is where the gallium cell is in serted Peltier devices surround the cell in order to provide a uniform tempera ture These devices can be configured by the controller to provide a large vertical gradient during the freezing of the gallium cell or a v
43. ew maintain time out setting If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new maintain time out setting and continue to the maintain time out time Maintain Time out Time The Maintain Time out Time parameter is the time that the instrument main tains the gallium cell at the Maintain Temperature before terminating the gal 6 Controller Operation Prog 2 6 21 4 lium melt plateau The default value is 7200 minutes 5 days It is only used if the Maintain Time out parameter is set to ON If the Time out parameter is set to ON the instrument ends the Maintain portion of the Auto Program after the Maintain Time out Time has been reached and refreezes the gallium cell It can be seen on Figure 1 under the Maintain portion of the Auto Program After accessing the Maintain Time out parameter the display flashes dur 4 and displays the current value of the Maintain Time out Time dur 4 Flashes before maintain time out time parameter 1440 New maintain time out time value 1440 minutes If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new maintain time out time value and continue to the freeze hot temperature Freeze Hot Temperature After the melt plateau is finished
44. f the functions and parameters is shown in the flowchart in Figure 6 on page 22 This chart may be copied for reference In the following discussion a button with the word SET UP DOWN or EXIT inside indicates the panel button while the dotted box indicates the display reading Explanation of the button or display reading are to the right of each button or display value When two buttons are shown to initiate an action for example ser com Press and hold the first button e g SET and then press the second button e g DOWN and release both Standby After the instrument is powered ON or at the end of a gallium cell refreeze pro cess the unit automatically is set to 25 C and the digital LED display reads Auto j Ready to Start Auto Program pel The unit is in a Standby condition and remains at 25 C indefinitely until the user initiates a change by pressing a button sequence Starting the Auto Program The user begins the Auto Program by pressing the SET button Start the Auto Program vuAle WAIT Auto Program started in 21 9230 Maintenance System User s Guide a UT
45. he gallium cell The de fault value is 29 86 C and can be seen on Figure 1 as the temperature that the well goes to when the display shows nn Aint The instrument holds the well at this temperature until the melt plateau is ended Prog 2 submenu nnRinE Flashes before entering the maintain temperature lagu ue Summer 39 9230 Maintenance System User s Guide 40 6 21 2 6 21 3 89 190 New maintain temperature value If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new maintain temperature value and continue to the main tain time out Maintain Time out The Maintain Time out setting is used to enable a preset delay time after which the gallium melt plateau is terminated The default setting is OFF and at this setting the instrument remains at the Maintain Temperature until the user ad vances the Auto Program by depressing the SET and DOWN buttons and then selecting the Fr EE2C program state A refreeze of the gallium cell is then started If the Maintain Time out setting is ON the Auto Program automatically ends the gallium melt plateau after the preset delay time has been reached and refreezes the gallium cell It can be seen on Figure 1 under the Maintain portion of the Auto Program After accessing the Maintain Temperature parameter the display flashes t out and displays n E N
46. he parameter value Press the SET button again to accept and store Adjust Adjust Freeze the new value and to advance to the next parameter Prep 2 Time Cold Temperature e Press the EXIT button briefly to skip a parameter without storing the parameter value v Y Hold the EXIT button to exit the menu and to display the temperature Aus Up Press the SET and DOWN b he same time to advance th AUTO mod Prep 3 Time Cold Scan Rate Press the SET and DO uttons at the same time to advance the program to AUTO mode While in AUTO Mode Adiust Freeze Press the EXIT and UP buttons to momentarily display the block temperature Cold Time e The AUTO Mode parameters may be viewed but no changes are allowed except for the beeper and serial interface parameters Figure 6 Controller Flowchart 22 see Figure see Figure Plateau 6 Controller Operation Auto Program Initiating and Maintaining the Gallium Melt 6 3 At this point the Auto Program takes control of the instrument and initiates a melt in the gallium cell in accordance with Figure 1 on page 13 and Figure 6 on page 22 At any time the user may press the program advance button sequence to access the program advance mode t com Access program advance tofuto Exit from auto mode From here the set button can be pressed to go back to the Auto state or press the up or down buttons to choose a different program state Once the desired program state i
47. he proper temperature with thermoelectric Peltier devices 3 The gallium cell is placed into the block Use the removal tool to carefully insert or remove the cell WARNING DO NOT use the removal tool to carry the cell 4 The top insulation plugs are placed over the gallium cell to help maintain the proper temperature See Section 8 5 Inserting the Top Insulation Plugs 6 Controller Operation Standby 6 1 6 2 Controller Operation This section discusses in detail how to operate the instrument temperature con troller using the front control panel By using the front panel key switches and LED display the user may initiate the Auto Program mode a microproces sor controlled program that determines set temperatures scan rates duration times Peltier module configurations and melt heater controls By controlling all of these parameters in the proper order a temperature profile can be main tained in the block assembly that assures a uniform melt maintains the melt over long periods of time properly refreezes the cell and keeps the cell ready for the next melt cycle After selecting the Manual mode of operation the user may monitor the well temperature adjust the set point temperature in degrees C or F monitor the Peltier device output power adjust the controller propor tional band and program the operating parameters program parameters serial interface configuration and the controller calibration parameters Operation o
48. l Table1 International Electrical Symbols Symbol Description AC AC DC Battery CE DC Double Insulated Electric Shock Fuse PE Ground Hot Surface Read the User s Manual Off On O I eoi 9230 Maintenance System User s Guide 1 2 1 2 1 amp Canadian Standards Association c us C TIC Australian EMC Mark OVERVOLTAGE Installation CATEGORY II Pollution Degree 2 per IEC1010 1 re CATI fers to the level of Impulse Withstand Voltage protection provided Equipment of OVERVOLTAGE CATEGORY II is energy consuming equipment to be supplied from the fixed installation Examples include household office and laboratory appliances Y The European Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC mark E Safety Information Use of this instrument other than as specified in this manual may impair the protection provided by the instrument The following definitions apply to the terms Warning and Caution e WARNING identifies conditions and actions that may pose hazards to the user e CAUTION identifies conditions and actions that may damage the in strument being used WARNINGS To avoid possible electric shock or personal injury follow these guidelines BURN HAZARD DO NOT leave the melt heater outside of the unit and en ergized The melt heater can reach approximately 110 C if not properly in serted into the unit Place
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50. lect the next program state Press SET to start the program See Section 6 21 2 Maintain Time out for optional user de fined Auto Time Out Gallium like water expands in volume when freezing Therefore the cell must be frozen from the bottom up or there is a potential for damage to the cell The Auto Program process ensures that the cell is properly refrozen The Auto Program initiates the freeze and the display shows Fr EE2 at this point The Peltier devices are reconfigured and controlled such that a large tem perature gradient is generated between the top and bottom of the block The in strument slowly scans to 0 C to maintain the gradient over several hours Return to Standby Upon completion of the freeze the Auto Program returns the unit to 25 C the front panel LED display shows Auto and the unit remains there until the user initiates the Auto Program again by pressing the SET key 9 Calibration Procedure Calibration Equipment Calibration Procedure To properly maintain the gallium cell during the melting plateau and during the refreezing process the accuracy of the Model 9230 near the gallium melting point 29 7646 C must be very precise 0 05 C or better To achieve this the instrument must be calibrated near this temperature The value of RO for this instrument refers to the resistance of the control probe at 0 C For calibration purposes the value of RO is adjusted to compensate for the error at 29 27 C The
51. llium cell at the Freeze Cold Temperature to totally refreeze the gallium in the cell The default value is 150 minutes 2 5 hours At the end of 43 9230 Maintenance System User s Guide 44 6 22 6 22 1 this time the Auto Program returns the well to 25 C to wait for the next melt process After accessing the Freeze Cold Scan Rate parameter the display flashes dur 5 and displays the current value of the Freeze Cold Time parameter dur 5 Flashes before entering the freeze cold time parameter NUSESVNREERARSENENSKREEEXKE UE REESE cl 180 New freeze cold time value 180 minutes If no changes are desired press the EXIT button to Prog 1 submenu Press the SET button to accept the new value and continue on to the next parameter SET Accept new freeze cold time value and continue to the Prog 2 submenu Prog 1 may be accessed by pressing the DOWN button Prog 3 may be ac cessed by pressing the UP button The well temperature is displayed by press ing the EXIT button Pressing the SET button accesses the parameters within the Prog 2 submenu Prog 3 Prob 3is displayed by pressing the UP button while the display shows Pr o6 2 Pressing the SET button then accesses the parameters within the Prog 3 submenu Prob e Prog 2 submenu Select the Prog 3 submenu Prob 3 Prog 3 submenu a Prog 2 may be accessed by pressing the DOWN button The serial interface menu may be accessed by pressing the UP button The well tempera
52. mber e Voltage e Complete description of the problem 2 Introduction Introduction The 9230 is a specialized instrument for the realization of the gallium melting point 29 7646 C The instrument works with Hart s 5943 stainless steel Ga cell to provide melting plateaus that can last a week or longer This instru ment is intended for Calibration Laboratory use and not for field applications Internal programming of the micro processor controller provides prepro grammed scan rates set points for each step in the process dwell timing and indication that the next step is ready The Model 9230 is available in 100 230 VAC 10 50 60 Hz Built in programmable features include e Temperature scan rate control e Fixed point programming with default settings for the gallium cell e Eight set point memories e Adjustable readout in C or F The temperature is accurately controlled by Hart s special proportional inte gral derivative PID digital controller The controller uses a platinum RTD as a sensor and controls the well temperature with thermoelectric Peltier devices After properly inserting a frozen Ga cell and powering the unit on the Model 9230 controller sets the block temperature to 25 C and the LED front panel dis play shows Auto The user then makes sure that the inner melt heater is at tached to the back of the unit the melt heater switch is in the Auto position and inserts the melt heater into the entrant
53. meters 9230 Maintenance System User s Guide 3 3 Warranty Hart Scientific Inc Hart warrants this product to be free from defects in ma terial and workmanship under normal use and service for a period as stated in the current product catalog from the date of shipment This warranty extends only to the original purchaser and shall not apply to any product which in Hart s sole opinion has been subject to misuse alteration abuse or abnormal conditions of operation or handling Software is warranted to operate in accordance with its programmed instruc tions on appropriate Hart products It is not warranted to be error free Hart s obligation under this warranty is limited to repair or replacement of a product which is returned to Hart within the warranty period and is determined upon examination by Hart to be defective If Hart determines that the defect or malfunction has been caused by misuse alteration abuse or abnormal condi tions or operation or handling Hart will repair the product and bill the pur chaser for the reasonable cost of repair To exercise this warranty the purchaser must forward the product after calling or writing a Hart Scientific Authorized Service Center for authorization Hart assumes NO risk for in transit damage For service or assistance please contact a Hart Scientific Authorized Service Center see Section 1 3 THE FOREGOING WARRANTY IS PURCHASER S SOLE AND EXCLU SIVE REMEDY AND IS IN LI
54. meters 32 6 19 Auto Program Configuration Parameters 33 620 Prog Lo excess any e he Dee ge ee ee eo Pu dou 34 6 20 1 Ready Temperature 64x is A a NOR Ge scere WU E CS 35 6 20 2 Prep Melt Temperature s e sse dk En ke a ee SS 35 6 20 3 Prep Scan Rat sidad era 36 6 20 4 B epet sco za iaa a a A oe a SB ce Pd 36 6 20 5 Prep Tis e da a e bares de ewe ii oe d hw ot a Y 37 6 20 6 Prep 2 Tims 2 9 sen 14s ae qve Pa Bead HO Pe ES 38 6 20 7 Prep S Ti ds 3e d dirus don dd ede amp Sead dodo deb ede 38 6 2 Prog Za sudes Sg eee eee Swe I QUORUM cies e dg ads 39 621 1 Maintain Temperature 39 6 21 2 Maintain Time 0ut s cee os eid a Ses oo ede ae a eha a RR Ene TRU e 40 6 21 3 Maintain Timeout Times a s uo o edo omo de a x Reg 40 6 21 4 Freeze Hot Temperature 4 420 xg e mao De a HR RO X Rod 41 6 21 5 Freeze Hot Time ura bef tae b dee dun Bisco Pd dorm b Reed ed 42 6 21 6 Freeze Cold Temperature s uud c y vo xo ee OO XC ey x 42 6 21 7 Ereeze Cold Scan Rate 2022 oS a Ae up wok ae NU Wen 43 6 21 8 Freeze Colds Times uon t oet Baie ce HORS RE d Ge es 43 622 PROPS v oes cR E RR LR ESSA Be ee 44 6 22 1 Freeze Melt State rro rs a Up E ade 44 6 23 Serial Interface Parameters 45 6 23 1 BAUD Rale su ids p 39 e a a Be Pep ds da 46 6 23 2 Sample Period x use de de BL des e ds As 46 6 23 3 D plex Mod s4 odo arene wane es b e ee wie CR ec 46 6 23 4 Tanefeedis v vos ita a dise Ll eor P is Sede iaa 47
55. mperature bunc ue parameter 0 000 Current freeze cold temperature value O 5 000 New freeze cold temperature value If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new freeze cold temperature value and continue to the freeze cold scan rate Freeze Cold Scan Rate The Freeze Cold Scan Rate parameter is the rate in C minute or F minute at which the instrument scans from the Freeze Hot Temperature to the Freeze Cold Temperature The default value is 0 5 C minute and can be seen on Figure 1 where the unit begins to refreeze the gallium cell This parameter is very im portant for the proper gradient to be maintained during the refreeze process After accessing the Freeze Cold Temperature parameter the display flashes Fr EL Sr and displays the current value of the Freeze Cold Scan Rate FrECSre Flashes before entering the freeze cold scan rate parameter ara A Sr 0 6 New freeze cold scan rate NIRPRPREIERIRSIRRR PARIS ERRSSERARERIA If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new freeze cold scan rate value and continue to the Freeze Cold Time Freeze Cold Time The Freeze Cold Time parameter is the time that the instrument scans to and maintains the ga
56. ogram again by pressing the SET button 5 Parts and Controls Bottom Panel 5 1 Parts and Controls The user should become familiar with the Model 9230 parts Successful use of the instrument is dependent upon knowledge of important components and their proper use Bottom Panel On the bottom panel are the fan and feet See Figure 2 1 The cooling fan inlet is at the bottom of the unit The cooling air circulating through the instrument keeps the electronics and the chassis cool Keep the area immediately around the instrument clear to allow adequate ventilation 2 Three feet support the chassis permitting air space for the fan Foot Figure 2 Bottom Panel 15 9230 Maintenance System User s Guide 16 5 2 Front Panel The front panel contains the digital display and the controller keypad See Fig ure 3 1 The digital display is an important part of the temperature controller because it not only displays set and actual temperatures but also displays various instru ment functions settings and constants The display shows temperatures in units according to the selected scale C or F When in the Auto Program mode the display indicates the current status of the unit in the gallium melt process 2 The four button controller keypad allows easy setting of the set point tem perature The control buttons SET DOWN UP and EXIT are used to set the temperature set point access and set other operating param
57. on to the next parameter SET Accept new prep 1 time value and continue to prep 2 time Prep 2 Time After energizing the inner melt heater during the initialization of the gallium melt see Figure 1 the Auto Program waits a short time before turning OFF the inner melt heater The Prep 2 Time parameter specifies this time in seconds The default value is 240 seconds 4 minutes At the end of this time the Auto Program turns the inner melt heater OFF and sounds 8 audible beeps After accessing the Prep 1 Time parameter the display flashes dur 2 and dis plays the current value of the Prep 2 Time parameter Flashes before entering the prep 2 time parameter New prep 2 time value 6 minutes If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new prep 2 time value and continue to prep 3 time Prep 3 Time After turning OFF the inner melt heater during the initialization of the gallium melt see Figure 1 the Auto Program waits a short time before beginning the maintenance process of the gallium melt plateau During this time the instru ment remains at 30 77 C to complete the melting of the outer surfaces of the gallium in the cell The Prep 3 Time parameter specifies this time in seconds The default value is 360 seconds 6 minutes At the end of this time the Auto Program begins the maintenance process an
58. oper order a temperature profile can be maintained in the block assembly that assures a uniform melt maintains the melt over long periods of time properly refreezes the cell and keeps the cell ready for the next melt cycle The Auto Program is illustrated in Figure 1 Starting the Auto Program After the frozen gallium cell is properly installed in the instrument See Section 9 Melting Point of Gallium Realization for more details and the unit is pow ered ON the front panel LED display shows Aut o The instrument goes to 25 C and remains there until the SET button on the front panel is pressed which starts the Auto Program The display changes to uu Ait and the Auto Program begins The unit resets to 29 27 C at a scan rate of 0 2 C minute in ac cordance with the Auto Program see Figure 1 Generating the Melt Plateau Once the unit has stabilized at 29 27 C it waits for a minimum of 30 minutes to ensure that the gallium cell has equalized in temperature At the end of the equalization time the Auto Program begins to initiate the melt The display changes to Pr EP as the set temperature of the block is changed to 30 77 C This initiates a melt on the outer surfaces of the gallium within the cell A few minutes into the program the unit beeps four times and the display changes to a message that flashes between Pr EP and htr on to indicate that the inner melt heater has been turned ON The inner melt heater remains ON for a few minute
59. or a few more minutes to complete the outer melt of the gallium cell The unit then beeps 16 times the display changes from PrEP to n nfiinT and the block temperature resets to 29 86 C to maintain the melting gallium cell Calibrating Thermometers After the melt has been initiated a preheated monitor thermometer may be in serted to monitor the temperature of the gallium cell Due to the heat applied to the cell by the inner melt heater the temperature of the cell s entrant well is higher than the gallium melting point 29 7646 C for a short period of time Generally after 30 to 60 minutes the temperature of the cell s entrant well is sufficiently stable to begin calibrations of thermometer sensors The duration of the melt plateau varies depending on usage but lengths of 5 days or longer are achievable The two preheat wells in the block may be used to heat up the thermometers before inserting them into the cell The preheat wells are slightly oversized so thermometers fit loosely and heat loss from the gallium cell is neither too sud den nor too severe when cold thermometers are initially placed in the preheat wells 59 9230 Maintenance System User s Guide 60 8 7 4 8 7 5 Advancing the Auto Program and Refreezing the Gallium Cell At the end of the melt plateau or when the user wishes to end the plateau the Auto Program is advanced by pressing the SET and DOWN buttons and then using the UP and DOWN buttons to se
60. or the user has ended the melt the instrument normally proceeds to refreeze the cell If desired the Freeze Hot Temperature and Freeze Hot Time parameters may be used to preset the instrument to totally melt the cell before refreezing The Freeze Hot Temperature parameter is the temperature at which the instru ment totally melts the gallium in the cell The value can be set up to 36 00 C and can be seen on Figure 1 as the temperature that the well goes to when the display shows Fr EE2H The instrument holds the well at this temperature for up to 6 0 hours to ensure that all of the gallium has been melted before refreezing the cell After accessing the Maintain Time out Time parameter the display flashes Fr EE2H and displays the current value of the Freeze Hot Temperature FrEE2H Flashes before entering the freeze hot temperature Pct uu E parameter 23 06 Current freeze hot temperature value Use the UP or DOWN buttons to adjust the value 41 9230 Maintenance System User s Guide 42 6 21 5 6 21 6 36 00 New freeze hot temperature value If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter SET Accept new freeze hot temperature value and continue to the freeze hot time Freeze Hot Time The Freeze Hot Time parameter is the time that the instrument maintains the gallium cell at the Freeze Hot Temperat
61. oval tool with the other hand and gently lower the cell with the tool the rest of the way while carefully releasing the grip on the outside of the cell When the cell is securely lowered into the Model 9230 well compress the removal tool handle to loosen the rubber tip and gently remove the tool from the cell s entrant well The gal lium cell is now installed in the Model 9230 Inserting the Top Insulation Plugs The instrument comes with 4 rubber insulation plugs to be inserted into the Model 9230 well on top of the cell 2 spares The plugs have a hole in the cen ter through which thermometers can be inserted The plugs serve two purposes First they help ensure an even temperature profile in the block and cell allow ing a longer lasting and more accurate melting point realization Second they protect against excessive moisture condensation during the cell refreezing pro cess Condensation can lead to corrosion over the long term and freezing water can damage the block Firmly insert two insulation plugs into the Model 9230 well on top of the cell Make sure that they are positioned such that the center holes are aligned with the entrant well of the gallium cell Inserting the Inner Melt Heater The inner melt heater s function is to melt a small volume of gallium around the entrant well of the cell when initiating the melt The recommended practice for realizing the gallium melt by national standards laboratories requires two solid liq
62. over fairly long distances With the serial interface the user may access any of the functions parameters and settings discussed in Sec tion 7 Controller Operation with the exception of the BAUD rate setting Addi tionally when the instrument is in Standby mode well at 25 C and display shows Aut o the user is required to use the front panel buttons to enter Man ual mode or to initiate the Auto Program The serial interface operates with eight data bits one stop bit and no parity Wiring RS 232 Cable Wiring for The serial communications ca IBM PC and Compatibles ble attaches to the instrument through the DB 9 connector at x Instrument Computer DTE the back of the instrument Fig Connector Connector DB 9 Pi DB 9 Pi ure 7 shows the pin out of this oin Perrin 1NC m 1DCD connector and suggested cable 2 RxD 2 RxD wiring To eliminate noise the 3TxD E 3TxD 4NC 4 DTR serial cable should be shielded s GND gt E GNI with low resistance between the 6NC 6 DSR connector DB 9 and the o sius shield If the instrument is used 9NC 9NC in a heavy industrial setting the serial cable must be limited to one meter in length Instrument Computer DTE Connector Connector DB 9 Pin DB 25 Pin Setup 1NC 2RxD e 2TxD Before operation the serial in 3TxD 3RxD terface must first be set up by xui la programming the BAUD rate 6NC XK E 6 DSR and other configuration param
63. power Flashes Sr Set point Resistance and then displays the setting Resistance in ohms Flashes Pr oP and then displays the setting 3 0 New proportional band setting O To store the new setting press the SET button Press the EXIT button to con tinue without storing the new value Accept the new proportional band setting Controller Configuration Operating and Calibration Parameters The controller has a number of configuration operating and calibration param eters that are programmable via the front panel The first set of parameters is associated with the Auto Program and is located under the configuration submenus called Prob ProG 2 and Prof 3 The next set of parameters is 6 Controller Operation Auto Program Configuration Parameters 6 19 associated with the serial RS 232 interface and is located under the configura tion submenu called SEr AL The last set of parameters is associated with the calibration of the instrument and is located under the configuration submenu called CAL Auto Program Configuration Parameters CAUTION The Auto Program configuration parameters should not be adjusted under normal use These parameters directly affect the melt pla teau duration time and proper freezing of the gallium cell The first set of parameters is associated with the Auto Program see Figure 1 page 13 The Auto Program is a microprocessor controlled program that deter mines set temperature
64. rature around the instrument for rapid changes Avoid drafty areas Comments EMC Directive Hart Scientifics equipment has been tested to meet the European Electromag netic Compatibility Directive EMC Directive 89 336 EEC The Declaration of Conformity for your instrument lists the specific standards to which the unit was tested Low Voltage Directive Safety In order to comply with the European Low Voltage Directive 73 23 EEC Hart Scientific equipment has been designed to meet the IEC 1010 1 EN 61010 1 and the IEC 1010 2 010 EN 61010 2 010 standards
65. rief moment To continue on to the proportional band setting function press the EXIT button momentarily or the SET button Set point Resistance The set point resistance is the resistance associated with the set point tempera ture Allow the temperature to stabilize at the desired set point before using the 6 Controller Operation Proportional Band 6 17 displayed resistance value The set point resistance function is available for di agnostic purposes Press the SET and EXIT buttons to enter the secondary menu and show the heater power Then press the SET button twice to access the set point EN ex Access Peltier device power in secondary menu Flashes and then percent power flashes Flashes prior to displaying Peltier device power SET Access set point resistance Sr i Flashes Sc Set point Resistance and then displays the E seti t 109 115 i Resistance in ohms Proportional Band In a proportional controller such as this the Peltier device output power is pro portional to the well temperature over a limited range of temperatures around the set point This range of temperature is called the proportional band At the bottom of the proportional band the Peltier device output is 10096 At the top of the proportional band the Peltier device output is 0 Thus as the temperature rises the Peltier device power is reduced which consequently tends to lower the temperature back down In this way the temperature i
66. s scan rates duration times Peltier module configura tions and melt heater controls By controlling all of these parameters in the proper order a temperature profile can be maintained in the block assembly that assures a uniform melt maintains the melt over long periods of time prop erly refreezes the cell and keeps the cell ready for the next melt cycle The de 33 9230 Maintenance System User s Guide fault programmable set points factory set are given in Table 3 along with minimum and maximum set values Table 3 Auto Program Parameters Prog 1 Prog 2 Prog 3 Low Default High Parameter Name Parameter Value Value Value Units Prog Set Resolution Ready Temperature WAIT rdu E 29 000 29 270 29 300 C 1 XX XXX Prep Melt Temperature PREP PrEPE 30 000 30 770 35 000 C 1 XX XXX Prep Scan Rate PREP PrEPSr 0 1 0 2 0 5 C min 1 X X Beeper PREP bEEPEr ON 1 ON OFF Prep 1 Time PREP dur 360 480 600 Sec 1 Xxx Prep 2 Time PREP dur 2 120 240 360 sec 1 XXX Prep 3 Time PREP dur 3 240 360 480 sec 1 XXX Maintain Temperature MAINT nnfint 29 790 29 860 35 000 C 2 XX XXX Maintain Time out MAINT Er ovut OFF 2 ON OFF Maintain Time out Time MAINT dur Y 1 7200 43 200 min 2 XX XXX Freeze Hot Temperature FREEZH Fr EEH 29 860 29 860 36 000 C 2 XX XXX Freeze Hot Time FREEZH dur 5 0 0 360 min 2 XXX Freeze Cold Temperature FREEZC Fc EE2C 1 000 0 000 10 000
67. s and then shuts off as the display changes back to Pr EP and the unit beeps eight times The user should remove the inner melt heater at this time Note No damage occurs to the gallium cell if the heater is not removed how ever a shortening of the melt duration may result After the inner melt heater is powered OFF the instrument remains at 30 77 C for a few more minutes to complete the outer melt of the gallium cell The unit then beeps 16 times the display changes from Pr EP to nn Aint and the block temperature resets to 29 86 C to maintain the melting gallium cell The user may then insert a preheated monitor thermometer to monitor the tem perature of the gallium cell Due to the heat applied to the cell by the inner melt heater the temperature of the cell s entrant well is higher than the gallium melt ing point 29 7646 C for a short period of time Generally after 30 to 60 min utes the temperature of the cell s entrant well is sufficiently stable to begin Auto Program 4 Quick Start in Auto Program Mode 9AO0 9je5Ipul Se SUI 440 440 440 440 440 330 qe peyeo pul IL w y a 138 wesbold benuyjew L nuyeur nes nea nea ayi Bulouenpe NIVILLT3W Aq owg tiv ou LNIVWLTAN LNIVW LT4 Cuenta bor CNV Ouz Suunp 9482 epon Omuz Na 139 wesBoid ey rats W iqpuejs oj wnes UMUO ZO MS pueuriboldomy UR O ZO MS rues ael OPO d
68. s chosen press SET to accept the chosen state SET Accept the program state The chosen program state will now start Auto Program Initiating and Maintaining the Gallium Melt Plateau Approximately 55 65 minutes after starting the Auto Program the gallium cell reaches 29 27 C and stabilizes enough to start the melt plateau The display shows PrEP j PrEP gallium cell melt initiated The Auto Program takes the block assembly to 30 77 C which begins melting the outer surface of the gallium inside the cell After approximately 8 minutes the Auto Program energizes the inner melt heater inside the gallium cell entrant well The instrument sounds an audible beep 4 times and the display message alternates as indicated PrEP Alternating message between PrEP and Htr on A mi Ueaucuyensaceusssaucetvescennssees The inner melt heater is energized for approximately four minutes after which the Auto Program turns it OFF and sounds an audible beep eight times At this point the display indicates PrEP Inner melt heater OFF The user should remove the inner melt heater at this time Note No damage will occur to the gallium cell if the heater is not removed however a shorten 23 9230 Maintenance System User s Guide 24 6 4 ing of the melt plateau may result The inner melt heater may be stored in the melt heater well at the back of the unit After the inner melt heater has been powered OFF the instrument remains at
69. s maintained at a fairly constant value The temperature stability of the well and the response time depend on the width of the proportional band If the band is too wide the well temperature deviates excessively from the set point due to varying external conditions This devia tion is because the power output changes very little with temperature and the controller does not respond well to changing conditions or noise in the system If the proportional band is too narrow the temperature may swing back and forth because the controller overreacts to temperature variations For best con trol stability the proportional band must be set for the optimum width The proportional band width is set at the factory to about 8 0 C The propor tional band width may be altered by the user to optimize the control character istics for a particular application 31 9230 Maintenance System User s Guide 32 6 18 The proportional band width is easily adjusted from the front panel The width may be set to discrete values in degrees C or F depending on the selected units The proportional band adjustment can be accessed within the secondary menu Press the SET and EXIT buttons to enter the secondary menu and show the de vice Ms Then press the SET button twice to access the proportional band e Access Peltier device power in secondary menu SEC i Flashes SEC and then percent power flashes A Flashes prior to displaying Peltier device
70. s on freezing by 3 1 and to compensate for this the inner construction of the cell incorporates a flexible Teflon wall Although the cell is more rugged than other gallium cells care must be taken to prevent damage to the cell particularly during the refreeze process Because gallium expands on freezing like water the cell must be frozen from the bottom up or there is potential for damage to the cell The Auto Program process of the Model 9230 ensures that the cell is frozen properly The cell s entrant well dimensions are 8 7 length x 0 324 diame ter with an immersion depth of 6 58 in gallium The Model 9230 Gallium Maintenance Apparatus is specifically designed to maintain the Model 5943 Gallium Cell Once properly installed in the Model 9230 the Auto Program may be started and subsequently initiates the melt pla teau maintains the plateau for up to 5 days typical and properly refreezes the cell for the next melt When not actively melting or refreezing a cell the Model 9230 automatically maintains the cell at 25 00 C Standby well below the melting point To initiate a melt the inner melt heater is inserted into the cell and the Auto Program is started through the Model 9230 s front panel buttons The Model 9230 increases its temperature to just above the gallium point and powers the 8 watt inner melt heater Approximately 30 minutes later the gal lium cell is ready to be used see Figure 1 The Model 9230 uses
71. se These parameters directly affect the melt plateau duration time and proper freezing of the gallium cell Insert only frozen gallium cells into the 9230 DO NOT insert a melted cell into the unit and then initiate the Auto Program An improper freeze may occur resulting in damage to the cell Authorized Service Centers Please contact one of the following authorized Service Centers to coordinate service on your Hart product Fluke Corporation Hart Scientific Division 799 E Utah Valley Drive American Fork UT 84003 9775 USA Phone 1 801 763 1600 Telefax 1 801 763 1010 E mail support hartscientific com Fluke Nederland B V Customer Support Services Science Park Eindhoven 5108 5692 EC Son NETHERLANDS Phone 31 402 675300 Telefax 3 1 402 675321 E mail ServiceDesk fluke nl Fluke Int l Corporation Service Center Instrimpex Room 2301 Sciteck Tower 22 Jianguomenwai Dajie Chao Yang District Beijing 100004 PRC CHINA Phone 86 10 6 5 12 3436 1 Before You Start Authorized Service Centers Telefax 86 10 6 5 12 3437 E mail xingye han Ofluke com cn Fluke South East Asia Pte Ltd Fluke ASEAN Regional Office Service Center 60 Alexandra Terrace 03 16 The Comtech Lobby D 118502 SINGAPORE Phone 65 6799 5588 Telefax 65 6799 5588 E mail antngOsinga fluke com When contacting these Service Centers for support please have the following information available e Model Number e Serial Nu
72. ss the program advance button sequence to access the program advance function e com Access program advance The current program state will be displayed i Eofluto Return to main menu PrEP i Initiate cell melt with melt heater i nnfRint Maintain melt plateau 25 9230 Maintenance System User s Guide 26 6 7 6 8 FrEECH Initiate total melt FrEEgt j Start freezing the cell From the current program state the up or down buttons can be pressed to choose a different program state Cue or com Choose the desired program state Once the desired program state is chosen press SET to accept and start that program Accept new program state and start the program To get to the wait state the user must select the Auto state then press set to start the program in the wait state Manual Mode Starting the Manual Mode After the instrument is powered ON or at the end of a gallium cell refreeze pro cess the unit automatically is set to 25 C and the digital LED display reads Auto Ready to start Auto Program The unit is in a Standby condition and remains at 25 C indefinitely until the user initiates a change by pressing a button sequence To begin the Manual mode of operation the user presses the UP or DOWN buttons to change the display reading as follows om or we Toggle display between Auto and Manual nnfin Ready to go into Manual mode By pressing the SET button while this is displaye
73. step 1 above 29 270 C The value of R old RO should be obtained from the memory of the Model 9230 Use the following process with the front panel buttons to obtain the cur rently programmed value of RO 25 00 Instrument in manual mode well temperature displayed NESTERRRIRMARSESENSARENEARSSERRRERAS SET ev Press the SET button and then the EXIT button to enter the secondary menu SE cru HUBER AM Let Po Flashes percent power Lo OE Peltier device power in percen Press the SET button until Co nF G is displayed L Cenfib Flashes configuration menu PL OE jo Prag submenu Press the UP button until CAL is displayed LLLLCRL Calibration parameter mend SET Press the SET button 5 times to access the RO value Ca BD Flashes before entering the RO sening 9 Calibration Procedure Calibration Procedure 99 983 Current RO value ohms 4 Program the new value for RO R from step 3 above into the Model 9230 memory see Section 6 24 1 RO 5 Repeat steps 1 and 2 to verify that the newly calibrated Model 9230 is now within acceptable limits If not perform steps 3 4 and 5 again as necessary Note If it is known that the Model 9230 is more than 0 5 C out of specifica tion such that if the unit was calibrated at 29 270 C the cell would begin melt ing then the above procedure should be performed below the 29 270 C set point as applicable e g 28 5 C After adjusting the unit at the lower tempera t
74. t pe riod of 1 to 2 hours before it can be assumed to meet all of the safety requirements of the IEC1010 1 Follow all safety guidelines listed in the user s manual Calibration Equipment should only be used by Trained Personnel When the melt heater switch is in the MANUAL ON position the melt heater is continuously energized and can get hot A CAUTIONS To avoid possible damage to the instrument follow these guidelines DO NOT use fluids to clean out the well DO NOT slam the probe stems into the entrant well of the gallium cell The probe could be damaged DO use the cell removal tool to remove the cell from the well of the instrument Grasp the cell with a hand as soon as the cell is removed far enough from the well DO NOT use the removal tool to carry the cell The removal tool is not de signed for transporting the cell Never introduce foreign material into the well Fluids etc can leak into the cal ibrator causing damage DO use silicon oil or other appropriate heat transfer medium in the entrant well of the gallium cell Be sure the transfer medium does not leak out into the well of the instrument DO NOT change the value of the calibration constant from the factory set value The correct setting of this parameter is important to the safety and proper operation of the calibrator 9230 Maintenance System User s Guide 1 3 The Auto Program configuration parameters should not be adjusted under nor mal u
75. the melt heater in the storage well located at the back of the instrument when not in use DO NOT operate this unit without a properly grounded properly polarized power cord Use only grounded AC mains supply of the appropriate voltage to power the in strument Refer to Section 3 1 Specifications for power details DO NOT connect this unit to a non grounded non polarized outlet HIGH VOLTAGE is used in the operation of this equipment SEVERE IN JURY OR DEATH may result if personnel fail to observe safety precautions Before working inside the equipment turn the power off and disconnect the power cord Always replace the fuse with one of the same rating voltage and type 1 Before You Start Safety Information 1 2 2 Overhead clearance is required DO NOT place this instrument under a cabinet or other structure Additionally at least 6 inches of space between the instru ment and nearby objects is necessary for sufficient air circulation DO NOT use this unit for any application other than calibration work DO NOT use this unit in environments other than those listed in the user s guide DO NOT turn the unit upside down with the cell in place the cell will fall out of the unit DO NOT operate near flammable materials DO use a ground fault interrupt device Before initial use after transport and anytime the dry well has not been ener gized for more than 10 days the calibrator must be energized for a dry ou
76. ture is dis played by pressing the EXIT button Pressing the SET button accesses the pa rameters within the Prog 3 submenu Freeze Melt State The Freeze Melt State parameter is used to control the configuration of the Peltier devices and is only usable in the manual mode of operation During nor mal operation of the instrument this parameter should not be altered 6 Controller Operation Serial Interface Parameters 6 23 During the melt and maintain processes the Peltier devices are configured to apply a uniform heat source to the well This minimizes vertical gradients in the well and gallium cell to maximize the length of the melt plateau During a Freeze process the Peltier devices are configured to generate a large vertical gradient in the well to ensure the proper refreezing of the gallium cell The default setting for this parameter is MELT The Freeze Melt State parameter is accessed from the Prog 3 submenu Prog 3 submenu A TA a FrEEdE New freeze melt state setting If no changes are desired press the EXIT button to exit the Prog 3 submenu Press the SET button to accept the new value and return to the Prog 3 submenu SET Accept new Freeze Melt State setting The display then shows Pro amp 3 and returns to the Prog 3 submenu ProG 3 Prog 3 submenu Prog 2 may be accessed by pressing the DOWN button The serial interface menu may be accessed by pressing the UP button The well temperature is dis played
77. uid interfaces An inner liquid interface exists at the reentrant well with an outer liquid interface completely surrounding the inner interface at the con tainer wall For a detailed description of the liquid solid liquid interfaces in the realization of the gallium melt see NIST Note 1265 Verify that the inner melt heater is securely connected to the back of the instru ment Remove the inner melt heater from the storage well and carefully insert it through the holes in the top insulation plugs and into the entrant well of the gal lium cell Make sure that the heater cartridge is completely inserted to the bot tom of the cell s entrant well Auto Program The Model 9230 is designed to automate the gallium cell melt plateau This is accomplished through the use of the Auto Program a microprocessor con trolled program that determines set temperatures scan rates duration times Peltier module configurations and melt heater controls By controlling all of these parameters in the proper order a temperature profile can be maintained in the block assembly that assures a uniform melt maintains the melt over long 8 Melting Point of Gallium Realization Auto Program 8 7 1 8 7 2 8 7 3 periods of time properly refreezes the cell and keeps the cell ready for the next melt cycle The Auto Program is illustrated in Figure 1 Starting the Auto Program After the frozen gallium cell has been properly installed in the instrument and the
78. ure e g 28 5 C and verifying that the error had been reduced to less than 0 5 C then the above procedure may be safely used 63 10 Maintenance 10 Maintenance e The calibration instrument has been designed with the utmost care Ease of operation and simplicity of maintenance have been a central theme in the product development Therefore with proper care the instrument should require very little maintenance Avoid operating the instrument in an oily wet dirty or dusty environment e If the outside of the instrument becomes soiled it may be wiped clean with a damp cloth and mild detergent Do not use harsh chemicals on the surface which may damage the paint e tis important to keep the well of the instrument clean and clear of any foreign matter e The instrument should be handled with care Avoid knocking or dropping the instrument e Examine the gallium cell for deformities before inserting it in the well If there is any chance of jamming the cell in the well file or grind off the protuberance e Do not drop the probes into the well This type of action can cause dam age to the entrant well of the gallium cell e Ifahazardous material is spilled on or inside the equipment the user is responsible for taking the appropriate decontamination steps as outlined by the national safety council with respect to the material e Ifthe mains supply cord becomes damaged replace it with a cord with the appropriate gauge
79. ure to totally melt the gallium in the cell The value can be set up to 360 minutes 6 hours and can be seen on Fig ure 1 as the time duration when the display shows Fr EE ZH The instrument re mains at the Freeze Hot Temperature for this time to ensure that all of the gallium has been melted before refreezing the cell Note The default program does not use the Freeze Hot option and thus the Freeze Hot time is set to 0 seconds After accessing the Freeze Hot Temperature parameter the display flashes dur 5 and displays the current value of the Freeze Hot Time dur 5 i Flashes before entering the freeze hot time parameter 360 New freeze hot time value 360 minutes If no changes are desired press the EXIT button to continue to the next param eter Press the SET button to accept the new value and continue on to the next parameter Accept new freeze hot time value and continue to the freeze cold temperature Freeze Cold Temperature The Freeze Cold Temperature parameter is the temperature to which the instru ment scans during the refreezing of the gallium cell The default value is 0 00 C and can be seen on Figure as the temperature the unit scans to while the display shows Fr EEC After accessing the Freeze Hot Time parameter the display flashes Fr EE2C and displays the current value of the Freeze Cold Temperature 6 Controller Operation Prog 2 6 21 7 6 21 8 FrEECL Flashes before entering the freeze cold te
80. usted to compensate for the error at 29 27 C The value of this parameter is set at the factory for best instrument ac curacy This parameter may be adjusted by an experienced user to improve the accuracy of the instrument see Section 10 Calibration Procedure From the CAL submenu pressing the SET button 5 times accesses the RO parameter O OOO O A If no changes are desired press the EXIT button to return to the CAL submenu Press the SET button to accept the new value The display then shows C and returns to the CAL submenu The serial inter face menu may be accessed by pressing the DOWN button The well tempera ture is displayed by pressing the EXIT button Pressing the SET button five times accesses the RO parameter within the CAL submenu 7 Digital Communication Interface Serial Communications 7 1 7 1 1 7 1 2 Digital Communication Interface The Model 9230 is capable of communicating with and being controlled by other equipment through the digital interface With a digital interface the instrument may be connected to a computer or other equipment This allows the user to set the set point temperature monitor the temperature and access any of the other controller functions all using remote communications equipment Communications commands are summarized in Table 4 on page 52 Serial Communications The instrument is installed with an RS 232 serial interface that allows serial digital communications
81. utton after adjusting the set point value to change display units The units can also be changed quickly from the main display by pressing the SET and UP buttons 6 Controller Operation Scan 6 11 6 11 1 6 12 Scan The scan rate can be set and enabled so that when the set point is changed the instrument heats or cools at a specified rate degrees per minute until it reaches the new set point With the scan disabled the instrument heats or cools at the maximum possible rate Scan Control The scan is controlled with the scan ON OFF function that appears in the main menu after the set point and unit s functions ScAn 0FF Scan function OFF x Press the UP or DOWN button to toggle the scan ON or OFF 5cfHnz n Scan function ON Press the SET button to accept the present setting and continue SET Accept scan setting Scan Rate The next function in the main menu is the scan rate The scan rate can be set from 0 1 to 5 0 C minute 0 2 to 9 0 F min The maximum scan rate however is actually limited by the natural heating or cooling rate of the instrument This is typically less than 2 C minute The scan rate function appears in the main menu after the scan control function The scan rate units are in degrees per minute degrees C or F depending on the selected units Press the SET button to accept the new scan rate and continue SET Accept scan rate The display returns to the current well temper
82. value of this parameter is set at the factory for best instrument accuracy and is located on the Report of Calibration shipped with the instrument This parameter may be adjusted by an experienced user to improve the accuracy of the instrument A calibration should be done at regular intervals such as once a year to ensure that it is operating properly Calibration Equipment Calibration of the Model 9230 requires a standard thermometer and readout de vice that are adequately accurate The combined accuracy of the thermometer and readout should be 0 0125 C or better Recommended equipment includes a laboratory grade PRT or thermistor probe with a length of 230 to 300 mm 9 to 12 inches The calibration may be performed in a frozen Model 5943 gal lium cell or in an aluminum test block that simulates the gallium cell A small amount of silicone oil 200 05 or equivalent should be used in the entrant well for good thermal transfer from the cell to the thermometer Calibration Procedure The accuracy of the Model 9230 at the gallium melting point 29 7646 C is determined by the value of the calibration parameter RO The calibration proce dure involves measuring the error between the Model 9230 and the reference thermometer at a temperature near the gallium melting point and adjusting the calibration parameter RO as necessary to reduce the errors to within acceptable limits The stated accuracy of the Model 9230 is given in Section 3 1 Specifi
83. wire for the current of the instrument If there are any questions call Hart Scientific Customer Service for more informa tion e Before using any cleaning or decontamination method except those rec ommended by Hart users should check with Hart Scientific Customer Service to be sure that the proposed method does not damage the equip ment e Ifthe instrument is used in a manner not in accordance with the equip ment design the operation of the instrument may be impaired or safety hazards may arise e Do not drop the gallium cell into the instrument well This type of action can cause a shock to the control sensor thermoelectric modules or dam age the cell 65 11 Troubleshooting 11 11 1 Troubleshooting This section contains information on troubleshooting CE Comments and a wiring diagram Troubleshooting Problems Possible Causes and Solutions In the event that the instrument appears to function abnormally this section may help to find and solve the problem Several possible problem conditions are described along with likely causes and solutions If a problem arises please read this section carefully and attempt to understand and solve the problem If the problem cannot otherwise be solved contact Hart Scientific Customer Ser vice for assistance 1 801 763 1600 Be sure to have the model number and serial number of your instrument available Problem Possible Causes and Solutions Incorrect temperature

9230 Users Guide 811002.vp

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