Fluke 268XA Ander
Fabrikant:
Model:
268XA
Datum:
2002
Categorie:
Groep:
Omschrijving:
Data Acquisition System/Data Logging System

Informatie

The 2686A comes with a removable PC Card (PCMCIA) for stand-alone storage operation. This socket accepts ATA memory cards up to 2 GB in size. Each 268XA device can hold from 1 to 6 analog modules. These modules are the Precision Analog module (PAI), Fast Analog module (FAI), and the Digital IO/Relay and Totalizer module (DIO). These modules are all isolated from one another. You can add the DIO module to the device in slot 6 only. The analog modules measure dc volts, ac volts, ohms, temperature, frequency, and dc current. Temperature measurements use thermocouples, thermistors or resistance temperature detectors (RTDs). The devices also have extensive computed math capability. Besides using data collected from the analog modules and digital totalizer, time can also be used in computed channel calculations. The system scans 20 to 120 analog channels and calculates the values for up to 60 computed channels. Interval timers, alarm conditions, and/or an external signal input can trigger scans. The Fluke DAQ Software configures and controls up to 99 268XA devices via an Ethernet connection. The Software provides the means to view scan data and log it into files. The analog modules that may be used with the 268XA are the FAI module and the PAI module. The PAI modules emphasize precision with 5 ½ digits of resolution, .02% accuracy, and can withstand up to 150 V common mode voltage (300 V on channels 1 and 11). The FAI modules emphasize increased measurement speed with 4 ½ digits of resolution, 0.04% accuracy, and can withstand up to 50 V common mode voltage. Device specifications are provided later in this chapter.

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Servicehandboek
Handleidingen type:
Servicehandboek
Pagina’s:
254
Grootte:
6.28 Mbytes (6585182 Bytes)
Taal:
english
Herziening:
Handleidingen-ID:
PN 1883791
Datum:
Kwaliteit:
Elektronisch document, geen scan, zeer goed leesbaar.
Upload datum:
2014 11 29
MD5:
74fef15ba400518f1b68f189f002e7bd
Downloads:
708

Informatie

1 Introduction and Specifications ... 1-1 Introduction ... 1-3 Block Diagrams ... 1-5 Specifications ... 1-7 2680A/2686A Combined Specifications ... 1-7 2680A/2686A General Specifications ... 1-8 Real-Time Clock and Calendar ... 1-9 Trigger In Specifications ... 1-9 Trigger Out Specifications ... 1-9 Master Alarm Output Specification ... 1-10 Communication I/O ... 1-10 2686A PC Card Storage ... 1-10 Precision Analog Input (PAI) A/D Specifications ... 1-11 Specifications PAI A/D DC Voltage Measurement ... 1-11 PAI A/D AC Voltage Measurement Specifications ... 1-13 PAI A/D 4-Wire Resistance Measurement Specifications ... 1-15 PAI A/D 2-Wire Resistance Measurement Specifications ... 1-16 PAI A/D 4-Wire RTD per ITS-1990 Measurement Specifications ... 1-16 PAI A/D 2-Wire RTD per ITS-1990 Measurement Specifications ... 1-16 PAI A/D Thermocouple per ITS-1990 Measurement Specifications ... 1-17 PAI A/D Frequency Measurement Specifications ... 1-20 Fast Analog Input (FAI) A/D Specifications ... 1-21 FAI A/D DC Voltage Measurement Specifications ... 1-21 FAI A/D AC Voltage Measurement Specifications ... 1-22 FAI A/D 4-Wire Resistance Measurement Specifications ... 1-24 FAI A/D 2-Wire Resistance Measurement Specifications ... 1-25 FAI A/D 4-Wire RTD per ITS-1990 Measurement Specifications ... 1-25 FAI A/D Thermocouple per ITS-1990 Measurement Specifications ... 1-26 FAI A/D Frequency Measurement Specifications ... 1-28 Digital Input/Output Module ... 1-29 Digital Input/Output Specifications ... 1-29 Totalizer Input Specifications ... 1-30 Digital Relay Specifications ... 1-30 Options and Accessories ... 1-31 2 Theory of Operation ... 2-1 Introduction ... 2-3 Main Power Supply ... 2-5 Secondary Supplies ... 2-5 Out-Guard Overview ... 2-5 Microprocessor ... 2-6 FPGA ... 2-7 Other Bus Devices ... 2-8 Serial Devices ... 2-9 Trigger In/Out, Master Alarm ... 2-9 PCMCIA Interface PCA (2686A-4041) ... 2-10 Backplane PCA (268XA-4001) ... 2-10 Display Interface ... 2-11 Module Interface ... 2-11 Module Power supply PCA (268XA-4031) ... 2-11 Digital Input/Output PCA ... 2-11 Microcontroller ... 2-12 Data Input Threshold ... 2-12 Digital Input Buffers ... 2-13 Digital Output Drivers ... 2-13 Relay Output Drivers ... 2-13 Totalizer Input ... 2-14 Totalizer Enable ... 2-14 A/D Theory of Operations ... 2-14 A/D Converter PCA Block Description ... 2-14 Analog Measurement Processor ... 2-15 Input Protection ... 2-15 Input Signal Conditioning ... 2-15 Analog-to-Digital (a/d) Converter ... 2-15 Inguard Microcontroller ... 2-15 Channel Selection ... 2-15 Open Thermocouple Check ... 2-16 Analog Input PCA Block Description ... 2-16 20-Channel Terminals ... 2-16 Reference Junction Temperature ... 2-16 A/D Converter PCA Circuit Description ... 2-16 Stallion Chip ... 2-18 Input Protection ... 2-18 Input Signal Conditioning ... 2-18 Function Relays ... 2-18 Channel Selection Circuitry ... 2-19 DC Volts and Thermocouples Measurement Circuitry ... 2-19 Ohms and RTD Measurement Circuitry ... 2-20 AC Volts Measurement Circuitry. ... 2-22 Frequency Measurements ... 2-23 Active Filter (ACV Filter) ... 2-24 Voltage Reference Circuit ... 2-24 Analog/Digital Converter Circuit ... 2-24 Autozero ... 2-24 Integrate ... 2-25 Deintegrate1 ... 2-25 Deintegrate2 ... 2-27 Overhead ... 2-27 Inguard Digital Kernel Circuitry ... 2-27 A4 Analog Input PCA Circuit Description ... 2-28 A31 A/D Power supply Circuit Description ... 2-29 Controller/System Power (Outguard) to A3 A/D Converter (Inguard) Communications ... 2-29 Special Codes ... 2-29 Resets ... 2-29 Commands ... 2-30 Perform Scan ... 2-30 Perform Self-Test ... 2-31 Return Firmware Version ... 2-31 Return Boot Firmware Version ... 2-31 Set Global Configuration ... 2-32 Set Channel Configuration ... 2-32 Do Housekeeping ... 2-32 Checksums ... 2-33 Errors ... 2-33 Power-Up Protocol ... 2-33 Inguard Unresponsive ... 2-33 Inguard Software Description ... 2-33 Hardware Elements ... 2-34 Channel MUX ... 2-34 Function Relays ... 2-35 Stallion Chip and Signal Conditioning ... 2-36 A/D ... 2-39 DISCHARGE Signal ... 2-42 Open-Thermocouple Detector ... 2-42 Channel Measurements ... 2-42 Reading Rates ... 2-42 Measurement Types ... 2-43 Autoranging ... 2-45 Overload ... 2-45 Housekeeping Readings ... 2-45 Reading Types ... 2-45 Housekeeping Schedule ... 2-46 Self-Tests ... 2-47 Power-Up Self-Tests ... 2-47 Self-Test Command ... 2-47 3 Maintenance ... 3-1 Introduction ... 3-3 Self-Test Diagnostics and Error Codes ... 3-3 Cleaning ... 3-6 AC Fuse Replacement ... 3-7 DC Fuse Replacement ... 3-8 4 Performance Verification ... 4-1 Introduction ... 4-3 Configuring the Performance Test Setup ... 4-3 Initializing the Performance Test Setup ... 4-5 Accuracy Performance Tests ... 4-6 Master Alarm Output Tests ... 4-7 RS-232 Master Alarm Output Test ... 4-7 Fluke DAQ Master Alarm Output Test ... 4-7 Trigger Input Tests ... 4-7 RS-232 Trigger Input Test ... 4-7 Fluke DAQ Trigger Input Test ... 4-8 Trigger Output Tests ... 4-8 RS-232 Trigger Output Test ... 4-8 Fluke DAQ Trigger Output Test ... 4-8 Volts DC Accuracy Test (PAI Module) ... 4-9 Volts DC Accuracy Test (FAI Module) ... 4-10 Volts AC Accuracy Test ... 4-11 Frequency Accuracy Test ... 4-11 Analog Channel Integrity Test ... 4-12 Open Thermocouple Response Test ... 4-12 2-Wire Resistance Accuracy Test (PAI) - Optional ... 4-13 2-Wire Resistance Accuracy Test (FAI Module) - Optional ... 4-14 4-Wire Resistance Accuracy Test (PAI Module) ... 4-16 4-Wire Resistance Accuracy Test (FAI Module) ... 4-19 Digital Input/Output Tests ... 4-20 RS-232 Digital Input/Output Test ... 4-20 Fluke DAQ Digital Input/Output Test ... 4-21 DIO Relay/Fuse Tests ... 4-21 RS-232 DIO Relay Fuse Test ... 4-21 Fluke DAQ DIO Relay Fuse Test ... 4-21 Totalizer Tests ... 4-22 RS-232 Totalizer Count Test ... 4-22 RS-232 Totalizer Count and Enable Test ... 4-22 RS-232 Totalizer Count and Direction Test ... 4-22 RS-232 Totalizer Count and Debounce Test ... 4-23 Fluke DAQ Totalizer Count Test ... 4-23 Fluke DAQ Totalizer Count and Enable Test ... 4-23 Fluke DAQ Totalizer Count and Direction Test ... 4-24 Fluke DAQ Totalizer Count and Debounce Test ... 4-24 5 Calibration ... 5-1 Introduction ... 5-3 Calibration ... 5-3 Methods of Calibration ... 5-3 Preparing for Calibration ... 5-3 Ending Calibration ... 5-6 RS-232 Device Configuration Parameters ... 5-6 Manual Calibration Procedure ... 5-7 Manual Calibration Commands ... 5-9 V DC Calibration Procedure ... 5-10 V AC Calibration Procedure ... 5-12 Resistance Calibration Procedure ... 5-13 Frequency Calibration Procedure ... 5-15 6 Diagnostic Testing and Troubleshooting ... 6-1 Introduction ... 6-3 Servicing Surface-Mount Assemblies ... 6-3 Error Detection ... 6-4 FLASH ROM Parameter Defaults ... 6-7 Background Testing ... 6-7 Retrieving Error Codes using RS-232 ... 6-8 Selecting the Diagnostic Tools ... 6-8 Diagnostic Tool dio ... 6-8 Diagnostic Tool rELAy ... 6-9 Diagnostic Tool idS ... 6-9 Diagnostic Tool conF ... 6-10 Diagnostic Display Test ... 6-11 COMM Parameter Reset ... 6-11 Using the RS-232 Interface ... 6-11 Command Processing ... 6-11 Device Configuration ... 6-12 Command Set ... 6-13 Troubleshooting the Device ... 6-25 General Troubleshooting ... 6-25 Sys/Ctrl PCA Troubleshooting ... 6-36 Troubleshooting the Sys/Ctrl PCA Digital Kernel ... 6-36 Troubleshooting the RS-232 Interface ... 6-36 Troubleshooting the Ethernet Interface ... 6-37 Troubleshooting the Keypad, Master Alarm Output, Trigger Input, and Trigger Out Lines ... 6-37 Troubleshooting the Power Supply ... 6-37 A2 Display PCA Troubleshooting ... 6-37 Variations in the Display ... 6-39 PCMCIA PCA Troubleshooting ... 6-40 A/D Power supply PCA Troubleshooting ... 6-40 DIO Module Troubleshooting ... 6-40 Digital Input Buffers ... 6-41 Digital Output Drivers ... 6-41 Relay Output Drivers ... 6-41 Totalizer Input ... 6-42 Totalizer Enable ... 6-42 Digital Output PCA Troubleshooting ... 6-42 A3 A/D Converter Module Troubleshooting ... 6-42 A3 Kernel ... 6-42 Break/Reset Circuit ... 6-43 Out of Tolerance Readings ... 6-43 Troubleshooting Relay Problems ... 6-44 A4 Analog Input PCA Troubleshooting ... 6-44 Troubleshooting Calibration Failures ... 6-44 Retrieving Calibration Constants ... 6-45 FlukeDAQ Software ... 6-47 7 Replaceable Parts ... 7-1 Introduction ... 7-3 How to Obtain Parts ... 7-3 Service Centers ... 7-3 Parts Lists ... 7-4 8 Schematics ... 8-1 Introduction ... 8-3

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