Front Panel Operations 2

Setting Operating Conditions

Alarm Indications While Monitoring

If the channel being monitored is in an alarm condition, the alarm limit 1 and/or 2 annunciators will be turned on, and the ALARM annunciator blinks bright/dim. The alarm limit annunciator indicates which alarm has been exceeded. If the monitored channel is not in alarm, the ALARM annunciator will be off, unless scanning and some other channel is in alarm, then the ALARM indicator has a steady dim display. See Figure 2-17 for information about the Monitor Mode.

Alarm Indications While Reviewing

If the channel being reviewed had been in an alarm condition, the ALARM and alarm limit 1 and/or 2 annunciators will be turned on. The alarm limit annunciator indicates which alarm has been exceeded. See Figure 2-18 for information about the Review Mode.

Clearing Alarm Parameters from a Channel

To clear alarm parameters from a channel, the alarm can be programmed to OFF for both alarm 1 and alarm 2, or the channel function can be changed to any other selection, including OFF.

Alarm Outputs for Channel 0 to 3 Using the Alarm Outputs Connector

A dedicated transistor-transistor logic (TTL) voltage output is available for channel 0 to channel 3 alarms, via the rear panel ALARM OUTPUTS connector. (See Chapter 1 of this manual for connection information.)If a channel is not in alarm, the voltage output at a connector terminal is a logical high (nominal +5V dc); if a channel is in alarm, the output is a logical low (nominal +0.7V dc). Alarm outputs are set following each scan. As shown in Table 2-4, there are 16 different alarm combinations. The decimal equivalent of the binary half-byte formed by Channel 3 to Channel 0 has significance in autoprinting operations. (See the following discussion on autoprinting.)

Alarm Outputs for Channels 4 to 20 Using the Digital I/O Connector

A shared transistor-transistor logic (TTL) voltage output is available for channel 4 to channel 20 alarms via the rear panel DIGITAL I/O connector, using terminals I/O 7 to I/O 4. (See Chapter 1 of this manual for connection information.)If a channel is not in alarm, the voltage output at a connector terminal is a logical high (nominal +5V dc); if a channel is in alarm, the output is a logical low (nominal +0.7V dc). Alarm outputs are set following each scan. As shown in Table 2-5, the alarm outputs for channels 4 to 20 are ORed in groups. For example, a logical low at I/O 7 indicates that channel 7 or 11 or 15 or 19 is in an alarm condition. Dedicated alarm channels are available only for channels 0 to 3 (see the above). Assigning alarms to channels 4 to 20 does not disable the associated I/O output from use by commands from the computer interface. (See using the "Digital Input/Output Lines" under "Additional Features.") The decimal equivalent of the binary byte formed by I/O 7 to I/O 0 has significance in autoprinting operations (see the following discussion) and for certain commands in the instrument command set, e.g., LOG?.

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Fluke 2635A user manual Alarm Indications While Monitoring, Alarm Indications While Reviewing
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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.
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