Barnstead International MIRAK 725 Series Operation Manual And Parts List

Hot plates, stirrers and stirring hot plates

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MIRAK™ Hot Plates,

Stirring Hot Plates

SERIES 725, 726, 727, 728, 729, 730

LT727X7 • 9/19/02

Stirrers and

OPERATION MANUAL

AND PARTS LIST

Model #

HP72620

HP72620-26

HP72624

HP72625

S72520

S72520-26

S72524

S72525

SP72720

SP72720-26

SP72724

SP72725

HP72930

HP72930-26

HP72934

HP72935

HP72935-60

HP72938

HP72938-60

S72830

S72830-26

S72834

S72835

SP73030

SP73030-26

SP73034

SP73035

SP73035-60

SP73038

Voltage

Description

240

220-240

100

120

240

220-240

100

120

240

220-240

100

120

240

220-240

100

120

208

240

220-240

100

120

240

220-240

100

120

208

7x7

12x12

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Page 1 MIRAK™ Hot Plates, Stirrers and Stirring Hot Plates OPERATION MANUAL AND PARTS LIST SERIES 725, 726, 727, 728, 729, 730 Model # Voltage Description HP72620 HP72620-26 220-240 HP72624 HP72625 S72520 S72520-26 220-240 S72524 S72525 SP72720 SP72720-26 220-240 SP72724 SP72725 HP72930 12x12 HP72930-26 220-240...
Page 2: Table Of Contents
Table of Contents Safety Information ..............................3 Alert Boxes ..............................3 Warnings ..............................3 Introduction................................5 Unpacking ................................6 Installation ................................8 Principles of Operation............................9 Operation ................................10 Removing the Clear Plastic Cover......................10 The Power Switch ............................10 Setting the Stirring Speed ..........................10 Stirring Speed Guide ..........................11 Setting the Temperature..........................11 Controlling Top Plate Temperature ......................12 Controlling Solution Temperature ......................12 Calibrating the Probe Temperature Input....................13...
Page 3: Safety Information
Safety Information Your Thermolyne MIRAK™ stirrer, hot plate, or stirring hot Alert Signals plate has been designed with function, reliability, and safety in mind. It is your responsibility to install it in con- formance with local electrical codes. Warning Warnings alert you to a possibility of Warnings personal injury.
Page 4 Material Safety Data Sheets (MSDS) for infor- mation regarding proper handling and recommended pro- tective equipment. For additional MSDS copies, or addi- tional information concerning the handling of refractory ceramic products, please contact the Customer Service Department at Barnstead International at 1-800-553-0039.
Page 5: Introduction
Introduction Please read all the information in this manual before operating the unit. Your Thermolyne MIRAK™ hot plate, stirrer or stirring hot plate is a general purpose heating and/or stirring plate designed for laboratory procedures requiring precise con- trol of temperature and/or stirring speed. Each MIRAK model includes a digital display for monitoring actual tem- perature or stirring speed, and the stirring hot plate mod- els have dual displays so temperature and stirring speed...
Page 6: Unpacking
Unpacking Remove your MIRAK hot plate, stirrer or stirring hot plate from the carton. Inspect to ensure that the unit has not been damaged during shipment. If the unit appears to have sustained shipping damage contact the distributor from whom you purchased this product or Barnstead International Customer Service at 800-553-0039.
Page 7 NPACKING...
Page 8: Installation
Installation Set the unit on a flat stable surface at least 12" away from combustible materials, and plug the cordset into a proper- Warning ly grounded electrical outlet of correct voltage and current Use a properly grounded electrical handling capacity. Use your right hand to locate the outlet of correct voltage and current ON/OFF power switch which is on the side, near the front handling capacity.
Page 9: Principles Of Operation
Principles of Operation Each MIRAK unit utilizes the latest in microprocessor technology to deliver the most reliable, accurately con- trolled, ceramic top hot plate, stirrer and stirring hot plate on the market. Your MIRAK hot plate or stirring hot plate has an electron- ic closed-loop feedback control which will accurately maintain temperature setpoints from 40°C through 370°C or 540°C, depending on the model.
Page 10: Operation
Operation Removing the Clear Plastic Warning Cover Use caution when heating volatile materials; top surface and element Your MIRAK unit has a protective plastic cover over the can reach the “Flash Point front control panel. This plastic cover is designed to pro- Temperature”...
Page 11: Stirring Speed Guide
PERATION speed or counterclockwise to decrease the speed. The unit will not start to stir until you press the speed control knob. Once the unit begins stirring the display will register ACTUAL speed and the SET light will no longer be illumi- nated.
Page 12: Controlling Top Plate Temperature
PERATION accessory ungrounded Type K thermocouple probe. (A 6" or 10" stainless steel general purpose immersion probe, or a chemical-resistant 7" Teflon® immersion probe are available through your distributor, or by contacting Barnstead/Thermolyne, 800-553-0039). Your MIRAK hot plate, stirrer or stirring hot plate will accept any ungrounded Type K thermocouple probe, however the accuracy of probes other than the ones we've tested and specified may exceed the probe accuracy rating we've designated.
Page 13: Calibrating The Probe Temperature Input
PERATION maintain a precise setpoint we recommend using a probe to control the solution temperature instead of controlling Warning the top plate temperature. If the probe is plugged into your stir- ring hot plate while the heat control is When using a probe with your MIRAK hot plate or stirring operating but is not in solution, the hot plate it is recommended that you use a clamp on a temperature display will continue to...
Page 14: Using The Probe With The Temperature Display For Stirring-Only Applications
PERATION Calculate the necessary correction for the probe using the following equation: Probe Error= (displayed temperature) - (actual temperature measured by other source) Correction= 350 - Probe Error (if the error is negative, the correction is >350) Turn the unit on. The display will show "888" and then "000".
Page 15: To Achieve Fast Heat-Up Of Large Volumes
PERATION To Achieve Fast Heat-up of Large Volumes With a Probe When heating large volumes of solution preheat the top plate at maximum temperature to allow the plate to heat the solution quickly before plugging your probe in to the probe receptacle in the back of the unit.
Page 16: Heat-Up Time Guide
PERATION regulating the top plate temperature, metal vessels and sand baths may be heated safely without the danger of the ceramic top breaking. When heating metal vessels and sand baths however, we recommend that you DO NOT use the probe to control the temperature.
Page 17: Operating Specifications
Operating Specifications Heating Specifications Top Plate Surface - Solid Ceramic Temperature range All 7" x 7" models and the 208 and 240 volt models of the 12" x 12" models. 40°C to 540°C 100 and 120 volt 12" x 12" models. 40°C to 370°C Heat-up time to maximum temperature (unloaded top plate).
Page 18: General Operating Specifications
General Operating Specifications Dimensions- 7" x 7" Models Model Numbers HP72620 SP72720 S72520 HP72620-26 SP72720-26 S72520-26 HP72624 SP72724 S72524 HP72625 SP72725 S72525 Overall Width 8.250 (20.96) 8.250 (20.96) 8.250 (20.96) Overall Height 5.750 (14.61) 5.750 (14.61) 5.50 (13.97) Overall Depth 12.250 (31.12) 12.250 (31.12) 12.250 (31.12)
Page 19: Electrical Ratings- 12" X 12" Models\L 2
ENERAL PERATING PECIFICATIONS Electrical Ratings- 12" x 12" Models Model No. Volts Amps Watts Freq. Phase HP72930 220-240 3100 50/60 HP72930-26 220-240 3100 50/60 HP72934 16.5 1650 50/60 HP72935 13.5 1620 50/60 HP72935-60 13.5 1620 50/60 HP72938 13.9 2900 50/60 S72830 220-240 0.22...
Page 20: Maintenance And Servicing
Maintenance and Servicing Replacing the Power Board Warning Unplug unit, turn unit upside down and remove Disconnect from power supply before screws from bottom. servicing. Open unit. Locate power board at the back of Keep top surface clean. Use a non- the unit.
Page 21: Replacing The Logic Board
AINTENANCE AND ERVICING Replacing the Logic Board Unplug unit, turn unit upside down and remove screws from bottom. Open unit. Locate logic board in the cen- ter of the unit. Note the position and color of wires and cables connected to the board. Remove the wires, cables and the 2 nuts on the mounting bracket.
Page 22: Replacing The Motor
AINTENANCE AND ERVICING Note the position of the blue stripe running along the bottom of the cable connected to the board. Disconnect the cable from the board. Loosen the nuts and remove board from front panel. Replace board, reconnecting cable as noted in step 3.
Page 23: Replacing The Top Plate Assembly
AINTENANCE AND ERVICING 11. Remove the two screws holding the motor and replace the motor. 12. Replace the magnet assembly. 13. Flip plate over, making sure thermocouple wire comes through the plate. Reinsert screws and tighten. (Stirrers do not have thermocouple wires.) 14.
Page 24: Set-Up Procedure
AINTENANCE AND ERVICING Remove metal plate and then unscrew top plate assembly. Replace top plate assembly and reattach top plate assembly to the case. Replace metal plate, making sure thermocouple and element wires come through metal plate. Then insert screws and tighten. Replace logic board and mount on bracket.
Page 25 AINTENANCE AND ERVICING this difference; you may need to refer to it in step #9. If the difference is zero ±3 your unit is within tolerance and you do not need to contin- ue. If your difference exceeds zero ±3 (i.e., if it is ±4, ±5, ±6, etc.) continue with steps 4 through 13.
Page 26 AINTENANCE AND ERVICING positive or negative. The number on the display is positive if the HOT light is on. If the HOT light is off the number on the display is negative. Refer to the difference that you recorded in step #3.
Page 27: Troubleshooting Guide
Troubleshooting Problem Solution Unit is not operating at all. Check power. Replace circuit breaker on power switch. Unit is stirring or heating, but no lights Check cable to the display board. are lit on the display. Only the power light is lit on the display. Check ribbon cable connection from the power board to the logic board.
Page 28 Exploded Views...
Page 29 XPLODED IEWS...
Page 30 XPLODED IEWS...
Page 31: Replacement Parts List
Replacement Parts List To insure your safety and for proper operation, the ceramic top plates for hot plates and stir plates are only sold as complete assemblies. This assembly includes the ceramic top, element, thermocouple, insulation, baffle plate, and 2 ceramic top holders. Key Number Part Number Unit Size...
Page 32 EPLACEMENT ARTS Key Number Part Number Unit Size Unit Voltage Item Description Power Supply Printed Circuit Boards: (Back of Unit) PC725X1A 7" & 12" 120V Stirrers PC725X2A 7" & 12" 220-240V Stirrers PC725X3A 7" & 12" 100V Stirrers PC726X2A 7" & 12" 220-240V Hot Plates PC726X3A...
Page 33: Ordering Procedures
If the dealer cannot handle your request, then contact our Customer Service Department at 563-556-2241 or 800-553-0039. Prior to returning any materials to Barnstead International, please contact our Customer Service Department for a “Return Goods Authorization” number (RMA). Material...
Page 36: Warranty
SALE, USE OR PERFORMANCE OF ANY PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CON- TRACT, TORT (INCLUDING NEGLIGENCE), ANY THEORY OF STRICT LIABILITY OR REGULATORY ACTION. The name of the authorized Barnstead International dealer nearest you may be obtained by calling 1-800-446-6060 (563-556-2241) or writing to: 2555 Kerper Boulevard P.O.

Barnstead International MIRAK 725 Series Operation Manual And Parts List

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