Keithley 2001-TCSCAN Instruction Manual Download

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Contains Operating and Servicing Information

Model 2001-TCSCAN

Scanner Card

Instruction Manual

Summary of Contents for 2001-TCSCAN

Page 1: ...Contains Operating and Servicing Information Model 2001 TCSCAN Scanner Card Instruction Manual...

Page 3: ...uentially When a new Revision is created all Addenda associated with the previous Revision of the manual are incorporated into the new Revision of the manual Each new Revi sion includes a revised copy...

Page 4: ...sent A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring Users of this product must be protected from electric shock at all times The responsi...

Page 5: ...y before performing the indicated procedure The CAUTION heading in a manual explains hazards that could damage the instrument Such damage may invalidate the warranty Instrumentation and accessories sh...

Page 6: ...eight 283g 10 oz 2 Channels 5 and 10 maximum power 0 25 VA maximum factory installed 120 5 1 4W resistors User may replace with jumper See note in manual for complete instructions 3 Channels 5 and 10...

Page 7: ...onal accessories 1 3 2 Card Connections and Installation 2 1 Introduction 2 1 2 2 Handling precautions 2 1 2 3 Connections 2 1 2 3 1 Card configuration 2 2 2 3 2 Card connectors 2 3 2 3 3 Wiring proce...

Page 8: ...s 3 11 3 8 2 RTD temperature measurements 3 13 3 8 3 Using RTD and thermocouple sensors together 3 14 3 8 4 IEEE 488 programming example temperature measurements 3 15 3 9 Basic front panel operation 3...

Page 9: ...re 4 11 4 5 Special handling of static sensitive devices 4 13 4 6 Principles of operation 4 13 4 6 1 Block diagram 4 13 4 6 2 Relay control 4 14 4 6 3 Switching circuits 4 14 4 6 4 Power on safeguard...

Page 10: ...Figure 2 9 Card installation 2 11 Figure 2 10 2 pole output connections 2 13 Figure 2 11 4 pole output connections 2 14 3 Operation Figure 3 1 Models 2001 and 2002 front panel scanner controls 3 3 Fig...

Page 11: ...el isolation tests 4 9 Figure 4 5 Connections for channel to channel isolation tests 4 9 Figure 4 6 Connections for HI and LO terminal to chassis ground isolation tests 4 10 Figure 4 7 Calibration wit...

Page 12: ...s for the Model 2010 3 23 4 Service Information Table 4 1 Verification and calibration equipment 4 3 Table 4 2 Recommended troubleshooting equipment 4 14 Table 4 3 Troubleshooting procedure 4 16 5 Rep...

Page 13: ...he Model 2001 TCSCAN makes it well suited for both low and high signal levels Section 1 is arranged in the following manner 1 2 Features 1 4 Manual addenda 1 5 Safety symbols and terms 1 6 Specificati...

Page 14: ...nclude DMM temperature accuracy Note that Model 2001 TCSCAN scan temperature accuracy is specified down to 100 C For temperatures from 100 1 C and 200 C using type J K T or E thermocouples add an addi...

Page 15: ...e equivalent and include the following information Advise as to the warranty status of the scanner card Write ATTENTION REPAIR DEPARTMENT on the shipping label Fill out and include the service form lo...

Page 16: ...r card in the DMM outlines scanner card output connections and describes how to remove the card 2 2 Handling precautions To maintain high impedance isolation between channels care should be taken when...

Page 17: ...emperature measurements 4 pole paired channels are as follows Channels 2 and 7 Channels 3 and 8 Channels 4 and 9 Channels 5 and 10 CAUTION Do not attempt to pair channels 1 and 6 Possible damage to th...

Page 18: ...e plas tic shield by pressing in on the locking tab Swing the shield away from the circuit board Locking Tab Plastic Shield Input Output Connectors Reference Junction Sensor Reference Junction Circuit...

Page 19: ...the supplied test leads for scanner output connections Connect red leads to the output OUT A and OUT B HI ter minals and connect black leads to the output LO terminals See Figure 2 3 for details Dres...

Page 20: ...LO CH 5 HI LO CH 6 HI LO CH 7 HI LO CH 8 HI LO CH 9 HI LO CH 10 HI LO HI LO Note OUT B connections not required for 2 pole operation Figure 2 3 Output connections Cable Clamp Metal Clip HI LO CH 2 OU...

Page 21: ...ical thermocouple connections Note that thermocouples are connected to channels 2 10 and out put connections are taken from the OUT A terminals Thermocouples HI HI LO HI LO HI LO HI LO HI LO HI LO HI...

Page 22: ...ion can be used for the following types of measurements DCV ACV Frequency Channels 2 10 can be used with this configuration V HI LO V HI LO V HI LO V HI LO V HI LO V HI LO V HI LO V HI LO V HI LO Volt...

Page 23: ...limiting re sistors Unless the card is modified see paragraph 4 8 4 Pole connections Typical 4 pole resistance connections are shown in Figure 2 8 This general configuration can be used with channel p...

Page 24: ...st HI HI LO HI LO HI LO HI LO HI LO HI LO HI LO HI LO HI LO HI LO CH 2 CH 3 CH 4 CH 5 OUT A CH 6 CH 7 CH 8 CH 9 CH 10 OUT B 2001 TCSCAN Card HI LO LO To DMM Input Jacks HI LO To DMM Sense Jacks Figure...

Page 25: ...r wiring details 2 5 1 Scanner card installation Perform the following steps and refer to Figure 2 9 to install the card assembly in the DMM WARNING Turn off power to all instrumentation including the...

Page 26: ...Card Connections and Installation 2 11 Figure 2 9 Card installation Ejector Arms 2 Unlock card Lock card WARNING Installation or removal should be performed only by qualified service personel...

Page 27: ...LO black to SENSE LO See Figure 2 11 NOTE Be sure to select the rear inputs with the DMM front panel INPUTS switch when using the scanner 2 5 3 Scanner card removal Follow the steps below to remove t...

Page 28: ...Use this configuration for DCV ACV 2 wire 2 wire RTD Frequency Thermocouple A Models 2001 and 2002 Figure 2 10 2 pole output connections Input HI Input LO Out A HI Red Use this configuration for DCV...

Page 29: ...nse LO Out B LO Black Use this configuration for 4 wire ohms 4 wire RTD A Models 2001 and 2002 Input LO Out B HI Red Input HI Out A HI Red Out B LO Black Sense HI Sense LO Out A LO Black Use this conf...

Page 30: ...ure scan parameters and how to perform scanning 3 8 Temperature measurements Describes using the scanner card to make temperature measurements using themocouples and RTD probes Models 2000 and 2010 op...

Page 31: ...response to this query has two fields The first field identifies the presence or absence of expansion memory and the second field indicates whether or not the scanner is present as follows 0 Scanner...

Page 32: ...on is used only the relay for that one channel will be closed If a 4 wire function is selected both the selected channel relay and the matching relay pair will close For example closing channel 2 will...

Page 33: ...on to none CAUTION Four wire functions should not be used with channels 1 and 6 TMP function Similarly the TMP selection is valid only for channels 2 5 if the RTD temperature sensor is a 4 wire type I...

Page 34: ...ot be used with the Model 2001 TCSCAN These selections are intended for use with a different scanner card 3 4 4 Using SCAN to configure scan parameters and start scanning Once the internal or external...

Page 35: ...XIT to stop scanning To disable scanning while in progress press the EXIT key 3 4 6 Manual scanning The and keys can be used to manually scan through channels In order to use this feature first close...

Page 36: ...RTD TYPE name RZERo NRf ALPHa NRf BETA NRf DELTa NRf TCouple TYPE name RJUNctionX RSELect name SIMulated n REAL TCOefficient n OFFSet n ACQuire Commands to configure measurements Select function TEMP...

Page 37: ...initiation Trigger layer commands Specify total number of channels to scan 1 to 99999 Select control source IMMediate TIMer MANual Set timer interval 0 to 999999 999 seconds UNITs command summary UNI...

Page 38: ...nts could be used to close channel 3 HP BASIC OUTPUT 716 rout close 3 QuickBASIC 4 5 PRINT 1 output 16 rout close 3 3 6 2 Opening channels Front panel Use the front panel CHAN key to open any closed c...

Page 39: ...mple assume that you want to measure DC volts on channel 2 AC volts on channel 3 and 2 wire resistance on channel 6 The commands are as follows HP BASIC OUTPUT 716 rout scan int func 2 volt dc OUTPUT...

Page 40: ...lowing will be displayed TEMP SENSOR TYPE 4 WIRE RTD RTD THERMOCOUPLE 3 Select THERMOCOUPLE then press ENTER The Model 2001 will then display the thermocouple setup menu THERMOCOUPLE SETUP THERMOCOUPL...

Page 41: ...curacy will be reduced NOTE If you attempt to measure thermocouple temperature before acquiring the reference junction the front panel ERR annuncia tor will indicate that an error has occurred Step 1...

Page 42: ...eral refer to the Model 2001 2002 Opera tor s manual Step 1 Connect RTD probes Connect RTD probes to the scanner using the basic resistance connections outlined in Section 2 For 4 wire probes pair the...

Page 43: ...r the RTD probes Do not use channels 5 and 10 for 2 wire probes because of the higher path resistance of these two channels Step 2 Assign RTD sensor type to the ALT function 1 From normal display pres...

Page 44: ...unit will then prompt you for the reference offset REFJCN 1 54 63mV C 10 If necessary set the offset to 54 63mV 0 C then press ENTER 11 Press EXIT as necessary to return to the CONFIG TEM PERATURE me...

Page 45: ...RINT 1 output 16 rout scan func 7 1 rjun1 PRINT 1 output 16 rout scan func 8 2 6 temp PRINT 1 output 16 rout clos 1 9 PRINT 1 output 16 temp rjun1 acq 10 PRINT 1 output 16 rout open all 11 Comments 1...

Page 46: ...g the following programming statements to open and close channels The following statements assume that the previous scanning program has been run Remember that the timer was set to 0 5 seconds Therefo...

Page 47: ...and Lets you manually step through consec utive internal card channels OPEN and CLOSE Lets you selectively open and close internal card channels SHIFT CONFIG Use to configure stepping scanning STEP St...

Page 48: ...is 10 and the reading count is 15 After stepping through the 10 channels the stepping process wraps back to the first channel and continues until channel 5 is stepped The readings for the 15 stepped...

Page 49: ...essing OPEN will immediately open any closed scanner card channel or channel pair for a 4 wire function 3 9 3 Start stepping or scanning The STEP key is used to start the stepping process When STEPpin...

Page 50: ...sistance of these channels Step 2 Configure temperature measurements As previously explained see Temperature measurement configuration configure the Model 2000 2010 for temper ature measurements Step...

Page 51: ...r Select thermocouple type J K T also N for Model 2010 Configure reference junction Select reference type SIMulated or REAL Specify simulated temperature in C 0 to 50 Configure real reference junction...

Page 52: ...drivers and setting the terminator add the following program statements to configure the Model 2000 2010 to make Type K thermocouple temperature measure ments Comments PRINT 1 output 02 rst 1 PRINT 1...

Page 53: ...t scan lsel none 21 PRINT 1 output 02 rout open all 22 END Comments 6 Disables continuous intiation 7 Sets trigger count to 12 2 scans of 6 channels 8 and 9 Selects TIMER and sets it for 0 5 seconds T...

Page 54: ...r testing The Model 2001 TCSCAN can be used to test up to seven re sistors using 2 wire measurements or up to four resistors us ing 4 wire measurements Such tests use the Model 2001 2 and 4 resistance...

Page 55: ...effects of voltage drops across the test leads greatly reducing measurement errors with lower DUT resistances Note however that an extra two poles of switching are required for each resistor tested F...

Page 56: ...g Figure 3 5 shows a test configuration using mixed 2 pole and 4 pole switching Four pole switching is used only for the device connected to channels 2 and 7 Five more resistors are tested using 2 pol...

Page 57: ...om a ven dor will be tested to verify the specifications The tempera ture coefficient is usually checked at several temperature points to ensure its integrity over a range of temperatures Evaluation o...

Page 58: ...quivalent Circuit Thermocouple DMM 2001 TCSCAN DUT Model 2001 TCSCAN t 1 REF JCN TC 4 10 3 Short DUT Source HI Sense HI Source LO Sense LO DMM 2001 TCSCAN DUT R Input HI Input LO Sense HI Sense LO DMM...

Page 59: ...nnels 7 10 0 55 C When making relative temperature measurements and not absolute measurements it is advantageous to use adjacent channels Adjacent channels will have no more than the following gradien...

Page 60: ...and 10 is approximately 240 For this reason you should not use channels 5 and 10 for low to medium 2 wire resistance measurements 100k For example measuring a 1k resistor using channel 5 or channel 10...

Page 61: ...e EMI to acceptable levels In extreme cases a specially constructed screen room may be re quired to suf ciently attenuate troublesome signals Many instruments incorporate internal ltering that may hel...

Page 62: ...sistance Also contaminants present in the air can be depos ited on the insulator surface To avoid these problems never touch the connector insulating material In addition the scanner card should be us...

Page 63: ...Operation 3 34...

Page 64: ...tatic sensitive devices Re views precautions necessary when handling static sensitive devices 4 6 Principles of operation Briefly discusses circuit op eration 4 7 Troubleshooting Presents some trouble...

Page 65: ...an ambient temperature between 18 and 28 C and at a relative humid ity of less than 70 4 3 2 Recommended equipment Table 4 1 summarizes the equipment needed for performance verification and calibrati...

Page 66: ...ithley Model 237 ALG 2 Offset current Low thermal cable untermi nated Keithley Model 1484 Contact potential Thermistor probe Thermometrics Series CSP A207A 0 005 C accuracy Reference junction calibrat...

Page 67: ...T A LO Copper Wires Input LO Model 2001 2 Measure DCV NEXT DISPLAY PREV POWER DCV ACV DCI ACI 2 4 FREQ TEMP REL TRIG STORE RECALL INFO LOCAL CHAN SCAN CONFIG MENU EXIT ENTER RANGE AUTO FILTER MATH RAN...

Page 68: ...2 4 6 9 2 Channels 5 and 10 252 NOTE Change to the 2k resistance range when measuring channels 5 and 10 Always use the lowest possible range for best accuracy 12 After completing the tests turn off th...

Page 69: ...esistance checks Model 2001 Rear Panel HI LO Channel 2 HI LO Channel 3 4 Channel 5 HI LO Channel 6 HI LO Channel 7 9 Channel 10 HI LO OUT A OUT B HI LO 2 Pole 4 Pole Jumper HI and LO of All Nine Chann...

Page 70: ...annel 3 4 Channel 5 HI LO Channel 6 HI LO Channel 7 9 Channel 10 HI LO OUT A OUT B HI LO 2 Pole 4 Pole Connect bare copper jumpers between HI and LO Model 2001 TCSCAN Model 1484 Low Thermal Cable Unte...

Page 71: ...olation resistance between the HI and LO terminals of channel 2 10 Place the Model 6517 in standby and enable zero check 11 Repeat steps 7 through 10 for channels 3 through 10 Be sure that the channel...

Page 72: ...37 ALG Triax Cable Banana Cable one end unterminated Figure 4 4 Connections for same channel isolation tests HI LO Channel 2 HI LO Channel 3 4 Channel 5 HI LO Channel 6 HI LO Channel 7 9 Channel 10 HI...

Page 73: ...O Channel 6 HI LO Channel 7 9 Channel 10 HI LO OUT A OUT B HI LO 2 Pole 4 Pole Model 2001 TCSCAN Model 2001 Chassis Ground REF JCN Channel 1 HI Model 6517 Input Red Banana Cable Common V Source HI LO...

Page 74: ...nt absolute calibration accuracy can not be guaranteed Assuming the homogeneity of the thermocouple wire spool errors due to thermocouple offset voltages will be signifi cantly reduced for the entire...

Page 75: ...T ENTER RANGE AUTO FILTER MATH RANGE 2001 MULTIMETER SENSE 4 WIRE HI INPUT LO INPUTS CAL 500V PEAK F R FRONT REAR 2A 250V AMPS 350V PEAK 1100V PEAK Sense HI Input HI Input LO Model 2001 2 Measure DCV...

Page 76: ...while working with these devices Model 2001 Measure Temperature OUT A LO OUT A HI Input HI Input LO Model 2001 TCSCAN in Model 2001 Ice Bath Channel 2 HI Channel 2 LO Copper Wires R151 Cal Adjustment...

Page 77: ...s 4 6 5 Reference junction The reference junction for cold junction compensation is made up of U105 and associated components Calibration adjustment is provided by R151 4 7 Troubleshooting 4 7 1 Troub...

Page 78: ...r each mounting hole completely free of sol der Each relay pin must be free to move in its mounting hole before re moval Also make certain that no burrs are present on the ends of the relay pins 3 If...

Page 79: ...l data pulses 5 U101 pin 7 STROBE pulse End of relay update sequence 6 U101 U103 pins 10 18 Low when relay state is changed High when relay is not changing state Relay driver outputs 7 U105 pin 2 54 6...

Page 80: ...information Card model number 2001 TCSCAN Card serial number Part description Circuit description if applicable Keithley part number 5 4 Factory service If the card is to be returned to Keithley Inst...

Page 81: ...L2 5V RELAY ULTRA SMALL POLARIZED TF2E 5V RL 155 RL 149 P1034 CONN FEMALE DUAL 16 PIN CS 455 R134 R147 R148 R149 R150 R151 R152 155 RES 1K 5 1 4W COMPOSITION OR FILM RES 4 7K 5 1 4W COMPOSITION OR FIL...

Page 82: ...POLYURETHANE STRAIN RELIEF TOP SHIELD TOP STRAIN RELIEF BOTTOM BOTTOM SHIELD CARD EJECTOR PLASTIC SLEEVED BANANA PLUG TEST LEAD CHIPLOC BAG STATIC SHIELDING OVERLAY BOTTOM SHIELD THERMAL RTV 2001 351A...

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Page 85: ...an offset voltage in millivolts at 0 C A 2 Theory A thermocouple is a junction formed between two dissimilar metals If the temperature of the thermocouple junction con nected to the Model 2001 TCSCAN...

Page 86: ...e derived in step 2 to the ther mocouple voltage measured in step 3 E Er Et 5 Convert the voltage sum E from step 4 to a temperature T using either thermocouple lookup tables or the for mula T a0 a1E...

Page 87: ...nce for those who wish to use the Model 2001 TCSCAN to make thermocouple temperature measurements with other instruments Note that the Model 2001 Multime ter does not use these tables for temperature...

Page 88: ...tions to the data as a function of temperature C in selected temperature ranges The expansion is of the form E a0 a1T a2T2 a3T3 a4T4 where E is in microvolts and T is in degrees Celsius Type S Thermoc...

Page 89: ...f temperature C in selected temperature ranges The expansion is of the form E a0 a1T a2T2 a3T3 a4T4 where E is in microvolts and T is in degrees Celsius Type R Thermocouples4 Temperature Range C a0 a1...

Page 90: ...of temperature C in selected temperature ranges The expansion is of the form E a0 a1T a2T2 a3T3 a4T4 where E is in microvolts and T is in degrees Celsius Type B Thermocouples6 Temperature Range C a0...

Page 91: ...mperature C in selected temperature ranges The expansion is of the form E a0 a1T a2T2 a3T3 a4T4 where E is in microvolts and T is in degrees Celsius Type E Thermocouples8 Temperature Range C a0 a1 a2...

Page 92: ...ion of temperature C in selected temperature ranges The expansion is of the form E a0 a1T a2T2 a3T3 a4T4 where E is in microvolts and T is in degrees Celsius Type J Thermocouples10 Temperature Range C...

Page 93: ...f temperature C in selected temperature ranges The expansion is of the form E a0 a1T a2T2 a3T3 a4T4 where E is in microvolts and T is in degrees Celsius Type K Thermocouples12 Temperature Range C a0 a...

Page 94: ...n of temperature C in selected temperature ranges The expansion is of the form E a0 a1T a2T2 a3T3 a4T4 where E is in microvolts and T is in degrees Celsius Type T Thermocouples14 Temperature Range C a...

Page 95: ...3 2 Front panel scanning 3 9 G General information 1 1 Ground loops 3 32 H Handling and cleaning precautions 4 1 Handling precautions 1 2 2 1 4 1 I IEEE 488 bus scanner commands 3 6 IEEE 488 bus scann...

Page 96: ...ndling of static sensitive devices 4 13 Specifications 1 2 Start stepping or scanning 3 20 Switching circuits 4 14 T Temperature measurements 3 11 3 20 Temperature measurement configuration 3 21 Tempe...

Page 97: ...check one Drifts Unable to zero Unstable Will not read applied input Overload Calibration only Certi cate of calibration required Data required attach any additional sheets as necessary Show a block...

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