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7013 Users Guide 682..

1. T Secondary Functions emperature gt SET EXIT Y Te PCP EE Y lt EXIT Display Power I H EXIT Reset Cutout SET Y Cutout Active SET E EXIT Set Proportional Band T see she _ Y SET lt TEXIT H Select Setpoint _ Y SET lt EXIT Set Cutout Temp Y SET A EXIT Adjust Setpoint I SET Y lt lt EXIT Adjust Vernier EXIT SET Y lt lt EXIT Set Scale C F Configuration Menu SET SET 1 A 1 EXIT EXIT EXIT EXIT j 1 up Serial UR IEEE 488 u T prope lt DOWN Parameters DOWN Interface DOWN Interface lt DowN Collbration Menu Menu lt lt f 4 SET SET SET SET a SET X 5 I 1 Y Y Y Y 2 Y Cutout BAUD Device 1 did Reset Mode Rate t o 1 gt t SET EXIT gt i SET EXIT Adj Cut Ad i jj Cutout just Adi Device D 2 I I 1 I SET EXIT SET EXIT SET EXIT i SET EXIT 3 SET EXIT Sampi ample ALPHA Period 488 CPE H 0 SET EXIT gt SET EXIT Option Installed E SET EXIT es cen E Adj Sample 2 SET EXIT SET EXIT lt SET EXIT LI Aa Duplex o CG BG Mode 5 SET EXIT z EXT P a
2. Upgraded drawing to T CAD format E Figure 14 7013 Wiring Diagram 75
3. STIRRING PROPELLERS MERCURY TRAP CALIBRATED TEMPERATURE CONTROL PROBE DRAIN TO BACK PANEL Figure 6 Fluid System 24 5 Description of parts and controls Back panel 2 ej 9 y 1 a 0 Figure 7 Back panel 4 The Main Power Box contains three 12 gauge wires This supplies power to both the cold and hot baths The white and black wires are the two hot legs of the 230 VAC power supply and the green wire is ground 5 This Pump Power Receptacle is for the hot bath pump Its power is turned on with the main power switch The pump requires 230 VAC 6 This Probe Connector is used to connect the hot bath control probe to the temperature controller 25 7013 Calibration Bath User s Guide 26 5 5 7 This Drain is used to empty the hot bath Be sure to allow fluids to cool to safe temperatures before draining 8 The Serial Number Label identifies the bath for reference when con tacting the factory 9 The Power Requirement Label specifies the electrical power to be con nected to the unit 10 The System Fuses for both baths are located inside the back panel The fuses are rated at 250 VAC 15 Amp slow blow If the fuses need to be replaced be sure to use fuses with equivalent ratings Pump lid assembly The pump lid assemb
4. 56 10 2 3 CPR 1 Crankcase Pressure Regulator Valve 56 10 2 4 SV 1 and SV 2 Solenoid Valves 56 10 2 5 PG 1 Pressure Gauge s e no ad dax ue 56 10 2 6 CC 1 Cascade Condensers ai dye Bay aah does e dee X dante Baw 56 10 2 7 CP 1 and CP 2 Cooling Plate Evaporators 56 10 2 8 Switching for R507 Stage 56 11 Appendix B Refrigeration charging and evacuation 57 11 1 RSOT System oom Re XR Pa bte 57 11 2 Ethylene System i o e a s 57 12 Appendix C Replacement parts list 59 13 Appendix D Digital interface 65 13 1 Serial communications 65 13 1 1 a Aer ees AKALANG Sy Na 65 13 1 2 uv doces grade HR de Xue y nes We n n de 66 Bad tatess us aue dera An LR a a dae qus bases 70 13 1 22 Sample period zuo ox xa aoe aS REOR OS dedo NG 70 13 1 2 3 Duplex mode eate UR AE nd de ae aoe IPIS aoa 70 pe DA JEanefeed en en Rode Rice Eee Pea Boe E Oe EIOS 70 13 1 3 Serial operations 2 A sa dan An Lu date WES 70 13 2 488 communication 71 13 2 1 zu cete d ee esa i ue
5. Hart Scientific 7013 Calibration Bath User s Guide Rev 682804 Rev 682804 Limited Warranty amp Limitation of Liability Each product from Fluke Corporation Hart Scientific Division Hart is warranted to be free from de fects in material and workmanship under normal use and service The warranty period is 1 year s for the Calibration Bath The warranty period begins on the date of the shipment Parts product repairs and ser vices are warranted for 90 days The warranty extends only to the original buyer or end user customer of a Hart authorized reseller and does not apply to fuses disposable batteries or to any other product which in Hart s opinion has been misused altered neglected or damaged by accident or abnormal conditions of operation or handling Hart warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non defective media Hart does not warrant that software will be error free or operate without interruption Hart does not warrant calibrations on the Calibration Bath Hart authorized resellers shall extend this warranty on new and unused products to end user customers only but have no authority to extend a greater or different warranty on behalf of Hart Warranty support is available if product is purchased through a Hart authorized sales outlet or Buyer has paid the applicable international price Hart re
6. because the controller overreacts to temperature variations For best control sta bility the proportional band must be set for the optimum width MAMAN Proportional Band too Narrow Proportional Band too Wide Optimum Proportional Band a m Un Figure 10 Proportional Band The proportional band should be wider when the higher power settings are used The proportional band may also require adjustment depending on the fluid temperature and application of the bath 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 optimum proportional band width setting may be determined by monitor ing the stability with a high resolution thermometer or with the controller per cent output power display Narrow the proportional band width to the point at which the bath temperature begins to oscillate and then increase the band width from this point by 3 or 4 times Typically the optimum proportional band is about 2 C with low heater power and 4 C with medium heater power The proportional band adjustment may be accessed within the secondary menu Press SET EXIT to enter the secondary menu and show the heater power Then press SET to access the proportional band t Access heater power in secondary menu To change the proportional band press UP or DOWN Decrement display 39 7013 Calibration Bath User s Guid
7. carriage return and linefeed Then the value is returned as indicated in the RETURNED column 69 7013 Calibration Bath User s Guide 70 13 1 2 1 13 1 2 2 13 1 2 3 13 1 2 4 13 1 3 Baud rate The baud rate is the first parameter in the menu The display will prompt with the baud rate parameter by showing B RU g Press SET to choose to set the baud rate The current baud rate value will then be displayed The baud rate of the serial communications may be programmed to 300 600 1200 or 2400 baud The baud rate is pre programmed to 1200 baud Use UP or DOWN to change the baud rate value Press SET to set the baud rate to the new value or EXIT to abort the operation and skip to the next parameter in the menu Sample period The sample period is the next parameter in the menu and prompted with 5A fi PLE The sample period is the time period in seconds between temperature measurements transmitted from the serial interface If the sample rate is set to 5 for instance then the bath will transmit the current measurement over the serial interface approximately every five seconds The automatic sampling is disabled with a sample period of 0 Press SET to choose to set the sample period Ad just the period with UP or DOWN and then use SET to set the sample rate to the displayed value Duplex mode The next parameter is the duplex mode indicated with d U P L The duplex
8. The parts list consists of REFERENCE DESIGNATOR PART NUMBER LEVEL DESCRIPTION QUANTITY and UNITS of measure 1 The REFERENCE DESIGNATOR refers to alpha numeric designators used in figures and or drawings elsewhere in this manual where applicable 2 The PART NUMBER is the Hart Scientific number 3 The LEVEL where shown indicates levels of assembly e g an assem bly listed at LEVEL 1 may have sub assemblies or components listed at LEVEL 2 Items at LEVEL 2 may have components listed at level 3 and so on 4 The DESCRIPTION QUANTITY and UNITS are also given for identi fication and ordering purposes 7013 TOP ASSEMBLY REFERENCE DESIGNATOR PART NUMBER LEVEL DESCRIPTION QTY UNITS 00110490 1 LID ASSEMBLY COMPLETE 1 EACH 00110500 2 PUMP ASSEMBLY 1 EACH 85801000 3 STIRRING PROPELLER 1 EACH 70102106 LID MOUNTING SCREWS 4 EACH 10 32 X 2 3 8 PAN HEAD 00110510 AMBIENT GUARD ASSEMBLY 2 EACH 87192624 CONTROL PROBE 14 inch 10092 2 EACH 75350710 OIL HOT BATH DOW 710 2 GAL 59 7013 Calibration Bath User s Guide 75350080 OIL COLD BATH HALOCARBON 0 8 2 GAL 7013 CHASSIS REFERENCE PART DESIGNATOR NUMBER LEVEL DESCRIPTION QTY UNITS 73101632 CASTER 16 32 XD 4 EACH 7013 COLD BATH REFERENCE PART DESIGNATOR NUMBER LEVEL DESCRIPTION QTY UNITS 00160090 COLD BATH INSULATION KIT 1 EACH 00153520 COLD BATH TANK amp FLANGE WELDMENT 1 EACH 00150080 COLD BATH HEATER KIT 2 EACH 00153550 COOLING PLATE ASSE
9. 7013 Calibration Bath User s Guide pacity and lifetime It is also important that the system have plenty of air space around it for sufficient air flow 54 10 Appendix A Ethylene System 10 10 1 10 1 1 10 1 2 10 1 3 10 1 4 10 1 5 Appendix A Refrigeration system and component description The purpose of this section is to explain some of the more unique components and operations of the Hart 7013 refrigeration system It does not attempt to de scribe the more generally known and understood components Refer to the cold bath refrigeration diagram Ethylene System DES 1 De super Heater Coil This coil is used to cool the ethylene refrigerant to room temperature prior to condensing it in the cascade condensing coil This increases the efficiency of the system Its fan also helps cool the ethylene compressor TS 1 Thermal Switch When the Cascade condensing coil outlet is cooled by the R404a system to ap proximately 25 C this switch closes and turns on the low stage or ethylene system This is to insure that cooling is sufficient before the ethylene compres sor is turned on Should the R404a compressor stop for some reason this cut out will turn the ethylene compressor off before damage occurs ET 1 Expansion Tank The expansion tank is used to allow an increased amount of refrigerant to be in the system while still having a low static pressure of 150 psi This gives added cooling power without th
10. and cutout set point The temperature scale units selection is accessed after the vernier adjustment function by pressing SET From the temperature display function access the units selection by pressing SET 4 times 25 00 Bath temperature peel Press SET to accept the new selection and resume displaying the bath temperature SET Set the new units and resume temperature display Secondary menu Functions which are used less often are accessed within the secondary menu The secondary menu is accessed by pressing SET and EXIT simultaneously and then releasing The first function in the secondary menu is the heater power display See Figure 37 7013 Calibration Bath User s Guide 38 7 6 7 7 Heater power The temperature controller controls the temperature of the bath by pulsing the heater on and off The total power being applied to the heater is determined by the duty cycle or the ratio of heater on time to the pulse cycle time This value may be estimated by watching the red green control indicator light or read di rectly from the digital display By knowing the amount of heating the user can tell if the bath is heating up to the set point cooling down or controlling at a constant temperature Monitoring the percent heater power will let the user know how stable the bath temperature is With good control stability the per cent heating power should not fluctuate more than 1 within one mi
11. mode may be set to half duplex HALF or full duplex FULL With full duplex any commands received by the bath via the serial interface will be im mediately echoed or transmitted back to the controlling device With half du plex the commands will be executed but not echoed The default setting is full duplex The mode may be changed using UP or DOWN and pressing SET Linefeed The final parameter in the serial interface menu is the linefeed mode This pa rameter enables 0 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 UP or DOWN and pressing SET Serial operation Once the cable has been attached and the interface set up properly the control ler will immediately begin transmitting temperature readings at the pro grammed rate The set point and other commands may be sent to the bath via the serial interface to set the bath and view or program the various parameters The interface commands are discussed in Section 13 3 and listed in Table 2 13 Appendix D Digital interface IEEE 488 communication 13 2 13 2 1 13 2 1 1 13 2 1 2 13 2 2 13 3 IEEE 488 communication The IEEE 488 interface is available as an option Baths supplied with this op tion may be connected to a GPIB type communication bus which allows many instru
12. 2 indicator lights when the low stage or two stage compres sor is powered up It normally takes several minutes of high stage opera tion before it will start 12 The Pressure Gauge is located in the center panel of the unit and indi cates the evaporator pressure of the single stage refrigeration It is useful in showing that the system is operating properly in single stage mode It is not useful in two stage mode 13 The Evaporator Temperature Valve is used to adjust the cooling tem perature of the single stage system Adjustment is factory set and further adjustment is not normally required However it may occasionally need to be readjusted to 0 psi by loosening the lock nut and resetting it Fluid system The fluid system of the 7013 consists of two parts one for the cold bath and one for the hot bath The cold system contains approximately 1 6 gallons of Halocarbon 0 8 heat transfer fluid while the hot system contains approximately 1 4 gallons of Dow 710 heat transfer fluid Each fluid will function over the en tire range of its respective bath 100 to 70 C for the cold bath and 60 C to 300 C for the hot bath Other fluids may be used with varying results How 5 Description of parts and controls Back panel 5 4 ever when using other fluids care must be taken that it is both safe at its in tended temperature and that its viscosity is low less than 50 centistokes throughout the temperature range Each temperatu
13. 75310502 R502 REFRIGERANT As Required CD 1 CD 2 00153550 COOLING PLATE EVAPORATOR 2 EACH EC 1 30015345 EVAPORATOR COIL 1 EACH 7013 REAR POWER PANEL 62 12 Appendix C Replacement parts list REFERENCE DESIGNATOR PART NUMBER 23760108 23712004 81106000 81107216 81107236 LEVEL DESCRIPTION 8043 2 40 60 SOCKET PUMP POWER PROBE SOCKET TB4M SWITCHCRAFT B 600 71 4 DRAIN BULKHEAD CONN E1 6B DRAIN ELBOW 3 8FLR 1 4MPT DRAIN CAP NFTS 6 3 8 CAP QTY UNITS EACH EACH EACH EACH EACH 63 13 Appendix D Digital interface Serial communications 13 13 1 13 1 1 Appendix D Digital interface If supplied with the option the 7013 bath is capable of communicating with and being controlled by other equipment through the digital interface Two types of digital interface are available the RS 232 serial interface and the IEEE 488 GPIB interface With a digital interface the bath may be connected to a computer or other equipment This allows the user to set the bath temperature monitor the tem perature and access any of the other controller functions all using remote com munications equipment In addition the heater power setting and cooling capacity may be controlled using the interface The two baths of the 7013 are connected set up and controlled independently With a few noted exceptions the following instructions apply to either bath To allow the functions to be switched usin
14. Figure 9 Controller Operation Flowchart 34 Adj Duplex Mode SET EXIT Y Linefeed lt SET Adjust Linefeed SET EXIT EXIT gt Adjust CG BG o m 4 I SET EXIT 7 Controller operation Temperature set point 7 3 7 3 1 The display will indicate the reset function rESEE Cutout reset function CPP EP Ka QE b RAN NAK Press SET once more to reset the cutout SET Reset cutout This will also switch the display to the set temperature function To return to displaying the temperature press the EXIT button If the cutout is still in the over temperature fault condition the display will continue to flash cutout The bath temperature must drop a few degrees below the cutout set point be fore the cutout can be reset Temperature set point The bath temperature can be set to any value within the range and with resolu tion as given in the specifications The temperature range of the particular fluid used in the bath must be known by the operator and the bath should only be op erated well below the upper temperature limit of the liquid In addition the cut out temperature should also be set below the upper limit of the fluid Setting the bath temperature involves three steps 1 select the set point mem ory 2 adjust the set point value and 3 adjust the vernier if desired
15. It can be damaged by improper treatment such as dropping jolting or jarring Lift the bath by hand carefully from its pallet Support it from the bottom edge Because the unit weighs 450 Ibs several people will be needed to lift it Do not use a fork lift Once it is set on a level surface it can easily be rolled into posi tion on its casters Verify that all components are present e 7013 bath e Two ambient guards e Two control probes e Two aluminum support posts e Users Guide Bath environment The Model 7013 calibration bath is a precision instrument which must be lo cated in an appropriate environment The location must be free of drafts ex treme temperatures and temperature changes dirt etc The floor must be level The area must have low vibration levels and low electrical noise levels Do not block air movement into and out of the refrigeration unit at the lower front and rear of the bath as overheating and eventual compressor damage will occur Allow approximately a foot of free air space for each side of the unit The cooling blower vent on the left side of the hot bath see Figure 5 must also be left clear When the blower is operating hot air will be exhausted from this vent into the room 80 maximum Bath preparation and filling Hart Scientific recommends the following bath fluids Hot Bath Dow 710 Cold Bath Halocarbon 0 8 The Model 7013 is shipped dry The heat transfer fluids must be put
16. Programmable set points The controller stores 8 set point temperatures in memory The set points can be quickly recalled to conveniently set the bath to a previously programmed temperature To set the bath temperature one must first select the set point memory This function is accessed from the temperature display function by pressing SET 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 25 00 L Bath temperature in degrees Celsius aaa YOO New set point memory 4 40 0 u ka aar aia a a aa a aa ka ala Terre Na Press SET to accept the new selection and access the set point value 35 7013 Calibration Bath User s Guide 36 7 3 2 7 3 3 SET Accept selected set point memory Set point value The set point value may be adjusted after selecting the set point memory and pressing SET The set point value is displayed with the units C or F at the left 40 08 Set point 4 value in C If the set point value need not be changed then press EXIT to resume dis playing the bath temperature To adjust the set point instead press UP or DOWN New set point value When the desired set point value is reached press SET to accept the new value and access the set point vernier If EXIT is pressed instead then any changes made to the set point will be ignored SET Accept new set
17. accessed within the secondary menu Press SET and EXIT to enter the secondary menu and show the heater power Then press SET twice to access the cutout set point se Access heater power in secondary menu CO 110 Cutout set point To change the cutout set point press UP or DOWN Decrement display 7 Controller operation Controller configuration 7 9 7 10 7 10 1 7 10 2 COs TSL New cutout set point To accept the new cutout set point press SET SET Accept cutout set point The next function is the configuration menu Press EXIT to resume displaying the bath temperature Controller configuration The controller has a number of configuration and operating options and calibra tion parameters which are programmable via the front panel These are ac cessed from the secondary menu after the cutout set point function by pressing SET There are 4 sets of configuration parameters probe parameters oper ating parameters serial interface parameters and controller calibration parame ters The serial interface parameters are only used with baths that are equipped with a serial interface The menus are selected using the UP and DOWN keys and then pressing SET Probe parameters menu The probe parameter menu is indicated by PrObE Probe parameters menu Press SET to enter the menu The probe parameters menu contains the pa rameters RO and ALPHA which characterize the resi
18. condensing coil CPR 1 Crankcase Pressure Regulator Valve The CPR valve is used to limit the start up suction pressure of the system It is set at 10 to 12 psi with a maximum current reading on the compressor of 5 8 amps SV 1 and SV 2 Solenoid Valves SV 1 is normally open and is used to close off the cascade condenser SV 2 is normally closed and is used to close off the cooling coils mounted on the sides of the cold tank Both coils are powered in the single stage mode PG 1 Pressure Gauge This gauge is used to monitor the evaporative pressure of the AEV valve used to cool the side mounted coils of the single stage mode As mentioned before this pressure should read 0 psi This gauge is not useful in two stage mode CC 1 Cascade Condenser This is used as the second stage ethylene condenser of the two stage Cascade system CP 1 and CP 2 Cooling Plate Evaporators The R507 evaporator coils are mounted to the outside of the cold tank When the system is in single stage mode R507 refrigerant is pumped through these coils A liquid distributor DIST 1 is used to insure that cooling to each side of the tank is equal Switching for R507 Stage The R507 cooling circuit consists of two halves the first going through the cas cade condenser and the second through evaporator coils CP 1 and CP 2 mounted to the sides of the tank Switching between the two is accomplished by use of the solenoid valves SV 1 and SV 2 mentioned abov
19. controller will transmit the current measurement over the serial interface approximately every five seconds The automatic sampling is disabled with a sample period of 0 The sample period is indicated by SAMPLE Serial sample period parameter Press SET to choose to set the sample period The current sample period value will be displayed SAz Current sample period seconds Adjust the value with UP or DOWN and then use SET to set the sample rate to the displayed value 5R 60 New sample period NOO THA 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 controller via the serial interface will be immediately echoed or transmitted back to the device of origin With half duplex the commands will be executed but not ech oed The duplex mode parameter is indicated by dUPL Serial duplex mode parameter ped 43 7013 Calibration Bath User s Guide 44 7 12 4 7 13 7 13 1 Press SET to access the mode 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 The linefeed parameter is indicated by pd Neku nun nA R ki OIL EEE HERWA AR IEEE 488 parameters menu Controllers may optionally be
20. fitted with an IEEE 488 GPIB interface In this case the user may set the interface address within the IEEE 488 parameter menu This menu does not appear on instruments not fitted with the interface The menu is indicated by IEEE IEEE 488 parameters menu Press SET to enter the menu IEEE 488 address The IEEE 488 interface must be configured to use the same address as the ex ternal communicating device The address is indicated by DATE IT EP LT prend 7 Controller operation Calibration parameters 7 14 7 14 1 7 14 2 7 14 3 Adjust the value with UP or DOWN and then use SET to set the address to the displayed value Add 15 New 488 interface address Calibration parameters The operator of the bath controller has access to a number of the bath calibra tion constants namely BO BG and L for the cold bath and CO CG H and L for the hot bath These values are set at the factory and must not be altered The correct values are important to the accuracy and proper and safe operation of the bath Access to these parameters is available to the user only so that in the event that the controller s memory fails the user may restore these values to the factory settings The user should have a list of these constants and their settings with the manual CAUTION DO NOT change the values of the bath calibration constants from the factory set values The correct settin
21. functions All commands are ASCII charac ter strings and are terminated with a carriage return CR ASCII 13 or linefeed LF ASCII 10 Interface commands are listed below Interface commands The various commands for accessing the bath controller functions via the digi tal interfaces are listed in this section see Table 2 on page 67 These com mands are used with either the RS 232 serial interface or the IEEE 488 GPIB interface The commands must be terminated with a carriage return or linefeed character The interface makes no distinction between upper and lower case let ters hence either may be used Commands may be abbreviated to the minimum number of letters which uniquely determines a command A command may be 71 7013 Calibration Bath User s Guide 72 13 4 13 4 1 used to either set a parameter or display a parameter depending on whether or not a value is sent with the command following an character For example s lt CR gt will return the current set point and s 50 00 lt CR gt will set the set point to 50 00 degrees In the list of commands in Table 2 on page 67 characters or data within brack ets and are optional for the command A slash denotes alternate characters or data Numeric data denoted by may be entered in decimal or exponential notation Bold type characters are literal characters while normal type symbolizes data Characters are shown in lowe
22. is advised in case fluid is present in the electrical system and could cause an electrical shock Always replace the power cord with an approved cord of the correct rating and type If you have questions contact an Authorized Service Center see Section 1 4 High voltage is used in the operation of this equipment Severe injury or death may result if personnel fail to observe the safety precautions Before working inside the equipment turn off the power and disconnect the power cord BATH FLUIDS Fluids used in this bath may produce noxious or toxic fumes under certain cir cumstances Consult the fluid manufacturer s MSDS Material Safety Data Sheet Proper ventilation and safety precautions must be observed Utilization of a vent hood or other ventilation system is required for silicone oil at high temperatures The instrument is equipped with a soft cutout user settable firmware and a hard cutout set at the factory Check the flash point boiling point or other fluid characteristic applicable to the circumstances of the bath operation En sure that the soft cutout is adjusted to the fluid characteristics of the applica tion As a guideline the soft cutout should be set 10 C to 15 C below the flash point of the bath fluid See Section 9 4 Heat transfer fluids for specific infor mation on bath fluids and Section 7 8 Cutout CAUTIONS To avoid possible damage to the instrument follow these guidelines GENERAL Alwa
23. parameters are only used with baths that are equipped with a serial interface The serial RS 232 interface parameters menu is indicated by SErIRL i Serial RS 232 interface parameters menu The serial interface parameters menu contains parameters which determine the operation of the serial interface These controls only apply to controllers fitted with the serial interface The parameters in the menu are baud rate sample period duplex mode and linefeed Baud rate The baud rate is the first parameter in the menu The baud rate setting deter mines the serial communications transmission rate The baud rate parameter is indicated by 7 Controller operation Serial interface parameters 7 12 2 7 12 3 BRUd Serial baud rate parameter Press SET to choose to set the baud rate The current baud rate value will then be displayed i200 b Current baud rate The baud rate of the serial communications may be programmed to 300 600 1200 or 2400 baud Use UP or DOWN to change the baud rate value e400 b New baud rate Press SET to set the baud rate to the new value or EXIT 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 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 for in stance then the
24. point value Set point vernier The set point value can only be set with a resolution of 0 01 C The user may want to adjust the set point slightly to achieve a more precise bath temperature The set point vernier allows one to adjust the temperature below or above the set point by a small amount with very high resolution Each of the 8 stored set points has an associated vernier setting The vernier is accessed from the set point by pressing SET The vernier setting is displayed as a 6 digit num ber with five digits after the decimal point This is a temperature offset in de grees of the selected units C or F 0 00000 Tek kikan nnn E EN Current vernier value in C To adjust the vernier press UP or DOWN Unlike most functions the ver nier setting has immediate effect as the vernier is adjusted SET need not be pressed This allows one to continually adjust the bath temperature with the vernier as it is displayed 0 00090 PAA aiia kaka aa aa PAPA New vernier setting Next press EXIT to return to the temperature display or SET to access the temperature scale units selection SET Access scale units 7 Controller operation Temperature scale units 7 4 7 5 Temperature scale units The temperature scale units of the controller may be set by the user to degrees Celsius C or Fahrenheit F The units will be used in displaying the bath temperature set point vernier proportional band
25. serial duplex mode du plex zf 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 Iffeed on Set serial linefeed mode to off If eed of f Ifzof Calibration Menu Read CO calibration parameter 0 c0 c0 9 c0 0 Set CO calibration parameter to n c0 n c0 0 999 9 to 999 9 Read CG calibration parameter cg cg cg 999 99 cg 406 25 Set CG calibration parameter to n cg n 9 406 25 999 9 to 999 9 Read BO calibration parameter b0 0 b0 9 b0 0 Set BO calibration parameter to n b0 n b0 0 999 9 to 999 9 Read BG calibration parameter bg bg bg 999 99 bg 156 25 Set BG calibration parameter to n bg n bg 156 25 999 9 to 999 9 Read low set point limit value tllow tl tl 999 tl 80 Set low set point limit to n tllow n tl 80 999 9 to 999 9 Read high set point limit value th igh th th 999 th 205 Set high set point limit to n th igh n th 205 999 9 to 999 9 Miscellaneous not on menus Read firmware version number ver sion ver ver 9999 9 99 ver 2100 3 56 Read structure of all commands h elp h list of commands Hot Bath Controls Read Medium Heaters f fi f1 9 1 1 Set Medium Heaters f1 1 0 1 or 0 Set medium heater to on fl n fi 1 Set medium heater to off fl n f1 0 Read Blower Fan f4 f4 f4 9 f4 0 Set Blower Fan f4 1 0 toro
26. strument being used WARNINGS To avoid personal injury follow these guidelines 1 Before You Start Safety Information GENERAL DO NOT use the instrument for any application other than calibration work The instrument was designed for temperature calibration Any other use of the instrument may cause unknown hazards to the user DO NOT use the instrument in environments other than those listed in the user s guide DO NOT overfill the bath Overflowing extremely cold or hot fluid may be harmful to the operator See Section 3 3 Bath Preparation and Filling for spe cific instructions Calibration Equipment should only be used by Trained Personnel If this equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired Before initial use or after transport or after storage in humid or semi humid environments or anytime the instrument has not been energized for more than 10 days the instrument needs to be energized for a dry out period of 2 hours before it can be assumed to meet all of the safety requirements of the IEC 1010 1 If the product is wet or has been in a wet environment take necessary measures to remove moisture prior to applying power such as storage in a low humidity temperature chamber operating at 50 C for 4 hours or more Overhead clearance is required Do not place the instrument under a cabinet or other structure Always leave enough clea
27. temperature cutout should be correctly set to help protect against ex cessive temperature see Section7 8 7 Controller operation Bath temperature 7 1 7 2 Controller operation This chapter discusses in detail how to operate the hot bath or cold bath tem perature controller using the front control panel The user may monitor the bath temperature set the temperature set point in degrees C or F monitor the heater output power adjust the controller proportional band set the cutout set point and program the probe calibration parameters operating parameters and con troller calibration parameters Functions are separated into groups called menus The primary menu contains the most often used functions These are the temperature display cutout reset set point memory set point vernier and units selection The primary menu is outlined in Figure Bath temperature The digital LED display on the front panel allows direct viewing of the actual bath temperature This temperature value is what is normally shown on the dis play The units C or F of the temperature value are displayed at the right For example 265 00 f Bath temperature in degrees Celsius The temperature display function may be accessed from any other function by pressing the EXIT button Reset cutout If the over temperature cutout has been triggered then the temperature display will alternately flash c ut out Indicates cut out con
28. temperature me dium for calibration of other temperature devices The bath fluid 8 or oil is the medium to be temperature controlled It is contained in the tank 1 The fluid is stirred and circulated by the pump 2 This stirring keeps the fluid ther mally homogeneous The fluid is pumped from the tank into the test well 3 and flows out near the top through a series of overflow holes The test well maintains a constant depth of fluid which is unaffected by thermal expansion or contraction of the fluid The bath fluid must be one whose properties of thermal transport viscosity boiling and freezing points flash point etc are consistent with the desired temperature range of the bath The 7013 uses a different fluid in each tank which accomplishes the requirements of its overall range The test well 3 is the cylindrical container in which thermal devices are in serted for calibration It has a mercury trap in the bottom for catching mer cury spills An important part of the test well is the ambient guard This is the Teflon disk attached to the top of the test well It prevents excessive heat loss from the sur face of the fluid Holes may be made in the ambient guard to accommodate the needs of individual users It is important to keep the hole sizes as small as pos sible so heat loss is reduced This technique also reduces fluid loss at higher temperatures Plug unused holes at temperatures where the oil is fuming The temperat
29. 1 3 1 Unpacking eed l i Gea uk ee en AA 11 32 Bath environment ss 444 4 e W aly yy W Q 11 3 3 Bath preparation and filling 11 3 4 Power requirements 13 4 Bath system overview 15 5 Description of parts and controls 19 5 1 Temperature control panel 19 5 2 Control panels de RR RE RU p d 20 5 2 1 Hot b th controls ue lt sg foe Ar AA 21 5 2 2 Cold bath controls a edo Re teo DAN 21 5 3 Fluid Systems 5 sus b vos de bate se sheet 22 54 Back panel i nuum ate Uh e 23 5 5 Pump lid assembly 2 26 6 General operation 29 6 1 Powet p eR xx Qi al ARE EAS 29 6 2 Setting the temperature 29 6 3 Control indicator 30 6 4 Hot bath controls 31 6 5 Cold bath controls s es so om REOR ORE n 31 6 6 Controller Adjustments 32 7 Controller operation 33 7 1 722 7 3 7 4 7 5 7 6 7 7 7 8 7 9 7 10 7 11 7 12 7 13 7 14 Bath temperature sx i is a al ko a a OR GREG aka s 33 Reset cutout 2 4 4 Lana y s amp y LEA 0 33 Temperature set point sp aa dor re e DEA 35 7 3 1 Programmable set point
30. 38500 respectively and the data for t ty err and were as given above then the new values Ry and ALPHA would be computed as 100 193 and 0 0038272 re spectively Program the new values Ro and ALPHA into the controller Check the calibration by setting the temperature to tj and ty and measuring the errors again If desired the calibration procedure may be repeated again to further im prove the accuracy 8 Bath calibration Calibration example 8 4 Calibration example 100 000 0 0038500 tg 80 00 measured t 79 843 C ty 120 00 C measured t 119 914 C Compute errors 79 843 80 00 C 0 157 C erry 119 914 120 00 C 0 086 C Compute Ry x 80 0 0157 x120 0 0 00385 1 100115 120 0 80 0 Compute ALPHA 1 0 00385x120 0 0 157 1 0 00385 x 80 0 0 086 i ALPHA 0 00385 0 0038387 120 0 80 0 Figure 11 Calibration Example The bath is to be used between 75 and 125 C and it is desired to calibrate the bath as accurately as possible for operation within this range The current val ues for Ro and ALPHA are 100 000 and 0 0038500 respectively The calibra tion points are chosen to be 80 00 and 120 00 C The measured bath temperatures are 79 843 and 119 914 C respectively Refer to Figure 11 for ap plying equations to the example data and computing the new probe constants 49 9 Repair an
31. 5 alal baha 45 7 14 3 Hangi y s p p 5 45 8 Bath calibration 47 8 1 8 2 8 3 8 4 9 Repair 9 1 9 2 9 3 9 4 9 5 Calibration points 47 Measuring the set point error 47 Computing Rand ALPHA 47 Calibration example 49 and maintenance 51 General cleaning 51 Fluid tank 25km e 92 W des da o Q lad 51 Mercury spill 2 Ana xn ee RE 51 Heat transfer fluids 52 Temperature controller 32 Probe uoo LA KG Rus RUN ES RR eee 53 9 7 Refngeration 54 kk NG KA 2 0 Sup 53 10 Appendix A Refrigeration system and componentdescription 55 101 Ethylene System 5 2 KG Rok mo EORR 55 10 1 1 DES I De super Heater Coil 55 10 1 2 TS 1 Thermal Switch 225 bonum Kaka er d 55 10 1 3 Expansion Tank e s 54 Rd b RUE EA Xn 55 10 1 4 PGz2 Pressure Gauges y u p aa Ire pass OH RR X ads 55 10 1 5 ECSIRvaporatoE Coll 24 ok pa s b d od b Wak bas 35 10 2 R507 SYSTEM x NI NG BAG pk esas GS Gee G 56 10 2 1 AEV 1 Automatic Expansion Valve 56 10 2 2 TEV 1 Thermostatic Expansion Valve
32. 68 13 Appendix D Digital interface Serial communications Table 4 Interface Command Summary continued Command Command Returned Acceptable Command Description Format Example Returned Example Values Set Blower Fan to on f4 n f4 1 Set Blower Fan to off f4 n f4 0 Read High Heaters f2 f2 f2 9 f2 1 Set High Heaters f2 1 0 1 or 0 Set High Heater to on f2 n f2 1 Set High Heater to off f2 n f2 0 Read Boost Heaters 3 f3 f3 9 13 1 Set Boost Heaters f3 1 0 1 or 0 Set Boost Heater to on f3 n f3 1 Set Boost Heater to off f3 n 18 0 Cold Bath Controls Read Medium Heaters fi fi f1 9 1 1 Set Medium Heaters f1 1 0 1 or 0 Set Medium Heater to on fl n 1 Set Medium Heater to off fl n f1 0 Read Stage 1 Cooling 3 f3 f3 9 f3 0 Set Stage 1 Cooling f3 1 0 1 or 0 Set Stage 1 Cooling to on f3 n f3 1 Set Stage 1 Cooling to off f3 n f3 0 Read High Heaters f2 f2 f2 9 f2 1 Set High Heaters f2 1 0 1 or 0 Set High Heater to on f2 n f2 1 Set High Heater to off f2 n f2 0 Read Stage 2 Cooling f4 f4 f4 9 f4 1 Set Stage 2 Cooling f4 1 0 1 or 0 Set Stage 2 Cooling to on f4 n f4 1 Set Stage 2 Cooling to off f4 n f4 0 Legend Optional Command data Returns either information n Numeric data supplied 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
33. 8 may be removed for easy access to the test well However in order to maintain high precision control it is important that it be put back in place before operating the bath Failure to do so may re sult in decreased temperature stability The ambient guard is supplied blank without holes Holes may be drilled by the user as needed These holes should be as small as possible or plugged to reduce temperature instability and fluid losses Back panel The following features are located on the back panel of the Model 7013 see Figure 7 Items 1 3 relate to the cold bath while items 5 7 relate to the hot bath 1 The Drain provides an easy way to drain the cold bath tank when either changing fluids or cleaning To drain the tank remove the drain cap by turning it counterclockwise When draining is finished be sure to replace the drain cap fitting it snugly to insure that the seal is leak proof 2 The Probe Connector is used to connect the cold bath control probe to the temperature controller 3 The Pump Power Receptacle is for the cold bath pump Its power is turned on with the main power switch The pump requires 230 VAC 23 7013 Calibration Bath User s Guide INGEGRATED HEATING AND COOLING ELEMENTS ARE ATTACHED TO THE OUTSIDE OF THE TWO LARGE SIDES p di PUMR STIRRER COLD TANK COOLING COIL INSIDE TAND FOR TWO STAGE SYSTEM AMBIENT GUARD FLUID OVERFLOW HEAT EXCHANGE FLUID PUMP HEAD TEST WELL
34. DENTAL OR CONSE QUENTIAL DAMAGES OR LOSSES INCLUDING LOSS OF DATA WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT TORT RELIANCE OR ANY OTHER THEORY Since some countries or states do not allow limitation of the term of an implied warranty or exclusion or limitation of incidental or consequential damages the limitations and exclusions of this warranty may not apply to every buyer If any provision of this Warranty is held invalid or unenforceable by a court of com petent jurisdiction such holding will not affect the validity or enforceability of any other provision 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 www hartscientific com Subject to change without notice Copyright 2005 e Printed in USA Table of Contents 1 Before You 1 1 1 Int OdlictiOn lt 3394 S LE sa 1 1 2 Symbols Used RR Ege RR anges 1 1 3 Safety Information 2 1 3 1 WARNINGS unos x Rad dv enan 8 2 1 3 2 CAUTIONS 4 s z s s WG OX XC de X 4 c X X 4 1 4 Authorized Service Centers 6 2 Spechications lt 4 06606 cei awn l se ht 3 Installation
35. MBLY 2 EACH 00153540 THERMOCOUPLE ASSEMBLY 1 EACH 00153450 COOLING COIL 1 EACH 70610381 LID STANDOFF 10 32ML TO FM 3 8HEX 4 EACH 00160040 LID GASKET KIT 1 EACH 28021000 FUSE 10A 125V 2 EACH 21022010 FUSE 20A 250V SB 2 EACH 7013 HOT BATH REFERENCE PART DESIGNATOR NUMBER LEVEL DESCRIPTION QTY UNITS 00160050 HOT BATH INSULATION KIT 1 EACH 00153530 HOT BATH TANK amp FLANGE WELDMENT 1 EACH 00153540 THERMOCOUPLE ASSEMBLY 1 EACH 00160060 HOT BATH CONTROL HEATER KIT 2 EACH 00160070 BOOST HEATER KIT 2 EACH 00160040 LID GASKET KIT 1 EACH 00110420 BLOWER EXHAUST ASSEMBLY 1 EACH 00110430 EXHAUST VALVE HANDLE ASSEMBLY 1 EACH 60 12 Appendix C Replacement parts list 28021000 FUSE 10A 125V 2 EACH 28021510 FUSE 15A 250V SB 2 EACH 7013 POWER CONTROL PANEL REFERENCE PART DESIGNATOR NUMBER LEVEL DESCRIPTION QTY UNITS 25231703 BOOSTER HEATER amp BLOWER SWITCH 2 EACH 30004000 BLOWER amp REFRIG BLUE LIGHT 3 EACH 30002010 BOOSTER HEATER RED NEON LIGHT 1 EACH 53525339 VOLTAGE REDUCTION RESISTOR 39K 1 4W 3 EACH 25231703 HEATER POWER SWITCH 2 EACH 25105100 HOT BATH POWER SWITCH 1 EACH 25231703 REFRIGERATION MODE SWITCH 1 EACH 25105100 COLD BATH POWER SWITCH 1 EACH 25231055 CUTOUT RELAY 2 EACH 7013 COOLING BLOWER ASSEMBLY REFERENCE PART DESGNATOR NUMBER LEVEL DESCRIPTION QTY UNITS 00110400 1 COOLING BLOWER ASSEMBLY COMPLETE 1 EACH 85101880 2 D 188 230V 1500 RPM MOTOR 1 EACH 85105110 2 BLOWER FAN AL SQRL CAGE 1 EACH 7013
36. PUMP POWER These receptacles are switched on with the unit s main power switch Power requirements The 7013 operates on power as listed in Section 2 Specifications WARNING An inadequate voltage supply can damage the compressors Electrical power is attached to the 7013 in the power box in the back of the unit near the center Remove the 2 5 x 4 5 inch metal cover to locate three wires The black wire is the hot line the white wire the second hot line and green is ground Attach these to the power source using wire nuts Prevent strain on the power cable connections by using the clamp in the box cover The power line must be capable of supplying 24 amps use at least 12 gauge wire Once the installation is complete the unit may be operated according to the procedures given in the following sections 13 4 Bath system overview Bath system overview The Hart Scientific 7013 is shown in block form in Figure 2 The bath system consists of two baths Each bath consists of a 1 tank 2 pump 3 test well 4 temperature controller 5 control heater 6 cooling system 7 overtemperature cutout 8 bath fluid and 9 temperature control probe The hot bath has an additional heater referred to as the boost heater which speeds temperature rise It also features a cooling blower which blows room temperature air around the tank to rapidly reduce its temperature The function of the bath is to provide an accurate and stable
37. REFRIGERATION REFERENCE PART DESIGNATOR NUMBER LEVEL DESCRIPTION QTY UNITS C2 00116011 1 2 SERViCE VALVE KIT 2 EACH 00116012 3 8 SERVICE VALVE KIT 2 EACH CPR 2 82106000 CRO 6 0 60 5 8 ODF CPR 1 EACH 05 1 82405581 5581 AC amp R OIL SEPARATOR 1 EACH FAN 2 85105421 5421 9W 230V CW FAN MOTOR 1 EACH 85105012 GEMLINE FB106 FAN BLADE 1 EACH 61 7013 Calibration Bath User s Guide DES 1 83000100 50639 DE SUPER HEAT COIL 1 EACH TS 1 87521000 016 104 RAMCO THERMAL SWITCH 1 EACH FD 2 82300114 D 114 GEMLINE FILTER DRYER 1 EACH PG 2 82200500 HIGH PRESS GAUGE MARSH J4320 1 EACH 75351150 OIL ZEROL 150 SUS REF 1 EACH CT 82910001 BC 1 CAPILLARY TUBE 100 LONG 1 EACH 75311000 ETHYLENE GAS As Required 75312000 PROPANE GAS As Required C41 83006200 COMPRESSOR KAJ3 0075 CAV 1 EACH 83006220 STARTING RELAY ASSEMBLY 2 EACH ACC 1 83000200 1075 00 COND COIL 1 EACH LR 1 83000300 51067 1 LIQUID RECEIVER 1 EACH FAN 1 85105821 5821 16W 230V CW 1550RPM 1 EACH 85105014 FB 109 FAN BLADE 1 EACH AEV 1 82100740 104 740 SINGER EXP VALVE 1 EACH 00150460 B001 5046 VALVE CLAMP 1 EACH TEV 1 82101502 SPORLAN 502 TX VALVE 1 EACH CPR 1 82106000 CRO 6 0 60 5 8 ODF CPR 2 EACH CC 1 83004150 CASCADE CONDENSER COAX 150H 1 EACH LMI 1 82300118 SG118R SIGHT GLASS 1 EACH FD 1 82300114 D 114 GEMLINE FILTER DRYER 1 EACH PG 1 82200250 M2 250 LOW PRESS GAUGE MARSH J4320 1 EACH SV 1 SV 2 82112000 0E9S240 SPORLAN SOL VALVE 2 EACH 82112010 OMKC 2 230VAC SOLENOID COIL 2 EACH
38. d maintenance General cleaning 9 1 9 2 9 3 Repair and maintenance General cleaning The external parts of the bath should be cleaned regularly to remove oil Spill age and drippings should be cleaned up immediately in order to prevent con tamination of the work area It is recommended that probes being tested are wiped clean with an absorbent material when they are withdrawn from the test well Stainless steel parts may be cleaned with an appropriate solvent cleaner such as MEK Painted surfaces however SHOULD NOT be cleaned with a solvent In stead a good oil removing soap or non abrasive detergent may be used Fluid tank The fluid tank is accessed by removing the pump lid assembly To do this first disconnect the power pump cable and remove the probe Next unscrew the four screws located in the corners on top of the lid Lift the lid by the edge allowing any fluid that may be in the test well to drain back into the tank before setting the lid aside The entire pump lid assembly will come out as a single unit The assembly and the tank are then accessible for inspection repair cleaning or decontamination To reinstall the lid follow the reverse procedure Be sure the probe is replaced or temperature control will be impossible To drain the bath fluid first make sure the power is off Place a container large enough to hold the entire volume of fluid beneath the drain The drain for the hot and cold systems are behi
39. d must be able to measure the bath fluid temper ature with higher accuracy than the desired accuracy of the bath By using a good thermometer and carefully following procedure the bath can be calibrated to an accuracy of better than 0 02 C over a range of 100 C Calibration points In calibrating the bath Ry and ALPHA are adjusted to minimize the set point error at each of two different bath temperatures Any two reasonably separated bath temperatures may be used for the calibration however best results will be obtained when using bath temperatures which are just within the most useful operating range of the bath The farther apart the calibration temperatures the larger will be the calibrated temperature range but the calibration error will also be greater over the range If for instance 50 and 150 C are chosen as the cali bration temperatures then the bath may achieve an accuracy of say 0 03 C over the range 40 to 160 C Choosing 80 and 120 may allow the bath to have a better accuracy of maybe 0 01 over the range 75 to 125 C but out side that range the accuracy may be only 0 05 Measuring the set point error The first step in the calibration procedure is to measure the temperature errors including sign at the two calibration temperatures First set the bath to the lower set point which we will call tj Wait for the bath to reach the set point and allow 15 minutes to stabilize at that temperature Check the bath stabi
40. ding the controller heaters blower and pump circuits 2 The Heater Power switch has three positions Low Medium and High Low and Medium are used for control functions while High is used only to raise the bath temperature The Low Medium and High positions rep resent approximately 250 500 and 1000 watts of heating power respectively 3 The Boost Heater is used to increase the upward temperature scan rate This heater is also controlled by the temperature controller so that the controller will stop the temperature rise when the set temperature is reached This switch must be off for good constant temperature control 4 The Boost Heater Indicator serves as a reminder that the heater is on Turn the boost heater off when desired temperature is reached 5 a The Cooling Light shows blue when the blower is on Turn the blower off when the set temperature is reached 6 wm The Cooling Blower Switch turns on the blower that circulates cooler room air around the hot bath tank in order to lower its temperature at a faster rate When the blower is turned on the blower vent on the left side near the rear of the bath see Figure 5 must be opened It must be closed again for control Note The cooling blower may be used at low tempera tures to provide added heat loss for controlling the bath Cold bath controls 7 The Power switch controls power to the entire cold bath including the controller heaters re
41. dition The message will continue to flash until the temperature is reduced and the cut out is reset The cutout has two modes automatic reset and manual reset The mode de termines how the cutout is reset which allows the bath to heat up again When in automatic mode the cutout will reset itself as soon as the temperature is low ered below the cutout set point With manual reset mode the cutout must be re set by the operator after the temperature falls below the set point When the cutout is active and the cutout mode is set to manual reset then the display will flash cutout until the user resets the cutout To access the re set cutout function press the SET button SET Access cutout reset function 33 7013 Calibration Bath User s Guide
42. e 40 7 8 C To accept the new setting and access the cutout set point press SET Pressing EXIT will exit the secondary menu ignoring any changes just made to the pro portional band value SET Accept the new proportional band setting Cutout As a protection against software or hardware fault shorted heater triac or user error the bath is equipped with an adjustable heater cutout device that will shut off power to the heater if the bath temperature exceeds a set value This protects the heater fluid bath materials and user s devices from excessive tempera tures The cutout temperature is programmable by the operator from the front panel of the controller The cutout can be set to any temperature between 0 C and the upper limit of the bath If the cutout is activated because of excessive bath temperature then power to the heater will be shut off and the bath will cool The bath will cool until it reaches a few degrees below the cutout set point temperature At this point the action of the cutout is determined by the setting of the cutout mode parameter The cutout has two modes automatic reset or manual reset If the mode is set to automatic then the cutout will automatically reset itself when the bath tem perature falls below the reset temperature allowing the bath to heat up again If the mode is set to manual then the heater will remain disabled until the user manually resets the cutout The cutout set point may be
43. e 29 7013 Calibration Bath User s Guide 30 6 3 24 68 C Bath temperature display When SET is pressed the display will show the set point memory that is cur rently being used and its value Eight set point memories are available Access set point selection Press SET to select this memory and access the set point value SET Access set point value t 2500 current value of set point 1 25 00 Press UP or DOWN to change the set point value Increment display C 50 00 New set point value Press SET to accept the new value and display the vernier value The bath be gins heating or cooling to the new set point SET Store new set point access vernier 8 00000 Current vernier value Press EXIT and the bath temperature will be displayed again Return to the temperature display 24 13 C Bath temperature display The bath will heat or cool until it reaches the new set point temperature The control indicator indicates the action of the controller Control indicator The control indicator light shows whether the bath is heating or cooling When the light glows green the bath temperature is higher than the set point and the bath requires cooling When the light is red the temperature is lower than the set point and the controller is attempting to heat the bath When the tempera ture reaches the set point the light will quickly alternate between red and green as the heater turns
44. e These sole noids are powered by the refrigeration mode switch on the front panel 11 Appendix B R507 System 11 11 1 11 2 Appendix B Refrigeration charging and evacuation Whenever either the R507 or the ethylene system is opened such that the entire charge is lost the system must be evacuated before it can be recharged If a thermistor vacuum gauge that registers in microns is available evacuate the system to 30 to 50 microns this usually takes 4 to 6 hours with a 4 5 CFM pump This is a low enough vacuum to insure that all moisture is out of the system WARNING Moisture in the systems can cause component damage and inefficient operation of the unit WARNING DO NOT use a leak detector with ethylene gas in the system R507 System This system should be charged with approximately 1 5 pounds of R507 refrig erant After this is done turn the system to the single stage mode Let it run for a few minutes until equilibrium is reached and then check the sight glass to make sure that no gas bubbles are present The pressure gauge PG 1 should read 0 psi adjust AEV 1 if required Ethylene System Two types of refrigerants are used in this system CP grade ethylene and CP grade propane The propane is used to help reduce the viscosity of the refriger ation oil at low temperatures in the evaporator First evacuate the system to 50 microns Next add CP grade propane until pressure is 10 psi Allow the system to settl
45. e for 10 or 15 minutes to insure that the system pressure has equalized This process may have to be done a number of times before the static pressure remains constant at 10 psi Next add ethylene until the system charge reaches 150 psi The system will tend to absorb some ethylene making it necessary to add small amounts to top off the charge until the pressure becomes stable After the systems are charged they are ready to run Two things however need to be watched for First excessively high head pressures over 250 psi for either system that continue after five minutes of running can indicate system contam inants Second should the suction pressure of the ethylene system go below 6 or 7 inches of mercury it is possible that moisture is present in the system and has frozen in the end of the capillary tube CT 1 In either case the charge must be dumped and the system re evacuated 57 12 Appendix C Replacement parts list 12 Appendix C Replacement parts list This appendix contains the replacement parts list for the Hart Scientific Model 7013 calibration bath The sectional breakdown along with diagrams and de scriptions in the other appendices of this manual will help identify The required components When ordering parts be sure to include the following information e Bath Model Number e Bath Serial Number e Part Number e Part Description The serial number information is found on the label on the back of the bath
46. e problem of damaged components due to excessively high static pressures PG 2 Pressure Gauge This gauge located on the bottom front right of the Model 7013 bath monitors the pressure that exists in the system after the capillary tubing and before the compressor When the system is turned on the pressure will slowly come down until it nears the 0 psi mark The pressure at this point is approximately equal to the compressor suction pressure This gauge may also be used to check sys tem charge When the system components have reached pressure equilibrium at room temperature approximately 25 C it should read 140 150 psi EC 1 Evaporator Coil The ethylene evaporator coil is located on the interior of the cold tank This di rect contact with the liquid to be cooled gives the greatest efficiency of heat transfer Caution should be taken to insure that these coils are not bent or dam aged when removing or replacing the lid 55 7013 Calibration Bath User s Guide 56 10 2 10 2 1 10 2 2 10 2 3 10 2 4 10 2 5 10 2 6 10 2 7 10 2 8 R507 System AEV 1 Automatic Expansion Valve This valve controls the evaporative pressure of the R507 going to the coils on the side of the cold tank It is set nominally at 0 psi for maximum efficiency over its cooling range This valve is only in operation when cooling with the single stage mode TEV 1 Thermostatic Expansion Valve This valve controls the cooling of the Cascade
47. erature Change Heater Power Cooling Mode range 100 to 40 C change 4 Low or Med Two Stage change gt 4 High Two Stage change gt 10 High Single Stage range 40 to 70 C change lt 4 C Low or Med Two Stage change 4 to 4 Low or Med Single Stage change gt 4 High Single Stage When the desired temperature is reached set the heating and refrigeration con trols to maintain a constant temperature The recommended settings are shown on the following chart Temperature Heater Power Refrigeration 100 to 60 C Low Two Stage 60 to 40 C Med Two Stage 40 to 0 C Med Single Stage 0 to 60 C Med Single Stage above 60 C Med Of Controller Adjustments When the bath reaches the set point temperature allow another 10 to 15 min utes for the temperature to stabilize The control indicator will flash at a con stant rate when the temperature reaches the set point The heating power may be viewed on the digital display to verify that the temperature is steady This is explained in Section7 6 in the next chapter To obtain optimum control stability the controller proportional band may be adjusted as discussed in Section7 7 If fine adjustment of the temperature is needed the digital vernier control can be set see Section7 3 3 When setting the set point temperature be careful not to exceed the temperature limit of the bath fluid or devices placed in the bath The over
48. et point and subsequent parameters in the menus and to set parameters to new values DOWN Used to decrement the displayed value of parameters UP Used to increment the displayed value EXIT Used to exit from a menu When EXIT is pressed any changes made to the displayed value will be ignored 3 The control indicator is a two color light emitting diode LED This lets the user visually see the ratio of heating to cooling When the indica 19 7013 Calibration Bath User s Guide tor is red the heater is on and when it is green the heater is off and the bath is cooling 5 2 Control panels The control panels Figure 4 are located at the front of each bath Each control panel is unique to its bath Figure 4a shows the control panel for the hot bath 7013 HIGH PRECISION BATH 60 C to 300 C Hart Scientific HEATING 3 BOOST HEAT ON 2 ON 6 COOLING FAN 5 7013 HIGH PRECISION BATH 100 C to 70 C Hart Scientific HEATING STAGE 1 8 STAGE 2 eli 17 Me antium 7 R404 a Evaporator NS Pressure Tpyically 0 psi in single stage operation C Figure 4 Power Control Panel 20 5 Description of parts and controls Control panels 5 2 1 5 2 2 while Figure 4b shows the cold bath control panel Figure 4 c shows the center panel pressure gauge Hot bath controls 1 The Power switch controls power to the entire hot bath inclu
49. et temperature units to u nits f u f Fahrenheit Secondary Menu Read proportional band setting pr op band pr pr 999 9 pr 15 9 Set proportional band to n pr op band n pr 8 83 Depends on Configuration Read cutout setting c utout 9999 x Xxx c 620 C in Set cutout setting c utout n r eset Set cutout to n degrees c utout n c 500 Temperature Range Reset cutout now c utout r eset c r Read heater power po wer po po 9999 po 1 duty cycle Configuration Menu Probe Menu Read RO calibration parameter 0 r r0 999 999 r0 100 578 Set RO calibration parameter to r 0 n r 100 324 98 0 to 104 9 Read ALPHA calibration al pha al al 9 9999999 8l 0 0038573 parameter Set ALPHA calibration parameter al pha n al 0 0038433 00370 to ton 00399 Operating Parameters Menu Read cutout mode cm ode cm cm XXXX cm AUTO Set cutout mode cm ode r eset a uto RESET or AUTO Set cutout to be reset manually cm ode eset cm r 67 7013 Calibration Bath User s Guide Table 3 Interface Command Summary continued Command Command Returned Acceptable Command Description Format Example Returned Example Values Set cutout to be reset cm ode a uto cm a automatically Serial Interface Menu Read serial sample setting sa mple sa sa 9 sa 1 Set serial sampling setting to n sa mple n sa 0 0 to 4000 seconds Set
50. fluid for temperature control over the range of 5 to 70 Flammable fluids may be used with extreme care taking all ap propriate safety precautions If the fluid should become contaminated or degraded beyond usability replace it as previously described Temperature controller Should the temperature controller become inoperative call the factory for in structions on returning it for repair 9 Repair and maintenance Probe 9 6 9 7 Probe Rear Panel Probe Connector RTD Sensor 100 Ohms 0 C 109 Ohms 25 C Figure 12 Control Probe Connections The probe is a precision platinum sensor housed in a stainless steel sheath The probe is sensitive to shock so must always be handled carefully A damaged probe may cause inaccuracy poor stability overheating or overcooling Refrigeration The refrigeration of the Model 7013 consists of two compressors The first compressor or high stage may be used to either cool the tank directly or to cool the low stage compressor in a cascade system where the low stage cools the tank The air cooled condenser and the de super heat coil at the front of the unit will both require occasional cleaning When dust buildup becomes noticeable re move the front grill by taking out the three thumbscrews located on its under side Compressed air or a vacuum may then be used to clean the system Dust buildup blocks air flow causing high head pressures with reduced system ca 53
51. fluid level is too low Check the fluid level regularly Also make sure the fluid is being circulated properly This is important to main tain a constant temperature in the tank If ice or other foreign matter builds up in the wells the orifices may become blocked causing poor circulation or over flow If excessive water or ice accumulates in the cold bath it may be removed by raising the temperature of the bath above 100 C until the moisture boils off Do not operate at this temperature for too long or much of the heat transfer fluid may be lost by evaporation WARNING Use of the cold bath for long periods at low temperatures may produce sufficient ice buildup to block the overflow holes Occasion ally check the system and remove ice Power up Turn on the hot bath or cold bath with the power switch The digital display will initialize and begin to display the temperature The temperature controller will begin to heat or cool the bath to reach the programmed set point The set point can be changed to a new temperature if desired Setting the temperature In the following discussion a solid box around the word SET UP DOWN or EXIT indicates the panel button to press while the dotted box indicates the dis play reading on the front panel Explanation of the button function or display reading is written at the right To view or change the set point proceed as follows The front panel LED display normally shows the actual bath temperatur
52. frigeration and pump circuits 8 The Heater Power switch like that on the hot bath has three positions Low Medium and High Low and Medium are used for control while High is used only for quicker heating The Low Medium and High posi tions represent approximately 250 500 and 1000 watts of heating power respectively 9 The Refrigeration Mode switch has three positions They are STAGE 1 OFF and STAGE 2 The Stage 1 position turns on only one of the two compressors in the unit The single stage system is used from 40 C to 70 The refrigeration can be turned off above 60 for higher stability Two stage operation is used for the lower temperatures below 40 C With two stage operation the single stage compressor by means of sole noid valves becomes the high stage of the system Its function is to cool the condenser of the low stage which in turn cools the bath The low stage compressor will not turn on until the high stage has cooled the cas 21 7013 Calibration Bath User s Guide CAUTION HIGH TEMPERATURE EXHAUST VENT CAUTION HIGH TEMPERATURE EXHAUST VENT Figure 5 Cooling Blower Vent 5 3 22 cade condenser sufficiently This takes several minutes if the unit has been off for some time 10 The STAGE 1 light indicates when the single stage compressor is on The Stage 1 indicator will turn on in either the single or two stage modes 11 The STAGE
53. g of these parameters is im portant to the safety and proper operation of the bath The calibration parameters menu is indicated by CAL i Calibration parameters menu Press SET five times to enter the menu CTO Parameter CTO sets the calibration of the over temperature cutout This is not adjustable by software but is adjusted with an internal potentiometer For the cold bath this parameter should read between 110 C and 130 C For the hot bath this parameter should read between 310 C and 330 C BO BG CO and CG These parameters calibrate the accuracy of the bath set point and BG appear with the cold bath and CO and appear with the hot bath These are programmed at the factory when the bath is calibrated Do not alter the value of these parameters HandL These parameters set the upper and lower set point limits of the bath DO NOT change the values of these parameters from the factory set values To do so may present danger of the bath exceeding its temperature range causing damage or fire 45 8 Bath calibration Calibration points 8 1 8 2 8 3 Bath calibration In some instances the user may want to calibrate the bath to improve the tem perature set point accuracy Calibration is done by adjusting the controller probe calibration constants R and ALPHA so that the temperature of the bath as measured with a standard thermometer agrees more closely with the bath set point The thermometer use
54. g the interface the HEATER POWER and BOOST HEATER switches must be set to the OFF position The REFRIGERATION MODE and the COOLING BLOWER switches must also be set to OFF Digital Interface Setup HEATER switches LOW BOOST switch OFF BLOWER switch OFF REFRIGERATION switch OFF Serial communications The bath may be installed with an RS 232 serial interface that allows serial dig ital communications over fairly long distances With the serial interface the user may access any of the functions parameters and settings discussed in Section 7 with the exception of the baud rate setting Wiring The serial communications cable attaches to the bath through the D 9 connec 65 7013 Calibration Bath User s Guide 66 13 1 2 tor on the front panel Figure 13 shows the pin out of this connector and sug gested cable wiring RS 232 Cable Wiring for IBM PC and Compatibles Instrument Computer DTE Connector Connector DB 9 Pin DB 9 Pin 1NC 1DCD 2 RxD 2 RxD 3TxD O 3TxD 4NC 4DTR 5 GND 5 GND 6NC 6 DSR 7RTS jU 7 RTS 8CTS Uu 8 CTS 9NC 9NC Instrument Computer DTE Connector Connector DB 9 Pin DB 25 Pin INC 2RxD e e 2TxD 3TxD e 3 RxD 4NC 4 RTS 5GNDe U 5 CTS 6 NC aa 6 DSR 7 RTS ig 227 GND 8CTS 8DCD 9NC 20 DTR Figure 13 Serial Cable Wiring Setup Before operation the serial interface of
55. he following authorized Service Centers to coordinate service on your Hart product Hart Scientific Inc 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 31 402 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 6 512 3436 Telefax 86 10 6 512 3437 E mail xingye han fluke com cn Fluke South East Asia Pte Ltd Fluke ASEAN Regional Office Service Center 1 Before You Start Authorized Service Centers 60 Alexandra Terrace 03 16 The Comtech Lobby D 118502 SINGAPORE Phone 65 6799 5588 Telefax 465 6799 5588 E mail antng singa fluke com When contacting these Service Centers for support please have the following information available e Model Number e Serial Number e Voltage e Complete description of the problem 2 Specifications Specifications Hot Bath Cold Bath Ranget 60 to 300 C 100 to 70 5 C 100 C to 40 C amp 150 C to 300 C 1 C 40 C to 150 C Stability 0 05 C 100 C to 40 C amp 150 C to 300 C 0 01 C 40 C to 150 C Stab
56. i TR 71 13 2 1 1 IEEE 488 interface address 1 tu a aca A a l Gi a l uoo RO 71 13212 End ofstring ss o og sub dec due ee Ge at RUD drame lg EUER 71 13 2 2 488 71 13 3 Interface commands 22220255 he 250 x voy OC il aes 71 13 4 Power control functions 72 13 4 1 Hot bathicontroL 3 2 ese Mat al NUM sue te 72 13 4 2 Cold bath Control 5 amp 2 0 GN Qe eed 73 iii 14 Appendix E Wiring Diagram Figures and Tables Table 1 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Table 2 Table 3 Table 4 Table 5 Table 6 Figure 14 International Electrical Symbols 1 Heat exchange fluids and 1 12 7013 System Block Diagram 16 Temperature Control Panel 19 Power Control Panel 52 ae hoe EN a REUS EU 20 Cooling Blower Vent 22 System ee ara wis m W RO MSN E 24 Back panel mass LUE Due sue l S w esse 25 Pump Lid Assembly 27 Controller Operation Flowchart 34 Proportional Band 44 6 ga be Re ERR une RES 39 Calibration Example 49 Control Probe Connection
57. ibrated Symbols Used Table 1 lists the International Electrical Symbols Some or all of these symbols may be used on the instrument or in this manual Table 1 International Electrical Symbols Symbol Description A AC Alternating Current 7 AC DC Battery CE Complies with European Union Directives s n DC Double Insulated 7013 Calibration Bath User s Guide 1 3 1 3 1 Symbol Description O P P I P lt Electric Shock Fuse PE Ground Hot Surface Burn Hazard Read the User s Manual Important Information Off On Canadian Standards Association OVERVOLTAGE Installation CATEGORY II Pollution Degree 2 per IEC1010 1 re 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 C TIC Australian EMC Mark The European Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC mark Safety Information Use this instrument only as specified in this manual Otherwise the protection provided by the instrument may be impaired 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
58. ilization Time 60 minutes 100 C to 40 C 15 minutes 40 C to 150 C 25 minutes 150 C to 300 C Uniformity 0 05 C Heating Cooling Rates 45 minutes 25 C to 300 C at 230 180 minutes 25 C to 100 C VAC Heater s Low 250W Medium 500W High 1000W Power Requirements 230 VAC 10 60 Hz single phase 5520W NOTE See the installation instructions before powering unit Compressors re quire 230 VAC nominal System Fuse 15A 250V F 20A 250V T Heater Fuse 10 250V F 10A 250V F Test Well Dimensions 2 6 dia x 11 3 inches deep from outlet holes to bottom of well 60 cubic inches in volume 0 25 inches deep mercury trap on bottom Cooling Heat loss to ambient cooling used dur High Stage ing control Forced air blown through R 507 refrigerant air cooled cavity around bath for lowering Low Stage temperatures Ethylene with some propane to help oil flow refrigerant air cooled Single Stage System Uses High Stage compressor only Cascade System Uses both High amp Low stage compressors Heat Transfer Fluids DOW 710 Halocarbon 0 8 Exterior Dimensions 45 25 L x 26 25 W x 45 H inches 39 H to working surface Weight Instrument 450 Ibs Shipping 600 Ibs Range applies only when using specified fluids 3 Installation Unpacking 3 1 3 2 3 3 Installation Unpacking Caution is advised in transporting and unpacking the bath
59. into the baths before they are used Remove the pump lid assemblies and inspect Check the inside of the outer fluid tanks and the test wells for foreign matter If any is found remove it to avoid interference with operation 11 7013 Calibration Bath User s Guide WARNING Be sure the drain is securely capped before filling see Fig ure 7 Remove the ambient guard Pour in the heat transfer fluid until it is 4 0 inches from the top for the cold bath or 5 5 inches from the top for the hot bath see Figure 1 Overfilling may cause tank overflow and slower scan times Figure 1 Heat exchange fluids and levels 3 Installation Power requirements 3 4 Underfilling may reduce bath stability and may possibly damage the heaters Care should be taken to maintain cleanliness Use a funnel and immediately clean up spills Only clean unpolluted oils should be used When the bath is filled to the specified level replace the ambient guard Inspect the probes They should not be bent or damaged in any way The probes used with the Model 7013 contain precision platinum sensors They are shock sensitive and must be handled carefully Each probe should be plugged into its connector on the rear of the correspond ing bath It is then inserted fully into the hole located near the pump motor on the pump lid assembly See Figures 7 and 8 Plug each pump power cord into the receptacle located on the rear panel of the bath marked
60. limit is not exceeded in the air above the instrument The instrument and any thermometer probes used with it are sensitive instru ments that can be easily damaged Always handle these devices with care Do not allow them to be dropped struck stressed or overheated COLD BATHS Refrigerated baths require that the condensing coil be cleaned periodically Ac cumulation of dust and dirt on the condenser will result in premature failure of the compressor This bath has been equipped with a brownout and over voltage protection de vice as a safety feature to protect the system components Mode of Operation This bath needs to be plugged into the line voltage for at least 2 minutes before operation This is only necessary for the first time the bath is energized or when it is moved from one location to another Turning the bath ON or OFF does not trigger the delay If a High Low voltage condition exists for longer than 5 seconds the bath de energizes An amber indicator on the back panel lights when this condition exists Re energization is automatic upon correction of the fault condition and after a delay cycle of about 2 minutes If a fault condition exists upon application of power the bath will not energize Under and Over Voltage Protection at 230 VAC e Voltage Cutout 12 5 203 257 VAC e Voltage Cut In 7 5 213 247 VAC 7013 Calibration Bath User s Guide 1 4 Authorized Service Centers Please contact one of t
61. lity with the thermometer When both the bath and the thermometer have stabilized measure the bath temperature with the thermometer and compute the tempera ture error err which is the actual bath temperature minus the set point temper ature If for example the bath is set for a lower set point of t 50 C and the bath reaches a measured temperature of 49 7 C then the error is 0 3 C Next set the bath for the upper set point t and after stabilizing measure the bath temperature and compute the error erry For our example we will suppose the bath was set for 150 C and the thermometer measured 150 1 C giving an error of 0 1 C Computing R and ALPHA Before computing the new values for Ro and ALPHA the current values must be known The values may be found by either accessing the probe calibration 47 7013 Calibration Bath User s Guide 48 menu from the controller panel or by inquiring through the digital interface The user should keep a record of these values in case they may need to be re stored in the future The new values Ry and ALPHA are computed by entering the old values for RO ALPHA the calibration temperature set points tj and ty and the temperature errors err and erry into the following equations ty T t E ALPHA 1 1 ALPHA t err 1 ALPHA t erry ty f H1 ALPHA ALPHA If for example Ro and ALPHA were previously set for 100 000 and 0 00
62. ll set the heater power to MEDIUM The boost heater is simi larly controlled by command F3 to set it on 1 or off 0 Giving the com 13 Appendix D Digital interface Power control functions 13 4 2 mands with no parameter 0 or 1 will query the bath for the current function setting Table 6 Hot Bath Control Functions Function Seetting F1 F2 F3 F4 Low Heat 0 0 x X Medium Heat 1 0 x X High Heat x 1 x X Blower X X X 1 Boost Heat X X 1 X Note x indicates that the command is disabled in this function Cold bath control To control the refrigeration power of the cold bath with the digital interface the front panel Refrigeration Mode switch must be OFF and the Heater Switch must be set to LOW The Stage 1 Cooling is controlled on or off with the F3 command for ON and 0 for OFF The stage 2 is controlled with the F4 command 0 for LOW and 1 for HIGH as shown in Table 5 along with the heater functions Table 5 Cold Bath Control Functions Function Setting F1 F2 F3 F4 Low Heat 0 0 x x Medium Heat 1 0 x X High Heat x 1 x X Stage 1 Cooling X x 1 x Stage 2 Cooling X x X 1 Vote x indicates that the command is disabled in this function 73 14 Appendix E Wiring Diagram 14 Appendix E Wiring Diagram 126 wies JG
63. ly on each bath consists of the lid test well pump stirrer assembly ambient guard probe probe clamp and lid clamping screws See Figure 8 The lid is made of brushed stainless steel for protection against corrosion The test well pump stirrer etc attach to the lid to make a single unit which is at tached and fixed in location by the four lid clamping screws located on the sides of each lid The lid is sealed against the tank with a teflon gasket The lid is insulated to protect the fluid from the ambient temperature The test well provides the temperature controlled chamber for calibration of immersion type temperature devices A constant fluid level is maintained in this device by the pump This fluid reduces stem effects and always provides an im mersion depth of 11 3 inches The bottom 4 inch of the test well serves as mercury trap If mercury bulbs are inadvertently broken the mercury will fall into this cavity The pump lid assembly may then be removed and the mercury dumped out Note that this design prevents the probe being calibrated from coming in contact with any stirring heating cooling or temperature sensing elements WARNING Use of the cold bath for long periods at low temperatures may produce sufficient ice buildup to block the overflow holes To prevent fluid loss and damage due to fluid escaping the test well occasion ally check the system and remove ice To remove accumulated water raise the bath temperature
64. ments to be connected and controlled simultaneously Setup To use the IEEE 488 interface first connect an IEEE 488 standard cable to the port on the bath fornt panel Next set the device address This parameter is pro grammed within the IEEE 488 interface menu The IEEE 488 interface param eters menu is outlined in Figure 9 on page 34 To enter the IEEE 488 parameter programming menu first press EXIT while pressing SET and release to enter the secondary menu Press SET repeat edly until the display reaches Pr Gb E This is the menu selection Press UP repeatedly until the IEEE 488 interface menu is indicated with IEEE Press SET to enter the IEEE 488 parameter menu The IEEE 488 menu contains the IEEE 488 address parameter IEEE 488 interface address The IEEE 488 address is prompted with Addr E55 Press SET to program the address The default address is 22 Change the device address of the bath if necessary to match the address used by the communication equipment by pressing UP or DOWN and then SET End of string The end string EOS character can be set to carriage return CR linefeed LF or both Any data string transmitted from the bath with be terminated ac cording to this setting The bath will interpret either a CR or LF character recieved as EOS IEEE 488 operation Commands may now be sent via the IEEE 488 interface to read or set the tem perature or access other controller
65. nd their respective baths The fluid is drained by unscrewing the cap see Figure 6 The bath fluid will drain more quickly if it is warm enough to reduce its viscosity However it must be cool enough so as not to present a safety hazard A WARNING Be sure that the fluids are at a safe temperature before drain ing tanks or removing the lid assembly When refilling the tank be sure that the cap is screwed on tight and then follow instructions in section 3 3 Mercury spill The bottom of the test well serves as a mercury trap If a spill occurs remove the pump lid assembly as described in the previous section Carefully hold the pump lid assembly vertically so that the mercury will not run out through the pump Mercury in the trap may be removed by inverting the test well over an appropriate disposal container Inspect the fluid tank to see if any mercury has 51 7013 Calibration Bath User s Guide 52 9 4 9 5 escaped the trap Any mercury found there may be maneuvered into the drain hole located at the center of the tank bottom and then flushed out Heat transfer fluids The heat transfer fluids recommended for the Model 7013 are Dow 710 for the hot system and Halocarbon 0 8 for the cold system These fluids will cover the entire range of their respective baths Other fluids may be used within their use ful temperature ranges as long as they are compatible with the materials of con struction Water is the overall best
66. nute The heater power display is accessed in the secondary menu Press SET and EXIT simultaneously and release The heater power will be displayed as a fer on of full power Access heater power in secondary menu i2 Pct Heater power in percent To exit out of the secondary menu press EXIT To continue on to the propor tional band setting function press SET Proportional band In a proportional controller such as this the heater output power is proportional to the bath temperature over a limited range of temperatures around the setpoint This range of temperature is called the proportional band At the bot tom of the proportional band the heater output is 100 At the top of the pro portional band the heater output is 0 Thus as the bath temperature rises the heater power is reduced which consequently tends to lower the temperature back down In this way the temperature is maintained at a constant temperature The temperature stability of the bath depends on the width of the proportional band See Figure 10 If the band is too wide the bath temperature will deviate excessively from the set point due to varying external conditions This is be cause the power output changes very little with temperature and the controller cannot respond very well to changing conditions or noise in the system If the proportional band is too narrow the bath temperature may swing back and forth 7 Controller operation Proportional band
67. on and off to maintain the proper amount of heat 6 General operation Hot bath controls 6 4 6 5 Indicator color Control action Green Cooling Red Heating Flashing Controlling Hot bath controls The heating controls may require adjustment to more quickly reach the desired temperature when the set point is changed The following chart shows what the heating switches should be set to depending on the required temperature change These are approximate settings and they may vary depending on your jlab environment and your bath use Temperature change Controls lt 2 Blower on 210 4 Low or Medium heater gt 4 C High or Boost heater When cooling in excess of 1 or 2 C is required open the blower vent see Fig ure 5 and Section5 2 1 on the left side of the bath and then turn on the blower When the desired temperature is reached turn the blower off close the blower vent and switch the heater power to Low or Medium Select the recommended heater power from the following chart depending on the temperature Temperature range Heater Power 60 to 200 C Med 200 to 300 C High Cold bath controls The following chart shows what the cold bath controls should be set to depend ing on the required temperature change These are approximate settings and they may vary depending on your jlab environment and your bath use 31 7013 Calibration Bath User s Guide 6 6 32 Range and Temp
68. operate the bath without the probes inserted in the wells and connected to the controller or without the wells filled with fluids 27 7013 Calibration Bath User s Guide 28 A probe clamp stand is provided to hold devices such as SPRTs probes being calibrated etc It consists of a 4 inch diameter post mounted in a base on the bath lid A clamp may be attached to it and adjusted to hold the desired instru ment in a fixed position The lid clamping screws are to be tightened snugly but not over tightened or the lid could be damaged Standoffs on the tank side stop the travel of the lid as it is tightened and keep it level 6 General operation Power up 6 1 6 2 General operation This chapter contains general information on how the bath is operated such as how to set the temperature and how to adjust the controls Operation of the temperature controller is explained in more detail in the next chapter It is as sumed that the bath has been properly connected to AC power the wells filled with fluids and the probes placed and connected as explained in Chapter3 on installation The user should also be familiar with all the controls and features and their functions as described in Chapters The user must keep in mind a few precautions Check the fluid regularly to make sure the level is correct Heaters may be damaged if the fluid level is too low Too much fluid may cause overflow CAUTION Heaters may be damaged if the
69. r case although upper case may be used Spaces may be added within command strings and will simply be ignored Backspace BS ASCII 8 may be used to erase the previous character Power control functions The digital interface is capable of controlling the heating and cooling functions so that the bath can be remotely operated at any temperature within the range of the bath allow the interface to control the heating and the cooling the front panel controls must be disabled by switching all controls except the main power switches to OFF The hot and cold baths each have four control functions with the digital inter face For the hot bath these are 1 Medium Heater 2 Blower Fan 3 High Heater and 4 Boost Heater For the cold bath these are 1 Medium Heater 2 Stage 1 Cooling 3 High Heater and 4 Stage 2 Cooling These functions are summarized in Tables 6 and 5 and sample commands are shown in Table 2 starting on page 67 Hot bath control To control the heaters with the digital interface the front panel heater switch must be set to LOW and the Boost Heater and Blower Fan need to be set in the OFF position The heater function is controlled with the F1 and F2 commands F4 controls the Blower Fan and F3 controls the Boost Heater These commands are either set to 0 or 1 according to Table 6 The default set tings are F1 0 and F2 0 which is LOW For example the commands F1 1 and 2 0 wi
70. rance to allow for safe and easy inser tion and removal of probes The instrument is intended for indoor use only The bath is a precision instrument Although it has been designed for optimum durability and trouble free operation it must be handled with care Position the bath before the tank is filled with fluid by rolling it into place DO NOT at tempt to lift the bath DO NOT move a bath filled with fluid BURN HAZARD Extremely cold temperatures may be present in this equipment Freezer burns and frostbite may result if personnel fail to observe safety precautions High temperatures may be present in this equipment Fires and severe burns may result if personnel fail to observe safety precautions ELECTRICAL HAZARD These guidelines must be followed to ensure that the safety mechanisms in this instrument will operate properly This instrument must be plugged into an out let as specified in Section 2 Specifications The power cord of the instrument is equipped with a three pronged grounding plug for your protection against elec trical shock hazards It must be plugged directly into a properly grounded three prong receptacle The receptacle must be installed in accordance with lo 7013 Calibration Bath User s Guide 1 3 2 cal codes and ordinances Consult a qualified electrician DO NOT use an extension cord or adapter plug DO use a ground fault interrupt device This instrument contains a fluid A ground fault device
71. re control system consists of an insulated fluid tank constant fluid level test well pump stirrer integrated heater and cooler calibrated tem perature control probe temperature controller and ambient guard The stainless steel fluid tank serves as an insulated fluid reservoir for the heat transfer fluid Heat transfer for heating and cooling takes place in its walls from an integrated heating and cooling unit This unique design allows for maximum temperature stability with maximum fluid temperature uniformity The heat transfer fluid must be well stirred to maintain high stability This is accomplished with the pump stirrer which is a combination centrifugal pump and propeller stirrer device The fluid is pumped from the tank into the test well It fills the test well until it reaches the overflow holes in the top The fluid then flows back into the tank Hence a constant fluid level is maintained in the test well regardless of fluid expansion contraction or loss by evaporation As the fluid circulates it passes by the temperature control probe Temperature deviations from its calibrated set point are detected by the temperature control ler and the needed corrections made to the heating The cooling provided either by the refrigeration or by heat loss through the tank walls is constant The tem perature controller counters this cooling effect with pulsed power through the resistance heating elements The ambient guard see Figures 6 and
72. s 53 Serial Cable Wiring 66 Interface Command Summary 67 Interface Command Summary continued 68 Interface Command Summary continued 69 Cold Bath Control Functions 73 Hot Bath Control Functions 73 7013 Wiring Diagram 75 1 Before You Start Introduction 1 1 1 2 Before You Start Introduction The Hart Scientific Model 7013 is a precision dual temperature calibration bath The cold bath has a normal operating range of 100 C to 70 C and the hot bath has a range of 60 C to 300 C for a 400 C overall range It is capable of rapid heating and cooling rates and is highly stable and accurate at all tem perature settings The Model 7013 consists of two independently operable bath systems Each bath has its own tank with a constant level test well and pump Each has its own temperature controller probe and heating and cooling systems Separate front panel power controls labeled Hot Bath and Cold Bath allow independent power up and use The temperature controller can be directly set to 0 01 C with the but ton switches and digital display on the front panel A digital vernier may be used to adjust to intermediate temperatures The probe clamp and stand permits support of a temperature measurement stan dard probe or support of probes being cal
73. s 4 4 44 4 4 44 o o ie 35 7 3 2 Setpoint value asd mal helal e Qul Qi l 2k ai Lee 36 7 3 3 Setpoint Werner iu a a al p RHP AAR DR 36 Temperature scale units s 37 Secondary menu zu s p s kr asa a di KU Aer A S ds 37 Heater power 2 5 2X ee Y x 38 Proportional band 38 Cutouts o sess 2 c db X eee eet eens es wind 40 Controller configuration 41 Probe parameters menu 41 7 10 1 ip 41 7 10 2 ALPHA CT cae te cak ab ca dy OR y Aw lee 41 Operating parameters 42 7 11 1 Cutout Reset Mode nomm w RC REC A 42 Serial interface parameters 42 7 12 1 Baud rate e serg aid W QUL BR Bod ER MY d m x Rb uid 42 7 12 2 sample period ore d 2 Eae ste NIKA Ee 43 7 12 3 Duplex mode sessa dtm ep EROS RR PRSE 43 7 12 4 soe Nwe dan dirik v RU Io Gera e nas aa d ae Syn K NI SEES Que 44 IEEE 488 parameters menu 44 7 13 1 IEEE 488 address ioo o ec 5 mem NOI nce 44 Calibration parameters 45 7 14 1 pes D s w q eds Fes dR del OE HS l 3 45 7 14 2 BO BG CO and CG 95
74. serves the right to invoice Buyer for importation costs of repairs replacement parts when product purchased in one country is submitted for repair in another country Hart s warranty obligation is limited at Hart s option to refund of the purchase price free of charge re pair or replacement of a defective product which is returned to a Hart authorized service center within the warranty period To obtain warranty service contact your nearest Hart authorized service center or send the product with a description of the difficulty postage and insurance prepaid FOB Destination to the nearest Hart au thorized service center Hart assumes no risk for damage in transit Following warranty repair the prod uct will be returned to Buyer transportation prepaid FOB Destination If Hart determines that the failure was caused by misuse alteration accident or abnormal condition or operation or handling Hart will provide an estimate or repair costs and obtain authorization before commencing the work Following repair the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges FOB Shipping Point THIS WARRANTY IS BUYER S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IM PLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE HART SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCI
75. stance temperature rela tionship of the platinum control probe The probe parameters are accessed by pressing SET after the name of the parameter is displayed The value of the parameter may be changed using the UP and DOWN buttons After the de sired value is reached press SET to set the parameter to the new value Press ing EXIT will cause the parameter to be skipped ignoring any changes that may have been made RO This probe parameter refers to the resistance of the control probe at 0 C Nor mally this is set for 100 000 ohms ALPHA This probe parameter refers to the average sensitivity of the probe between 0 and 100 C Normally this is set for 0 00385 C 1 41 7013 Calibration Bath User s Guide 42 7 11 7 11 1 7 12 7 12 1 Operating parameters The operating parameters menu is indicated by PAr i Operating parameters menu DRAP OL EE TE ITR LEE LS Press SET to enter the menu The operating parameters menu contains the cutout reset mode setting Cutout Reset Mode The cutout reset mode determines whether the cutout resets automatically when the bath temperature drops to a safe value or must be manually reset by the operator The parameter is indicated by CEor5E Cutout reset mode parameter pnl Press SET to access the parameter setting Normally the cutout is set for manual mode CRETE LEE Serial interface parameters The serial interface
76. temperature up or down at a higher rate A boost heater increases the heat input to the bath in order to raise the temperature faster cooling blower is provided for lowering the tem perature The cooling blower circulates room air around the outside of the tank The blower vent at the left rear of the bath must be open when the cooling blower is on for scanning and closed to retain heat for constant temperature control 17 5 Description of parts and controls Temperature control panel 5 1 Description of parts and controls Temperature control panel The following controls and indicators are present on the controller front panels see Figure 3 below 1 the digital LED display 2 the control buttons and 3 the control indicator light Operation of the temperature controller is ex plained in detail in Section 6 SET DOWN UP 2 Figure 3 Temperature Control Panel 1 The digital display is an important part of the temperature controller It displays the set point temperature and bath temperature as well as the various other bath functions settings and constants The display shows temperatures according to the selected scale units C or F 2 The control buttons SET DOWN UP and EXIT are used to set the bath temperature setpoint access and set other operating parameters and access and set bath calibration parameters A brief description of the functions of the buttons follows SET Used to display the s
77. the bath must first be set up by pro gramming the baud rate and other configuration parameters These parameters are programmed within the serial interface menu The serial interface parame ters menu is outlined in Figure 9 on page 34 To enter the serial parameter programming mode first press EXIT while pressing SET and release to enter the secondary menu Press SET repeat edly until the display reads This is the menu selection Press UP repeatedly until the serial interface menu is indicated with Finally press SET to enter the serial parameter menu In the serial interface parameters menu are the baud rate the sample rate the duplex mode and the linefeed parameter 13 Appendix D Digital interface Serial communications Table 2 Interface Command Summary Command Command Returned Acceptable Command Description Format Example Returned Example Values Display Temperature Read current set point s etpoint S set 9999 99 C or F set 150 00 C Set current set point to n s etpoint zn s 450 Instrument Range Read vernier v ernier V v 9 99999 v 0 00000 Set vernier to n v ernier n v 00001 Depends on Configuration Read temperature temperature t t 9999 99 C or F t 55 69 C Read temperature units u nits u u X U C Set temperature units u nits c f CorF Set temperature units to Celsius u nits c u C S
78. to over 100 C but do not operate at this temperature for too long or too much of the heat transfer fluid may also evaporate The pump stirrer assembly both circulates the heat exchange fluid through the test well and stirs it within the tank Proper mixing of the fluid is essential for good constant temperature control The pump is powered by a 230 volt 60 Hz 1 500 RPM motor The ambient guard is mounted above the test well with two 4 turn thumb screws It is easily removed for inspection of fluid levels with the pump power 5 Description of parts and controls PROBE PROBE CLAMP STAND AMBIENT GUARD DRILL HOLES AS REQUIRED FOR APPLICATION MUST BE IN PLACE FOR GOOD CONTROL Pump lid assembly PUMP STIRRER ASSEMBLY LID CLAMPING SCREWS TEST WELL Figure 8 Pump Lid Assembly off It consists of a Teflon disk with the screw assemblies attached on opposite sides Teflon is used because of its temperature and chemical resistance The ambient guard reduces room temperature effects on the heat transfer fluid and also reduces evaporation The probe is inserted up to the hub into the hole indicated It must be in place for the bath to control Not having the probe in place could be a hazard both to the bath and devices placed in it for calibration Without the probe in the fluid or plugged in the bath may overheat The over temperature cutouts are de signed to help prevent damage from such conditions WARNING Never
79. ure controller 4 controls the temperature of the bath fluid The temperature is set by the buttons and digital display on the front panel The temperature is sensed by the platinum control probe 9 which is inserted into the fluid through the bath lid The controller s solid state relay circuit pulses power to the control heaters 5 mounted to the outside wall of the tank These heaters have three heating power settings high medium and low which are 1 000 500 and 250 watts respectively The low and medium positions are used for control while the high position is used only for moving quickly from one temperature to a higher one The heaters are protected by fuses These fuses are located behind the control panels The bath fluids are protected from reaching temperatures above factory set limits by over temperature cutouts within the controllers The hot bath is limited to approximately 310 C and the cold bath to approximately 110 C They can be programmed to activate at lower temperatures as well flashing on 15 7013 Calibration Bath User s Guide HOT BATH AMBIENT GUARD FLUID OVERFLOW BOOST HEATER HEAT LOSS oO TO AMBIENT COOLING BLOWER FOR COOLING COLD BATH AMBIENT GUARD FLUID OVERFLOW REFRIGERATION SINGLE STAGE LOW STAGE COOLING OR OR SYSTEM HIGH STAGE CASCADE TWO STAGE Figure 2 7013 System Block Diagram 16 4 Bath system overview the control display
80. when it is tripped Operation may be resumed by lowering the bath temperature and resetting the cutout Cooling is required to offset the heating to maintain constant temperature con trol The hot bath is cooled by heat transfer to the air The cold bath uses refrig eration as its primary cooling source At temperatures over 50 C the refrigeration may be turned off since heat loss to the room provides sufficient cooling The refrigeration system has two modes of operation It may be either single stage for use from below 50 C to 40 C or two stage cascade for 40 C to 100 C In the two stage mode the single stage part of the system becomes the high stage of the two stage cascade system The high stage cools the con denser of the low stage until it reaches a sufficiently low temperature before the low stage will start This takes several minutes The temperature controller is a precision device which utilizes proportional and integral control circuits A microprocessor controls the many operation func tions of the temperature controller The set point temperature cutout temperature and other operating and calibra tion parameters are set using the front panel buttons and digital display The control indicator light signals the action of the controller whether it is heating cooling or maintaining a constant temperature It lights red when the heater is on and green when it is off The hot bath has two features to facilitate scanning its
81. ys operate this instrument at room temperature between 41 F and 122 F 5 C to 50 C Allow sufficient air circulation by leaving at least 6 inches 15 cm of clearance around the instrument When filling the tank ensure the immersion coils are completely covered DO NOT overfill the bath Overflowing fluid may damage the electrical sys tem See Section 3 3 Bath Preparation and Filling for specific instructions Read Section 6 General operation before placing the bath into service DO NOT turn the bath on without fluid in the tank and the heating coils fully immersed 1 Before You Start Safety Information DO NOT change the values of the bath calibration constants from the factory set values The correct setting of these parameters is important to the safety and proper operation of the bath The refrigeration may be damaged or the lifetime shortened if the set point temperature is set above 60 for more than one hour with the refrigeration manually on Ensure that the refrigeration is off when the bath is used above 60 The Factory Reset Sequence should be performed only by authorized personnel if no other action is successful in correcting a malfunction You must have a copy of the most recent Report of Test to restore the test parameters DO NOT operate this instrument in an excessively wet oily dusty or dirty environment Most probes have handle temperature limits Be sure that the probe handle tem perature

7013 Users Guide 682..

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