Accuracy, Input Impedance, Normal Mode Rejection

2635A

Users Manual

Table A-1. DC Voltage Measurements - Resolution

Range

Resolution

Slow	Fast

	90 mV*	1 µV
	300 mV	10 µV

	3V	0.1 mV

	30V	1 mV

	300V	10 mV

	900 mV**	10 µV

*Not used in Autoranging

***Computer interface only (see FUNC command).

10µV

0.1mV

1mV

10mV

0.1V

0.1mV

Accuracy

See Table A-2.

Table A-2. DC Voltage Measurements - Accuracy

RANGE

		ACCURACY ±(%±V)

	18°C TO 28°C			0°C TO 60°C

90 DAYS	1 YEAR		1 YEAR	1 YEAR	1 YEAR
SLOW	SLOW		FAST	SLOW	FAST

90 mV*	.019%	+ 6 µV	.024% + 6 µV
300 mV		+ 20 µV		+ 20 µV
300 mV	.018%	+ 20 µV	.023%	+ 20 µV
3V		+ 0.2 mV		+ 0.2 mV
3V	.019%	+ 0.2 mV	.024%	+ 0.2 mV
30V		+ 2 mV		+ 2 mV
30V	.019%	+ 2 mV	.024%	+ 2 mV
150/300V	.019% + 20 mV			+ 20 mV
150/300V	.019% + 20 mV		.024%	+ 20 mV

900 mV* **	.016%	+ 20 µV	.021%	+ 20 µV

*Not used in Autoranging.

**Computer interface only (see FUNC command).

.044% + 20 µV

.040% + 0.2 mV

.041% + 2 mV

.041% + 20 mV

.041% + 0.2 V

.037% + 0.3 mV

.068% + 6 µV

.067% + 20 µV

.065% + 0.2 mV

.086% + 2 mV

.087% + 20 mV

.064% + 20 µV

.088% + 20 µV

.084% + 0.2 mV

.082% + 2 mV

.103% + 20 mV

.104% + 0.2 V

.096% + 0.3 mV

Input Impedance

100 Me minimum in parallel with 150 pF maximum for all ranges 3V and below 10 Me in parallel with 100 pF maximum for the 30V and 300V ranges

Normal Mode Rejection

53 dB minimum at 60 Hz ±0.1%, slow rate

47 dB minimum at 50 Hz ±0.1%, slow rate

Common Mode Rejection

120 dB minimum at dc, 1 ke imbalance, slow rate

120 dB minimum at 50 or 60 Hz ±0.1%, 1 ke imbalance, slow rate

A-2

2635A specifications

The Fluke 2635A is a highly advanced multichannel data acquisition system designed for engineers and technicians requiring precision and versatility in their measurement tasks. This instrument excels in monitoring and capturing data from various sources, making it a valuable tool in laboratories, production environments, and field applications.

One of the standout features of the Fluke 2635A is its ability to support up to 20 measurement channels. Users can simultaneously monitor multiple signals, which is crucial for complex testing scenarios where numerous variables need to be tracked. The device is equipped with a 6.5-digit precision measurement capability that ensures high accuracy and resolution in readings. This level of precision is particularly beneficial in applications such as environmental monitoring, research and development, and industrial process control.

The unit incorporates a variety of measurement modes, including voltage, current, temperature, and resistance, making it exceptionally versatile. The Fluke 2635A not only handles standard signals but also integrates with various transducers, providing extensive compatibility for users engaged in diverse testing applications.

To enhance data management, the Fluke 2635A offers advanced data logging capabilities. Data can be stored internally or transferred to external devices for further analysis. The internal memory can accommodate extensive datasets, which can be crucial in long-term monitoring tasks. Integration with external software enables users to analyze and visualize data effectively, allowing for informed decision-making based on comprehensive results.

The user interface is designed for ease of use, featuring a large, bright LCD display that clearly presents measurements and status information. The device is also equipped with a simple navigation system, allowing users to switch between channels and measurement types without hassle.

In terms of construction, the Fluke 2635A is built to withstand rigorous environments. It features a robust design that ensures reliability and durability, making it suitable for both laboratory settings and field operations. Furthermore, the device supports a wide temperature range, thus enabling usage in diverse conditions.

Overall, the Fluke 2635A is a powerful and flexible instrument that provides precise measurements across multiple channels, supporting a wide range of applications. Its advanced technology, combined with user-friendly features, makes it an essential tool for professionals in various fields. The combination of accuracy, flexibility, and durability solidifies its standing as a trusted choice for data acquisition and monitoring tasks.

Fluke 2635A user manual Accuracy, Input Impedance, Normal Mode Rejection, Common Mode Rejection

Models: 2635A