Home

Micro-Bath User`s Guide

Contents

1. Hart Scientific e 7103 Micro Bath User s Guide Revision 831301 EN Limited Warranty amp Limitation of Liability Each product from Fluke s Hart Scientific Division Hart is warranted to be free from defects in material and workmanship under normal use and service The warranty period is one year for the Micro Bath The warranty period begins on the date of the shipment Parts product repairs and services 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 Micro 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 reserves the right to invoice Buyer for impo
2. between the connector DB 9 and the shield enc 6 DSR iT A 0 gt 7RTS 7 RTS If the unit is used in a heavy industrial setting cs De the serial cable must be limited to ONE onc onc METER in length Instrument Computer DTE Setup DB 9 Pin 08 25 Pin Before operation the serial interface must first EN UT be set up by programming the BAUD rate Sh see and other configuration parameters These anc 4RTS S s 5CTS parameters are programmed within the serial See x K 6DsR interface menu The serial interface parameters 7RTs apco menu is outlined in Figure 7 on page 32 GER See Figure 8 Serial Cable Wiring To enter the serial parameter programming mode first press EXIT while pressing SET and release to enter the secondary menu Press SET repeatedly until the display reads P Ar Press UP until the serial interface menu is indicated with 5E c IRL 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 43 7103 Micro Bath User s Guide Serial Communications 44 10 1 2 1 10 1 2 2 10 1 2 3 10 1 2 4 10 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 Th
3. If the set point value is correct hold EXIT to resume displaying the well temperature Press UP or DOWN to adjust the set point value New set point value When the desired set point value is reached press SET to accept the new value and access the temperature scale units selection If EXIT is pressed instead of SET any changes made to the set point are ignored ser Accept new set point value Temperature Scale Units The temperature scale units of the controller can be set by the user to degrees Celsius C or Fahrenheit F The selected units are used in displaying the well temperature set point and proportional band Press SET after adjusting the set point value to change display units Scale units currently selected Press UP or DOWN to change the units 33 7103 Micro Bath User s Guide Scan 34 9 3 9 3 1 9 3 2 Uns F New units selected Scan The scan rate can be set and enabled so that when the set point is changed the bath heats or cools at a specified rate degrees per minute until it reaches the new set point With the scan disabled the bath heats or cools at the maximum possible rate Scan Control The scan is controlled with the scan on off function that appears in the main menu after the set point function Sc OFF Scan function off Sc 0n i Scan function on Press SET to accept the present setting and continue ser Accept scan setting
4. Scan Rate The next function in the main menu is the scan rate The scan rate can be set from 1 to 99 9 C min The maximum scan rate however is actually limited by the natural heating or cooling rate of the instrument This is often less than 100 C min especially when cooling The scan rate function appears in the main menu after the scan control function The scan rate units are in degrees C per minute Sr 10 0 Scan rate in C min Press SET to accept the new scan rate and continue ser Accept scan rate 9 4 9 4 1 9 4 2 Controller Operation Temperature Display Hold Temperature Display Hold The 7103 has a display hold function which allows action of an external switch to freeze the displayed temperature and stop the set point from scanning This is useful for testing thermal switches and cut outs The instrument must be powered off before attaching thermal switches or cut outs This section explains the functions available for operating the temperature hold feature An example follows showing how to set up and use the hold feature to test a switch Hold Temperature Display The hold feature is enabled by simply pressing the UP button when the temperature is displayed The hold temperature display shows the hold temperature on the right and the switch status on the left For the status c means the switch is closed and o means the switch is open The status flashes when the switch is in its active pos
5. R are the measured temperature and resistance at 25 C T and R are the measured temperature and resistance at 0 C T and R are the measured temperature and resistance at 65 C T and R are the meastured temperature and resistance at 125 C 12 2 2 Compute RO amp ALPHA T T a T delta EA h E T T d T dela i h ET R a Ra rzero 3 d a R R alpha 44 Ra delta is the new value of DELTA computed above 12 2 3 Compute BETA X ES 100 50 12 2 4 Calibration Procedure Calibration Procedure JI T00 beta R 1 t delta rzero alpha x y DEN y alpha x 3 Where t and r are the measured temperature and resistance at 25 C and alpha rzero and delta are the new values of R0 ALPHA and DELTA calculated above 1 Program the new values for DELTA delta RO rzero ALPHA alpha and BETA beta into the Micro Bath with the following steps 2 Display RO by pressing the SET and EXIT keys simultaneously Then press the UP key until CAL is displayed Press SET five times until RO is displayed 3 Press SET then use the UP or DOWN keys until the correct numerical setting is displayed Press SET to accept the new value 4 Repeat step 2 for ALPHA DELTA and BETA Accuracy amp Repeatability Check the accuracy of the instrument at various points over the calibrated range If th
6. an SC scan ON or OFF scan ON Set scan mode sc an on off sc on ON or OFF Read scan rate sr ate sr srat 99 9 C or F min srat 12 4C min Set scan rate sr ate n sr 1 1 1 to 99 9 Read hold ho ld ho hold open closed hold open 30 5 C 99 9 C or F Secondary Menu Read proportional band setting pr opband pr pb 999 9 pb 15 9 Set proportional band to n pr opband n pr 8 83 Depends on Configuration Read heater power po wer po po 999 9 po 1 0 duty cycle Configuration Menu Operating Parameters Menu Read stirrer motor speed moj tor mo mo 99 mo 15 Set stirrer motor speed to n mo tor n mo 16 0 to 40 Read high limit hl hl hl 999 hl 126 Set high limit hl n hl 90 0 126 Serial Interface Menu Read serial sample setting sa mple sa sa 9 sa 1 Set serial sampling setting ton sa mple n sa 0 0 to 999 seconds Set serial duplex mode du plex f ull h alf FULL or HALF Set serial duplex mode to full du plex f ull du f Set serial duplex mode to half du plex h alf du h Set serial linefeed mode Iffeed on of f ON or OFF Set serial linefeed mode to on Iffeed on Ifzon Set serial linefeed mode to off Iffeed of f lf of Calibration Menu Read RO calibration parameter r 0 r r0 999 999 r0 100 578 Set RO calibration parameter to n r 0 n r 100 324 90 to 110 Read ALPHA calibration al pha al al 9 9999999 al 0 0038573 parameter Set ALPHA calibration parameter al pha n al 0 0038433 002 to 005 ton Read DELTA calibration de lta de d
7. continuous high temperature operation If a mains supply power fluctuation occurs immediately turn off the bath Power bumps from brown outs and black outs can damage the instrument Wait until the power has stabilized before re energizing the bath Fluids may expand at different rates Allow for fluid expansion inside the well as the instrument heats Otherwise the fluid may overflow the well and leak into the instrument Authorized Service Centers Please contact one of the following authorized Service Centers to coordinate service on your Hart product Fluke Corporation Hart Scientific Division 799 E Utah Valley Drive American Fork UT 84003 9775 USA Phone 1 801 763 1600 Telefax 1 801 763 1010 E mail support hartscientific com 7103 Micro Bath User s Guide Authorized Service Centers Fluke Nederland B V Customer Support Services Science Park Eindhoven 5108 5692 EC Son NETHERLANDS Phone 31 402 675300 Telefax 3 1 402 675321 E mail ServiceDesk fluke nl Fluke Int Corporation Service Center Instrimpex Room 2301 Sciteck Tower 22 Jianguomenwai Dajie Chao Yang District Beijing 100004 PRC CHINA Phone 86 10 6 5 12 3436 Telefax 86 10 6 5 12 3437 E mail xingye han fluke com cn Fluke South East Asia Pte Ltd Fluke ASEAN Regional Office Service Center 60 Alexandra Terrace 03 16 The Comtech Lobby D 118502 SINGAPORE Phone 65 6799 5588 Telefax 65 6799 5589 E mail anthony ng
8. fluid to consider is the flash point The flash point is the temperature at which there is sufficient vapor given off so that when there is sufficient oxygen present and a ignition source is applied the vapor will ignite This does not necessarily mean that fire will be sustained at the flash point The flash point may be either of the open cup or closed cup type Either condition may occur in a bath situation The closed cup temperature is always the lower of the two The closed cup represents the contained vapors inside the tank and the open cup represents the vapors escaping the tank Oxygen and an ignition source will be less available inside the tank Environmentally hazardous fluids require special disposal according to applicable federal or local laws after use Cost Cost of bath fluids may vary greatly from cents per gallon for water to hundreds of dollars per gallon for synthetic oils Cost may be an important consideration when choosing a fluid Commonly Used Fluids Below is a description of some of the more commonly used fluids and their characteristics 23 7103 Micro Bath User s Guide Bath Fluid 24 8 3 10 1 8 3 10 2 8 3 10 3 8 3 11 Water Distilled Water is often used because of its very low cost availability and excellent temperature control characteristics Water has very low viscosity and good thermal conductivity and heat capacity which makes it among the best fluids for control stability at low te
9. instrument is COOL before closing the instrument for storage DO NOT mix water and oil when exceeding temperatures of 90 C 194 F DO NOT touch the well access surface of the unit The temperature of the well access is the same as the actual temperature shown on the display e g if the unit is set at 125 C and the display reads 125 C the well is at 125 C Ensure the power cord is positioned in such a way as it cannot contact hot surfaces or temperature probes Always inspect power cord before use for any damage to the insulation due to contact with hot surfaces cuts or abrasions The top sheet metal of the instrument may exhibit extreme temperatures for areas close to the well access DO NOT turn off the unit at temperatures higher than 100 C This could create a hazardous situation Select a set point less than 100 C and allow the unit to cool before turning it off DO NOT remove the fluid at high temperatures The fluid will be the same temperature as the display temperature DO NOT operate near flammable materials Extreme temperatures could ignite the flammable material Use of this instrument at HIGH TEMPERATURES for extended periods of time requires caution 7103 Micro Bath User s Guide Safety Information 1 2 2 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 a 115 VAC 10 or 230 VAC
10. is excessive Large amounts of heater power may be required because of the heat of vaporization Decomposition The temperature may reach a point at which decomposition of the fluid begins Further increasing the temperature may accelerate decomposition to the point of danger or impracticality Stirring Stirring of the bath fluid is very important for stable temperature control The fluid must be mixed well for good temperature uniformity and fast controller response The stirrer is adjusted for optimum performance Table 4 on page 27 shows nominal stirrer motor settings for several fluids If the stirrer does not function properly the instrument will oscillate and not meet published specifications Note If the bath is used with the probe basket removed stir motor settings need to be changed so that a small vortex can be seen in the liquid Warning Do not mix water and oil when exceeding temperatures of 90 C Table 4 Nominal Stirrer Motor Settings With Different Liquids Liquid Stir Motor Setting Temperature Distilled Water 12 5 C to 90 C 41 F to 194 F Ethylene Glycol 12 5 C to 90 C 25 F to 194 F 200 05 Oil 15 30 C to 125 C 22 F to 257 F 200 10 Oil 15 25 C to 125 C 77 F to 257 F 27 7103 Micro Bath User s Guide Power 28 8 5 8 6 8 7 8 8 Power Power to the bath is provided by an AC mains supply and passes through a filter to prevent switching spikes from being transmitted to othe
11. ring for the probes to fit into the probe basket Figure 3 Warning DO NOT use the instrument with an access cover installed that does not have a pressure relief hole 7103 Micro Bath User s Guide Accessories 73 3 Probe Basket A probe basket Figure 4 is provided as a guide for the probes and to prevent bumping of the stir bar Figure 4 Probe Basket 73 4 Stir Bar The stir bar Figure 5 sits in the bottom of the well for mixing the fluid providing better accuracy uniformity and stability o Figure 5 Stir Bar 20 8 1 8 2 8 3 8 3 1 General Operation Changing Display Units General Operation Changing Display Units The 7103 can display temperature in Celsius or Fahrenheit The temperature units are shipped from the factory set to Celsius To change to Fahrenheit or back to Celsius there are two ways 1 Press SET and UP simultaneously The display units are changed or 1 Press the SET key three times from the temperature display to show 2 Press the UP or DOWN key to change units 3 Press SET to store changes Switching to 230V Operation To use 230 V plug in the appropriate power cord into the unit The always show in the PEM fuse window Note Use 5 amp fuses for both 115 V and 230 V rt 29 sign should Bath Fluid Many fluids work with the 7103 bath Choosing a fluid requires consideration of many important characteristics of
12. the fluid Among these are temperature range viscosity specific heat thermal conductivity thermal expansion electrical resistivity fluid lifetime safety and cost Hart Scientific recommends using Silicone 200 05 Dow Oil If the viscosity becomes to great the stirrer may not function Temperature Range One of the most important characteristics to consider is the temperature range of the fluid Few fluids work well throughout the complete temperature range of the bath The temperature at which the bath is operated must always be within the safe and useful temperature range of the fluid The lower temperature range of the fluid is determined by the freeze point of the fluid or the temperature at which the viscosity becomes too great The upper temperature is usually limited by vaporization flammability or chemical breakdown of the fluid Vaporization of the fluid at higher temperatures may affect temperature stability because of cool condensed fluid dripping into the bath from the lid 21 7103 Micro Bath User s Guide Bath Fluid 22 8 3 2 8 3 3 8 3 4 8 3 5 8 3 6 Viscosity Viscosity is a measure of the thickness of a fluid how easily it can be poured and mixed Viscosity affects the temperature stability of the bath With low viscosity fluid mixing is better which creates a more uniform temperature throughout the bath This improves the bath response time which allows it to maintain a more constant temperature Fo
13. voltage frequency and current capability Refer to Section 3 1 Specifications for power details Turn the bath on using the rear panel POWER switch The Micro Bath will turn on and begin to heat to the previously programmed temperature set point The front panel LED display will indicate the actual bath temperature Setting the Temperature Section 9 2 explains in detail how to set the temperature set point on the calibrator using the front panel keys The procedure is summarized here 1 Press SET twice to access the set point value 2 Press UP or DOWN to change the set point value 3 Press SET to store the new set point 4 Press EXIT to return to the temperature display When the set point temperature is changed the controller switchs the well heater on or off to raise or lower the temperature The displayed well temperature gradually changes until it reaches the set point temperature The well may require 90 minutes to reach the set point depending on the span Another 10 to 15 minutes is required to stabilize within 0 04 C of the set point Ultimate stability may take 20 to 30 minutes more of stabilization time 5 1 5 2 5 3 Installation Bath Environment Installation Caution READ SECTION 6 ENTITLED BATH USE before placing the bath in service Incorrect handling can damage the bath and void the warranty Bath Environment The 7103 Micro Bath is a precision instrument which
14. 10 50 60 Hz only electric outlet as indicated on the back panel The power cord of the instrument is equipped with a three pronged grounding plug for your protection against electrical shock hazards It must be plugged directly into a properly grounded three prong receptacle The receptacle must be installed in accordance with local codes and ordinances or adapter plug DO NOT use an extension cord Consult a qualified electrician Always inspect the power cord before use for any damage to the insulation due to contact with hot surfaces cuts or abrasions The instrument is equipped with operator accessible 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 a Hart Scientific Authorized Service Center Always replace the fuse with one of the same rating voltage and type Never replace the fuse with one of a higher current rating Always replace the power cord with an approved cord of the correct rating and type If you have questions contact a Hart Scientific Authorized Service Center see Section 1 3 High voltage is used in the operation of this equipment Severe injury or death may result if personnel fail to observe the safety precautions A Cautions Always operate this instrument at room temperatures listed in Section 3 2 Environmental Conditions Allow sufficient a
15. 5 9 6 Switch Wiring The thermal switch or cut out is wired to the calibrator at the two terminals on the back of the Micro Bath labeled DISPLAY HOLD The switch wires may be connected to the terminals either way Internally the black terminal connects to ground The red terminal connects to 5V through a 100 kQ resistor The calibrator measures the voltage at the red terminal and interprets 5V as open and OV as closed Switch Test Example This section describes a possible application for the temperature hold feature and how the instrument is set up and operated Suppose you have a thermal switch which is supposed to open at about 75 C and close at about 50 C and you want to test the switch to see how accurate and repeatable it is You can use the temperature hold feature and the scan function to test the switch Measurements can be made by observing the display or preferably by collecting data using a computer connected to the RS 232 port To set up the test do the following steps 1 Connect the switch wires to the terminals on the back of the Micro Bath and place the switch in the well 2 Enable set point scanning by setting the scan to ON in the primary menu see Section 9 3 1 3 Set the scan rate to a low value say 1 0 C min see Section 9 3 2 If the scan rate is too high you may lose accuracy because of transient temperature gradients If the scan rate is too low the duration of the test may be longer than
16. CLUDING 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 competent jurisdiction such holding will not affect the validity or enforceability of any other provision Fluke Corporation Hart Scientific Division 799 E Utah Valley Drive e American Fork UT 84003 9775 USA Phone 1 801 763 1600 e Telefax 1 801 763 1010 E mail support hartscientific com www hartscientific com Subject to change without notice e Copyright 2007 e Printed in USA Table of Contents 1 Before YOU Start E 1 1 1 Symbols EE 1 1 2 Safety Information sssssssssssseeeeeeemenee mene 2 ECK WS Wee 2 T22 Werl EDI 4 1 3 Authorized Service Centers ssssssssssssssse ees 5 2 iie eiel RUM 7 3 Specifications and Environmental Conditions 9 E let UIDES E LEES 9 3 2 Environmental Conditions ssssssssessm ens 9 2 Quick SIdET uo esc een CURE Ge ERA PIG VPE DIFE SIRE M errr Vu KR MOM ERU VE 11 LM MESSIS nob c m 11 e fT 11 4 3 POWET EUH 12 4 4 Setting the Temperature sssssssssse eene 12 5 clie Seem rcr 13 51 Bath Envi
17. Corning 40 C v 133 C fl cc 133 C 5 25 C 0 92 25 C 04 0 00028 25 C 0 00105 1000 25 C 200 05 Silicone 10 150 C Oil Dow Corning 35 C v 165 C fl cc 165 C 10 25 C 0 934 25 C 0 43 e 40 C 0 00032 25 C 0 00108 1000 25 C 200 10 5012 3 135 C 0 45 100 C 50 150 C 0 482 200 C Dow Corning 7 C v 230 C fl cc 230 C 20 25 C 0 949 25 C 0 370 40 C 0 00034 25 C 0 00107 1000 25 C 200 20 5013 0 393 100 C 50 150 C 0 420 200 C Dow Corning 25 C v 280 C fl cc 280 C 50 25 C 0 96 25 C 04 0 00037 25 C 0 00104 1000 25 C 200 50 Silicone 50 150 C Oil Dow Corning 70 C v 232 C fl cc 232 C 50 70 C 107 25 C 0 358 40 C 0 00035 25 C 0 00075 100 25 C 550 300 C fl oc 10 104 C 0 386 100 C 1 150 C 5016 0 433 200 C Dow Corning 80 C v 302 C fl oc 302 C 50 80 C 111 25 C 0 363 40 C 0 00035 25 C 0 00077 100 25 C 710 7 204 C 0 454 100 C 1 150 C 5017 0 505 200 C Dow Corning 66 C v 315 C fl oc 315 C 50 66 C 0 96 25 C 0 34 100 C 0 0003 0 00095 100 25 C orm Silicone 14 204 C 1 150 C i Heat Transfer 145 C fr 530 C NONE 34 150 C 2 0 150 C 0 33 0 0014 0 00041 17 O cm Salt 5001 6 5 9 300 C 19 300 C 2 4 500 C 17 500 C Limiting Factors b boiling point e high evaporation fl flash point fr freeze point v viscosity Flash point test oc ope
18. ENE TS LI LI LLLI LL ET 41 9 8 3 eer elt 41 98391 Hard Ke E 42 9 8 3 2 9 8 3 3 9 8 3 4 9 8 3 5 10 Digital Communication Interface 43 10 1 Serial COMMUNICATIONS innt teen 43 pO MB Mm 43 10 12 em M T 43 1951 21 Baud E EE 44 1042 2 Sample Period i rect rte ter Et rnc ee ERE srt 44 10 1 2 3 Duplex Mode TOA 4A MEIMGTCC DEE 10 1 3 Serial Operation 10 2 Interface Commands ettet ee dee dee 45 11 Test Probe CalibrallOrn eo Eege 47 11 1 Calibrating a SingleJProbe cre te eee n reet 47 11 2 Stabilization amd Re E 47 12 Calibration Procedure seeeeeeeeeeeeeeeeee 49 12 1 Calibration POURS x ento eee D i E ete re Pe eee ert Die Cetus 49 vi 12 2 Calibration Procedu EE 49 1252 1 COMPUTE DELIA gentem e open tete tte dean laetae t ptt 49 12 2 2 Compute ROQ ALPHA TTT 50 1223 COMPUTE BETA seein oa detenti te te ete ud Lade Deeg 50 12 2 4 Accuracy amp Repeatability sings nec eet e etg od ere Re ERE TER 51 13 Maint n e Mem 53 14 TroubleshoolM il eoeeieciaual n d rre IER ARENA AnA uai amanda tas va rina ri 55 14 1 Troubleshooting Problems Possible Causes and Solutions 55 14 2 COMMEN S ebessi Eieren Eessen eebe eege 56 1421 EMG DIreGliVe ia erre iv estre tex d t E E ER RENE CER DRE ERG 56 14 2 2 Low Voltage Directive Gate 56 Tables Table 1 International Electrical S
19. Pollution Degree 2 per IEC1010 1 refers to CATII 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 TICK Australian EMC mark X 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 instrument being used A Warnings Disclaimer Hart Scientific manufactures instruments for the purpose of temperature calibration Instruments used for applications other than calibration are used at the discretion and sole responsibility of the customer Hart Scientific cannot accept any responsibility for the use of instruments for any application other than temperature calibration 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 unit may cause unknown hazards to the user DO NOT use the unit in environments other than those listed in the us
20. actory set values The correct setting of these parameters is important to the safety and proper operation of the bath The calibration parameters menu is indicated by Calibration parameters menu Press SET five times to enter the menu 41 7103 Micro Bath User s Guide Controller Configuration 42 9 8 3 1 9 8 3 2 9 8 3 3 9 8 3 4 9 8 3 5 The calibration parameters RO ALPHA DELTA and BETA characterize the resistance temperature relationship of the platinum control sensor These parameters may be adjusted by an experienced user to improve the accuracy of the calibrator Hard Cutout This parameter is the temperature above which the unit shuts down automatically The parameter is set at the factory to approximately 140 C and can be changed only through the variable resistor This parameter cannot be changed through the instrument menu or the communications port RO This probe parameter refers to the resistance of the control probe at 0 C The value of this parameter is set at the factory for best instrument accuracy ALPHA This probe parameter refers to the average sensitivity of the probe between 0 and 100 C The value of this parameter is set at the factory for best instrument accuracy DELTA This probe parameter characterizes the curvature of the resistance temperature relationship of the sensor The value of this parameter is set at the factory for best instrument accuracy BETA This probe pa
21. arameters in the menu are BAUD rate sample period duplex mode and linefeed Press UP to enter the menu Baud Rate The baud rate is the first parameter in the menu The baud rate setting determines the serial communications transmission rate The baud rate parameter is indicated by Flashes bAUd and then displays the setting oe 2400 b Current baud rate The baud rate of the serial communications may be programmed to 300 600 1200 2400 4800 or 9600 baud Use UP or DOWN to change the baud rate value 4800 b i New baud rate 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 serial interface parameter menu 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 the instrument transmits the current measurement over the serial interface approximately every five seconds The automatic sampling is disabled with a sample period of 0 The sample period is indicated by SPEr i Flashes SPEr and then displays the setting Gg SP 1 2 Current sample period seconds Adjust the value with UP or DOWN and then use SET to store the sample rate to the displayed value EXIT does not store the new value SP 60 i New sample period Duplex Mode T
22. bration Comparison calibration involves testing a probe unit under test UUT against a reference probe After inserting the probes to be calibrated into the bath allow sufficient time for the probes to settle and the temperature of the bath to stabilize One of the significant dividends of using a bath rather than a dry well to calibrate multiple probes is that the probes do not need to be identical in construction The fluid in the bath allows different types of probes to be calibrated at the same time However stem effect from different types of probes is not totally eliminated Even though all baths have horizontal and vertical gradients these gradients are minimized inside the bath work area Nevertheless probes should be inserted to the same depth in the bath liquid Be sure that all probes are inserted deep enough to prevent stem effect From research at Hart Scientific we suggest a general rule of thumb for immersion depth 7103 Micro Bath User s Guide Calibration of Multiple Probes 6 3 to reduce the stem effect to a minimum 15 x the diameter of the UUT the sensor length Do not submerge the probe handles If the probe handles get too warm during calibration at high temperatures a heat shield could be used just below the probe handle This heat shield could be as simple as aluminum foil slid over the probe before inserting it in the bath or as complicated as a specially designed reflective metal apparatus When calibrating ove
23. bration error will also be greater over the range If for instance 50 C to 150 C is chosen as the calibration range then the calibrator may achieve an accuracy of say 0 3 C over the range 50 to 150 C Choosing a range of 50 C to 90 C may allow the calibrator to have a better accuracy of maybe 0 2 C over that range but outside that range the accuracy may be only 1 5 C 12 2 Calibration Procedure 1 Choose three set points to use in the calibration of the RO ALPHA DELTA and BETA parameters These set points are generally 25 C 0 C 65 C and 125 C but other set points may be used if desired or necessary 2 Setthe bath to the low set point When the bath reaches the set point and the display is stable wait 15 minutes or so and then take a reading from the ther mometer Sample the set point resistance by holding down the SET key and pressing the DOWN key Write these values down as T1 and R1 respectively 3 Repeat step 2 for the other two set points recording them as T R T R T and R respectively 4 Using the recorded data calculate new values for RO ALPHA DELTA and BETA parameters using the equations given below 12 2 1 Compute DELTA A 1 f B T T 49 7103 Micro Bath User s Guide Calibration Procedure SCH a FAL Tj Js ker T Measured temperature using thermometer R Value of R from display of 7103 Press SET and DOWN at the same time where T and
24. ccessed in the secondary menu Press SET and EXIT simultaneously and release The heater power will be displayed as a percentage of full power Heater power in percent To exit out of the secondary menu hold EXIT To continue on to the proportional band setting function press EXIT momentarily or SET Proportional Band In a proportional controller such as this the heater output power is proportional to the well temperature over a limited range of temperatures around the set point This range of temperature is called the proportional band At the bottom of the proportional band the heater output is 100 At the top of the proportional band the heater output is 0 Thus as the 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 fairly constant temperature The temperature stability of the well and response time depend on the width of the proportional band If the band is too wide the well temperature will deviate excessively from the set point due to varying external conditions This is because 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 temperature may swing back and forth because the controller overreacts to temperature variations For best control stability the proportiona
25. ctory Reset Sequence Factory Reset Sequence Hold the SET and EXIT buttons down at the same time while powering up the instrument The instrument displays shows n t the model number and the firmware version Each of the controller parameters and calibration constants must be reprogrammed The values can be found on the Report of Calibration that was shipped with the instrument The instrument heats or cools too quickly or too slowly Incorrect scan and scan rate settings The scan and scan rate settings may be set to unwanted values Check the Scan and Scan Rate settings The scan may be off if the unit seems to be responding too quickly The scan may be on with the Scan Rate set low if unit seems to be responding too slowly An o is displayed at the left of the display External switch is open The external switch is open causing the displayed temperature to be frozen and keeping the set point from scanning Turn the switch test off by pressing the DOWN button on the front panel The display shows any of the following Ere Il Ere 2 Err 3 Err H or Ere 5 Controller problem The error messages signify the following problems with the controller Err 1 a RAM error Err 2 a NVRAM error Erre 3 a Structure error Er c 4 an ADC setup error Err 5 an ADC ready error Initialize the system by performing the Factory Reset Sequence described above The display shows Defective control sen
26. d to store the parameter value Press EXIT briefly to skip a parameter without storing the parameter value Hold EXIT to exit the menu and display the temperature dl RES J Figure 7 Controller Operation Flowchart 32 EXIT Operating UP Parameters DOWN Menu Adj HL Stir Speed Adj Stir Speed d Feee NV a m T gt UD D gt sui Adjust Rate D gt e D ple iod Adj S Peri Du ke de o Adj Di bi o v o ge 9 ao UP DOWN DO NOT CHANGE THESE VALUES SEE MANUAL EX T Cal Menu ser X5 rd o ET 7D E TWANVW 33S S3fY1VA ASSHL 39NVHO LON OG Cut out D BIS gt 2 j R 0 gt H Adj B m LTA m HEHH HHH DUCI Adjust BETA 9 2 2 9 2 3 Controller Operation Temperature Set point i 186 060 Well temperature in degrees Celsius ser Access set point memory I 25 Set point memory 1 25 C currently used 4 125 New set point memory 4 125 C Press SET to accept the new selection and access the set point value il Accept selected set point memory Set point Value The set point value may be adjusted after selecting the set point memory and pressing SET 4 e5 i Set point 4 value in C
27. e 9 99999 de 1 507 parameter Set DELTA calibration parameter de lta n de 1 3742 0 3 0 Read BETA calibration parameter be ta be be 99 999 be 03427 Set BETA calibration parameter be ta n be 0 342 20 to 20 Functions not on menu Read firmware version number ver sion ver ver 9999 9 99 ver 7103 2 00 Read structure of all commands h elp h list of commands Read all operating parameters all all list of parameters Legend Note Optional Command data Returns either information n Numeric data supplied by user 9 Numeric data returned to user x Character data returned to user When DUPLEX is set to FULL and a command is sent to READ the command is returned followed by a carriage return and linefeed Then the value is returned as indicated in the RETURNED column 46 11 11 1 11 2 Test Probe Calibration Calibrating a Single Probe Test Probe Calibration Note This procedure is to be considered a general guideline Each laboratory should write their own procedure based on their equipment and their quality program Each procedure should be accompanied by an uncertainty analysis also based on the laboratory s equipment and environment For optimum accuracy and stability allow the calibrator to warm up for 25 minutes after power up and then allow adequate stabilization time after reaching the set point temperature After completing operation of the calibrator allow the well to cool by setting the temperatu
28. e baud rate of the 7103 serial communications may be programmed to 300 600 1200 2400 4800 or 9600 baud The baud rate is pre programmed to 2400 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 SPEr 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 the instrument transmits the current measurement over the serial interface approximately every five seconds The automatic sampling is disabled with a sample period of 0 Press SET to choose to set the sample period Adjust 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 mode may be set to half duplex HALF or full duplex FULL With full duplex any commands received by the thermometer 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 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 interfac
29. e instrument does not pass specification at all set points repeat the Calibration Procedure Maintenance 13 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 product development Therefore with proper care the instrument should require very little maintenance Avoid operating the instrument in an oily wet dirty or dusty environment If the outside of the instrument becomes soiled it may be wiped clean with a damp cloth and mild detergent Do not use harsh chemicals on the surface which may damage the paint It is important to keep the well of the calibrator clean and clear of any foreign matter DO NOT use chemicals to clean the well The bath should be handled with care Avoid knocking or dropping the instrument If a hazardous material is spilt on or inside the equipment the user is responsible for taking the appropriate decontamination steps as outlined by the national safety council with respect to the material 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 an Authorized Service Center for more information Before using any cleaning or decontamination method except those recommended by Hart users should check with an Authorized Service Center to be sure that the proposed method will not damage the
30. e menu is the linefeed mode This parameter enables On or disables OFF transmission of a linefeed character LF 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 controller will immediately begin transmitting temperature readings at the programmed rate The serial communications uses 8 data bits one stop bit and no parity The set point and other commands may be sent via the serial interface to set the temperature set point and view or program the various parameters The interface commands are discussed in Section 10 2 All commands are ASCH character strings terminated with a carriage return character CR ASCII 13 10 2 Digital Communication Interface Interface Commands Interface Commands The various commands for accessing the calibrator functions via the digital interfaces are listed in this section see Table 5 These commands are used with the RS 232 serial interface The commands are terminated with a carriage return character The interface makes no distinction between upper and lower case letters hence either may be used Commands may be abbreviated to the minimum number of letters which determines a unique command A command may be used to either set a parameter or display a parameter depending on whethe
31. equipment If the instrument is used in a manner not in accordance with the equipment design the operation of the Micro Bath may be impaired or safety hazards may arise 53 14 14 1 Troubleshooting Troubleshooting Problems Possible Causes and Solutions Troubleshooting This section contains information on troubleshooting and CE Comments Troubleshooting Problems Possible Causes and Solutions In the event that the instrument appears to function abnormally this section may help to find and solve the problem Several possible problem conditions are described along with likely causes and solutions If a problem arises please read this section carefully and attempt to understand and solve the problem If the problem cannot otherwise be solved contact an Authorized Service Center see Section 1 3 for assistance Be sure to have the model number and serial number of your instrument available Problem Possible Causes and Solutions Incorrect temperature reading Incorrect RO ALPHA and DELTA parameters Find the value for RO ALPHA and DELTA on the Report of Calibration that was shipped with the instrument Reprogram the parameters into the instrument see Section 9 8 3 Calibration Parameters Allow the instrument to stabilize and verify the accuracy of the temperature reading Controller locked up The controller may have locked up due to a power surge or other aberration Initialize the system by performing the Fa
32. er s guide Completely unattended operation in not recommended DO NOT install access cover without holes onto a bath that is energized Dangerous pressures may result from fluids vaporizing Follow all safety guidelines listed in the user s manual Before You Start Safety Information 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 or safety hazards may arise Inspect the instrument for damage before each use DO NOT use the instrument if it appears damaged or operates abnormally 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 61010 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 The instrument is intended for indoor use only Lift the instrument by the handle provided to move the instrument DO NOT move the instrument until the display reads less than 25 C 77 F and the unit has been drained or the Transport Lid installed BURN HAZARD ALWAYS ensure the
33. 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 Introduction Introduction The Hart Scientific 7103 Micro Bath may be used as a portable instrument or bench top temperature calibrator for calibrating thermocouple and RTD temperature probes The 7103 is small enough to use in the field and accurate enough to use in the lab With an ambient temperature of 23 C 74 F calibrations may be done over a range of 30 C to 125 C 22 F to 257 F The resolution of the 7103 temperature display is 0 01 degrees The Micro Bath calibrator features e Convenient handle e RS 232 interface e Switchable AC Input 115 VAC or 230 VAC Built in programmable features include e Temperature scan rate control e Temperature switch hold e Eight Set point memory e Adjustable readout in C or F The temperature is accurately controlled by Hart s hybrid analog digital controller The controller uses a precision platinum RTD as a sensor and controls the well temperature with thermal electric devices TED The LED front panel continuously shows the current well temperature The temperature may be easily set with the control buttons to any desired temperature within the specified range The calibrator s multiple fault protection devices insure user and instrument safety and protection The 7103 Micro Ba
34. g the control temperature is done directly in degrees of the current scale It can be set to one hundredth of a degree Celsius or Fahrenheit The functions of the buttons are as follows SET Used to display the next parameter in the menu and to store parameters to the displayed value DOWN Used to decrement the displayed value of parameters UP Used to increment the displayed value EXIT Used to exit from a function and to skip to the next function Any changes made to the displayed value are ignored Holding the EXIT button for approximately 0 5 seconds exits back to the main display 7103 MICRO BATH 30 C to 125 C Hart Scientific Figure 2 7103 Front Panel Parts and Controls Accessories 73 Accessories 73 1 Transport Pour Access Lid A transport pour access lid Figure 3 is provided so the fluid being used does not have to be removed when transporting The lid doubles as a pour spout Pour Spout Pour Spout Cover Transport Plug Transport Pour Access Lid Access Cover A Figure 3 Bath Lids and Lid Parts 73 2 Access Cover An access cover is available for optimum stability Holes should be drilled in the access cover to allow insertion of the probes into the well The holes must be within the guide
35. he next parameter is the duplex mode The duplex mode may be set to full duplex or half duplex With full duplex any commands received by the calibrator via the 9 8 2 4 9 8 3 AN Controller Operation Controller Configuration serial interface will be immediately echoed or transmitted back to the device of origin With half duplex the commands will be executed but not echoed The duplex mode parameter is indicated by dUPL i Flashes dUPL and then displays the setting Linefeed The final parameter in the serial interface menu is the linefeed mode This parameter 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 LF Flashes LF and then displays the setting Calibration Parameters The operator of the Micro Bath controller has access to the Hard Cut out and a number of the bath calibration constants namely RO ALPHA DELTA and BETA These values are set at the factory and should 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 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 manual Caution DO NOT change the values of the bath calibration constants from the f
36. iei cete recie re cr rue teet teet ette aur ADOUE INC ELE El Te EE eege ED 8 6 Thermal Electric Devices TED eene eben 87 UMS mm 8 8 Temperature Controller emen Controller Operation 1 nos pase oatesaiinsniunc scu auc rave vx cus cba garda ads 31 9 1 Well Temperature ace cessere ent enl n e tna rcr tat eit ena 31 9 2 Temperature Set point oo ee cece cette cette ee eee 31 SCT Programmable Set polhtS corni trace n Deer tod etai Dn pena 31 9 2 2 Setpoltb TEE 33 92 3 Temperature Scale UMIS secos eat ani Pasce tre DER i Ree Riad au nido 33 9 3 SCAN ontrola EE 34 9 3 2 Scart Rate eie cepe erattu ble ete nc euo d dug edet 34 9 4 Temperature Display Hold 5er net t cn 35 9 4 1 Hold Temperature DISplay rtp pe d e entente dae 35 9 42 Mode SOWING BEE 35 943 SWICK WIIG auos t praepo eegene d Ee Zeie 36 9 4 4 SWitchr Test EXample scite cian demas rne ERR LER Gn aen rte de raa eg 36 9 5 Secondary Men 36 9 6 Thermal Electric Device TED 36 9 7 Proportional Bard tette rere tee em deeg eege 37 9 8 Controller Contiouration emen 38 9 8 1 Operating Parameters coactam ree rate do enata le ER BN 38 erm S MM To DR REESE 39 9 98 1 25 Stir Speed EE 39 9 8 2 Serial Interface Parameters sssssssssssssss ee eee 39 82 1 Baud RAG ssec ect cepe pee ctia cries caca 40 9 8 225 Sampe le e e E 40 9829 Duplex Mode s iot exp ee n ed p RU M D at dd i te kaye eee 40 rotor MEMINI clo R
37. ir circulation by leaving at least 6 inches 15 cm of clearance around the instrument Overhead clearance is required DO NOT place this instrument under a cabinet or other structure Never introduce any foreign material into the well DO NOT change the values of the calibration constants from the factory set values The correct setting of these parameters is important to the safety and proper operation of the unit DO NOT slam the probe stems into the well This type of action can cause a shock to the sensor and affect the calibration DO use a ground fault interrupt device DO NOT operate this instrument in an excessively wet oily dusty or dirty environment 1 3 Before You Start Authorized Service Centers The unit is a precision instrument Although it has been designed for optimum durability and trouble free operation it must be handled with care Most probes have handle temperature limits Be sure that the probe handle temperature limit is not exceeded in the air above the instrument The instrument and any thermometer probes used with it are sensitive instruments that can be easily damaged Always handle these devices with care Do not allow them to be dropped struck stressed or overheated When calibrating PRTs always follow correct calibration procedure and calibrate from high temperatures to low temperatures with the appropriate triple point of water checks Components and heater lifetimes can be shortened by
38. irable in applications where constant liquid level is important Many fluids including oils have significant thermal expansion Electrical Resistivity Electrical resistivity describes how well the fluid insulates against the flow of electric current In some applications such as measuring the resistance of bare temperature sensors it may be important that little or no electrical leakage occur through the fluid In such conditions choose a fluid with very high resistivity 8 3 7 8 3 8 8 3 9 8 3 10 General Operation Bath Fluid Fluid Lifetime Many fluids degrade over time because of evaporation water absorption gelling or chemical breakdown Often the degradation becomes significant near the upper temperature limit of the fluid substantially reducing the fluid s lifetime Safety When choosing a fluid always consider the safety issues associated Obviously where there are conditions of extreme hot or cold there can be danger to people and equipment Fluids may also be hazardous for other reasons Some fluids may be considered toxic Contact with eyes skin or inhalation of vapors may cause injury A proper fume hood must be used if hazardous or bothersome vapors are produced Warning Fluids at high temperatures may pose danger from BURNS FIRE and TOXIC FUMES Use appropriate caution and safety equipment Fluids may be flammable and require special fire safety equipment and procedures An important characteristic of the
39. is necessary You may need to experiment to find the best scan rate 4 Set the first program set point to a value above the expected upper switch temperature say 90 C 5 Set the second program set point to a value below the expected lower switch temperature say 40 C in the program menu 6 Collect data on a computer connected to the RS 232 port Refer to Section 9 8 2 Serial Interface Parameters for instructions on configuring the RS 232 communications interface 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 7 on page 32 Thermal Electric Device TED The temperature controller controls the temperature of the well by pulsing the TED on and off The total power being applied to the TED is determined by the duty cycle or the ratio of TED on time to the pulse cycle time By knowing the amount of heating the user can tell if the calibrator is heating up to the set point cooling down or 9 7 Controller Operation Proportional Band controlling at a constant temperature Monitoring the percent heater power will let the user know how stable the well temperature is With good control stability the percent heating power should not fluctuate more than 5 within one minute The heater power display is a
40. ition opposite the normal position The hold temperature shows what the temperature of the well was when the switch changed from its normal position to its active position While the switch is in the normal position the hold temperature will follow the well temperature If the Scan Control is OFF and the Hold Temperature Display is being used the temperature at which the switch is activated does not affect the set point temperature However if the Scan Control is ON and the Hold Temperature Display is being used the temperature at which the switch is activated is stored as the new set point temperature Operation of the hold temperature display is outlined below bag 43 900 j Well temperature display e Access hold display c 144 8 i Switch status and hold temperature To return to the normal well temperature display press DOWN Mode Setting The Hold Function is always in the automatic mode In this mode the normal position Is set to whatever the switch position is when the set point is changed For example if the switch is currently open when the set point is changed the closed position then becomes the new active position The normal position will be set automatically under any of the following conditions 1 a new set point number is selected 2 the set point value is changed 3 a new set point is set through the communications channels 35 7103 Micro Bath User s Guide Secondary Menu 36 9 4 3 9 4 4 9
41. l band must be set for the optimum width 37 7103 Micro Bath User s Guide Controller Configuration 38 9 8 9 8 1 The proportional band width is set at the factory to about 5 0 C The proportional band width may be altered by the user if he desires to optimize the control characteristics for a particular application The proportional band width is easily adjusted from the front panel The width may be set to discrete values in degrees C or F depending on the selected units The proportional band adjustment is be accessed within the secondary menu Press SET and EXIT to enter the secondary menu and show the heater power Then press SET to access the proportional band ES Access heater power in secondary menu fe 0 P Heater power in percent ser Access proportional band ProP Flashes ProP and the setting 5 0 Proportional band setting To store the new setting press SET Press EXIT to continue without storing the new value ser Accept the new proportional band setting Controller Configuration The controller has a number of configuration and operating options and calibration parameters which are programmable via the front panel These are accessed from the secondary menu after the proportional band function by pressing SET Pressing SET again enters the first of three sets of configuration parameters operating parameters serial interface parameters and calibration parameters The menus are
42. ll Use an ohmmeter to the chassis check the continuity between the ground prong on the PEM and the chassis If the resistance reading is greater than three ohms there is a problem Check the power cord for continuity on the ground prongs If the resistance is greater than one ohm replace the power cord Comments EMC Directive Hart Scientifics equipment has been tested to meet the European Electromagnetic Compatibility Directive EMC Directive 89 336 EEC The Declaration of Conformity for your instrument lists the specific standards to which the unit was tested Low Voltage Directive Safety In order to comply with the European Low Voltage Directive 73 23 EEC Hart Scientific equipment has been designed to meet the EN 61010 1 and EN 61010 2 010 standards
43. mperature Controller Operation This chapter discusses in detail how to operate the bath temperature controller using the front control panel Using the front panel key switches and LED display the user may monitor the well temperature set the temperature set point in degrees C or F monitor the heater output power adjust the controller proportional band and program the calibration parameters operating parameters and serial interface configuration Operation of the functions and parameters are shown in the flowchart in Figure 7 on page 32 This chart may be copied for reference In the following discussion a button with the word SET UP EXIT or DOWN inside indicates the panel button while the dotted box indicates the display reading Explanation of the button or display reading are to the right of each button or display value Well Temperature The digital LED display on the front panel allows direct viewing of the actual well temperature This temperature value is what is normally shown on the display The units C or F of the temperature value are displayed at the right For example 00 00 Well temperature in degrees Celsius The temperature display function may be accessed from any other function by pressing the EXIT button Temperature Set point The temperature set point can be set to any value within the range and resolution as given in the specifications Be careful not to exceed the safe upper temperature limi
44. mperature scale is shown in degrees Celsius The fluids general range of application is indicated by the shaded bands Qualities including pour point freeze point important viscosity points flash point boiling point and others may be shown Freezing Point The freezing point of a fluid is an obvious limitation to stirring As the freezing point is approached high viscosity may also limit performance 8 4 General Operation Stirring Pour Point This represents a handling limit for the fluid Viscosity Points shown are at 50 and 10 centistokes viscosity When viscosity is greater than 50 centistokes stirring is very poor and the fluid is unsatisfactory for bath applications Optimum stirring generally occurs at 10 centistokes and below Fume Point A fume hood should be used This point is very subjective in nature and is impacted by individual tolerance to different fumes and smells how well the bath is covered the surface area of the fluid in the bath the size and ventilation of the facility where the bath is located and other conditions We assume the bath is well covered at this point This is also subject to company policy Flash Point The point at which ignition may occur The point shown may be either the open or closed cup flash point Refer to the flash point discussion in Section 8 3 8 Boiling Point At or near the boiling point of the fluid the temperature stability is difficult to maintain Fuming or evaporation
45. mperatures Temperature stability is much poorer at higher temperatures because water condenses on the lid cools and drips into the bath Water 1s safe and relatively inert The electrical conductivity of water may prevent its use in some applications Water has a limited temperature range from a few degrees above 0 C to a few degrees below 100 C At higher temperatures evaporation becomes significant Water used in the bath should be distilled or softened to prevent mineral deposits Consider using an algaecide chemical in the water to prevent contamination Mineral Oil Mineral oil or paraffin oil is often used at moderate temperatures above the range of water Mineral oil is relatively inexpensive At lower temperatures mineral oil is quite viscous and control may be poor At higher temperatures vapor emission becomes significant The vapors may be dangerous and use of a fume hood is highly recommended As with most oils mineral oil will expand as temperature increases so be careful not to fill the bath too full that it overflows when heated The viscosity and thermal characteristics of mineral oil is poorer than water so temperature stability will not be as good Mineral oil has very low electrical conductivity Use caution with mineral oil since it is flammable and may also cause serious injury if inhaled or ingested Silicone Oil Dow Corning 200 05 200 10 200 20 Silicone oils are available which offer a much wider operating temperatu
46. n cup cc closed cup Very low water solubility ice will form as a slush from condensation below freezing 25 7103 Micro Bath User s Guide Bath Fluid 100 C 0 C 100 C 200 C Silicone Oil 5017 Silicone Oil 5014 Silicone Oil 5013 Silicone Oil 5012 Silicone Oil 5010 HFE 7500 5023 Halocarbon 5019 Mineral Oil 5011 Water Methanol Ethanol Ethylene Glycol 50 50 with H20 5020 Dynalene HF LO 5022 Bath Salt 5001 300 C 400 C 500 C 600 C FL 232 C v UU FL 211 C FL 133 C m 9 fe cs FL 177 C i m D v FR Pure rLixc BP FL 16 C es FL 60 C GE O Decomposition Starts m Shaded area represents usable range of fluid starting at BP Boiling Point 50 centistokes Lighter shading represents decreasing cs Centistokes H viscosity while vaporization and decomposition increase EP Evaporation Point fluid loss due to evaporation FL Flash Point FR Freeze Point PP Pour Point Black area represents liquid range with excessive viscosity r o Q o 3 a Range over which a fume hood is recommended Figure 6 Chart of Various Bath Fluids 8 3 11 2 About the Graph The fluid graph visually illustrates some of the important qualities of the fluids shown 26 Temperature Range The te
47. r a wide temperature range better results can generally be achieved by starting at the highest temperature and progressing down to the lowest temperature Probes can be held in place in the bath by using probe clamps or drilling holes in the access cover Other fixtures to hold the probes can be designed The object is to keep the reference probe and the probe s to be calibrated as closely grouped as possible in the working area of the bath Bath stability is maximized when the bath working area is kept covered In preparing to use the bath for calibration start by e Placing the reference probe in the bath working area e Placing the probe to be calibrated the UUT in the bath working area as close as feasibly possible to the reference probe Calibration of Multiple Probes Fully loading the bath with probes increases the time required for the temperature to stabilize after inserting the probes Using the reference probe as the guide be sure that the temperature has stabilized before starting the calibration Parts and Controls Back Panel 7 Parts and Controls The user should become familiar with the bath and its parts 7 1 Back Panel Figure 1 on this page Power Cord On the back of the calibrator is the removable power cord inlet that plugs into an IEC grounded socket Figure 1 7103 Back Panel and Bottom Power Switch The power switch is located on the power entry module PEM The PEM also houses the fuses Se
48. r equipment Refer to Section 3 1 Specifications for power details To turn on the bath switch the control panel power switch to the ON position The stir motor will turn on the LED display will begin to show the bath temperature and the heater will turn on or off until the bath temperature reaches the programmed set point When powered on the control panel display will briefly show a four digit number This number indicates the number of times power has been applied to the bath Also briefly displayed is data which indicates the controller hardware configuration and version number This data is used in some circumstances for diagnostic purposes Thermal Electric Devices TED The power to the bath is precisely controlled by the temperature controller to maintain a constant bath temperature Power is controlled by periodically switching the TEDs on for a certain amount of time using power transistors Fluid Drain The fluid may be drained from the 7103 by tightly screwing the transport pour access lid onto the top of the bath and pouring the liquid into an appropriate container Temperature Controller The bath temperature is controlled by Hart Scientific s unique hybrid digital analog temperature controller The controller offers the tight control stability of an analog temperature controller as well as the flexibility and programmability of a digital controller The bath temperature is monitored with a platinum resistance sensor in
49. r good control the viscosity should be less than ten centistokes Twenty centistokes is about the upper limit of allowable viscosity Viscosities greater than this cause very poor control stability and may also overheat or damage the stirring motor With oils viscosity may vary greatly with temperature When using fluids with higher viscosities the controller proportional band may need to be increased to compensate for the reduced response time Otherwise the temperature may begin to oscillate Specific Heat Specific heat is the measure of the heat storage ability of the fluid Specific heat to a small degree affects the control stability It also affects the heating and cooling rates Generally a lower specific heat means quicker heating and cooling The proportional band may require some adjustment depending on the specific heat of the fluid Thermal Conductivity Thermal conductivity measures how easily heat flows through the fluid Thermal conductivity of the fluid affects the control stability temperature uniformity and probe temperature settling time Fluids with higher conductivity distribute heat more quickly and evenly improving bath performance Thermal Expansion Thermal expansion describes how the volume of the fluid changes with temperature Thermal expansion of the fluid used must be considered since the increase in fluid volume as the bath temperature changes may cause overflow Excessive thermal expansion may also be undes
50. r or not a value is sent with the command following a character For example s lt CR gt will return the current set point and s 150 0 CR will set the set point to 150 0 degrees In the following list of commands characters or data within brackets and J are optional for the command A slash denotes alternate characters or data Numeric data denoted by n may be entered in decimal or exponential notation Characters are shown in lower 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 A terminating CR is implied with all commands 45 7103 Micro Bath User s Guide Interface Commands Table 5 Controller Communications Commands Command Description Command Format Command Example Returned Returned Example Acceptable Values Display Temperature Read current set point s etpoint s set 999 99 C or F set 150 00 C Set current set point to n s etpoint n s 200 00 Instrument Range Read temperature Temperature t t 999 99 C or F t556C Read temperature units u nits u ux UC Set temperature units u nits c f CorF Set temperature units to Celsius u nits c u c Set temperature units to u nits f u f Fahrenheit Read scan mode sc
51. rameter characterizes the low temperatures The value of this parameter is set at the factory for best instrument accuracy 10 10 1 10 1 1 10 1 2 Digital Communication Interface Serial Communications Digital Communication Interface The Micro Bath calibrator is capable of communicating with and being controlled by other equipment through the digital serial interface With a digital interface the instrument may be connected to a computer or other equipment This allows the user to set the set point temperature monitor the temperature and access any of the other controller functions all using remote communications equipment Communications commands are summarized in Table 5 on page 46 Serial Communications The calibrator is installed with an RS 232 serial interface that allows serial digital communications over fairly long distances With the serial interface the user may access any of the functions parameters and settings discussed in Section 9 with the exception of the baud rate setting Wiring RS 232 Cable Wiring for SE IBM PC and Compatibles The serial communications cable attaches to p Instrument Computer DTE the calibrator through the DB 9 connector at Connector Connector the back of the instrument Figure 8 shows ee di the pin out of this connector and suggested SC en cable wiring To eliminate noise the serial sTD 3TxD cable should be shielded with low resistance e Made 5GND pis GND
52. ration it must be handled with care The instrument should not be operated in an excessively dusty or dirty environment Maintenance and cleaning recommendations can be found in the Maintenance Section of this manual The instrument operates safely under the following conditions e ambient temperature range 5 45 C 41 113 F e ambient relative humidity maximum 80 for temperature lt 31 C decreasing linearly to 50 at 40 C e mains voltage within 10 of nominal e vibrations in the calibration environment should be minimized e altitudes less than 2 000 meters 4 1 4 2 Quick Start Unpacking Quick Start Caution READ SECTION 6 ENTITLED BATH USE before placing the bath in service Incorrect handling can damage the bath and void the warranty Unpacking Unpack the Micro Bath carefully and inspect it for any damage that may have occurred during shipment If there is shipping damage notify the carrier immediately Verify that the following components are present e 7103 Micro Bath e Transport Pour Access Lid e Probe Basket e Stir Bar e Power Cord e Manual e Access Cover if purchased Setup Caution DO NOT operate the instrument without fluid Place the calibrator 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 the nominal voltage corresponds to that indicated on the back of the calibrator Carefully inse
53. re range than mineral oil Like most oils silicone oils have temperature control characteristics which are somewhat poorer than water The viscosity changes significantly with temperature and thermal expansion also occurs These oils have very high electrical resistivity Silicone oils are fairly safe and non toxic Silicone oils are fairly expensive Fluid Characteristics Charts Table 3 on page 25 and Figure 6 on page 26 have been created to provide help in selecting a heat exchange fluid media for your constant temperature bath These charts provide both a visual and numerical representation of most of the physical qualities important in making a selection The list is not all inclusive There may be other useful fluids not shown in this listing The charts include information on a variety of fluids which are often used as heat transfer fluid in baths Because of the temperature range some fluids may not be useful with your bath 8 3 11 1 General Operation Bath Fluid Limitations and Disclaimer The information given in this manual regarding fluids is intended only to be used as a general guide in choosing a fluid Though every effort has been made to provide correct information we cannot guarantee accuracy of data or assure suitability of a fluid for a particular application Specifications may change and sources sometimes offer differing information Hart Scientific cannot be liable for any personal injury or damage to equipment produc
54. re to 25 C for one half hour before switching the power off Calibrating a Single Probe Insert the probe to be calibrated into the well of the bath 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 above 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 1 C degree for best results Caution Never introduce any foreign material into the well Stabilization and Accuracy The stabilization time of the Micro Bath depends on the conditions and temperatures involved Typically the test well will be stable to 0 1 C within 10 minutes of reaching the set point temperature Ultimate stability will be achieved 30 minutes after reaching the set temperature Inserting a cold probe into a well requires another period of stabilizing depending on the magnitude of the disturbance and the required accuracy For example inserting a 25 inch diameter room temperature probe at 125 C takes 5 minutes to be within 0 1 C of its settled point and takes 10 minutes to achieve maximum stability Speeding up the calibration process can be accomplished by knowing how soon to make the measurement Typical measurements should be made at the desired temperatures with the desired test probe
55. rial Port A DB 9 male connector is present for interfacing the calibrator to a computer or terminal with serial RS 232 communications Fan The fan inside the calibrator runs continuously when the unit 1s being operated to provide cooling for the instrument However the fan slows down when heating or at high temperatures Slots at the top and around the two corners of the calibrator are provided for airflow The area around the calibrator must be kept clear to allow 7103 Micro Bath User s Guide Front Panel 7 2 adequate ventilation The airflow is directed up through the top ventilation slots and out the back and sides of the unit Display Hold Terminals The 7103 has a display hold function which allows action of an external switch to freeze the displayed temperature and stop the set point from scanning Front Panel Figure 2 on page 18 Controller Display The digital display is an important part of the temperature controller because it not only displays set and actual temperatures but also displays various calibrator functions settings and constants The display shows temperatures in units according to the selected scale C or F Controller Keypad The four button keypad allows easy setting of the set point temperature The control buttons SET DOWN UP and EXIT are used to set the calibrator temperature set point access and set other operating parameters and access and set calibration parameters Settin
56. rornimerib EE 13 5 2 IDRY OUT Penos neier ette enn ne fe en er ete inire dunt 13 5 3 Bath Preparation and Filing it t rH os ees 13 BA svtuetostotettet rnt nduitsetuntu tet e tutelle tuc a TEE 14 GE oni e 15 0l General C an E a E Aa SEEE 15 6 2 Comparison Calibration ssssssssse eme 15 6 3 Calibration of Multiple PDrobes RH 16 7 Paris and Controls aiciisiiesa trea reb REF xR EE Ux Eege eau 17 MEO Sz tn aE 17 7 2 FOM Panel 5 ie tror maritimi rir EIN i M iU UE 18 Tao EE UTIMS EET PETERET 19 7 3 1 Transport Pour ACCESS d 19 8 KE Ee EE 19 KEE Ce elen EE 20 Sr M lac 20 General OPGratiOn E atic 21 8 1 Changing Display Une 21 8 2 Switching to 230V Operation inue een bees le ts Eu RE e EE amp 3 1 Temperature Ranger openee iraniana a EEANN AAEE tiia RE E 98 3 2 SPECE EE eteet g gur deet siene eg dn deni nte andre ox pone o es R 8 3 4 Thermal Cond cliVvily senii ceraint geet Seege ENEE arma cadre 8 3 5 ThermalEXparsiOEu tenetis beret cello Deech un uo oe 8 3 6 Electrical ResIStVIDy eei trt Rp E E HP nd re beet tente Eun 837 End Lifetime p pet deret vetet le ege denges tote pod ede d 83 8 Eelere ee EERSTEN c ECK Oe 8 23 10 Commonly Used FIUS eege re eret Ehre re te Lee teet eet e ER Hn 8 3 10 1 Water Distilled 8 3 10 2 Mineral Oil 8 3 10 3 Silicone Oil Dow Corning 200 05 200 10 200 20 8 3 11 Fluid Characteristics Charts eene 8 9 Id Linmitations and DISCIBlIer ac
57. rt the probe basket into the well Fill the well with the appropriate fluid The set point temperature and the number of and size of probes determine the fluid level Be sure to keep the fluid level an adequate distance below the top of the well to prevent overflowing the fluid when the probes are inserted For example placing 200 05 oil at room temperature 25 C into the bath and heating the unit to 126 C causes a 1l inch 2 54 cm expansion of the fluid inside the well Keep the fluid level at least 1 9 cm 0 75 inches below the top of the well at all times With the probe probes in the well fill the tank 3 4 full Heat to the maximum temperature of the fluid Slowly fill the well to 2 54 cm 1 inch below the top of the basket at the maximum temperature of the fluid or to the second ring on the basket 11 7103 Micro Bath User s Guide Power 4 3 4 4 Turn on the power to the calibrator by toggling the switch on the power entry module The fan should begin blowing air through the instrument and 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 connection The display shows the well temperature and the well TEDs start operating to bring the temperature of the well to the set point temperature Insure that the fluid is being stirred Power Plug the Micro Bath power cord into a mains outlet of the proper
58. rtation 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 repair 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 authorized service center Hart assumes no risk for damage in transit Following warranty repair the product 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 IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE HART SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES IN
59. ry the inside of the well with paper towels before filling Fill the bath at room temperature 25 C with silicon oil 200 05 to the second ring on the basket Under filling may reduce bath performance The fluid should never exceed a height of 1 9 cm 0 75 inches below the top of the basket Carefully monitor the bath fluid level as the bath temperature rises to prevent overflow or splashing Remove excess hot fluid if necessary with caution Note 200 05 Silicon Oil expands 2 54 cm 1 inch for a 100 C increase in temperature 7103 Micro Bath User s Guide Power 5 4 Power With the bath power switch off plug the bath into an AC mains outlet of the appropriate voltage frequency and current capacity Refer to Section 3 1 Specifications for power details 6 1 6 2 Bath Use General Bath Use Caution Read before placing the bath in service The information in this section is for general information only It is not designed to be the basis for calibration laboratory procedures Each laboratory will need to write their own specific procedures General Be sure to select the correct fluid for the temperature range of the calibration Bath fluids should be selected to operate safely with adequate thermal properties to meet the application requirements Also be aware that some fluids expand and could overflow the bath if not watched Refer to Section 8 3 Bath Fluid and subsequent subsections for information specific to fluid
60. s to establish these times 47 Calibration Procedure Calibration Points 12 Calibration Procedure Note This procedure is to be considered a general guideline Each laboratory should write their own procedure based on their equipment and their quality program Each procedure should be accompanied by an uncertainty analysis also based on the laboratory s equipment and environment Sometimes the user may want to calibrate the bath to improve the temperature set point accuracy Calibration is done by adjusting the controller probe calibration constants RO ALPHA DELTA and BETA so that the temperature of the bath as measured with a standard thermometer agrees more closely with the set point The thermometer used must be able to measure the well temperature with higher accuracy than the desired accuracy of the bath By using a good thermometer and following this procedure the bath can be calibrated to an accuracy of better than 0 5 C up to 125 C 12 1 Calibration Points In calibrating the bath RO ALPHA DELTA and BETA are adjusted to mini mize the set point error at each of three different bath temperatures Any three reasonably separated temperatures may be used for the calibration Improved results can be obtained for shorter ranges when using temperatures that are just within the most useful operating range of the Micro Bath The farther apart the calibration temperatures the larger will be the calibrated temperature range but the cali
61. selected using the UP and DOWN keys and then pressing SET See Figure 7 on page 32 Operating Parameters The operating parameters menu is indicated by PAr l Operating parameters menu The operating parameters menu contains the High Limit and Stir Speed parameters 9 8 1 1 9 8 1 2 9 8 2 Controller Operation Controller Configuration High Limit The High Limit Parameter adjusts the upper set point temperature The factory default and maximum temperature are set to 126 C For safety a user can adjust the HL down so the maximum temperature set point is restricted HL i High Limit parameter Press SET to accept the new temperature limit Stir Speed The Stir Speed parameter adjusts stirrer motor speed The factory default is 15 Str SP i Flashes Str Sp and then displays the setting 16 New Stir Speed setting Press SET to accept the new Stir Speed The stir motor speed needs to be varied for best stability Table 4 on page 27 shows nominal settings for several fluids Serial Interface Parameters The serial RS 232 interface parameters menu is indicated by Serial RS 232 interface parameters menu 39 7103 Micro Bath User s Guide Controller Configuration 40 9 8 2 1 9 8 2 2 9 8 2 3 The serial interface parameters menu contains parameters which determine the operation of the serial interface These controls only apply to instruments fitted with the serial interface The p
62. selection and to the MSDS sheet specific to the fluid selected Generally baths are set to one temperature and used to calibrate probes only at that single temperature This means that the type of bath fluid does not have to change Additionally the bath can be left energized reducing the stress on the system The bath generates extreme temperatures Precautions must be taken to prevent personal injury or damage to objects Probes may be extremely hot or cold when removed from the bath Cautiously handle probes to prevent personal injury Carefully place probes on a heat cold resistant surface or rack until they are at room temperature It is advisable to wipe the probe with a clean soft cloth or paper towel before inserting it into another bath This prevents the mixing of fluids from one bath to another If the probe has been calibrated in liquid salt carefully wash the probe in warm water and dry completely before transferring it to another fluid Always be sure that the probe is completely dry before inserting it into a hot fluid Some of the high temperature fluids react violently to water or other liquid mediums Be aware that cleaning the probe can be dangerous if the probe has not cooled to room temperature Additionally high temperature fluids may ignite the paper towels if the probe has not been cooled For optimum accuracy and stability allow the bath adequate stabilization time after reaching the set point temperature Comparison Cali
63. should be located in an appropriate environment The location should be free of drafts extreme temperatures and temperature changes dirt etc The surface where the bath is placed must be level Because the bath is designed for operation at high temperatures keep all flammable and meltable materials away from the bath Although the bath is well insulated top surfaces do become hot Beware of the danger of accidental fluid spills The bath should be placed on a heat proof surface such as concrete with plenty of clear space around the bath If the bath 1s operated at high temperatures a fume hood should be used to remove any vapors given off by hot bath fluid Dry out Period Before initial use after transport and any time the instrument has not been energized for more than 10 days the bath 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 Bath Preparation and Filling The 7103 Micro Bath is not provided with a fluid We suggest using Silicone 200 05 Dow Oil Fluids are available from Hart Scientific and other sources Although other fluids may be used the instrument may not meet the specifications detailed in Table 2 when Silicone 200 05 Dow Oil is not used Fluids are discussed in detail in Section 8 3 Remove the access lid from the bath and check the tank for foreign matter dirt remnant packing material etc Thoroughly d
64. sor The control sensor may be shorted open or otherwise Err 6 damaged The display shows Heater control error Initialize the system by performing the Factory Reset Sequence Err 1 described above The stirrer is not Stirrer speed needs adjusting In the Operating Parameters menu adjust the stirrer stirring speed Str SP to 0 Wait for the motor to stop Adjust the stirrer speed to a setting greater than 8 but less than or equal to 15 Temperature readout is not the actual temperature of the well Possible RF energy emission With the unit stable slowly rotate the unit If no change occurs the unit may need to be calibrated If the display changes more than twice the normal display deviation another unit in the area could be emitting RF energy Move the unit to a different location and rotate the unit again If the temperature is correct in this new area or deviates differently than the first are RF energy is present in the room If you have to perform the test in the effected area use the comparison test to eliminate any possible errors Instrument is unstable Varying line voltage or fluid is not stirring Place the unit on a clean power line If the fluid is not stirring turn the instrument off for one minute 55 7103 Micro Bath User s Guide Comments 56 14 2 14 2 1 14 2 2 Problem Possible Causes and Solutions AC voltage present on Use a wall plug tester to check the main power plug at the wa
65. t of any device inserted into the well Setting the temperature involves two steps 1 select the set point memory and 2 adjust the set point value Programmable Set points The controller stores 8 set point temperatures in memory The set points can be quickly recalled to conveniently set the calibrator to a previously programmed temperature set point To set the 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 7103 Micro Bath User s Guide Temperature Set point Display Temperature Y SET v vd uP Select Setpoint v Adjust Setpoint v Units C F Scan On Off DOWN p SET DOWN y EXIT Scan Rate y Switch Hold Display Mode Display of Rs gt SET UP EXIT LI Toggles C F Secondary Functions p SET EXIT EL Display Power 1 Set Proportional Band Configuration Menu SET EXIT Menu Legend Press SET to step through the menu an
66. t or facilities resulting from the use of these fluids The user of the bath is responsible for collecting correct information exercising proper judgment and insuring safe operation Operating near the limits of certain properties such as the flash point or viscosity can compromise safety or performance Your company s safety policies regarding flash points toxicity and such issues must be considered You are responsible for reading the MSDS material safety data sheets and acting accordingly Table 3 Table of Various Bath Fluids Fluid Lower Upper Specific Thermal Thermal Hart Temperature Temperature Flash Viscosity Specific Heat Conductivity Expansion Resistivity Part No Limit Limit Point centistokes Gravity cal g C cal s cm C cm cm C 10 O cm Halocarbon 90 C v 70 C e NONE 5 7 50 C 171 40 C 0 2 0 0004 0 0011 0 8 0 8 40 C 5019 0 5 70 C Methanol 96 C fr 60 C b 54 C 13 35 C 0 810 9 0 C 0 6 0 0005 20 C 0 0014 25 C 0 66 0 C 0 792 20 C 0 45 20 C Water 0 C fr 95 C b NONE 1 25 C 1 00 1 00 0 0014 0 0002 25 C 0 4 75 C Ethylene 35 C fr 110 C b NONE 7 0 C 1 05 0 8 0 C 0 001 Glycol 50 2 50 C 5020 0 7 100 C Mineral Oil 40 C v 190 C fl 190 C 15 75 C 0 87 25 C 0 48 25 C 0 00025 25 C 0 0007 50 C 5 25 C 5 125 C 0 84 75 C 0 53 75 C 0 81 125 C 0 57 125 C Dow
67. th was designed for portability low cost and ease of operation Through proper use the instrument will continuously provide accurate calibration of temperature sensors and devices The user should be familiar with the safety guidelines and operating procedures of the calibrator as described in the instruction manual Specifications and Environmental Conditions Specifications 3 Specifications and Environmental Conditions 3 1 3 2 Specifications Table 2 Specifications Range 30 to 125 C 22 to 257 F Accuracy 0 25 C Stability 0 03 C at 25 C oil 5010 0 05 C at 125 C oil 5010 Uniformity 0 02 C Resolution 0 01 C F Operating Temperature 5 to 45 C 41 to 113 F Heating Time 25 C to 100 C 35 minutes Cooling Time 25 C to 25 C 45 minutes Well Size 2 5 dia x 5 5 deep 64 x 139 mm access opening is 1 9 48 mm in diameter Size 9 W x 13 2 H x 10 5 D 23 x 34 x 26 cm Weight 22 Ib 10 kg with fluid Display LED Switchable C or F Cooling Fan and Thermal Electric Devices TED Fault Protection Sensor burnout and short protection Power 94 234 VAC 410 50 60 Hz 400 W Safety Overvoltage Installation Category II Pollution Degree 2 per IEC 61010 01 Fuse Rating 250 V 5A F fast acting NO USER SERVICEABLE PARTS Environmental Conditions Although the instrument has been designed for optimum durability and trouble free ope
68. the control probe The signal is electronically compared with the programmable reference signal amplified and then fed to a pulse width modulator circuit which controls the amount of power applied to the bath heater The bath is operable within the temperature range given in the specifications For protection against solid state relay failure or other circuit failure a bi metallic cut out automatically turns off the heater anytime the bath temperature exceeds the maximum temperature The controller allows the operator to set the bath temperature with high resolution adjust the proportional band monitor the heater output power and program the controller configuration and calibration parameters The controller may be operated in temperature units of degrees Celsius or Fahrenheit The controller 1s operated and programmed from the front control panel using the four key switches and digital LED display The controller is equipped with a serial RS 232 digital interface for remote operation Operation using the digital interfaces is discussed in Section 10 Digital Communication Interface General Operation Temperature Controller When the controller is set to a new set point the bath heats or cools to the new temperature Once the new temperature is reached the bath usually takes 15 20 minutes for the temperature to settle and stabilize There may be a small overshoot or undershoot 29 9 1 9 2 9 2 1 Controller Operation Well Te
69. ymbols 1 Table 2 Specifications ssssssssssssee eene 9 Table 3 Table of Various Bath Fluids sssssssss rererere rrrn ernennen 25 Table 4 Nominal Stirrer Motor Settings With Different Liquids 27 Table 5 Controller Communications Commande 46 vii viii Figures Figure 1 7103 Back Panel and Bottom sssssssssssssssee 17 Figure 2 7103 Front Panel 18 Figure 3 Bath Lids and dats 19 Figure 4 Probe Basket E 20 Foure S Sur Bali seir 20 Figure 6 Chart of Various Bath Fluids 26 Figure 7 Controller Operation Flowchart cccccccceeceececeeteeeteeeesetteeetteeeeees 32 Figure 8 Serial Cable Wiring ssssssss eene 43 Before You Start Symbols Used Before You Start Symbols Used Table 1 lists the International Electrical Symbols Some or all of these symbols may be used on the instrument or in this manual Table 1 International Electrical Symbols Symbol Description ING AC Alternating Current ING AC DC Battery C CE Complies with European Union directives DC Double Insulated Electric Shock Fuse PE Ground Hot Surface Burn Hazard Read the User s Guide Important Information Off OPPOIPa On Oo amp v A c o Canadian Standards Association 7103 Micro Bath User s Guide Safety Information 1 2 1 2 1 Symbol Description OVERVOLTAGE Installation CATEGORY II

Download Pdf Manuals

Related Search

Related Contents

Lenovo ThinkPad W520  Clarity ENR County User Manual - Macoupin County, IL Elections  Monte Carlo Fan Company 5KBR54 User's Manual  Teasi One - User Manual _NL  GUÍA DEL USUARIO  La mort en droit social  Suncast BMS8100 Use and Care Manual  Tucano Elektro  User Manual  RACIONALIZAÇÃO DO GASTO PÚBLICO:  

Copyright © All rights reserved. Failed to retrieve file