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-22
2645A 2-Wire Resistance Measurement Specifications A-25.
The 2645A specifications for the 2-wire resistance measurement function is based
on the 4-wire resistance measurement specification (above) except you add a 700
to 1000 Ohm positive offset. This value varies for each channel and temperature
gradient (nominal +1%/ºC).
2645A 4-Wire RTD per ITS-1990 Measurement Specifications A-26.
Tables A-33 and A-34 provide 2645A specifications for the 4-wire Resistance-
Temperature Detector (RTD) measurement function. The 4-wire measurements
use 2 input channels a decade apart, e.g., channels 4 and 14.
Table A-33. 2645A 4-Wire RTD Temperature Coefficient
Specification Characteristic
Temperature Coefficient To calculate RTD accuracy for temperatures
between 28ºC and 60ºC, or -10ºC and 18ºC,
use a linear interpolation between the two
application points. e.g., if the applicable spec at
28ºC is .2 and the spec at 60ºC is .75, then the
specification at 40ºC is (.75-.2)*(40-28)/(60-28)
+ .2 = .55*(12/32)+.2 = .406.
Accuracy at -20°C Multiply the -10°C to + 60°C accuracy
specification by 2. After 1 hour warm-up. For
accuracy between -10°C and -20°C, interpolate
linearly.
Table A-34. 2645A 4-Wire RTD Specifications
Accuracy, 3σ ± ºC
Temperature Resolution
90 Day, 18ºC to
28ºC
1 Year,
18ºC to
28ºC
1 Year, -10ºC to
60ºC
Slow Fast Slow Fast Slow Slow Fast
-200ºC* 0.03ºC0.06ºC0.16ºC0.25ºC0.25ºC0.62ºC1.10ºC
0ºC* 0.03ºC0.06ºC0.20ºC0.31ºC0.31ºC0.85ºC1.30ºC
100ºC0.03ºC0.06ºC0.23ºC0.34ºC0.34ºC0.95ºC1.40ºC
300ºC0.03ºC0.06ºC0.30ºC0.41ºC0.41ºC1.18ºC1.70ºC
600ºC0.03ºC0.06ºC0.53ºC0.63ºC0.63ºC1.62ºC2.12ºC
* The Custom-385 range is not recommended for use below -80ºC. See Appendix D.