NETDAQ-2640A
Fluke NetDAQ 2640A Networked Data Acquisition Unit, 20 channels, Ethernet (discontinued)
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About the NETDAQ-2640A
The Fluke 2640A NetDAQ is a 20-channel networked data acquisition unit. Together with Fluke's NetDAQ Logger software on a Windows PC it forms a data logging system that scans the analog channels in sequence and calculates up to ten additional computed channels from the readings.
It measures DC and AC volts, resistance, frequency, DC current (with a shunt) and temperature with thermocouples (types B, C, E, J, K, N, R, S, T) or RTDs. The 2640A is the precision model of the pair: 5 1/2 digits, around 0.02% DC accuracy and 150 V common-mode voltage (300 V on channels 1 and 11), with up to 143 readings per second; the otherwise identical 2645A trades accuracy for up to 1,000 readings per second.
Wiring goes to a removable Universal Input Module (2620A-100 connector set), and the rear panel carries digital I/O, totalizer, alarm/trigger I/O, RS-232 and Ethernet. Scans can be triggered by interval, alarm or an external signal; one PC can control up to 20 instruments. It runs on AC mains or 9 to 16 V DC and can be rack-mounted.
Fluke lists the 2640A and 2645A NetDAQ as discontinued and its page names no direct successor.
Frequently asked questions
What is the difference between the 2640A and 2645A?
They are identical in operation; the 2640A emphasises precision (5 1/2 digits, about 0.02% accuracy, up to 143 readings/s), the 2645A speed (4 1/2 digits, about 0.04%, up to 1,000 readings/s).
Which software runs it?
NetDAQ Logger for Windows (2640A-911) or NetDAQ Logger with Trending (2640A-912); Fluke DAQ 6.0.4 also supports the 2640A, but Fluke lists that software as discontinued too.
How does it connect to the PC?
Over Ethernet: 10BaseT twisted-pair or 10Base2 coax; Fluke's 2005 supplement notes that later units ship without the 10Base2 port.
Is it still made?
No. Fluke lists the 2640A and 2645A NetDAQ as discontinued.
Documents
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2640A/2645A NetDAQ users manual (Fluke)
Manual · English · media.fluke.com
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2640A/2645A NetDAQ service manual (Fluke)
Manual · English · assets.fluke.com
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2640A/2645A NetDAQ users manual supplement (Fluke)
Other · English · media.fluke.com
Specifications
| Power | 107 to 264 V ac 50/60 Hz, or 9 to 16 V dc |
| Network | Ethernet 10BaseT and 10Base2 (later units: 10BaseT only) |
| Resolution | 5 1/2 digits |
| Scan speed | Up to 143 readings/s (fast, 20 channels); 6/s slow |
| Serial port | RS-232C, 9-pin |
| Analog channels | 20 |
| Size and weight | 9.3 x 21.6 x 36.2 cm (H x W x D), 4 kg |
| Basic DC accuracy | About 0.02% (90 mV to 3 V ranges, 0.01% of input + offset, 90 days, slow rate) |
| Computed channels | 10 |
| Thermocouple types | B, C, E, J, K, N, R, S, T |
| Common mode voltage | 150 V (300 V on channels 1 and 11) |
| Measurement functions | DC volts, AC volts, ohms, frequency, DC current (with shunt), thermocouple and RTD temperature |
| Operating temperature | -20 to 60 °C |
| Digital I/O and alarm lines | 12 I/O lines total, plus totalizer and master alarm output |
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