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Contains Operating and Servicing Information

Model 2001-TCSCAN

Scanner Card

Instruction Manual

Содержание 2001-TCSCAN

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 63: ...Operation 3 34...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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