NetDAQ Networked Data Acquisition Unit

System configuration

Set up your NetDAQ system the way you want it. You can set up your NetDAQ system in several different ways. Configure an isolated system, daisy-chaining as many as 20 NetDAQ units to your PC with a high-speed communication line. This is a quick, simple way to send real time data directly to a PC.

Or, add NetDAQ units directly to your company's network. Sharing the network cabling and hardware that's already installed saves you time and expense. And, if you wish, all the users on your network have an easy way to access the data you're collecting.

A third configuration option is to add an isolated NetDAQ system to your company's network. This method isolates your data acquisition application from your company's network while still providing the advantages of multi-user viewing. High-speed applications won't be slowed down by network operations, and critical applications are completely protected from network failure.

High-speed communication makes it easier to get results. No matter how you set up your data collection system, high-speed networked communication offers you a number of benefits. It gives you the ability to implement distributed applications with NetDAQ units in multiple locations. In these applications, multiple PC users can monitor data, in real time, as it is collected. Support for up to 3,000 readings per second (rps) from multiple instruments keeps throughput high. And you're ensured of highly reliable results, even over long distances.

Choose the level of performance you need

NetDAQ systems are modular and expandable up to 400 channels. With the 20-channel units as building blocks, you can buy the number of channels you need for your application. Later, add units if you need them.

Because every application is different, we offer a selection of accuracies and measurement rates to match your application needs. The 2640A offers 0.01% V dc - 0.3ºC TC accuracy and 18 bit resolution, scanning 6 - 100 channels per second. The 2645A can scan at 48 to 1000 channels per second with 16 bit resolution and 0.01% V dc - 0.6ºC TC accuracy.

All models offer a totalizer input channel which counts up to 4,294,967,295 "on/off" events. This channel is continuously sampled and is recorded with each scan of the other input channels.

Each analog and calculated channel has two user-defined alarm limits which can be independently configured as high, low, or off, and assigned to one of the eight digital I/O lines which can initiate action based on alarm conditions. Or these digital I/O lines can be used independently as inputs for contact closures, switches, or TTL levels.

Application Software

Powerful application software makes real time decisions easier. The NetDAQ Logger for Windows software makes configuring and reconfiguring your system a snap. This intuitive software plots your data graphically, so you can get right down to making decisions. With its advanced trending capabilities, you can look at real time data in context of historical data, compare multiple channels, or zoom in on a particular time span. You can also print plots directly from NetDAQ Logger. For further analysis or to generate reports, cut and paste either plots or data into word processor or spreadsheet programs. LabVIEW drivers for NetDAQ are also available from this site.

System Requirements:

• 486 (or better) PC
• Windows (32-bit)
• 4 MB RAM
• 5 MB Free disk space

The Universal Input Module makes configuration a snap

NetDAQ's Universal Input Module lets you easily measure just about any electrical or physical parameter without changing hardware or adding external signal conditioning. Any combination of dc voltage, ac voltage, thermocouples, current, RTD, resistance (2- or 4-wire), or frequency measurement can be connected directly to the input module. Fluke's proprietary signal conditioning capability is built directly into the NetDAQ unit, thus eliminating the need to purchase external conditioning modules.

The 2640A NetDAQ can measure up to 300V at up to 100 rps. The 2645A is the first instrument of its type capable of directly measuring multiple inputs of up to 50V at 1000 readings per second. With Mx+B scaling you can convert a wide range of signals (0-10V or 4-20 mA) into standard engineering units.

Using Fluke's patented technology, thermocouple reference junction compensation occurs automatically, by sensing the temperature of the input module's isothermal block. Excellent isothermal performance is achieved by thick copper layers embedded just beneath connection points, and an enclosure that protects inputs from changing environmental conditions. And strain relief protects sensor wires from accidental disconnection.

For calibration, or use in another application, you can leave your field connections set up at your site and merely plug and unplug the module when you want to move the NetDAQ unit.

Accurate time stamping

NetDAQ's non-volatile, on-board clock time stamps data as measurements are taken ensuring proper recording regardless of network traffic levels. NetDAQ's on-board memory buffers data in the event that network traffic prevents timely delivery of data to the host PC.

Choose the packaging that suits your application

 
The 2640A and 2545A NetDAQ units are housed in Fluke's standard, field-tough metal case designed to resist effects of high EMI and RFI environments. Both models have a simple front panel interface with just eight buttons for local monitoring of all input measurements, and checking and setting communication parameters.

If you need your NetDAQ close at hand but out of the way, either unit can be permanently mounted on a wall, or in a rack or cabinet with optional mounting accessories.

Easy calibration

NetDAQ units are extremely stable, but when you do need to calibrate one, we've made it very easy. The optional service manual gives you simple, step by step calibration instructions. (An RS-232 interface is provided on the NetDAQ units for calibration.)

Powerful application software makes real time decisions easier.

The NetDAQ Logger for Windows software makes configuring and reconfiguring your system a snap. This intuitive software plots your data graphically, so you can get right down to making decisions. With its advanced trending capabilities, you can look at real time data in context of historical data, compare multiple channels, or zoom in on a particular time span. You can also print plots directly from NetDAQ Logger.

For further analysis or to generate reports, cut and paste either plots or data into word processor or spreadsheet programs. LabVIEW drivers for NetDAQ are also available from this site. NetDAQ's Universal Input Module lets you easily measure just about any electrical or physical parameter without changing hardware or adding external signal conditioning.

Any combination of dc voltage, ac voltage, thermocouples, current, RTD, resistance (2- or 4-wire), or frequency measurement can be connected directly to the input module.
Fluke's proprietary signal conditioning capability is built directly into the NetDAQ unit, thus eliminating the need to purchase external conditioning modules. NetDAQ's non-volatile, on-board clock time stamps data as measurements are taken ensuring proper recording regardless of network traffic levels. NetDAQ's on-board memory buffers data in the event that network traffic prevents timely delivery of data to the host PC. The 2640A and 2545A NetDAQ units are housed in Fluke's standard, field-tough metal case designed to resist effects of high EMI and RFI environments.

Both models have a simple front panel interface with just eight buttons for local monitoring of all input measurements, and checking and setting communication parameters. NetDAQ units are extremely stable, but when you do need to calibrate one, we've made it very easy. The optional service manual gives you simple, step by step calibration instructions. (An RS-232 interface is provided on the NetDAQ units for calibration.)

*Total instrument accuracy for 90 days following calibration and ambient temperature range of 18 to 28 Degrees C. Includes A/D errors, linearization conformity, initial calibration error, isothermality errors, reference junction conformity and power line voltage effects within the range from 107V ac to 264V ac.
**Resolution is 0.02°C or 0.04°F over the useful range of base metal thermocouples (J, K, T, E, N) and 1°C or 2°F resolution for types R, S, B, and C with slow scan.

*Total instrument accuracy for 90 days following calibration and ambient temperature range of 18 to 28 Degrees C. Includes A/D errors, linearization conformity, initial calibration error, isothermality errors, reference junction conformity and power line voltage effects within the range from 107V ac to 264V ac.
**Resolution is 0.2°C or 0.4°F over the useful range of base metal thermocouples (J, K, T, E, N) and 1°C or 2°F resolution for types R, S, B, and C with slow scan.

      Product manuals

• 2640A 2645A NetDAQ Service Manual Supplement
• 2640A 2645A NetDAQ Users Manual Supplement
• 2640A NetDAQ Statement of Memory Volatility
• 2645A NetDAQ Statement of Memory Volatility

      Brochures

• Data Acquisition Family Brochure1 66 MB

      Application notes

• How to Configure a Fluke Data Acquisition System for Use with Transducer

      Specifications

• Data Acquisition Detailed Specifications