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Barnstead International MIRAK 725 Series, Operation Manual And Parts List, Page: 28 / 36

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Barnstead International MIRAK 725 Series Operation Manual And Parts List Download Page 28

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Summary of Contents for MIRAK 725 Series

Page 1: ...72524 100 7x7 S72525 120 7x7 SP72720 240 7x7 SP72720 26 220 240 7x7 SP72724 100 7x7 SP72725 120 7x7 HP72930 240 12x12 HP72930 26 220 240 12x12 HP72934 100 12x12 HP72935 120 12x12 HP72935 60 120 12x12...

Page 2: ...ths 15 Heat up Time Guide 16 Operating Specifications 17 Heating Specifications 17 Stirring Speed Specifications 17 General Operating Specifications 18 Dimensions 7 x 7 Models l 2 18 Dimensions 12 x 1...

Page 3: ...lug unit and remove spills promptly Do not immerse unit for cleaning 3 Replace the top immediately if damaged by etching scratching or chipping A damaged top can break in use 4 Do not remove or modify...

Page 4: ...terials can be located in the door the hearth collar in the chamber of the product or under the top plate top Tests performed by the manufacturer indi cate that there is no risk of exposure to dust or...

Page 5: ...Type K thermocouple sensor or the solution temperature may be controlled by utilizing an accessory ungrounded Type K thermocouple probe A 6 or 10 general purpose stain less steel immersion probe or a...

Page 6: ...ling the packaging material toward you 6 Unpacking Note A special 20 amp cord set is included on the CSA approved models of the 12 x 12 120 volt MIRAK hot plate and stirring hot plate HP72935 SP73035...

Page 7: ...7 UNPACKING...

Page 8: ...ning Use a properly grounded electrical outlet of correct voltage and current handling capacity Do not remove or modify grounded power plug Use only properly ground ed outlets to avoid shock hazard No...

Page 9: ...than the error of the unit The MIRAK units use a Type K thermocouple for measur ing both the top plate temperature and the solution tem perature when using the probe Both top plate surface and probe t...

Page 10: ...on the front control panel Setting the Stirring Speed Your MIRAK stirrer or stirring hot plate has an electronic feedback speed control which will maintain a precise speed setpoint from 60 rpm throug...

Page 11: ...Size Stirbar Size Amt in Solution Viscosity Max Speed 7 x 7 MIRAK 1 liter 2 800 ml water 1200 rpm 7 x 7 MIRAK 2 liter 2 1800 ml water 1200 rpm 7 x 7 MIRAK 1 liter 2 1000 ml Cooking oil 700 rpm 7 x 7...

Page 12: ...returns to indicating the actual temperature If you want to ensure that the unit will not heat if the knob is inadvertently pressed turn the temperature control knob until the display indicates the w...

Page 13: ...insert a calibrated thermometer into a solution you are heating on the stirring hot plate When the thermometer reading has stabilized record the temperature readings given by both the thermometer and...

Page 14: ...side down and remove screws from bottom Move jumper J1 to one pin of J11 For 100 and 120 volt units replace jumper J3 if necessary 8 Replace the bottom of the unit Using the Probe with the Temperature...

Page 15: ...ll volumes quickly it should not be necessary to preheat the solution at a higher temperature By not preheating small volumes you avoid the potential for the temperature to overshoot your desired setp...

Page 16: ...be monitored with a standard laboratory thermometer 16 OPERATION Heat up Time Guide Unit Temperature Flask Size Amount of Solution Time to Setpoint Vigorous Boil 7 x 7 MIRAK 540 C 1 liter 1000 ml wate...

Page 17: ...y vs the actual temperature at the center of the 4 0 C top plate setpoint 70 C Top plate temperature was verified with an infrared camera mounted approx 26 above the center of the top plate surface te...

Page 18: ...8 SP73038 S72835 Overall Width 13 500 34 29 13 500 34 29 13 500 34 29 Overall Height 6 750 17 15 6 750 17 15 6 438 16 35 Overall Depth 16 625 42 23 16 625 42 23 16 625 42 23 Top Plate Width 12 375 31...

Page 19: ...60 1 SP73030 26 220 240 12 3130 50 60 1 SP73034 100 16 8 1671 50 60 1 SP73035 120 13 8 1642 50 60 1 SP73035 60 120 13 8 1642 50 60 1 SP73038 208 14 1 2926 50 60 1 Temperature Range for Hot Plates and...

Page 20: ...3 6 Replace the bottom and secure it with screws Maintenance and Servicing Warning Disconnect from power supply before servicing Keep top surface clean Use a non abrasive cleaner Alkali spills hydro...

Page 21: ...ket 5 Replace board and mount on bracket adjusting the encoder wheel so that it freely rotates through the black slot opti cal pickup on the logic board The black slot on the logic board should projec...

Page 22: ...m 2 Open unit Note position and color of wires and cables connected to the logic and display boards 3 Remove logic board as described above 4 Remove the wires and cable from the power board It is not...

Page 23: ...ould project no further than the holes in the outer perimeter of the encoder wheel 16 Reconnect wires as noted in step 2 17 Replace the display board and reconnect wires as noted in step 2 18 Replace...

Page 24: ...e temperature meas urement on the thermometer Ideally the ther mometer should read between 41 C and 47 C Subtract 44 degrees from the thermometer reading If your thermometer reading is greater than 44...

Page 25: ...on on page 16 This black plastic jumper is secured on only one pin at that location Do not use the jumper located directly next to this jumper at position Jz3 which is secured by two pins If the black...

Page 26: ...ou recorded in step 3 was less than 3 turn the knob COUNTERCLOCKWISE counting each click of the knob until you have advanced the knob the same number of posi tions as the difference you calculated in...

Page 27: ...ard Replace encoder switch es on knob s Speed or temperature display does not Check ribbon cable from knob to logic board change when knob is pushed Replace logic board Unit does not stir Check to see...

Page 28: ...28 Exploded Views...

Page 29: ...29 EXPLODED VIEWS...

Page 30: ...30 EXPLODED VIEWS...

Page 31: ...ate or Hot Plate Top Assembly PT467X1 7 100 240V Stirrer Top Plate Only PT472X1 12 100 240V Stirrer Top Plate Only 2 CV727X2 7 100 240V Clear Plastic Cover CV730X2 12 100 240V Clear Plastic Cover 3 KB...

Page 32: ...2 120V Stirrers PC725X2A 7 12 220 240V Stirrers PC725X3A 7 12 100V Stirrers PC726X2A 7 12 220 240V Hot Plates PC726X3A 7 12 100V Hot Plates PC726X4A 7 12 120V Hot Plates PC727X1A 7 12 120V Stir Plates...

Page 33: ...this unit or can be obtained promptly from the factory When service or replacement parts are needed we ask that you check first with your dealer If the dealer cannot handle your request then contact...

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Page 36: ...nsistent with written operating instructions for the product mishan dling contamination overheating modification or alteration of the product by any customer or third party or iii use of replacement p...

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