9113 User Manual
Contents
1. NIHAO ggat Su ae ee ok ee a ea ok 20 9 2 8 eh vine ee ie Sr eee 20 9 Test Probe Calibration 21 9 1 Calibration 0 21 9 1 1 Direct Calibration 21 9 1 2 Comparison Calibration 0 a 21 9 1 3 Calibration of Multiple 22 9 2 Furnace Characteristics ob a 22 9 2 1 Vertical Gradient 22 9 2 2 Stabilization and Accuracy 22 10 Maintenance 23 11 Trouble Shooting 24 11 1 Troubleshooting 24 122 Wiring Diagrami ae a E a Ge o HOE ee aes Bae a Be 25 Figures and Tables Table 1 Specifications 8 Fig re Tt Top Panel eet a a hike 13 Figure 2 Temperature Controller enlarged view 14 Figure 3 Equilibration Block Assembly 16 Figure 4 Back Panels gosos matiti eee bo wa bab RE a 17 Figure 5 Serial Communications Wiring 20 Figure 6 Wiring Diagram 25 1 Introduction The mode2. Direct calibration involves testing a thermocouple probe directly against the furnace s temperature dis play The advantage of this method is that it is quick and easy Insert the probe to be calibrated into the well of the furnace calibrator The probe should fit snugly into the equilibration block yet should not be so tight that it cannot be easily removed Avoid any dirt or grit that may cause the probe to jam into the block Best results are obtained with the probe inserted to the full depth of the well Once the probe is inserted into the well allow adequate stabilization time to allow the test probe temperature to settle as described Once the probe has settled to the temperature of the well it may be compared to the calibrator display temperature The display temperature should be stable to within 0 75 C for best results Never introduce any foreign material into the probe hole of the insert Fluids etc can leak into the calibrator causing damage to the calibrator or binding and damage to your probe 9 1 2 Comparison Calibration Comparison calibration involves testing a probe against a similar reference probe The advantage to this method is that better accuracy can be achieved since errors due to furnace inaccuracy stem effect and drift can be reduced 9113 Portable Furnace After inserting the probes to be calibrated allow suf ficient time for the probes to settle and the tempera ture of the furnace to stabiliz
3. LYVH ON LOVHINOO Nv ol N cow zin 59 91001 538010 Nasonia HN KJ HOLIMS ASSY Od N manam 7 Sh Se THM X 1 01 N KAU TE MIS OIA LHM wei MISA3A LHM nua dng dats 22251 anp a 0 sasn Walsas a ae M3MOd NS NOJN F mu FAN NY9A3A pa Se TNO i Joi HOLIMS _ 1 sii eel TOW 1 ji TWNOILdO LNANI 262558 OLX dAL TOAST ar ASSY YATIOHLNOO Aa SNOISIASY iagram D iring 6 Wi Figure 25 Manual Rev 721801 9113 Portable Furnace
4. indicate the new temperature setting while the upper display shows the actual temperature When scanning from one tem perature to another you will notice that the tempera ture controller seems to be ahead of the temperature of the equilibration block This is because the tem perature control sensor is near the outside of the block for rapid control response and it takes some time for the heat to conduct into the center Depend on your external temperature monitor to establish when the equilibration block has reached the desired tempera ture and achieved stability The actual temperature indication made by the tem perature controller is not intended to be a calibration reference but to merely provide a general indication of the furnace temperature NIST traceable standard thermometers are available and should be used in 18 Manual Rev 721801 making comparison measurements For less stringent measurements you may make a calibration of the controller and control probe at particular temperature points and use that with reasonable accuracy for a time WARNING Take care that all sensors used as references or being calibrated in the furnace are capable of withstanding the desired temperature range to be used For best results all reference or sample probes should be inserted into the full depth of the well At this position the stability is the highest and the gradi ents are the lowest Hart Scientific recommends that each user sa
5. process value temperature SL setpoint OP output power proportional band Tl integration time TD derivative time CH Cycle time To set a parameter simply type in the parameter and the value Example SL 800 This sets the control temperature to 800 C Instrument 2 RxD e RS 232 Cable Wiring for IBM PC and Compatibles Connector Connector DB 9 Pin DB 25 Pin 1NC e Computer DTE TxD 3 TxD e RxD GND 7 RTS e 8 CTS 9 NC Instrument Connector 2 3 4 NC 4 RTS 5 GNDe 5 CTS 6 NC 6 7 8 2 Computer DB 9 DB 9 1NC 1 NC 2 RxD 2 RxD 3 TxD 43 TxD 4 NC 7 4 NC 5 GND 5 GND 6 NC Le 6 NC 7 RTS 47 RTS 8 CTS 8 CTS 9NC 9 Figure 5 Serial Communications Wiring Diagram 20 Manual Rev 721801 Hart Scientific Test Probe Calibration 9 Test Probe Calibration For optimum accuracy and stability allow the calibra tor to warm up for 10 minutes after power up and then allow adequate stabilization time after reaching the set point temperature After completing calibration allow the block to cool before switching the power off After the power is turned off the fan continues to run and the Fan Light Indicator stays on until the unit is safely cooled 9 1 Calibration Methods 9 1 1 Direct Calibration
6. relative humidity 15 50 e pressure 75kPa 106kPa e mains voltage within 10 of nominal e vibrations in the calibration environment should be minimized mum durability and trouble free operation it must be altitude does not effect the performance or handled with care The instrument should not be safety of the unit operated in an excessively dusty or dirty environment Maintenance and cleaning recommendations can be found in the Maintenance Section of this manual 2 3 Warranty The instrument operates safely under the following conditions Table 1 Specifications The 9113 calibration furnace is covered by a 1 year warranty that takes effect 10 days after the product is Operating Range 200 C to 1100 C Stability t0 75 C Test Well 1 3 Dia X 10 5 Deep Available inserts size the well for best thermal contact with the probe Inserts Special high temperature alloy Standard inserts include a reference and atest hole One insert is included with the 9113 with 1 hole for 0 25 dia probes and one for 0 28 dia standard Additional custom drilled inserts are available with holes sizes starting at 3 16 probe size fit Insert block dimension is 1 25 dia X 6 long Interface Optional RS 232 serial interface for computer controlled operation Cooling Built in fan keeps enclosure cool and assists cool down after high temperatue use Size 175HX13 WX7 D Weight 22 Ib Manual Rev 7
7. the heaters will shut off The OP2 and are not functional in this unit 6 1 1 1 Temperature Adjustment Up Down Keys See Figure 2 The up and down arrow keys are used to increase and decrease the set temperature select Covers Tubes Cooling Vents Probe Cooling Furnace Core Opening Temperature Power Coniroller Switch Fan Light Handles Figure 1 Top Panel 9113 Portable Furnace Manual Rev 721801 13 Parts and Controls Sensor Failure Indicator Actual Temperature Set Temperature Heater Indicator Attachment Screw Parameter Button Temperature Function Adjustment Figure 2 Temperature Controller enlarged view between C and F and other functions A quick single stroke will increment or decrement the temperature setting Holding the buttons down causes a gradual acceleration of the temperature setting When these buttons are used to adjust other functions or parame ters they are used in conjunction with the button 6 1 2 Power Switch The power switch is located on the right side of the furnace just under the temperature controller The bottom is pressed inward revealing the bright reddish colored portion indicating the switch is actuated on Note that the internal fan is wired ahead of the power switch so that it will stay on until the fan thermostat determines that the unit is cooled even though the main pow
8. 21801 Hart Scientific shipped This warranty excludes breakage of the quartz tube The manufacturer will provide parts and labor without charge for repair or replacement of the instrument due to defects in material or workmanship The warranty will not apply if the product has not been used according to the instruction manual or has been 9113 Portable Furnace Manual Rev 721801 9 Specifications and Environmental Conditions tampered with by the user For service or assistance please contact the manufacturer Hart Scientific Inc 799 East Utah Valley Drive American Fork UT 84003 Phone 801 763 1600 Fax 801 763 1010 Internet http Awww hartscientific com Safety Guidelines 3 Safety Guidelines e Operate the instrument in room temperatures e Use only a grounded AC mains supply of the 10 between 5 50 C 41 122 F Allow sufficient air circulation by leaving at least 6 inches of space between the furnace and nearby ob jects Overhead clearance needs to allow for safe and easy insertion and removal of probes for calibration If the furnace is equipped with cooling coils use cold water circulation when the furnace is used above 600 C The furnace is a precision instrument Al though it has been designed for optimum du rability and trouble free operation it must be handled with care The instrument should not be operated in wet oily dusty or dirty environ ments It is important to keep the well of the instr
9. 3 Serial No Model No HART SCIENTIFIC Made in USA Model 9113 115 50 60 Hz 850 Watts Fuse 10 Amp 250 V F Figure 4 Back Panel 9113 Portable Furnace Manual Rev 721801 General Operation 7 General Operation 7 1 Overview The model 9113 is a temperature controlled furnace utilizing a full PID micro processor based temperature controller with a type K thermocouple temperature sensor The temperature controller sends a time pro portional signal to the solid state relay triac which regulates the current to the heater The object of temperature control is the equilibration block with test wells containing the reference probe and the test sensor to be calibrated inside This block provides a thermal mass which tends to stabilize the temperature and reduce the gradients between the test wells The furnace cabinet contains ventilation holes as well as a fan controlled by a thermostat This cooling capabil ity prevents the surface of the enclosure from getting hot In the event that the fans should fail a second thermostat is installed in the cabinet which will shut down the furnace heaters if the cabinet exceeds a safe temperature 7 2 Operating the Temperature Controller Operating the model 9113 is straight forward once you have grasped all the basic principles Temperature selection accomplished by using the up and down arrow keys on the front of the temperature controller The lower display will
10. Model 9113 Portable Furnace User Manual HART SCIENTIFIC Rev 721801 Copyright 1991 All rights reserved Hart Scientific 799 E Utah Valley Drive American Fork Utah 84003 9775 Telephone 801 763 1600 Fax 801 763 1010 Internet http www hartscientific com WARNING To ensure the safety of operating personnel and to avoid damage to this equipment DO NOT operate this unit without a properly grounded properly polarized power cord DO NOT connect this unit to a non grounded non polarized outlet DO USE a ground fault interrupt device WARNING HIGH VOLTAGE is used in the operation of this equipment SEVERE INJURY OR DEATH may result if personnel fail to observe safety precautions Before working inside the equipment turn power off and disconnect power cord WARNING HIGH TEMPERATURES PRESENT in this equipment FIRES AND SEVERE BURNS may result if personnel fail to observe safety precautions WARNING To ensure the safety of personnel and to avoid damage to equipment DO NOT use this unit for any application other than calibration work DO NOT use this unit in environments other than those listed in the user s manual Continuous use of this equipment at high temperatures for extended periods of time requires caution Completely unattended high temperature operation is not recommended for safety reasons Components and heater lifetimes can be shortened by continuous high temp
11. at the manufacturer Hart Scientific Inc manufacturers location American Fork Utah 84003 USA and model number data specific to this unit are provided Refer to the Model and Serial numbers whenever service is required 6 3 1 Power Cable The furnace is provided with a 16 gauge two conduc tor with ground molded cordset The cordset is remov able for convenience in moving the unit 6 3 2 Fuse The fuses used are 10 amp fuses They protect the system 115 VAC power and are easily accessed from the rear of the furnace If the furnace fails to operate check these first 6 3 3 RS 232 Port Optional An RS 232 serial port is available as an option for computer control of the furnace It is located on the rear panel of the unit as shown See Digital Commu nications Interface Secfion 8 Manual Rev 721801 15 Parts and Controls TEST WELLS Test Probe Reference Thermometer Top View of Equilibration Block Removal Tool Hole 1 4 20 Thread Eee Quartz Tube Ceramic Fiber Insulation Probe Holes Equilibration Block Thermocouple Type K Cutout Probe Thermocouple Type K Control Probe Embeded Radient Heating Coils Ceramic Fiber Insulation Figure 3 Equilibration Block Assembly 16 Manual Rev 721801 Hart Scientific Parts and Controls SYSTEM SCIENTIFIC Utah 8400
12. d Before initial use after transport and any time the instrument has not been energized for more than 10 days the instrument will need to be energized for a dry out period of 1 2 hours before it can be assumed to meet all of the safety requirements of the IEC 1010 1 12 Manual Rev 721801 5 4 Equilibration Block Installation After the furnace has generally been installed the equilibration block may be inserted Carefully insert the block into the quartz tube See Figure page 13 Extreme care should be taken installing the Equili bration Block since itis very heavy and the guartz tube is very fragile Care must be taken to prevent dirt insulation or other foreign materials from getting be tween the block and the guartz tube or it might break during heat up due to thermal expansion differences The fit between the block and the tube is typically loose in order to accommodate this expansion A handle is provided to insert the block It consists of a stainless steel rod with a 1 4 20 threaded end which is screwed into the top of the block The block is then lowered down over the control and cut out sensors using the handle and allowed to rest on the ceramic fiber insulation on the bottom of the well You will notice that there are grooves on either side of the block for the sensors to slide into The grooves have a tapered opening at the bottom to facilitate entry of the sensors WARNING When the furnace must be
13. e It is best if both the reference probe and the probe under test are the same size and construction Using probes with different lengths diameters and materials results in different stem effects causing an unknown temperature difference All furnaces have horizontal and vertical gradients that change with temperature This is an unknown variable which can be factored out if probes are the same type length diameter and material Probes should be inserted to the same depth in the well The following procedure can be used to calibrate a probe against a reference while eliminating error due to temperature gradients between wells e Place the reference probe in one well e Place the probe to be calibrated the unit under test UUT in another well e With the reference inserted into one well and the probe under test inserted into a second well make measurements of each e Swap the locations of the reference probe and probe under test Allow plenty of time for ther mal settling e Make another set of measurements of the reference probe and the probe under test e Average the two measurements of the refer ence probe Average the two measurements of the probe under test Averaging the two meas urements in this way eliminates error due to temperature gradients between the two wells e You may now compare the averaged measure ment of the probe under test with the averaged measurement of the reference probe e For best re
14. e pends on the conditions and temperatures involved Typically the furnace stabilizes to 0 75 C within 10 minutes of reaching the set point temperature as indicated by the display Ultimate stability is achieved 20 to 30 minutes after reaching the set temperature Inserting a cold probe into a well requires another period of stabilization depending on the magnitude of the disturbance and the required accuracy For exam ple inserting a inch diameter probe at room tem perature into a block at 300 C takes approximately 5 minutes to be within 0 75 C of its set point and takes 10 minutes to achieve maximum stability Decreasing the time required for the calibration proc ess can be accomplished by knowing how soon to make the measurement It is recommended that typi cal measurements be made at the desired tempera tures with the desired test probes to establish these times Hart Scientific 10 Maintenance The calibration instrument has been designed with the utmost care Ease of operation and simplicity of maintenance have been a central theme in the prod uct development Therefore with proper care the in strument should require very little maintenance Avoid operating the instrument in an oily wet dirty or dusty environment 9113 Portable Furnace If the outside of the instrument becomes soiled it may be wiped clean with a damp cloth and mild detergent Do not use harsh chemi cals on the surface which may damage th
15. e paint Be sure that the well of the furnace is kept clean and clear of any foreign matter Do not use fluids to clean out the well If a hazardous material is spilt on or inside the equipment the user is responsible for taking the appropriate decontamination steps as out lined by the national safety council with respect to the material Maintenance e If the mains supply cord becomes damaged replace it with a cord with the appropriate gauge wire for the current of the instrument If there are any questions call Hart Scientific Customer Service for more information Before using any cleaning or decontamination method except those recommended by Hart users should check with Hart Scientific Cus tomer Service to be sure that the proposed method will not damage the equipment If the instrument is used in a manner not in accordance with the equipment design the operation of the furnace may be impaired or safety hazards may arise WARNING This unit contains ceramic fiber components Service personnel coming into contact with these materials should take proper precautions when handling them Manual Rev 721801 23 Trouble Shooting 11 Trouble Shooting If problems arise while operating the 9113 this sec tion provides some suggestions that may help you solve the problem A wiring diagram is also included Opening the unit without contacting Hart Scientific Customer Service may void the warranty The controll
16. e esa aa ae ala 13 6 1 1 1 Temperature Adjustment Up Down Keys 13 6 2 Power Switch as te be ce eee ee ehh AA 0 14 61 3 Fan Light Indicator eo ee oe 14 6 1 4 Probe Cooling Tubes 14 6 1 5 2 5 2 amp ena sepa le ba Ra Aa Bee 14 6 1 6 Cooling Vents One ee a te 15 6 2 Eguilibration Block 15 6 2 1 Temperature Control and Cut out Sensors 1 15 6 3 Back Panel vet dt tet pan ka ten ie pee 15 6 3 1 Power Gables gx eee ee eee 15 6 3 2 BLU Dayle 15 6 3 3 RS 232 Port Optional 15 General 18 Tl y sas Ee ats Sean fash Dah tata aa Pan KN 18 7 2 Operating the Temperature Controller 18 7 2 1 Over Temperature 19 8 Digital Communications Interface optional 20
17. er may have been turned off This way the outer surfaces of the enclosure will not be heated to dangerous levels from stored heat The fan does not come on until the internal temperature rises ade quately to actuate the thermostat 14 Manual Rev 721801 6 1 3 Fan Light Indicator The fan light indicator comes on when the fan thermo stat reaches about 40 C inside the chassis and actu ates This light will stay on as a reminder to leave the power connected until the unit has sufficiently cooled 6 1 4 Probe Cooling Tubes Two probe cooling tubes are built into the model 9113 furnace They have the capacity of cooling up to two 3 8 inch diameter probes with out any danger to the furnace facility or other equipment in the area Avoid laying hot probes on surfaces which are flammable or may be damaged by high heat 6 1 5 Handles Handles are provided on each end of the furnace to allow transport of the unit as needed Remove the equilibration block before moving any distance as a precaution against breakage Hart Scientific 6 1 6 Cooling Vents The cooling vents in the top and in the front and rear covers provide inlets for air to circulate through the chassis and keep it cool The air is expelled through the rear of the chassis at the fan exit 6 2 Equilibration Block Assembly See Figure 3 The equilibration block is intended to stabilize the temperature fluctuations and to conduct heat be tween the test wells i
18. erature operation Follow all safety guidelines listed in the user s manual WARNING THIS EQUIPMENT SHOULD ONLY BE USED BY TRAINED PERSONNEL Table of Contents 555555555 EK KE EK 7 Specifications and Environmental Conditions 8 2 5 Nee ve de God Ne 8 2 2 Environmental Conditions 8 229 Warranty s i Ba Dae SBE Be OS ee eS 8 Safety GuIdGIINGS wae ee x 10 Quick 11 UNPACKING 11 4 2 ob ee ols 11 Aso POWER ip alot Ge ae an D ated 11 12 ST Location e a 12 HOW Clee dn IE at Sat AT ign 12 Bad gees vee 12 5 4 Eguilibration Block Installation 12 Parts and Controls 13 Top Panel ai sem we RRS ee 13 6 1 1 Temperature Controller aa cs A c
19. ers without RS 232 capabilities are shipped with the calibration parameters locked Therefore the user does not have access to these parameters We do not recommend that the user unlock these parameters without contacting Hart Sci entific Customer Service 111 Troubleshooting No Power no display on controller e Check that the power cord is plugged in e Check that the power cord is seated securely in socket on rear of the unit e Check the system fuses They may be blown Unit does not heat correctly e Possible triac or relay problems Contact Hart Scientific Customer Service Display shows extremely high temperatures even when unit is cool If the calibration parameters in the controller are unlocked the type of thermocouple could 24 Manual Rev 721801 be wrong Check to see that the controller is set for a Type K thermocouple e The Type K thermocouple may be discon nected or damaged Contact Hart Scientific Customer Service Unit heats but does not achieve set point and an audible click or chatter is heard The electric cut out board is either damaged or out of calibration Contact Hart Scientific Cus tomer Service e The nominal voltage is less than 100 VAC Check the voltage at the wall socket If this is a brown out turn the unit off until the power is restored If the voltage is continuously less than 100 VAC check with the local utility com pany If the unit was ordered specifically f
20. l 9113 Portable Calibration Furnace was designed specifically for calibrating PRT s fiber optic sensors and thermocouples at the higher temperature ranges up to 1100 C The furnace utilizes an equili bration block capable of making comparison meas urements Temperature stability is better than 0 75 C throughout the range and the gradient between wells at full insertion is less than 1 0 C 0 25 C The temperature control system utilizes a digital con troller with a type K thermocouple control sensor An RS 232 interface is optional The controller displays 9113 Portable Furnace Introduction the set temperature and the actual temperature simul taneously The displays show temperature to the near est degree in C or F normally shipped C may be changed to F The temperature is set with con venient up and down buttons on the front panel The furnace is protected from excessive temperature with an over temperature cut out The cut out is relay operated and independent from the temperature con troller to protect against the possibility of thermal runaway due to a shorted solid state relay which controls the heater Manual Rev 721801 7 Specifications and Environmental Conditions 2 Specifications and Environmental Conditions 2 1 Specifications See Tqble 2 2 Environmental Conditions Although the instrument has been designed for opti e temperature range 5 509 41 122 F e ambient
21. moved for any rea son remove the block assembly to prevent breakage of the quartz tube Hart Scientific Parts and Controls 6 Parts and Controls 6 1 Top Panel See Figure T The heater is made of a fiber ceramic insulating material with the heating element imbedded The heater is cylindrical in shape and is enclosed in an aluminum case with additional ceramic fiber insulation surrounding it The heater provides about 850 watts of heating power The heater is primarily a radiating device and is rated for a maximum furnace operating temperature of 1100 C Realize however that the higher the operating temperature the lower the lifetime of any high temperature heater Limiting the number of hours at the extreme high end of the temperature range to only the time required for calibrations will increase the longevity of your furnace heating ele ment 6 1 1 Temperature Controller The temperature controller see Figure 2 for detail is a full PID micro processor based instrument as indi cated It is set to cover the range of O to 1100 It features two LED type displays The upper display normally indicates the actual temperature while the lower display indicates the set temperature The dis plays are also utilized in setup and alarm functions Other indicators include the OP1 2 indicator lights The OP1 indicator lights when the heater is on The M indicator flashes if the sensor fails If the sensor opens
22. n order to equalize them The whole assembly is supported by a quartz tube and fiber ceramic insulation Two grooves along the sides of the block provide contact with the control thermo couple and the over temperature cut out thermocou ple All heated materials are quartz ceramic fiber or INCONEL alloy 600 or other related high oxidation resistant metals The top view of the block reveals 3 holes the test probe hole the reference thermometer hole and the removal tool hole The standard equilibration block is sized for 25 and 28 inch diameter probes however custom options are possible The block removal tool hole is a 1 4 20 threaded hole to allow a similarly threaded tool to be inserted for the ease of insertion and removal of the block 6 2 1 Temperature Control and Cut out Sensors The temperature control sensor is a type K as indi cated It is grounded to the INCONEL sheath The probe is normally inserted as shown in Figure 5 in a slot along the thermal equilibration block as indicated 9113 Portable Furnace Parts and Controls The cut out sensor is the same as the control sensor It is inserted along the groove on the opposite side from the control thermocouple It helps prevent the heater elements from overheating thus prolonging their life 6 3 Back Panel See Fige 4 The nomenclature on the rear panel of the furnace provides important information to the user in case service is required Note th
23. nnection The display begins to show the well temperature and the well heater starts operating to bring the tempera ture of the well to the set point temperature 4 3 Power Plug the furnace power cord into a mains outlet of the proper voltage frequency and current capability Typi cally this outlet is 115 VAC 10 50 60 Hz or 230 VAC 410 50 60 Hz Turn the furnace on using the front panel on off switch The furnace turns on and begins to heat to the previously programmed tem perature set point The front panel LED display indi cates the actual furnace temperature Manual Rev 721801 11 Installation 5 Installation 5 1 Location The furnace is intended to be used in any environment which is clean safe and reasonably free from drafts The best results from the furnace will be realized if the temperature fluctuations in the room are not exces sive A minimum of 6 inches free air space around the furnace must be allowed This will allow air exchange to safely remove excess heat from the furnace DANGER This furnace is intended for high temperature use and consequently a fire danger exists Keep away from flammable materials and keep fire ex tinguishing equipment near by 5 2 Power The furnace s nominal voltage is 115 VAC 10 8 amps single phase 50 60 Hz A six foot 16 AWG 2 conductor with ground removable power cord is pro vided Be sure an adequate ground is provided 5 3 Dry out Perio
24. or a nominal voltage of 100 VAC or less Japan Hart has compensated for this before shipping the furnace Unit heats but does not achieve set point and the display shows alarm messages e Hi alarm and or D alarm parameters in the controller are not set properly or the thermo couple may be damaged Contact Hart Scien tific Customer Service to check all parameters in the controller The controllers without RS 232 capabilities are shipped with the calibra tion parameters locked Therefore the user does not have access to these parameters Hart Scientific Trouble Shooting iring 11 2 W avos 3Sv3134 208 1209 8 Y33NI9NI ON SMG WOS4 3215 6116 A NOEZ 3SNJ dNVS 3SNJ 01 Z ALON SV NOLLYINSNI 0340709 1 IV L SALON 96 62 1 0091 69 108 ava 9 26 0078 2141139198 HVLN WHOS NYOIHANY
25. rating range The driven by the temperature controller fails causing cut out is factory set to about 1125 C The cut out thermal runaway 9113 Portable Furnace Manual Rev 721801 19 Digital Communications Interface optional 8 Digital Communications Interface optional If supplied with the option the 9113 furnace is capable of being controlled by other equipment through the digital interface 8 1 Wiring The serial communications cable attaches to the fur nace through the DB 9 connector at the back of the instrument Figure 5 Shows the pin out of the connec tor and suggested cable wiring To eliminate noise the serial cable should be shielded with low resistance between the connector DB 9 and the shield 8 2 Example First make the appropriate cable assembly for your computer system Connect the appropriate connec tors to your computer and to the furnace Load GWBASIC Then load the program TC847 BAS Run the program Set the Baud Rate on the Controller of the 9113 to 9600 Next set the address of your fur nace it must be 10 or greater Now you can set the temperature or if needed the furnace parameters A listing of the parameters and their meaning are in the following table The program supplied is demo program and may be altered by you for your specific needs For details of controller operation see the controller manual supplied The controller manual is supplied only with the RS 232 option PV
26. sults repeat the test several times at the same temperature and at different tem peratures This method can be used with different types of probes but the user must determine the uncertainty of the measurement Manual Rev 721801 21 Test Probe Calibration 9 1 3 Calibration of Multiple Probes Fully loading the calibrator with probes increases the time required for the temperature to stabilize after inserting the probes Be sure that the temperature has stabilized before starting the calibration Multiple probes may be calibrated simultaneously using either the direct or comparison calibration method Stem effect causes less error in the compari son calibration method than with the direct calibration method 9 2 Furnace Characteristics Understanding the thermal characteristics of the fur nace calibrator can help you achieve the best accu racy and efficiency possible 9 2 1 Vertical Gradient There is a temperature gradient vertically in the test well The heater has been applied to the block in such a way as to compensate for nominal heat losses out of the top of the furnace and minimize vertical tem perature gradients However actual heat losses vary 22 Manual Rev 721801 depending on the number and types of probes in serted into the calibrator and the block temperature For best results insert probes the full depth of well 9 2 2 Stabilization and Accuracy The stabilization time of the furnace calibrator d
27. tisfy themselves as to what the uncer tainties are in terms of stability and gradients between the test wells Variations in equipment probe size and configuration etc will have effects on these important factors A solid unstirred mass such as in a furnace is subject to heat losses from the probe stem which varies from probe to probe and temperature to tem perature Typically stabilities are better than 0 75 C For calibrations that must be less than full insertion into the test well make your own comparisons be tween the reference and test cell at that depth to establish the uncertainties The furnace can be used throughout the temperature range of 100 to 1100 C Lower temperatures are sluggish however High integrating values are re quired to maintain controller stability 1200 sec at the lower temperatures WARNING Take extreme care in handling hot probes The extreme temperatures generated in a furnace of this type can cause serious personal injury Do not touch them on external surfaces of the fur nace or set them on any other surfaces unable to withstand those temperatures A fire hazard exists Hart Scientific General Operation 7 2 1 Over Temperature Cut out controls a relay which is wired in series with the heater circuit The cut out is provided as a safety backup in The over temperature cut out protects the furnace case the temperature controller or the triac circuit from exceeding its own safe ope
28. ument Wait until the power has stabi lized before re energizing the furnace Hart Scientific 4 Quick Start 4 1 Unpacking Unpack the furnace carefully and inspect it for any damage that may have occurred during shipment If there is shipping damage notify the carrier immedi ately Verify that the following components are present e 9113 Furnace e Model 3189 Equilibration Block Assembly e Equilibration Block Assembly Removal Tool e Power Cord e Manual The equilibration block assembly is packed separately in order to protect the quartz tube from breakage during shipment The equilibration block assembly should not be installed into the furnace until it has been placed in location 4 2 Set up Place the furnace on a flat surface with at least 6 inches of free space around the instrument Plug the power cord into a grounded mains outlet Observe that 9113 Portable Furnace Quick Start the nominal voltage corresponds to that indicated on the back of the furnace Carefully insert the equilibration block into the well using the removal tool to lower the block in place The well must be clear of any foreign objects dirt and grit before the equilibration block is inserted Turn on the power to the furnace by toggling the power switch on The controller display should illuminate after 3 seconds After a brief self test the controller should begin normal operation If the unit fails to operate please check the power co
29. ument free of any foreign matter Do not operate near flammable materials Do not use fluids to clean out the well The furnace generates extreme temperatures Precautions must be taken to prevent personal injury or damage to objects Probes may be extremely hot when removed from the furnace Cautiously handle probes to prevent personal injury Carefully place probes on a heat resis tant surface or rack until they are at room temperature Manual Rev 721801 appropriate voltage to power the instrument The furnace requires 8 amps at 115 VAC 1076 single phase 50160 Hz optional 230 VAC 10 Before initial use after transport and anytime the furnace has not been energized for more than 10 days the instrument needs to be en ergized for dry out period of 1 2 hours before it can be assumed to meet all of the safety requirements of the IEC 1010 1 The instrument is equipped with operator ac cessible fuses If a fuse blows it may be due to a power surge or failure of a component Replace the fuse once If the fuse blows a second time it is likely caused by failure of a component part If this occurs contact Hart Scientific Customer Service Always replace the fuse with one of the same rating voltage and type Never replace the fuse with one of a higher current rating If a mains supply power fluctuation occurs immediately turn off the furnace Power bumps from brown outs and black outs can damage the instr
Download Pdf Manuals
Related Search