2640A/2645A NetDAQ

Users Manual

2640A DC Voltage Measurement Specifications

A-13.

Tables A-9 to A-11 provide 2640A specifications for the dc voltage measurement function.

Table A-9. 2640A DC Voltage Measurement General Specifications

Specification

Input Impedance

Normal Mode Rejection

Common Mode Rejection

Channel-to-Channel Crosstalk

Temperature Coefficient

Accuracy at -20°C

Maximum Input Voltage

Characteristic

100 MΩ in parallel with 150 pF maximum for ranges 3V

10 MΩ in parallel with 100 pF maximum for ranges >3V

50dB minimum at 50 Hz/60 Hz ±0.1%, Slow Rate

120dB minimum at dc, 50 Hz/60 Hz ±0.1%, 1 kΩ imbalance, Slow Rate

80dB minimum at dc, 50 Hz/60 Hz ±0.1%, 1 kΩ imbalance, Medium and Fast Rates

120dB minimum Slow Rate (e.g., 30V dc on channel 1 may cause a 30µV error on channel 2)

100dB minimum Medium and Fast Rates (e.g., 1V dc on channel 1 may cause a 10 µV error on channel 2)

Add 1/10th the 90-day specification per °C above 28°C or below 18°C. (Generally, only the %input portion is affected.)

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.

150V (300V for channels 1 and 11) to any input terminal.

 

Table A-10. 2640A DC Voltage Range and Resolution Specifications

 

 

 

 

 

 

 

 

Resolution

Range

 

 

 

 

 

Slow

 

Fast

 

 

 

 

 

 

 

 

90 mV

.3 µV

300 mV

1 µV

3V

10 µV

30V

100 µV

150V/300V

1 mV

Note 300V range applies to channels 1 and 11 only.

1µV

3µV

30µV

300µV

3mV

A-8

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Fluke 2645A 2640A DC Voltage Measurement Specifications, Table A-9 a DC Voltage Measurement General Specifications

2645A, 2640A specifications

The Fluke 2640A and 2645A are advanced bench multimeters that represent a significant leap in measurement technology, designed primarily for electrical engineers and technicians who require precision and reliability in their readings. These multimeters are built to cater to complex applications in manufacturing, research, and development.

One of the standout features of the Fluke 2640A and 2645A is their high accuracy. With specifications that can reach up to 0.0035% DC Voltage accuracy, users can trust that their measurements will be consistent and precise. This is especially critical in fields like automated test equipment (ATE) where exact measurements can be crucial for product quality and safety.

Both models incorporate a large, easy-to-read display, making it convenient for users to view measurement results clearly from a distance. They also feature a wide measurement range, capable of handling a variety of tasks, from basic voltage and current measurements to more complex tasks such as resistance and temperature measurements with appropriate sensors.

The multimeters also stand out with their advanced data logging capabilities. The Fluke 2645A, for instance, can store up to 10,000 readings, allowing for extensive data collection and analysis without the need for constant monitoring. This is beneficial for long-term studies or processes that require continual oversight.

Connectivity is another key characteristic. Both the 2640A and 2645A support USB and RS-232 interfaces, which enable easy integration with computers and other devices for seamless data transfer. This feature is important for engineers who rely on software for data analysis and visualization.

Another notable technology included in these models is the Fluke Connect app compatibility, which allows users to remotely monitor measurements from their smartphones or tablets. This capability provides added flexibility, enabling technicians to work hands-free while still keeping an eye on process measurements.

Additionally, the Fluke 2645A comes with a graphical display option, allowing users to visualize measurement trends over time. This graphical representation can be invaluable for diagnosing issues or observing patterns in data.

In conclusion, the Fluke 2640A and 2645A multimeters offer exceptional performance with their high accuracy, extensive data logging, connectivity options, and advanced visualization capabilities. These features make them indispensable tools for professionals in a variety of fields, ensuring that they can achieve reliable results in their measurement endeavors.