2635A

Users Manual

Testing the RS-232/Modem Interface

The PC end of the modem link involves a similar procedure of connecting the correct cable between the PC and modem, and configuring the modem to support the communications link. This is the responsibility of the user due to the variety of available modems and software. Be sure the PC COM port has the same parameters as those selected in Figure 6-4.

When all connections and configurations are complete, the PC should initiate communications with the modem supporting the instrument using the selected communications software. Typically, this means selecting a dial feature, or entering an AT command, e.g., ATDT 123-4567 from the terminal emulation screen. After the connection is made and the terminal emulation screen is present, enter a few <ENTER> characters to clear the instrument buffer, and note the instrument => prompts on the screen. Then enter the command *IDN? <ENTER> (since ECHO OFF was selected in Figure 6-4, the *IDN? characters will not appear on screen). The return should be FLUKE,2635A,0,Mn.n An.n Dn.n Ln.n where n.n is replaced with the versions of the displayed parameters. (See the *IDN? command in Chapter 4 for more information.)The RS-232/modem link is operating correctly and the PC may now operate using Starter or Logger applications software, or custom software.

Problems?

If the modem does not operate after making the RS-232 connection, telephone line connections, and setting the instrument and PC parameters, check the following:

1.No operation of any kind usually indicates a cabling problem, hardware incompatibility, a modem DIP switch problem, or incorrectly selecting ECHO ON in Figure 6-4 (ECHO OFF must be selected).

2.Incorrect operation usually indicates a configuration incompatibility, i.e., the instrument and PC baud rate and parity don’t match.

3.Verify the modem configuration data hasn’t been lost or corrupted. Some modems use an internal battery to retain configuration data when power is removed, and some modems lose configuration data if power is removed. If the configuration data is suspect, repeat the configuration procedures in this chapter.

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Fluke 2635A user manual Testing the RS-232/Modem Interface, Problems?
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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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