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CANNON Instrument Company | Appendix I: Correcting Shaft & Impeller Misalignment 

41 

 

Appendix I: Correcting Shaft & Impeller 
Misalignment 

Motor-stirrer units supplied by Cannon Instrument Company are checked after assembly to ensure 
minimum run-out (deviation from concentric rotation) at the impeller end of the shaft. The 
following instructions are intended to assist those who may be experiencing excessive vibration in 
the motor-stirrer because of shaft run-out or misalignment of the impeller blades. 

Set Screw Alignment 

The motor shaft contains a flat area. The coupling should be oriented in such a way that the set 
screw is aligned with the flat. The stirrer shaft and motor shaft should be inserted to approximately 
the same length in the coupling. 

You can test for shaft run-out and impeller blade alignment by placing the motor on a soft surface 
with impeller facing up. 

Connect the motor to the appropriate AC power source and observe the impeller and shaft. If run-
out is severe, the motor will vibrate and the shaft will flutter noticeably. The impeller will appear 
blurred if the impeller blades are not in the same plane. 

If necessary, adjust the impeller blades by bending the large horizontal sections of each of the four 
segments so that they lie in the same plane. Since these segments are easily bent, check alignment 
whenever the impeller is bumped, or if there is any suspicion that the blade segments may have 
become misaligned. 

Shaft Run-Out Correction Procedure 

Use the following procedure to correct shaft run-out: 

1.

 

Remove the motor-stirrer from the CT-2000 bath. 

2.

 

Grasp the motor firmly with the left hand. 

Summary of Contents for CT-2000

Page 1: ...Instruction Operation Manual CT 2000 Constant Temperature Bath 27 9991 ...

Page 2: ......

Page 3: ...stered trademarks of Cannon Instrument Company Contact Address CANNON Instrument Company 2139 High Tech Road State College PA 16803 USA Phone 1 814 353 8000 1 800 676 6232 Fax 1 814 353 8007 Website www cannoninstrument com Email Sales sales cannoninstrument com Service service cannoninstrument com Manual P N 27 9990 ...

Page 4: ......

Page 5: ...utoff Detection 5 Liquid Level Sensor 5 Specifications 7 Unpack Assemble 8 Unpack the CT 2000 8 Damaged Items 9 Assembly Procedure 9 Insert Viscometer Tubes Thermometers 15 Thermometer Immersion 15 Filling the Bath 15 Drain the Bath 17 Bath Operation 18 Cold Start 18 Bath Lighting 18 Warm Start 19 Self Test Sequence 19 Front Panel Operations 22 ENTER 23 Selecting Options Cancelling Options 23 Sett...

Page 6: ...tions 29 Change Port Speed 29 Keypad Sequence 29 MODE 29 Procedure 29 Keypad Sequence 30 Reports 30 Keypad Sequence 31 Full Duplex point to point Connections 31 Half Duplex and Polled Multi Drop Operations 31 Commands Queries Responses 32 Downloading Firmware 32 Troubleshooting 36 Spare Parts List 38 Warranty 39 Products Limited Warranty 39 Reagent and Chemical Warranty 39 Returning a Product to C...

Page 7: ...e 8 Checking Support Ring is Seated Properly 10 Figure 9 Placing Rubber Gasket around Rim of Jar 11 Figure 10 Installing Bath Jar 11 Figure 11 Placing Inner Glass Plate 11 Figure 12 Remove Heater Housing 13 Figure 13 Install Motor Stirrer 13 Figure 14 CT 2000 Electrical Connections 14 Figure 15 CT 2000 Top View shown without Hole Covers 15 Figure 16 Filling the Bath 16 Figure 17 LCD Temperature Se...

Page 8: ...bles Table 1 CT 2000 Specifications 7 Table 2 CT 2000 Self Test 19 Table 3 Commands 33 Table 4 Troubleshooting Causes and Solutions 36 Table 5 CT 2000 Spare Parts List 38 Table 6 Ideal Bath Liquid 43 Table 7 CT 2000 Bath Fluid Options 10 C to 150 C 43 ...

Page 9: ...f its temperature stability and ease of use it is also suitable for any other application where temperatures must be maintained within hundredths of one degree Celsius The CANNON CT 2000 is designed to maintain temperatures from 10 C to 150 C Figure 1 CANNON CT 2000 Extended Range Constant Temperature Bath Temperature Selection and Selection The CT 2000 offers convenient keypad entry of temperatur...

Page 10: ...even round holes 51 mm two inches in diameter for insertion of viscometer holders Two smaller holes are provided for thermometers as shown in Figure 2 Twin fluorescent lamps provide glare free illumination of the bath Figure 2 CT 2000 Top View of Viscometer Holders Microprocessor circuitry functioning in tandem with a pair of heaters and a stainless steel encased RTD provides stable and accurate t...

Page 11: ...n 3 ASTM D445 Specifications The CT 2000 temperature control provides the accuracy required by ASTM D445 for kinematic viscosity measurements Cooling Coil A built in cooling coil when connected to tap water or a cooling system permits operation to 10 C ...

Page 12: ... content that follows Cautions alert the operator to conditions that may damage equipment Warnings alert the operator to conditions that may cause injury It is prohibited to copy or reproduce in part or in whole this manual without authorization by copyright If you should find any part in this manual not clear to understand or missing article contact your local CANNON dealer or sales representativ...

Page 13: ... as a laboratory table or bench Do not place instrument on a cart or stand If any liquids are spilled into the electronic components of the CT 2000 contact Cannon Instrument Company immediately Position power cords so they will not be walked on or pinched by items placed on or against them Keep all connections as neat as possible Unplug the power cord from the wall outlet if the CT 2000 will not b...

Page 14: ...bath fluid and refer to the Material Safety Data Sheets included with the bath fluid for more detail Caution Do not attempt to service the CT 2000 system by removing panels and trying to effect repairs Contact CANNON regarding service and repair needs MAINS The MAINS symbol indicates the connections for the AC power supply The AC power input must match the electrical specifications of the instrume...

Page 15: ... 58 4 cm 17 25 in 18 25 in 23 in Weight 51 4 kg 113 lb Sample Capacity 7 Temperature Range Accuracy 10 C to 100 C 0 01 C 100 C to 150 C 0 03 C Test temperatures 40 C and high ambient temperature test environments require an optional bath cooler Bath Height 12 inches Bath Volume 17 L 4 5 gal Operating Conditions 15 C to 30 C 10 to 75 relative humidity non condensing Installation Category II Polluti...

Page 16: ...older Instruction manual The bath unit housing is shipped completely assembled However the glass jar the glass panels and the motor and stirrer must be installed To install these components some disassembly of the bath unit housing is required The tools required are a utility knife Phillips screwdriver and a 1 8 Allen wrench which is included with the bath The utility knife and Philips screwdriver...

Page 17: ...e packaged in the original shipping container Refer to the Warranty section of this manual for instructions on returning defective equipment Customers outside the United States should contact their local CANNON agent for procedures on returning products to Cannon Instrument Company Assembly Procedure 1 Unpack the bath unit housing and move it to its permanent location on a stable laboratory bench ...

Page 18: ...r Top Covers 5 Remove the glass jar from its box and packing using caution as it is heavy Caution The glass jar is heavy Use caution when lifting removing jar 6 Ensure the rubber support ring is properly seated around the bottom of the jar opening in the bath unit as shown in Figure 8 Figure 8 Checking Support Ring is Seated Properly 7 Place the rubber gasket around the top rim of the jar The rubb...

Page 19: ...he float level located on the upper left corner of the inside of the cabinet 9 Lower the glass jar into the cabinet so it seats squarely on the rubber support ring Refer to Figure 10 Figure 10 Installing Bath Jar 10 Remove the wrapping from around the two glass panels Place the thinner of the two pieces of glass in the slot closest to the jar Refer to Figure 11 Figure 11 Placing Inner Glass Plate ...

Page 20: ...er c Pull out the electronics drawer using the handles installed on the front of the unit Press down or pull up on the plastic release bars on either side of the drawer track to release the drawer then pull the drawer completely free of the unit and set it aside d When the drawer is removed locate the four 20 set screwsvisible at the top of the drawer opening underneath thebath e Turn the set scre...

Page 21: ... Use care when inerting the motor shaft and impeller to prevent damage to delicate components Note Two screws located on either side of the opening serve as the locating pins for the motor support pad Do not remove these screws as the holes in the pad fit loosely over their heads The motor line cord should point towards the rear of the bath offset slightly to the right or left The motor stirrer sh...

Page 22: ...mthe rear and that the control probe over temperature probe and level switch cords exit from the right side opening also viewed from the rear The back lip on the rear top cover fits into the slot on the top heater housing Line up the holes insert screws andtighten 19 Adjust the four leveling feet on the bottom of the bath housing to level the bath jar This adjustment must be done prior to filling ...

Page 23: ...rted to a depth which ensures that the liquid under test and or any timing marks are a minimum of 6 mm below the top level of the liquid Thermometer Immersion Proper thermometer immersion is critical for viscosity measurements Even a calibrated thermometer will read incorrectly if it is not properly immersed in the bath Total immersion kinematic viscosity thermometers should be used with the bulb ...

Page 24: ...Refer to Figure 16 Figure 16 Filling the Bath 3 Continue to add fluid until the bath liquid level has risen to within approximately 40 mm 1 5 of the top of the jar 4 Turn the instrument power ON and incrementally heat the bath to desired control temperature while monitoring the bath liquid level carefully The bath level must be 15 mm to 20 mm approximately to from the top of the jar at the control...

Page 25: ...ain the Bath If it becomes necessary to drain the liquid from the bath follow the steps outlined in this section 1 Obtain a suitable container to hold all of the liquid drained from the bath approximately 20 to 22 liters or 4 5 to 5 gallons ensuring that the bath liquid is within 10 C of ambient temperature 2 Insert a tube into the bath chamber from the top opening and siphon the liquid from the b...

Page 26: ...ssful test procedure the results are briefly displayed on the LCD screen The bath heaters are activated and the Bath Unit begins controlling the temperature according to the most recent temperature entry The current bath temperature and the target bath temperature are visible on the liquid crystal display LCD as shown in Figure 17 Figure 17 LCD Temperature Setting To Cold Start the CT 2000 toggle ...

Page 27: ...2 After waiting at least five seconds turn the BATH power switch to the ON position and wait for the display to indicate either a warm or cold start again 3 If the bath comes up in a Cold Start condition and starts its normal self test sequence it is likely that a momentary power interruption caused the Warm Start condition and no further action is required 4 If the bath continues to enter the War...

Page 28: ...ies function and consistency Voltage Levels Verifies power supply voltage levels positive and negative Figure 19 illustrates the LCD sequence for a normal self test Figure 19 Normal Test Sequence Display If the self test sequence is accomplished successfully the CT 2000 commences normal operations ...

Page 29: ... self test by pressing the ENTER key If ENTER is pressed the Attempting Normal Operation LCD message appears as shown in Figure 21 Figure 21 Press Enter to Attempt Normal Operation Caution A failed self test may result in flawed operation and damage to the CT 2000 If the CT 2000 repeatedly fails the self test sequene call CANNON to arrange for a service call for the unit Following the self test th...

Page 30: ...y LCD screen and a simple keypad interface as shown in Figure 23 Figure 23 CT 2000 Front Panel The keypad on the front panel of the CT 2000 consists of fifteen keys White buttons numbers 0 through 9 A white button decimal point key A yellow button SET TEMP set temperature key A yellow button CAL TEMP calibrate temperature key A yellow button MENU key An orange button ENTER key The keys on the bott...

Page 31: ...is selected the instrument returns to the LCD temperature display screen without saving any changes These three buttons are the only options available when the Cold Start routine is begun SET TEMP CAL TEMP and MENU SET TEMP allows user to enter the desired bath temperature setting See details below CAL TEMP allows user to recalibrate the temperature sensing mechanism See section Calibrating the CT...

Page 32: ...ution Extreme temperatures or variability in the temperature of the coolant liquid may adversely affect the CT 2000 temperature control Note If a temperature is entered that is outside the operational temperature range of the CT 2000 a RANGE ERROR message appears on the LCD screen To correct this error press ENTER and follow the prompts to enter correct data When the CT 2000 is controlling tempera...

Page 33: ...st temperature 2 When the CT 2000 indicates that the instrument is controlling at the desired temperature place the thermometer in the bath and wait for the temperature reading to stabilize at least 10 minutes 3 Press the CAL TEMP key and enter the thermometer reading up to three decimal places subject to the following parameters a A decimal point may be included as an entry b The entered temperat...

Page 34: ...n corresponding to every temperature integer This calibration adjustment value for the bin is effective at all temperature ranges within 0 5 degrees of the temperature integer The CT 2000 combines user calibration input with readings obtained by the temperature probe and data from the general bath offset a protected menu option which is preset at the factory by Cannon Instrument Company see the ME...

Page 35: ...Fahrenheit and vice versa To switch from one unit of measure to another press the MENU key press 1 and press ENTER Keypad Sequence MENU 1 ENTER Bath Temperature Offsets To select a Bath Temperature Offset function first press the MENU key then press 2 and press ENTER Keypad Sequence MENU 2 ENTER The Bath Temperature Offset option when selected displays two sub menus Clear Bins Clears all user inpu...

Page 36: ...e the offset values are cleared they cannot be restored The instrument may require recalibration for all offsets to produce reliable data General Bath Offset The General Bath Offset is a protected function of the CT 2000 This option is a global adjustment which is made at the factory by CANNON In rare instances when this setting may need to be altered the adjustment should be made in consultation ...

Page 37: ... 4 19 2k 5 38 4k Keypad Sequence MENU 3 ENTER 1 ENTER Input speed choice 1 5 ENTER MODE The MODE keypad option permits RS 232C or RS 485 communication options The CT 2000 is equipped with a full duplex RS 232C point to point interface as well as a half duplex RS 485 network interface Commands and Queries may be sent to the CT 2000 via either interface Responses and Reports may be received by the m...

Page 38: ... point RS 232 environment with or without timed interval reports is 2 ENTER If the CT 2000 is configured to operate in a point to point RS 232 environment the Communication Mode message appears on the LCD when the RS 232 option is enabled as shown in Figure 27 Figure 27 Communication Mode Display The last line on the LCD 3 Config Reports indicates that timed reports may be utilized and the present...

Page 39: ...d bath temperatures if the CT 2000 is configured in the point to point mode of operation Otherwise the REPORTS DISABLED message appears on the LCD and report configuration options cannot be accessed until the point to point mode is resumed Full Duplex point to point Connections The RS 232 interface is furnished for a direct connection between the CT 2000 and one computer A DB 25 connector on the r...

Page 40: ...es must be preceded by the forward slash and the selected address 0 9 or A F Commands are identified with the letter C and Queries are identified with the letter Q these identifiers follow the address and precede the command or query information All Commands or Queries must end with a carriage return ENTER For examples of CT 2000 command and query language consult Table 3 on the following pages Do...

Page 41: ...the bath in Celsius mode for all temperature references An immediate response of command DCYES is returned or if command is unrecognizable then ERROR is displayed For example if this command is sent to a CT 2000 with an address of 1 1CDC the response may be 1CDCYES DF None Display all temperatures in F on LCD and in all reports This command places the bath in Fahrenheit mode for all temperature re...

Page 42: ... the argument in C or F This command performs immediately and there is no response This is usually used prior to sending SB type commands In all cases it should end with an EE type command For example if this command is sent to the CT 2000 with an address of 9 9CCBC the response may be 9CCBCYES SB C F Set the calibration offset Bin for the specified whole degree temperature as defined for C or F w...

Page 43: ...s in the first column followed by the time elapsed since the last affected temperature One space and then a C or F to designate the temperature scale followed by at least one space and then one or two digits to indicate hours followed by a colon two digits for the minutes a decimal and two digits for the seconds This is followed by at least one space and then the desired temperature to the thousan...

Page 44: ...ration the bath may be non operational Consult Table 4 for assistance in troubleshooting your CT 2000 If the following table fails to resolve the difficulties call your local CANNON representative for assistance Table 4 Troubleshooting Causes and Solutions Problem Possible Cause Solution Bath does not appear to have power Power cable is not connected to outlet or connected to rear electrical drawe...

Page 45: ...fluid is too viscous at the desired temperature the stirring will be inadequate resulting in poor control Stirring motor or impellor is not operating properly Check stirring motor and impeller Faulty RTD probe Remove control RTD probe plug and check resistance with an ohmmeter apx 100W at room temperature Bath top surface temperature is too high Defective fan Check cooling fan on rear panel and in...

Page 46: ... Fluorescent lamp 27 1310 Laminated safety glass 27 1320 Plate glass 25 3190 Over temp probe 27 2280 Ballast Solid State 27 5110 Front bath cover with round holes 27 5250 PTFE coated baffle white 27 5260 Cooling coil SS 27 5270 Heater 700W 120V 27 5271 Heater 400W 120V 27 5290 Heater 400W 240V 27 5291 Control Probe RTD 100 27 8037 Level Switch 27 5410 1 Motor Stirrer 120V 27 6100 Motor Stirrer 240...

Page 47: ...mage to plant personnel equipment or products directly or indirectly resulting from the use or misuse of any product Representations and warranties made by any person including dealers and representatives of the Company which are inconsistent in conflict with or in excess of the terms of this warranty shall not be binding upon the Company unless placed in writing and approved by an officer of the ...

Page 48: ...ion __________ 2139 High Tech Road State College PA 16803 USA Required Information The following must be included The Return Authorization number RA The name and telephone number of the person at your company to contact regarding the product Shipping and billing instructions for the return of the product to your location A detailed explanation of the reason for the return If the product is not cov...

Page 49: ...mately the same length in the coupling You can test for shaft run out and impeller blade alignment by placing the motor on a soft surface with impeller facing up Connect the motor to the appropriate AC power source and observe the impeller and shaft If run out is severe the motor will vibrate and the shaft will flutter noticeably The impeller will appear blurred if the impeller blades are not in t...

Page 50: ...htly removed from the first crayon mark 7 If the mark appears at the same side of a shaft as the first mark and is about the same length the bending was not great enough to alter the condition and should be repeated with more force applied If the mark has shifted to the opposite side the force was too great and the shaft must be bent back with less force to correct the situation This is a trial an...

Page 51: ...ity Temperature gradients in the bath are less rapid with a high heat capacity With the exception of water most choices for bath fluids will have about the same heat capacity Volatility A liquid with a low vapor pressure will require more frequent replenishment Further rapid evaporation at the bath surface produces a cooling effect making temperature control more difficult Because no single fluid ...

Page 52: ...y Water can be used at temperatures close to the boiling point but water replenishment to offset evaporation becomes a nuisance and exposure to the hot vapor can make working above or near the bath uncomfortable Also it may be difficult to establish optimum control at elevated temperatures because of the rapid cooling resulting from surface evaporation Refined White Oils Refined white oils paraffi...

Page 53: ......

Page 54: ...CANNON INSTRUMENT COMPANY 2139 High Tech Road State College PA 16803 USA 800 676 6232 814 353 8000 Fax 814 353 8007 sales cannoninstrument com cannoninstrument com ...

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