Analysis of performance characteristics and characteristics of F2640A/08 data acquisition recorder

NetDAQ network data collector is a powerful combination of software and hardware, which is very suitable for medium and small process monitoring and testing systems. It meets the increasing demand for measurement, recording and analysis tools that allow users to improve quality, maximize process efficiency and meet the need for adjustments. Units of 20 channels can be combined to integrate into systems with up to 400 channels. Two models are available, with scanning speeds up to 1000 readings/second and accuracy up to 0.01%. All NetDAQ models feature Fluke's patented universal input module, which uses its 20 channels to accept any combination of analog input types without the need for external signal conditioning. Simply connect the Universal Input Module to directly measure temperature, DC voltage, AC voltage, resistance, 4-20 mA and frequency (see the Universal Input Modules section for more information) Distributed NetDAQ systems can be connected directly into your existing network and send data directly to your PC. This greatly saves the cost of setting up a network and allows multiple users to view data simultaneously in real time. A NetDAQ unit can be connected to a notebook computer as a portable dedicated system for maintenance, product qualification, research and troubleshooting application systems. 

488k Key Features: Data acquisition, up to 1,000 readings/second 20 analog input channels, expandable to 400 channels Optional graphing and trending options Wall, box and rack mountable Connect to Ethernet Replacement for chart recorder.

Product Features:

System Configuration:

It is possible to build a NetDAQ system exactly the way you want it, with several different configurations. Can be configured as a stand-alone system, using high-speed communications cables to daisy-chain up to 20 NetDAQ units to a PC. In this way, real-time data can be sent directly to the PC in a simple way.

Or, connect NetDAQ directly to the company's internal network. Save time and money by sharing already installed network cables and hardware. Any user on the Internet can access the collected data if they wish.

The third configuration method is to connect a stand-alone NetDAQ system to the organization's network. This method isolates the data collection system from the unit's network, but still has the advantage of multiple users viewing the data. Network operations do not affect data collection and critical applications are not affected by network failures.

With high-speed communication, test results can be obtained very conveniently. No matter how you configure your data collection system, high-speed network communications always bring you many benefits. Using a network, NetDAQ units can be used to implement distributed applications at multiple locations. In this application, multiple PC users can view data in real time. Supports reading rates up to 3,000 readings per second (rps), ensuring high throughput. Reliable results are ensured even over long distances.

NetDAQ supports common Ethernet cabling types—10Base2 (coaxial cable) and 10BaseT (twisted pair)—as well as all major network operating systems, including Microsoft, Novell, Banyan Vines, and others using the TCP/IP communications protocol network.

Choose the performance you need:

The NetDAQ system has a modular structure and can be expanded to 400 channels. Using 20-channel units as building blocks, you can purchase the modules in the quantities required for your application. You can add them later if needed.

Since each application is not exactly the same, we offer two accuracy and measurement rates for you to choose from. The 2640A provides 0.01% V dc - 0.3ºC TC accuracy and 18-bit resolution, and can scan 6-100 channels per second; the 2645A can scan 48-1000 channels per second, 16-bit resolution, 0.01% V dc - 0.6ºC TC accuracy.

All modules provide a summation input channel that can accumulate 4,294,967,295 "on/off" events. This channel is continuously sampled and recorded with each scan of the other input channels.

Each analog and compute channel has two user-definable alarm limits that can be individually set to high, low, or off, and then assigned to one of eight digital I/O lines that initiate actions based on alarm conditions. Other digital I/Os can be independently used as input contact closures, switches or TTL levels.

application:

Powerful application software makes it easier for users to make real-time decisions. Using NetDAQ Logger for Windows software, configuring and reconfiguring the system is also a snap. Software based on Microsoft® Windows can plot data graphically, so it is convenient for users to make judgments. With its advanced trend analysis capabilities, you can view data in real time in conjunction with historical data, compare multiple channels, or zoom in on specific time periods. You can also print graphs directly from NetDAQ Logger. For more in-depth analysis, the graph can be pasted into a word processing or spreadsheet program.

Configuring the system is very simple using universal input modules:

With NetDAQ's universal input modules, you can measure any electrical or physical parameter without changing hardware or adding external signal conditioning. Any combination of DC voltage, AC voltage, thermocouple, current, RTD, resistance (2-wire or 4-wire) or frequency measurements can be connected directly to the input module. Fluke's patented signal conditioning functionality is built directly into the NetDAQ unit, eliminating the need to purchase external signal conditioning modules.

The 2640A NetDAQ can measure voltages up to 300V at a reading rate of 100 rps; the 2645A is the first instrument of its kind to directly measure multiple inputs up to 50 V at a reading rate of 1000rps. Using the Mx+B formula, various signals (0-10V or 4-20 mA) can be converted to standard engineering units.

Utilizing Fluke's patented technology, compensation of the thermocouple reference junction can be automatically achieved through the thermostatic block of the sensing input module. Excellent thermostatic performance is achieved by a thick copper layer embedded beneath the connection points, and there is a housing to prevent the input from changing with the environment. Cable ties prevent sensor wires from being accidentally disconnected.

When it's time to calibrate or use the NetDAQ unit in another application, you can leave it connected and just pull the module out.

Precise time scale:

As data is acquired, NetDAQ's non-volatile on-board clock timestamps the data to ensure correct recording regardless of network congestion. When the network is congested, NetDAQ's on-board memory caches data to ensure correct transmission of data to the host computer.

Choose a software package that meets your application:

The 2640A and 2545A NetDAQ units are built to Fluke standards for indoor applications and feature rugged metal enclosures that protect against high levels of electromagnetic interference and radio frequency emissions. Both modules have only 8 buttons on the front panel for local monitoring of all input measurements, as well as checking and setting communication parameters.

If you need to install a NetDAQ unit nearby but don't want to be in the way, you can mount the unit on the wall, or use optional mounting accessories to mount it in a rack or cabinet. For hazardous surroundings, such as corrosive or toxic environments, high temperatures or humidity, option NEMA-4X provides long-term protection and is easy to use.

Calibration is simple:

NetDAQ units are very stable, but are also very convenient when you do need to calibrate them. The optional service manual provides users with simple, step-by-step calibration instructions. (NetDAQ provides an RS-232 interface for calibration.)