Fluke 2635A RS-232 Cabling

D-1

Appendix D

RS-232 Cabling

Introduction

This appendix details the RS-232 cabling between the instrument and a PC, instrument

controller (Fluke 17XXA series), printer, or modem. All connections can be made using

the Fluke RS-series of cables (see Options and Accessories in Chapter 1). RS-232 cables

should not exceed 50 feet (15 meters) although longer cables are permitted if the load

capacitance measured at a connection point (including signal terminator) does not

exceed 2500 picofarads. The Fluke RS cables are 6 feet (1.83 meters) in length.

Connections

Figure D-1 summarizes the cable requirements for all typical RS-232 connections;

Figure D-2 through E-6 summarize instrument cabling diagrams; Figure D-7 shows the

pin arrangement for DB-9 and DB-25 connectors. There are two wiring schemes

(modem and null-modem), two types of connectors (DB-9 and DB-25), two cable end

conditions (male and female), and two equipment configurations (Data Terminal

Equipment [DTE] and Data Communications Equipment [DCE]). Because of variations

in RS-232 connectors, it is not possible to identify all possible configurations. In this

application, “null-modem” refers to a reversing of the following lines; receive (RX) and

transmit (TX), data terminal ready (DTR) and data set ready (DSR), and request to send

(RTS) and clear to send (CTS). Not all interfaces use all lines. Check the documentation

for the equipment you are interfacing with the instrument.

Cables

The Fluke RS-series of RS-232 cables are in the following standard configurations:

• RS40 - Null modem with DB-9/female and DB-25/female connectors

• RS41 - Modem with DB-9/female and DB-25/male connectors

• RS42 - Null modem with DB-9/female and DB-25/male connectors

Cables from other sources may be used, or cables can be fabricated based on the figures

in this appendix. The RS40 and RS42 cables are identical, except for the DB-25

connectors (female and male, respectively). Some interfaces allow a selection of cables.

Contents

Main LIMITED WARRANTY & LIMITATION OF LIABILITY Table of Contents Page Page 2635A Page Page List of Tables Page List of Figures Page CAUTION Interference Information Fluke Corporation Declaration of the Manufacturer or Importer Bescheinigung des Herstellers/Importeurs Warning To avoid electric shock: Page Ten Minute Tour Introduction xv A Ten Minute Tour xvi B xvii C xviii D xix E xx F E xxi G F xxii H G xxiii H Page Chapter 1 Preparation for Use Page Page 1-4 FUNC ALRM Mx+B OP80F.EPS ENTER mA mVDCAC Operating Modes Page Preparation for Use Operating Modes CAUTION 1-7 Figure 1-1. Data Bucket Front and Rear Panels Front Panel Operation Memory Card Operation Computer Operation Printer Operation Modem Operation Measurement Capabilities Mx+B Scaling Alarms Totalizer Channel Alarm Outputs and Digital I/O Options and Accessories Memory Card Reader Connector Set, 2620A-100 Setting Up the Instrument Unpacking and Inspecting the Instrument Adjusting the Handle Connecting the Instrument to a Power Source AC Operation DC Operation Input Channels Measurement Connections W Warning Using Shielded Wiring Crosstalk Universal Input Module Connections Page 1-16 Figure 1-6. Two-Terminal and Four-Terminal Connections Alarm Outputs Connections + 0123TR DC Power Alarm Outputs External Trigger Input Digital I/O Totalizer Input Controls and Indicators Front Panel Controls Front Panel Indicators Page Page K N K O 1-22 Preparation for Use Controls and Indicators 1-23 Page Chapter 2 Front Panel Operations Page Page 2-4 HYDRA op92f.eps kHz ENTER Summary of Front Panel Operations Configuring the Instrument for Operation Turning the Power on Configuring the Instrument for Operation 2-7 Selecting a Channel Configuring a Measurement Channel Configuring a Channel to Measure DC Volts 2-10 Configuring a Channel to Measure AC Volts Figure 2-5. Configuring a Channel to Measure AC Volts Perform the procedure in Figure 2-5 to configure a channel for measuring ac volts. In Configuring a Measurement Channel 2-11 Configuring a Channel to Measure Resistance Figure 2-6. Configuring a Channel to Measure Resistance Perform the procedure in Figure 2-6 to configure a channel for measuring resistance. In 2-12 Configuring a Channel to Measure Frequency Figure 2-7. Configuring a Channel to Measure Frequency Perform the procedure in Figure 2-7 to configure a channel for measuring frequency. In Configuring a Channel to Measure Temperature Thermocouples Resistance-Temperature Detectors Thermocouple Restrictions: Resistance Temperature Detectors Restrictions: 2-14 Configuring a Measurement Channel Figure 2-9. Configuring a Channel to Measure Temperature (RTDs) 2-15 Configuring a Channel Off Setting Operating Conditions Setting the Scan Interval Setting the Measurement Rate Setting the Alarms Alarm Indications While Scanning Alarm Indications While Monitoring Alarm Indications While Reviewing Clearing Alarm Parameters from a Channel Alarm Outputs for Channel 0 to 3 Using the Alarm Outputs Connector Alarm Outputs for Channels 4 to 20 Using the Digital I/O Connector Alarms and Autoprinting Alarms and Monitor-Alarm Triggering Alarms and Mx+B Scaling Setting Operating Conditions 2-21 2-22 Figure 2-13. Setting the Alarms Setting the Mx+B Scaling Examples Clearing Mx+B Scaling from a Channel 2-24 A Figure 2-14. Setting the Mx+B Scaling Setting Operating Conditions A Figure 2-14. Setting the Mx+B Scaling (cont) 2-25 Operating Modes Using the Scan Mode Memory Card as a Data Destination Memory Card Formatting Memory Card Capacity Memory Card Data Extraction 2-28 Memory Card Error Messages Figure 2-16. Memory Card Error Messages Using the Monitor Mode Using the Review Mode Additional Features Scan Triggering Options External Trigger Monitor-Alarm Trigger Triggering Options and Memory Card Operation Totalizer Operation Digital Input/output Lines 2-34 Setting Date and Time Figure 2-21. Setting Date and Time Reading Instrument Software Versions 6.3 A 4.7 Returning to the Local Mode Front Panel Key Lockout Options Instrument Interfaces Memory Card Interface Page Page Chapter 3 Memory Card Operations 3-2 HYDRA op81f.eps KB FUNC ALRM Mx+B 256 KB SRAM Memory Card Files Setup Files Data Files Memory Card Capacity Memory Card Battery Inserting and Removing the Memory Card Inserting a Memory Card Removing a Memory Card Changing the Memory Card During Scanning Setting the Memory Card Write-protect Feature 3-6 Initializing a Memory Card 3-7 Initializing a Memory Card Figure 3-3. Initializing a Memory Card Recording Measurement Results During Scanning Setup File Procedures 3-9 Setup File Procedures Figure 3-5. Using SETUP STORE to Save Configuration Files Using Setup Store 3-10 Using Setup Load Figure 3-6. Using SETUP LOAD to Load Configuration Files Setup File Procedures 3-11 Using Setup Erase Figure 3-7. Using SETUP ERASE to Delete Configuration Files Data File Procedures Using Data Open Data File Procedures 3-13 Using Data Erase Figure 3-9. Using DATA ERASE to Delete a Measurement Data File 3-14 Setup and Data Files Directory Figure 3-10. Using DIRECTORY to Examine SETUP and DATA files Setup and Data File Current Status 3-15 Setup and Data File Current Status Figure 3-11. Using STATUS to Examine SETUP and DATA Files Page Chapter 4 Computer Operations 4-2 FUNC ALRM Mx+B op82f.eps ENTER mA mVDCAC kHz Summary of Computer Operations Connecting the Instrument to a PC 4-4 Figure 4-1. Connecting the Instrument to a PC Configuring the Instrument for Computer Operations 4-5 Configuring the Instrument for Computer Operations Figure 4-2. Configuring the Instrument for Computer Operations Configuring the PC for Computer Operations Testing the Instrument/PC RS-232 Interface Testing the RS-232 Interface Using Terminal Emulation (Windows) Testing the RS-232 Interface Using Terminal Emulation (Generic) Page Testing the RS-232 Interface Using Gwbasic Testing the RS-232 Interface Using Qbasic Page Computer Interface Commands and Operation How the Instrument Processes Input Input Terminators Input String Examples Sending Numeric Values to the Instrument How the Instrument Processes Output Status Registers Instrument Event Register (IER) Page Standard Event Status Register (ESR) Status Byte Register (STB) Computer Interface Command Set Xmodem File Transfers 4-19 4-20 4-21 4-22 4-23 4-24 4-25 4-26 4-27 4-28 4-29 4-30 4-31 4-32 4-33 4-34 4-35 4-36 4-37 4-38 4-39 4-40 F 4-41 4-42 4-43 4-44 4-45 4-46 4-47 4-48 4-49 4-50 4-51 4-52 4-53 4-54 4-55 4-56 4-57 Figure 4-4. Sample Program (GWBASIC) (1 of 2) 4-58 Figure 4-5. Sample Program (GWBASIC) (2 of 2) 4-59 Figure 4-5. Sample Program (QBASIC) (1 of 3) 4-60 Figure 4-6. Sample Program (QBASIC)(2 of 3) 4-61 Figure 4-6. Sample Program (QBASIC) (3 of 3) 4-62 Figure 4-6. Sample Program (QuickC) (1of 5) 4-63 Figure 4-7. Sample Program (QuickC) (2 of 5) 4-64 Figure 4-7. Sample Program (QuickC) (3 of 5) 4-65 Figure 4-7. Sample Program (QuickC)(4 of 5) 4-66 Figure 4-7. Sample Program (QuickC)(5 of 5) Chapter 5 Printer Operations 5-2 FUNC ALRM Mx+B op83f.eps ENTER mA mVDCAC kHz Summary of Printer Operations Connecting the Instrument to a Printer 5-4 SERIAL-INPUT PRINTER Figure 5-1. Connecting the Instrument to a Printer PARALLEL-INPUT PRINTER Configuring for Printer Operations Configuring for Printer Operations Figure 5-2. Configuring the RS-232 Ports for Print Operations Printing Measurement Data and Memory Card Directory Problems? Printing Measurement Results During Scanning Printing Measurement Data and Memory Card Directory 5-7 Figure 5-3. Printing Measurement Results During Scanning 5-8 Printing the Review Array Figure 5-4. Printing the Review Array Printing Measurement Data and Memory Card Directory Printing the Directory of the Memory Card Page Chapter 6 Modem Operations 6-2 FUNC ALRM Mx+B op84f.eps ENTER mA mVDCAC kHz Summary of Modem Operations Connecting the Modem to a PC for Modem Configuration Configuring the Instrument Modem for Modem Operations Modem Operations Configuring the Instrument Modem for Modem Operations Figure 6-2. Connecting the Modem to a PC 6-5 6-6 Connecting the Modem to an Instrument Figure 6-3. Connecting the Modem to an Instrument Modem Operations Configuring the Instrument for Modem Operations 6-7 Configuring the Instrument for Modem Operations Figure 6-4. Configuring the Instrument RS-232 Port for Modem Operations Testing the RS-232/Modem Interface Problems? Chapter 7 Maintenance 7-2 5790A op85f.eps FUNC ALRM Mx+B ENTER Cleaning WWarning Line Fuse Selftest Diagnostics and Error Codes Performance Tests W Warning 7-6 Maintenance Performance Tests 7-7 Accuracy Verification Test Voltages greater than 150V can only be applied to channels 0,1, and 11. Channel Integrity Test Thermocouple Measurement Range Accuracy Test Four-Terminal Resistance Test Thermocouple Temperature Accuracy Test Open Thermocouple Response Test 7-12 SENSE Figure 7-2. Four-Terminal Connections to 5700A SOURCE SOURCE RTD Temperature Accuracy Test RTD Temperature Accuracy Test (Using Decade Resistance Source) RTD Temperature Accuracy Test (Using DIN/IEC 751 RTD) Digital Input/Output Verification Tests Digital Output Test Digital Input Test Totalizer Test Totalizer Sensitivity Test Dedicated Alarm Output Test Page + 7-20 Figure 7-4. Dedicated Alarms Output Test External Trigger Input Test + Calibration Variations in the Display Service Page Page Appendix A Specifications Accuracies at Ambient Temperatures Other than Specified Response Times DC Voltage Measurements A-2 Input Impedance Normal Mode Rejection 53 dB minimum at 60 Hz 0.1%, slow rate 47 dB minimum at 50 Hz 0.1%, slow rate Common Mode Rejection Page A-4 AC Voltage Inputs (True rms AC Voltage, AC-Coupled Inputs) See Table A-3. See Table A-4. A-5 Temperature Measurements (Thermocouples) See Table A-5. A-6 A-7 Input Impedance 100 M minimum in parallel with 150 pF maximum Common Mode and Normal Mode Rejection Temperature Measurements (RTDs) See Table A-7, A-8 and A-9. AC Voltage Measurements A-9 See Table A-10. See Table A-11. Page A-11 Resistance Measurements See Table A-13. See Table A-14. 2-Wire Accuracy Cross-Talk Rejection Frequency Measurements Resolution and Accuracy Frequency Range Input Sensitivity Maximum AC Input Typical Scanning Rate Maximum Autoranging Time Totalizing Input Digital Inputs Trigger Inputs Digital and Alarm Outputs Real-Time Clock and Calendar Environmental Specifications General Page Appendix B Crosstalk Considerations AC Signal Cross Talk in a DC Voltage Channel AC Signal Cross Talk into an AC Voltage Channel VACrms crosstalk Frequency crosstalk VACrms crosstalk () () () B AC Signal Cross Talk into a Frequency Channel AC Signal Crosstalk into a Temperature Channel Cerror VACrms crosstalk Page Appendix C Binary Upload of Logged Data Decoding the ASCII String C-2 Page Floating Point Conversion Page C-6 Example C-8 Appendix D RS-232 Cabling Connections Cables D-2 Figure D-1. Summary of RS-232 Connections D-3 Figure D-2. Hydra Series II (DB-9) to PC (DB-9) RS-232 Connection (Generic) D-4 Figure D-3. Hydra (DB-9) to PC (DB-25) RS-232 Connection D-5 Figure D-4. Hydra Series II (DB-9 to Modem (DB-25) RS-232 Connection D-6 Figure D-5. Hydra Series II (DB-9) to Printer (DB-25) RS-232 Connection D-7 Figure D-6. RS-232 DB-9 and DB-25 Connectors Page Page E-2 Table E-1. 8-Bit Binary-Coded-Decimal Binary Binary Binary Binary Appendix F Memory Card File Formats Data File Format Setup File Format F-2 Example F-4 Memory Card File Formats F-5 F-6 Memory Card File Formats F-7 F-8 Appendix G True RMS Measurements Effect of Internal Noise in AC Measurements Waveform Comparison (True RMS VS Average Responding) * * Figure G-1. Comparison of Common Waveforms G-2 Hydra Configuration Record Page Index 2 A C D E F H I L T U V X