Cole-Parmer Instrument Company
Contents
1. 2 07 Verifying each LED illuminates for mL COPY and SEC press the DISPense copy key until none of the LED s is on 2 08 Turn the drive OFF While holding the MODE switch turn the drive ON Set the input to 4 20mA 115 Vac or 0 20mA 230 Vac with the increment or decrement v keys Press the MODE switch Set the output to 4 20mA 115 Vac or 0 20mA 230 Vac with the increment or decrement v keys Press the MODE switch to get to the INT mode Turn the drive OFF then ON after a wait of at least three seconds Verify the INT and RPM indicators remain lit 2 09 Press START and then press until display reads the maximum setting Using the hand tach verify motor runs within the specified tolerance NOTE Motor should be rotating CW when viewed from the front 2 10 Press v until display reads the minimum setting Using the hand tach verify motor runs within the specified tolerance Drive Maximum Speed Minimum Speed Setting Setting 75211 30 35 3600 3618 3582 51 40 45 2 11 Press and hold the PRIME key while noting that the drive runs at full speed 2 12 Press the Remote Start Stop NEMA drives only or foot switch Verify that the drive runs as long as it is held Press STOP START 2 13 Press the Remote Prime switch NEMA drives only Verify that the drive runs at full speed as long as it is held 2 14 Turn the controller OFF and unplug it from the variac KRERERERERERERERERRERERERE TESTS COMPLETED2. e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company gu T00 VN CRT e UmUG S ooms Chi 40mv Ch3 200mV amp Ch4 2 00 VON Tek 10 0kS s 9 Acqs 4r 15 Mar 1999 11 45 37 gu Tova CRT e UmUG S ooms Chi 40mv Ch3 200mV Chd4 2 00 VO amp 15 Mar 1999 11 44 21 Tek B 10 0KS s 8 Acqs g AF a DNI wu i 00 Vv Ch2 10 0mV M5 00ms Chi 7 40mV Ch3 200mV Ch4 2 00 VOS 15 Mar 1999 11 41 26 Med Speed amp Low Torque Med Speed amp Med Torque Med Speed amp High Torque T oova cn 10 0mVG Ms 00ms Chi 40mV 15 Mar 1009 Barrington IL U S A 60010 2392 arnant com Cole Parmer Instrument Company Manufactured by Barnant Company High Speed amp Low Torque Tek 10 0kS s 8 Acqs f i High Speed amp Med Torque 35 44 MA dv Eha gone OOMS CRIT CAOmU 15 Mar 1999 Tek 10 0kS s 20 Acqs dH Ses High Speed amp y High Torgue f E fi s chi T 00 V amp Chia 10 0mvo M5 00ms Chi 7 d0mV 15 Mar 1999 Ch3 200mV Ch4 2 00 VOR a Speed feedback is provided by a slotted encoder wheel and optical sensor The IR output of the sensor diode is interrupted by slots in an encoder wheel attached to the motor shaft The IR sensor output is filtered by C37 C67 and C66 The offset is removed by C68
3. 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company Phase Controlled Rectifier Speed Control The variable speed drive employs a phase controlled rectifier bridge to vary the power applied to the DC motor The bridge will only conduct current when the power line voltage exceeds the voltage across the motor terminals The power to the motor can therefore be controlled by varying the point at which the bridge starts to conduct relative to the phase of the line voltage The phase angle at which the bridge starts conducting is controlled by a speed regulator loop Synchronization to the power line is provided by a differential line cross comparator circuit U12A Current and voltage waveforms for both the line and motor are shown for various load and speed variations D32 D33 Q9 and Q10 form the main power bridge for the motor D32 and Q10 conduct during one half of the line cycle while D33 and Q9 conduct during the other half Reversals of the line voltage force the conducting SCR to commutate off Since switching is at zero voltage during line cross there is no flyback pulse from the motor to clamp Opto triacs U14 and U15 isolate the power line from the control circuits RV1 and RV2 provide transient voltage protection from power line surges caused by other power conversion equipment and lightning strikes RV1 and RV2
4. ASSOCIATED DOCUMENTS ueu GR OD RR LL FT Dua Sut nd 25 INTRODUCTION Service for this product is performed at three levels the customer distributor COLE PARMER and factory depot repair This manual describes dis tributor COLE PARMER service procedures Page 2 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company Customer service procedures are described in the operator s manual Customers are encouraged to perform service as described in the operator s manual as well as in special circumstances where special skills and safety are not considerations To use this manual begin with the troubleshooting section to isolate the fault to a replaceable part The functional description and check out procedure sections are also helpful in determining the faulty part Distributor COLE PARMER repair is limited to replacement of modules as detailed in the replacement parts list section The repair procedures section details disassembly and assembly procedures After repair the product should be calibrated and checked for proper performance Please refer to the operator s manual for A Applications Data B Product Description C Installation D Setup E Operation F User Calibration G User Troubleshooting amp Mainte
5. http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company ERROR 6 THROUGH 9 DISPLAYED 1 turn unit off then on and or press any key to reset if any error numbers reappear replace main PCB assy NO DISPLAY OR GARBLED DISPLAY 1 display connector not seated reseat ribbon cable J3 2 display failure replace display PCB assembly 3 defective main PCB U1 replace main PCB assembly IMPROPER KEYPAD OPERATION 1 keypad failure replace keypad assy 2 defective main PCB PROM replace PROM main PCB assembly FOR ADDITIONAL INFORMATION REGARDING YOUR UNIT PLEASE REFER TO THE OPERATOR S MANUAL REPAIR PROCEDURES TO DISASSEMBLE UNIT PROCEED AS FOLLOWS A Disconnect AC power B Remove the three console drives pan head screws on each side of the unit s cover On NEMA drives loosen the four captive screws in the cover C Lift off cover assembly TO REASSEMBLE UNIT PROCEED AS FOLLOWS Page 17 of 24 le B REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company A Slide on cover assembly B Install the three console drives pan head screws on each side of the unit s cover On NEMA drives tighten the four captive screws in the cover TO REPLACE MOTOR ASSEMB
6. and over opposite corners of the firmware chip Squeeze the handle to extract the chip Page 18 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company C Making sure that the new firmware chip orientation is the same as that of the old place the replacement firmware chip in the socket Keeping the chip level gently squeeze the chip into the socket until it is fully seated D Drive setup information is in a separate EEPROM so that the drive will not need recalibration An Err 7 message will initially appear that can be cleared by pressing STOP START L a FT ur P Bevel n C3 py rtr f LE pann i tik z z F1 z r1 E B N u Ut u un un Haga E EELEELEEPEB HE yy gy E ua O fo Jm 4 TO REPLACE MAIN CONTROL PCB ASSEMBL Y A Note that the correct firmware is installed Follow REPLACE PROM the steps outlined in TO B Note that SW1 on the Main Control PCB is set for the correct line voltage 115 V 230 V C Note wiring of Main Control PCB as follows 1 BLUE of power line to J2 2 BROWN of power line to J4 BLACK of drive motor to J5 RED of drive motor to J6 O 60 Ribbon cable from Display PCB to
7. are in parallel with the transformer T1 primaries which are selected between 115 Vac and 230 Vac operation with a line voltage selector switch SW1 Common mode choke L3 and line to ground capacitors C52 and C54 filter out conducted common mode noise while across the line capacitors C50 and C51 filter out conducted differential noise A dynamic brake resistor attached to the contacts of the ON OFF relay K2 brings the motor to a stop before reversing to avoid damage to the motor or drive P A 3 age 6 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company ILLE e L i Low Torque al ee ee er ee BE 1 00Vv Ch 10 080V C Ms 00ms Chi 7 40mV 15 Mar 1999 Tek 10 0kS s 7 Acqs up RS m ate at zm i Med Torque al E Ed NE a bnn su T 00 VV Cn 10 UmVc Ms 00ms Chi J 40mV 15 Mar 1999 Ch3 200mV Ch4 2 00 VO amp 11 40 00 Tek 10 0kS s 8 Acgs EEF zt WA ik L High ae Me a Die De TOO Vw nio T0 ov Ms ooms Chi J 40mV 15 Mar 1999 gin 3 200mV Chd4 2 00 VOR Gaede Pa 7 Ss ge 7 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax
8. kkkkkkkkkkkkkkkkkkkkkkk P rs age 23 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company ASSOCIATED DOCUMENTS Current copies of the following documents are required for servicing the drive Main PCB Schematic E 2229 Main PCB Assy Dwg E 2231 Console Drive Display PCB Schematic D 2972 Modular Drive Display PCB Schematic D 3035 Operator s Manual 75211 30 35 A 1299 0853 75210 40 45 A 1299 0854 The following documents may be of help and are included for reference Chassis Assy Dwg 75211 30 35 5745 75210 40 45 5739 Cover Assy Dwg 75211 30 35 5744 75210 40 45 5740 Page 24 of 24 REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com
9. to be performed other than set ups performed by the customer Calibration of the Analog I O requires a special calibration fixture at the factory Additional technical specifications are available in the unit s OPERATORS MANUAL FUNCTIONAL TESTS 1 00 Test equipment required 1 01 Contact Tachometer C P Cat 8203 50 or 8203 80 1 02 Variac 115 VAC 60Hz or 230 VAC 50Hz appropriate for unit being tested 1 03 Foot switch C P Cat 7595 42 or Remote Control C P Cat 7592 83 2 00 TESTING 2 01 Plug controller into the variac set to 115 volts ac or 230 volts appropriate for the unit under test 2 02 Turn the controllers power switch to the ON position Verify that all LED s display segments and decimal points illuminate 2 03 Verifying each LED illuminates for INT mA and V press the MODE switch to get to the INT mode 2 04 Select any tubing size not RPM then press the FLOW key The Page 22 of 24 c Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company displayed value should change 2 05 Press the CAL key Note that the annunciator LED next to the key is flashing Press the Gear Set key to exit out of CAL 2 06 Verifying the LED for each tubing illuminates press the tubing SIZE switch to get the RPM display
10. 53 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company Power Supply The primary power supply for the system is a 115 VAC or 230 VAC 15 50 or 60 Hz wall outlet The rear panel power input module for the detachable power cord contains the fuse Switch SW1 on the Main PCB selects between 115 and 230 Vac operation so that the same PCB can be used for both voltages An unregulated 24 Vdc supplies power to the analog inputs and outputs to the relays K1 through K4 and to the 5 Vdc switching regulator U13 which supplies power to the rest of the control circuits The unregulated 24 Vdc is generated by filtering C49 a full wave rectified D22 D25 center tapped secondary winding output of T1 A double isolated transformer T1 is required to avoid ground loops and for safety as the remote inputs and outputs might provide an electrical connection to an energized surface 5 V Switching Regulator Shown below is a schematic representation of the U13 LM2594 5Vdc switching regulator circuit In the figure C1 corresponds to C49 L1 to E24 C2 to C53 and C62 D1 to D27 L2 to L4 and C2 to C55 and C56 The remaining components are internal to U13 Circuit waveforms are shown in the figure following SWITCH O1 ON FOR Ton QUT OF TSECONDS A T cw EH R2 iU al vI dc CONTROL VOLTAGE PROPORTIONAL TO FEEDBACK CONTROLLEO SQUARE WA
11. Cole Parmer Instrument Company Manufactured by Barnant Company SERVICE MANUAL MODELS 75211 30 Console 115 Vac 60 to 3600 r min 75211 35 Console 230 Vac 60 to 3600 r min 75211 40 NEMA Modular 115 Vac 60 to 3600 r min 75211 41 Controller only 75211 42 Motor only 75211 45 NEMA Modular 230 Vac 60 to 3600 r min 75211 46 Controller only 75211 47 Motor only PROPRIEARY Information contained in this manual is proprietary to the BARNANT COMPANY division of COLE PARMER INSTRUMENT COMPANY INC No reproduction for other than the intended use of maintaining the product described herein is permitted without the permission of BARNANT TABLE OF CONTENTS Page 1 of 24 ee J REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company INTRODUCTION Mm 3 SAFETY CONSIDERATIONS seiscpinvsseupcreetoeecncninaa nn beer eng o SELBE LLL pug uuo p ede 4 FUNCTIONAL DESCRIPTION eo aidtitesiadte ta OI nate eee te tau ad nas 5 THEORY OF OPERA TON I p PERSE SERERE ERPNEREOMUESEBEL EROR UD ER CURED AC 6 TROUBLESHOOTING issia re 15 REPAIR uie eizplic C 18 REPLACEMENT PARTS LISTING i ni Ru qua due eee 21 CALIBRATION O O CNAU FN IN EF RO A EN RR 22 FUNCTIONAL TES TO O dd ANDI E EON 23
12. J3 Cable from Motor Encoder to J9 Rear Panel DB 15 ribbon cable to J11 287I Page 19 of 24 GREEN YELLOW from Chassis Ground to J18 Not on some 115 Vac drives Two BROWN of Dynamic Brake Resistor to J16 amp J17 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company 10 BLACK from AUX OUT 2 to J7 11 WHITE from AUX OUT 2 to J8 12 RED from AUX IN 1 to J1 13 GREEN from AUX IN 1 to J10 14 BROWN from AUX OUT 1 to J14 15 BLUE from AUX OUT 1 to J15 TO REMOVE DISPLAY PCB A Remove 4 screws console drives 3 on NEMA modular drives holding the PCB to cover B Remove ribbon cables The ZIF sockets release the keypad flex tails by sliding out TO REPLACE DISPLAY PCB A Replace cables The ZIF sockets secure the keypad flex tails by sliding in Ribbon Cable 26 conductor from Main Control PCB J3 LED 11 conductor flex tail from Keypad J2 Switch 7 conductor flex tail from Keypad J3 Shield ground flex tail from Keypad Secured and grounded to Display PCB with screw 1 2 3 4 xe eS ws B Secure Display PCB with 4 screws console drives 3 on NEMA modular drives TO REPLACE KEYPAD A Follow the steps outlined in REMOVE DISPLAY PCB B Peel keypad from cover C Affix new
13. LY Console Drives Only A Remove BLACK motor lead from J5 B Remove RED motor lead from J6 C Remove Motor Encoder Cable from J9 D Remove top nut holding GREEN ground wire to the chassis E Remove four bolts holding motor to chassis F Replace motor and tighten bolts Attach leads and encoder cable TO REMOVE MAIN CONTROL PCB ASSEMBLY A Console Drives Remove two screws holding heat sink assembly to chassis Remove screw from PCB Card Guide Remove PCB Card Guide NEMA Modular Drives Remove two nuts holding heat sink bracket to chassis Remove two screws holding PCB to chassis Remove two screws holding heat sink assembly to heat sink bracket B Remove all cables and wires from PCB TO REPLACE PROM NOTE The part is in a 44 pin PLCC socket but requires an extraction tool to avoid damage to the socket and firmware chip Recommended extraction tools are the OK Industries EX 5 and the AMP 821981 1 NOTE To avoid ESD damage to the firmware chip leave the chip in its protective carrier until it is to be inserted Wear an earth grounded anti static wrist strap while working on the drive A The socket holding the firmware is located in the upper right hand corner of the Main PCB and is labeled X1 on the PCB silkscreen Please note that the beveled corner of the firmware chip will be in the lower right hand corner of the socket See Illustration B Place the extraction tool so that it is firmly seated in the socket
14. U4D while D9 and D10 and resistor dividers R26 through R33 protect A D U5 from over voltages A PWM signal proportional to motor speed from pin 25 of the microprocessor U8 is low pass filtered by a three pole Bessel filter with a 10 Hz bandwidth formed by U4B The output is used for both an external 0 10V signal and a reference input for a voltage to current converter formed by U9A and U4A Emitter follower Q2 permits the output voltage to reach OV The output voltage is converted into a current by voltage follower U9A high gain transistor buffer Q6 and resistor R97 The open loop gain of U4A forces the voltage drops across R112 and the parallel combination of R113 and R98 to be equal The currents through the resistor network are therefore proportional to the relative resistor values Because of the high input impedance of U4A and the high gain of the Q3 and Q5 transistor combination the external 4 20mA signal is the current through the parallel R113 and R98 resistor network Contact Closure Input AUX IN Remote Start Stop amp Prime Resistors R11 to R13 and R72 are pull ups for the contact closure inputs Capacitors C4 to C7 provide low pass filtering for the signals Diodes D12 D14 D16 and D18 and resistors R86 to R93 R149 to R151 and R46 protect against over voltage transients Page 11 of 24 SO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 70
15. VE NRR zy VARIABLE WIDTH INPUT RI R2 r TURN N SIGNAL Page 12 of 24 Basic step down switching regulator ISO E REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company Waveform B is the voltage at point A in the schematic It is at Vi for the time Q1 is closed Ton and at ground for the time Q1 is open T Ton The filter L2C2 averages out the Vi peak to peak ripple voltage to produce a constant dc output voltage V whose value is given by Vo Vin Ton T The LM 2594 regulator continually adjusts Ton to give a fixed 5Vdc output The period T remains fixed at a switching frequency of 150 KHz The ripple voltage on V is determined by the choice of L2 and C2 Waveforms C through F show currents through the switch Q1 diode D1 inductor L2 and capacitor C2 The average value of current through the inductor L2 must always equal the dc load current The current through L2 ramps upward through Q1 when Q1 is closed and ramps downward through D1 when Q1 is open The inductor current ramp must not be allowed to go to zero placing a minimum limit on the allowable load current When Q1 is closed there is a constant voltage across L2 equal to Vi Vo Since the voltage across and inductor is given by V L di dt the ma
16. and level shifted by R125 and R127 U12C compares the sensor output against the reference level formed by R94 and R126 R109 provides hysteresis Page 9 of 24 qo REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company for noise filtering Additional filtering is provided by C65 and C36 Transistor Q4 provides a buffered tachometer signal to the user The encoder pulses from the comparator output are counted by the microprocessor to determine the motor speed Schmitt trigger U2E speeds up the slew rate of the comparator U12C output The difference between the set speed and the motor speed is used by the microprocessor to determine the required phase angle to fire the output SCR s The interrupt service routine for the line cross interrupt reads the number of encoder pulses stored in the pulse accumulator register PACNT resets the PWM output updates the copy dispense counter and sets the SCR firing angle The speed error speed err is the difference between the speed setpoint control ppi and the actual speed actual ppi derived from the number of pulses stored in the pulse accumulator register between line crosses The speed error speed err is integrated intg err speed err 64 intg err 1023 The integrator outpu
17. gnitude of the peak of the current ramp is given by AlL Vin Vo Ton L2 P A 3 age 13 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company ps l STATUS gion oorr avon arorr a l Vin QI EMITTER Ton Ton Ton Teri 8 D f p denar CURRENT IN l 2 CURRENT AT NOMINAL LEVEL LOAD I load CURRENT IN DI a ee te ee pr CURRENT IN E2 CURRENT LEVEL CURRENT INTO C2 Ap LM LAM 0 B M em ef fF tin AT MINIMUM o LOAD CURRENT 1N DI AT MINIMUM DP D 0 amp LOAD 1 CURRENT IN L2 load rin dp AT MINIMUM LOAD gt i D NOTE Tiogdtmin NOTE dc LOAD CURRENT SHOULD NOT BE SHOULO NOT BE PEAMITTED PERMITTED TO GO TO FALL TO VALUE BELOW BELOW WHICH f RUNS DOWN TO Al _ Voll Ton ZERO BEFORE A NEW Ol 27D TURNS ON Critical waveforms in the step down switching regulator TROUBLESHOOTING Repairs on this unit are confined to either the units Main PCB assembly and or drive motor assembly Page 14 at ge 14 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parme
18. keypad to cover D Follow the steps outlined in REPLACE DISPLAY PCB REPLACEMENT PARTS LISTING The following is a list of stocked main control PCB assemblies firmware keypads and motor drive assemblies for all indicated models MODEL PCB ASSY PROM X1 KEYPAD MOTOR ASSY Page 20 of 24 e 5 REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company 75211 30 E 2231 0002 5750 5679 D 3078 0001 75211 35 E 2231 0002 5750 5679 D 3078 0002 75211 40 E 2231 0002 5753 5695 75211 42 75211 45 E 2231 0002 5753 5695 75211 47 The following list is commonly used parts applicable to the above model LISTINGS DESCRIPTION BARNANT part Detachable power cord 115 Vac USA B 3115 C P 50001 68 Detachable power cord 230 Vac EUROPEAN B 2938 C P 50001 70 Display PCB Assy Console Drive D 2974 Display PCB Assy Modular Drives D 3224 Page 21 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company CALIBRATION Due to the design of this product there are no calibrations and or adjustments
19. nance H Accessories l Specifications SAFETY CONSIDERATIONS Servicing must be performed only by personnel trained and skilled in the methods of troubleshooting and repair of electromechanical products Use of procedures other than those described in this manual may result in a safety hazard to service personnel and or customers AN ge 3 of 24 Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com REGIS Cole Parmer Instrument Company Manufactured by Barnant Company WARNING High voltage is present inside the unit when servicing any component of this unit be absolutely certain that all power to circuitry is removed If any functional checks are to be performed while power is applied and chassis is disassembled care must be exercised AN CAUTION A This is a line operated device and is not isolated from ground Powering the device under test using an isolation transformer is strongly recommended B Do not inadvertently short any part of the printed circuit card to ground as severe damage will result FUNCTIONAL DESCRIPTION The Masterflex digital pump drive dispensers deliver accurate amounts of fluids at adjustable flow rates The use of a microprocessor with an optical shaft encoder allows the user to obtain consistent flow rates with excellent speed regulation The unit fea
20. r Instrument Company Manufactured by Barnant Company Where possible swap known good parts to localize and isolate the problem The following is a list of possible problems and remedies VERIFY AC POWER IS OPERATIVE MOTOR WILL NOT RUN DISPLAY DOES NOT LIGHT 1 fuse blown replace fuse 2 power cord not connected properly check amp replace 3 AC power switch failure replace switch assembly 4 unit connected to dead outlet verify supply is HOT 5 power supply failure replace main PCB assembly UNIT BLOWS FUSES 1 motor drive failure check using known good motor 2 defective main PCB replace main PCB assembly 3 wrong fuse installed check fuse rating MOTOR WILL NOT REVERSE 1 defective main PCB replace main PCB assembly 2 defective keypad replace keypad MOTOR WILL NOT RUN DISPLAY LIGHTS 1 defective keypad replace keypad 2 defective main PCB replace main PCB assembly 3 defective motor assembly replace motor assembly 4 dirty encoder switch clean switch amp disk 5 wrong operating MODE MODE set to INT for front panel operation mA or V for remote operation LOSS OF SPEED CONTROL OR IMPROPER SPEEDS 1 defective main PCB replace main PCB assembly 2 dirty encoder switch clean switch amp disk Page 15 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnan
21. t intg err and the speed error speed err are then used to calculate a new SCR firing angle fire cnt speed err 2 intg err 1024 BUZZ CNT BUZZ ONT is a constant minimum count 1365 needed to get the motor turning Once calculated the SCR firing angle fire cnt is subtracted from the average count of the processor clock per line cross avg clks This sum is then added to the existing counter value TIC2 to generate the value of the counter at the time the counter output fires the SCR new cnts CPU Section The CPU U8 for the system is a Motorola MC68HC11D0 The CPU is operated from a crystal Y1 at 9 8304 MHz The RAM ROM data latch and expanded I O for the system are provided by a WSI PSD312 mounted in a socket X1 Non volatile memory for calibration and setup information is provided by the EEPROM U6 which has a serial interface to the CPU The 5V digital supply level is monitored by U7 to control the power up down reset of the CPU and the RAM ROM latch in the WSI PSD312 IC The CPU contains an independent on chip watchdog timer Display Keypad The digital drives use a 4 character 7 segment light emitting diode LED display for speed and flowrate information Individual LED annunciators on the keypad show setup information Display segments and LED annunciators are matrix addressed by a display driver chip U1 which has a serial interface to the CPU Current through the LED s is set by R9 while resistors R1 thro
22. t barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company NO REMOTE OPERATION 1 defective main PCB replace main PCB assembly 2 external cable not connected check replace properly DISPLAYED ERROR CODES ERR Bad calibration run ERR1 No encoder pulses Motor undershoot ERR2 Motor overspeed Motor overshoot ERR3 Not Used ERR4 Bad PROM checksum program halted ERR5 Motor overload ERR6 Bad zero crossing detector or crystal ERR7 Bad EEPROM data using operator parameter default values ERR8 Bad EEPROM data using A D calibration default values ERR9 EEPROM write verify error LOSS OF SPEED CONTROL ERROR 1 DISPLAYED 1 motor undershoot no tubing in pump press any key to clear error 2 defective main PCB encoder circuit replace main PCB assembly 3 defective motor encoder assembly replace motor assembly MOTOR IMMEDIATELY RUNS WHEN POWER IS APPLIED ERROR 2 DISPLAYED 1 motor overshoot no tubing in pump press any key to clear error 2 defective main PCB power bridge replace main PCB assembly ERROR 4 DISPLAYED 1 bad PROM replace PROM MOTOR OVERLOAD ERROR 5 DISPLAYED 1 pump jammed clear obstruction turn drive off then on Page 16 of 24 ISO B5 mn Yr Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site
23. tures permanently stored calibration data or empirical values which are user entered that are semi permanently stored BLOCK DIAGRAM Varm larm T wref Page 4 of 24 m ISO Js REGISTERED Barnant Co 847 381 7050 e mail barnan Cole Parmer Instrument Company Manufactured by Barnant Company As shown on the Block Diagram the motor pump speed w is a function of the applied torque T acting on the rotor inertia 1 sJ The torque in turn is proportional Kt to the armature current larm which is produced by the difference between the applied armature voltage Varm and the motor back EMF across the armature impedance 1 Ra s La The motor back EMF generated in the armature windings by the motion of the rotor magnetic field is proportional Kw to the motor speed The applied armature voltage Varm is the amplified Kwreg error signal between the speed reference command wref and the motor speed wfdbk The motor speed signal Kfdbk is supplied by the drive to the microprocessor using an optical sensor tachometer mounted on the motor The unit contains two P C Boards The Main Control Board is mounted vertically on the left side of the unit in the console drives and parallel to the chassis base in the modular drives The Main Control Board has four main areas the microprocessor and its related circuitry the remote I O the motor power bridge and control and the power supply The Display Board containing
24. two dual 7 segment LED displays and mounted on the front of the enclosure is connected via a flat ribbon cable to the control board The membrane keypad which also contains the annunciator LED s is secured to the front of the enclosure with pressure sensitive adhesive There are three flat flex tails switch LED s and static shield ground connecting the keypad to the Display Board THEORY OF OPERATION Motor The pump is driven by a brush commutated DC motor The motor converts electrical energy into mechanical energy through the interaction of two magnetic fields One field is produced by a permanent magnet assembly attached to the motor shell the other field is produced by an electric current flowing through the armature windings These two fields produce a torgue that causes the armature to rotate As the armature turns the current is switched commutated among the windings to produce a continuous torgue output The back emf is an induced voltage produced by the relative motion between the permanent magnet field and the armature windings This allows simple speed and torgue control as the speed is proportional to the applied voltage while the torgue is proportional to the current through the motor On the peristaltic pump drives the speed of the motor is reduced through a system of gears to provide the speed required by the pump Page 5 of 24 ISO REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392
25. ugh R8 limit power dissipation through the driver chip Ferrite beads on the output lines filter out EMI Matrix addressed keypad Page 10 of 24 cy B REGISTERED Barnant Company 28W092 Commercial Avenue Barrington IL U S A 60010 2392 847 381 7050 800 637 3739 847 381 7053 Fax e mail barnant barnant com Web Site http www barnant com Cole Parmer Instrument Company Manufactured by Barnant Company switch closures are read into an 8 bit parallel port on the WSI PSD312 chip RC network R47 through R62 and C17 through C24 provide EMI filtering AID Converter The A D converter U5 is a 11 channel 10 bit successive approximation converter with a serial interface to the CPU The 5V supply voltage is filtered by R34 and C12 and used as a reference voltage for the A D The A D is self clocking with an end of conversion EOC signal to trigger a CPU interrupt The address of the next channel to be converted is clocked in as the previous conversion result is being clocked out Normally unused A D channels are used to monitor the remote contact closure input status Analog I O 0 10V amp 4 20mA Speed can be controlled through either an external 0 10V or an external 4 20mA signal The current signal is converted into a voltage for the A D converter U5 by R15 Differential buffer amplifiers U4C Current and U4D Voltage eliminate errors caused by common mode voltages Clamp diodes D1 and D3 protect U4C D2 and D5 protect
Download Pdf Manuals
Related Search