NetDAQ Users Manual
Table Of Contents
- 2640A/2645A NetDAQ Users Manual
- 1. Overview
- 2. Preparing for Operation
- Introduction
- Instrument Preparation
- Unpacking and Inspecting the Instrument
- Positioning and Rack Mounting
- Connecting to a Power Source and Grounding
- Universal Input Module Connections
- Digital I/O Connections
- Alarm/Trigger I/O Connections
- External Trigger Wiring for a Group Instrument
- Controls and Indicators
- Front Panel Operating Procedures
- Power-On Options
- Displaying a Monitor Channel
- Displaying the Digital I/O Status
- Displaying the Totalizer Status
- Reviewing and Setting the Base Channel Number
- Reviewing and Setting the Line Frequency
- Reviewing and Setting the Network Type
- Reviewing and Setting the General Network Socket Port
- Reviewing and Setting the General Network IP Address
- Reviewing and Setting the Subnet Mask and Default Gateway
- Viewing the Instrument Ethernet Address
- Host Computer and Network Preparation
- Testing and Troubleshooting
- 3. Configuring NetDAQ Logger for Windows
- Introduction
- Configuring Network Communications
- Configuring the Current Setup
- Setup Files
- Configuring an Instrument
- Configuring Channels
- Configuring Mx+B Scaling From a File
- Entering an Instrument's Description
- Copying a Channels Configuration
- Default Configuration Settings
- Using Configuration Lockout
- Saving an Instrument's Configuration as a Text File
- Configuring the netdaq.ini File
- 4. Operating NetDAQ Logger for
- 5. Using Trend Link for Fluke
- Introduction
- Getting the Right Look for Your Trend Link Chart
- 6. Maintenance
- Introduction
- Self-Test Diagnostics and Error Codes
- Cleaning
- Fuse Replacement
- Performance Test
- Configuring the Performance Test Setup
- Initializing the Performance Test Setup
- Accuracy Performance Tests
- Volts DC Accuracy Test (2640A)
- Volts DC Accuracy Test (2645A)
- Volts AC Accuracy Test
- Frequency Accuracy Test
- Analog Channel Integrity Test
- Computed Channel Integrity Test
- Thermocouple Temperature Accuracy Test
- Open Thermocouple Response Test
- 2-Wire Resistance Accuracy Test (2640A)
- 2-Wire Resistance Accuracy Test (2645A)
- 4-Wire Resistance Accuracy Test (2640A)
- 4-Wire Resistance Accuracy Test (2645A)
- RTD Temperature Accuracy Test (Resistance) (2640A)
- RTD Temperature Accuracy Test (Resistance) (2645A)
- RTD Temperature Accuracy Test (DIN/IEC 751 RTD)
- Digital Input/Output Tests
- Totalizer Tests
- Master Alarm Output Test
- Trigger Input Test
- Trigger Output Test
- Calibration
- Variations in the Display
- Service
- Replacement Parts
- Appendices
- A. Specifications
- Introduction
- 2640A/2645A Combined Specifications
- 2640A Specifications
- 2640A DC Voltage Measurement Specifications
- 2640A AC Voltage Measurement Specifications
- 2640A 4-Wire Resistance Measurement Specifications
- 2640A 2-Wire Resistance Measurement Specifications
- 2640A RTD's 4-Wire, per ITS-1990 Measurement Specifications
- 2640A RTD's 2-Wire per ITS-1990 Measurement Specifications
- 2640A Thermocouple per ITS-1990 Measurement Specifications
- 2640A Frequency Measurement Specifications
- 2645A Specifications
- 2645A DC Voltage Measurement Specifications
- 2645A AC Voltage Measurement Specifications
- 2645A 4-Wire Resistance Measurement Specifications
- 2645A 2-Wire Resistance Measurement Specifications
- 2645A 4-Wire RTD per ITS-1990 Measurement Specifications
- 2645A Thermocouple per ITS-1990 Measurement Specifications
- 2645A Frequency Measurement Specifications
- B. Noise, Shielding, and Crosstalk Considerations
- C. True-RMS Measurements
- D. RTD Linearization
- E. Computed Channel Equations
- F. Data File Format
- G. Dynamic Data Exchange (DDE)
- H. Ethernet Cabling
- I. Network Considerations
- J. Error Messages & Exception Conditions
- K. Fluke Service Centers
- A. Specifications
- Index
- Instrument Parameter Record (Isolated Network)
- Instrument Parameter Record (General Network)
- General Network Parameter Record
- Host Computer General Network Parameter Record
2640A/2645A NetDAQ
Users Manual
A-12
2640A 4-Wire Resistance Measurement Specifications A-15.
Tables A-15 to A-17 provide 2640A specifications for the 4-wire resistance
measurement function. The 4-wire measurements use 2 input channels a decade
apart, e.g., channels 4 and 14.
Table A-15. 2640A 4-Wire Resistance Temperature Coefficient
Specification Characteristic
Temperature Coefficient Add 1/10th the 90 day specification per ºC
above 28ºC or below 18ºC.
Accuracy at -20°C Multiply the -10°C to + 60°C accuracy
specification by 2. After 1 hour warmup. For
accuracy between -10°C and -20°C, interpolate
linearly.
Table A-16. 2640A 4-Wire Resistance Range and Resolution Specifications
Resolution
Current Full Scale Maximum voltage
Range
Slow Fast
Applied Voltage applied by instrument
300Ω 1 mΩ 3 mΩ 1 mA 300 mV 3.5V
3 kΩ 10 mΩ 30 mΩ 100 µA 300 mV 3.5V
30 kΩ 100 mΩ 300 mΩ 10 µA 300 mV 3.5V
300 kΩ 1Ω 3Ω 10 µA 3.0V 3.5V
3 MΩ 10Ω 30Ω 1 µA 3.0V 3.5V
Table A-17. 2640A 4-Wire Resistance Accuracy Specifications
Accuracy, 3σ + (% input + V)
18ºC to 28ºC-10ºC to 60ºC
Range
90 Day 1 Year 1 Year
Slow Fast Slow Fast Slow Fast
300Ω .015%+20 mΩ .02%+80 mΩ .02%+50 mΩ .02%+120 mΩ .084%+126 mΩ .084%+336 mΩ
3kΩ .02%+.3Ω .02%+.8Ω .02%+.5Ω .02%+1.2Ω .084%+1.26Ω .084%+3.36Ω
30 kΩ .03%+3Ω .04%+10Ω .03%+5Ω .04%+15Ω .126%+12.6Ω .168%+42Ω
300 kΩ .1%+40Ω . 2%+100Ω .1%+60Ω .2%+150Ω .42%+168Ω .84%+420Ω
3 MΩ* .25%+800Ω* .5%+10kΩ* .25%+1 kΩ*.5%+1.5kΩ* 1.05%+3.36Ω 2.1%+4.2 kΩ*
* The 3 MΩ range is susceptible to the absorption of humidity under extreme conditions. If the instrument is
operated normally within its specified temperature-humidity range, the 3 MΩ range meets its accuracy
specifications. However, if the instrument is “soaked” at 50°C, 90% RH the 3MΩ range may require 1 hour
of “dry-out” time at 25°C, <40% RH for each hour of “soak” time in order to achieve its specified accuracy.