Burster RESISTOMAT 2302-V001 Manual Download Page 46 | Manualshive

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RESISTOMAT

®

Model 2302-V001

Page 46

Introduction &

applications

Description of functions

Brief guide

Operation

Calibration

Test and offset

instructions

RS232 data

output

Accessories and Circuit diagram

Voltage amplifier

Picture 7: Circuit diagram - Voltage amplifier

Accessories and Circuit diagram

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Summary of Contents for RESISTOMAT 2302-V001

Page 1: ...93 Gernsbach 76587 Gernsbach RESISTOMAT Model 2302 V001 Note The information contained in the following is subject to change without prior notice No part of this document must be reproduced or process...

Page 2: ...RESISTOMAT Model 2302 V001 Page 2 Introduction applications Description of functions Brief guide Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram...

Page 3: ...Model 2302 V001 RESISTOMAT Page 3 Brief guide Operation Calibration Test and offset instructions RS232 data output Introduction applications Description of functions Accessories and Circuit diagram...

Page 4: ...T Model 2302 V001 Page 4 Introduction applications Description of functions Brief guide Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram Overview of...

Page 5: ...ion accuracy 16 Measurement range selection 16 Connecting the test unit 17 Shielding 18 Signal lamp for line resistance RL 18 Range transgression 19 RS232 output 19 Special interferences in the case o...

Page 6: ...RESISTOMAT Model 2302 V001 Page 6 Introduction applications Description of functions Brief guide Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram...

Page 7: ...sipation means more precise measurement of temperature dependent material In this field of application the automatic temperature offset will save you a lot of time which was needed earlier for separat...

Page 8: ...by supply line resistances though popular opinion has it that the influence of these lines should be negligible Actually it is negligible only as long as the line resistances do not exceed a certain...

Page 9: ...onsiderably higher They are by nature influenced by variations in the grid voltage The indicator lamp below the measurement terminals provides a simple means of checking in a closed measurement circui...

Page 10: ...rgical investigations based on resistance measurement Statistical quality control with computerized evaluation only became efficient on introduction of the RESISTOMAT with an RS232 C output allowing f...

Page 11: ...also controlled Current source Anelectroniccontrolcircuitsuppliesthecurrentwhichwassetanddisplayedusingtherange selector as soon as the external current path is closed The currents are calibrated with...

Page 12: ...test unit which is fed into the device via the Cu terminals U U is raised to this level by a high precision pre amplifier The copper terminals prevent the low measurement voltage from being falsified...

Page 13: ...choice of two different measurement currents for most ranges Select the higher current whenever permissible Zero potentiometer for voltmeter section Voltmeter input potential leads from the test unit...

Page 14: ...RESISTOMAT Model 2302 V001 Page 14 Introduction applications Description of functions Brief guide Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram...

Page 15: ...nds following power on you can start performing measurements to an accuracy of 0 1 although between 10 and 15 minutes could pass before the final accuracy is attained If the lowest measurement range i...

Page 16: ...ts must not be exposed to temperature fluctuations if required sufficientlylongwaitingperiodsshouldbeobservedtoallowcompensation Particularlyheat from human bodies frequently distorts measurement resu...

Page 17: ...rement current up to the potential taps otherwise the resistance value determined is higher than the actual resistance of the path the current is concentrated over a smaller cross section For stranded...

Page 18: ...ions can be expected Pole reversal in the current or voltage leads results in displays prefixed with a negative sign although this is purely a cosmetic error Shielding Normally measuring leads in labo...

Page 19: ...ch are superimposed on the measurement signal thus leading to an unstable display Intefering voltages of the mains frequency also detected everywhere possible are not very critical as they are filtere...

Page 20: ...ss be caused by very high voltage peaks The Model 2371 protective switchover unit solves this problem On the contact switch setting both the current and potential lines are bridged thus short circuiti...

Page 21: ...ont panel allows general re calibrations of the device acting proportionallyonallmeasurementcurrents Adjustmentscanthusbemadehereifallranges provide uniformly inaccurate results or even if particularl...

Page 22: ...RESISTOMAT Model 2302 V001 Page 22 Introduction applications Description of functions Brief guide Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram...

Page 23: ...spectively to point 6 on the connector strip 1 2 Connect the 2 soldering eyes located at the front between the electrolytic capacitors 220 40 on the current generation board to points 5 6 7 on the con...

Page 24: ...ut of the voltmeter 10 If the voltage display is consistently wrong as in item 7 the sensitivity trimmer of the digital voltmeter can be readjusted 11 Roughly test the current steps with the ammeter c...

Page 25: ...te within 0 05 20 If 2 m 3 A exhibits deviations 0 05 R 27 can be corrected on the switch board 21 20 m 3 A must now also be accurate within 0 05 22 Testing the temperature compensation Select any ran...

Page 26: ...RESISTOMAT Model 2302 V001 Page 26 Introduction applications Description of functions Brief guide Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram...

Page 27: ...2 2302 V001 PC interface Pin 2 TxD 2 RxD Pin 3 RxD 3 TxD Pin 7 SGND 5 SGND 4 DTR 6 DSR 5 CTR RS232 data output Pin assignment and configuration Initialisation phase After power on the interface needs...

Page 28: ...rates in bold type The next higher communication level after definition of signal transmission is the communication protocol The protocol used for the interface is a subset of the procedure described...

Page 29: ...End character The ASCII character Enquiry ENQ Control E CE 0x05 is used as the end character An addressed device responds to a correctly received instruction sequence with an acknowledgement signal Q...

Page 30: ...acter allowing the device which receives it to check the integrity of the message It is formed through a bit by bit exclusive OR operation on the entire message including the end character Topreventth...

Page 31: ...nd of an information telegram ETX Control C CC 0x03 Block check character Normally the transmitting device also sends a block check character With its help the receiving device can check whether the m...

Page 32: ...ith EEPROM parameters Example Master transmits Slave at address 18 Set the character delay to 0 ms fastest transmission C D 18cdC B OC C B B Block check character EOT 18cd STX 0 ETX B Slave responds M...

Page 33: ...gram after the last control character Note Power on state block check on Example Master transmits Slave at address 00 Include a block check character in future transmissions C D 00ebC E EOT 00eb ENQ S...

Page 34: ...6h Not used 017h Wrong set hardware command code 018h Wrong set hardware parameter value 019h Wrong parameter number in set format 01ah EEPROM error fa stands for first address W3 instruction The devi...

Page 35: ...instruction This instruction allows the interface to be set to a new address The instruction is sent to the current address It is thus not suitable for specifying the address immediately after systems...

Page 36: ...mission of a new one This function is required for example to communicate with stored program controls SPC Example Master transmits Slave at address 00 Set your response delay to 50ms C D 00sdC B 50C...

Page 37: ...ve responds Message understood The measurement value is 1 237 Ohms and has not been read in previously C B 01 237 OHM 1C C B STX CR LF 01 237 OHM 1 ETX B C F ACK Leading zeros are not suppressed durin...

Page 38: ...stands for send measurement value R2 3 instruction The addressed device is to transmit the measurement value read in last to the controller This value is accompanied by a flag which indicates whether...

Page 39: ...ting 0 Parameter 3 Send delay in msec Default setting 0 Parameter 4 ASCII character for FF formfeed printer operation Default setting 12 Parameter 5 ASCII character for CR carriage return printer oper...

Page 40: ...Parameters 11 17 These parameters cannnot be accessed Parameter 18 Baud rate This parameter contains the software configured baud rate Value Meaning 1 1200 baud 2 2400 baud 3 4800 baud 4 9600 baud 5...

Page 41: ...rC B 33C C B B Block check character EOT 00pr STX 33 ETX B Slave responds Message understood The value of parameter 33 is 3 147 C B 33 3 147C C B B Block check character STX 33 3 147 ETX B Master resp...

Page 42: ...med parameters Example Master transmits Slave at address 00 Store the new parameters C D 00seC E EOT 00se ENQ Slave responds Messageunderstood Apointisoutputforeverystoredparameter C F ACK si stands f...

Page 43: ...r IBM PC Thefollowingprogramsareintendedasshortandeasyexamplestodemonstratecommunications between the interface and a PC and can be used for testing They are not meant to serve as a basis for designin...

Page 44: ...RESISTOMAT Model 2302 V001 Page 44 Introduction applications Description of functions Brief guide Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram...

Page 45: ...n Test and offset instructions RS232 data output Introduction applications Description of functions Accessories and Circuit diagram Circuit diagram and Accessories Circuit digram Picture 6 Circuit dia...

Page 46: ...n applications Description of functions Brief guide Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram Voltage amplifier Picture 7 Circuit diagram Vol...

Page 47: ...e Operation Calibration Test and offset instructions RS232 data output Introduction applications Description of functions Accessories and Circuit diagram Picture 9 Assembly of Mother board Assembly of...

Page 48: ...e Operation Calibration Test and offset instructions RS232 data output Accessories and Circuit diagram Picture 10 PCB of Voltage Amplifier Picture 11 PCB of Current source Messpunkte f r Nullstellung...

Page 49: ...DKD 1240 Manufacturer Calibration Certificate Please refer to DKD Calibration Certificate but with reduced accuracy The traceability of the used secondary voltage and resistance standards to the natio...

Page 50: ...1 5 m 60 A 30 mV 4 x 10 4 1240 0 001 1 m 0 05 3 m 30 A 30 mV 5 x 10 5 1240 0 002 2 m 0 05 3 m 30 A 60 mV 5 x 10 5 1240 0 005 5 m 0 05 4 m 20 A 100 mV 5 x 10 5 1240 0 01 10 m 0 03 3 m 14 A 140 mV 5 x...

Page 51: ...ectrical conductivity respectively the resistance must be checked for compliance with specified values InconjunctionwithadigitalohmmeteroftheRESISTOMAT series theclamping devices are used in the cable...

Page 52: ...l 2388 1 set interchangeable contacts for the potential tap model 2390 Connection cable for RESISTOMAT model 2304 05 model 2381 K003 2318 2319 2302 Connection cable for RESISTOMAT model 2329 model 238...

Page 53: ...ainless steel and handles The outer contacting and inner potential tap points are insulated against each other The inner potential tap points are spring mounted Applications Particular attention is to...

Page 54: ...o 1000 mm2 The opening angle of the tongs and the formofthecontactingprofilesalsopermitspecialapplications such as measurement on heavy duty transformers The fitted supply leads are 10 m long with ban...

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