Using the Computer Interface

4

Introduction

Introduction

The instrument can be operated from a host via commands sent through the rear panel computer interface. The host can be a terminal, controller, PC, or other computer.

This chapter describes how to set up and operate the instrument via the RS-232 interface (standard with Hydra Series II Data Acquisition Unit and Hydra Series II Data Logger) or the IEEE-488 computer interface (optional with Hydra Series II Data Acquisition Unit only.) The RS-232 interface can also be connected to a serial printer for direct output of data in printed format.

With the IEEE-488 computer interface installed in the Hydra Series II Data Acquisition Unit, the instrument is fully programmable for use on the IEEE Standard 488.1 interface bus (1987). The instrument is also designed in compliance with supplemental IEEE Std. 488.2-1987.

This chapter assumes you are familiar with the basics of data communication, the RS-

232interface, and/or the IEEE-488 bus. For an introduction to the IEEE-488 interface, request Fluke Application Bulletin AB-36, "IEEE Standard 488-1978 Digital Interface for Programmable Instrumentation."

An annotated sample program, illustrating the use of the RS-232 computer interface, is provided at the end of this chapter. Calibration procedures using the computer interface are provided in the Hydra Series II Service Manual (P/N 110731).

Front Panel and Computer Interface Operations

When the instrument is operated from the front panel, it is said to be under front panel control. When the instrument is operated from a host, it is said to be operating under computer interface control.

Most operations that can be performed from the front panel can also be performed over the computer interface. Some operations, like setting communications parameters for the RS-232 interface and selecting the instrument address for IEEE-488 operations, can only be performed from the front panel.

Types of Computer Interface

Only one interface can be selected or used at a time.

The optional IEEE-488 interface is contained on a single printed circuit assembly and can be selected if it is installed in the Hydra Series II Data Acquisition Unit. The IEEE- 488 interface cannot be used with the Hydra Series II Data Logger. Of course, the RS- 232 interface can be re-selected even if the IEEE-488 interface is installed.

If you are going to use the RS-232 interface, continue reading. If you are going to use the IEEE-488 interface, skip to "USING THE IEEE-488 INTERFACE" later in this chapter.

Note

To determine which computer interface is enabled, select COMM (K

L). If "IEEE" appears on the display, the IEEE-488 interface is enabled.

Otherwise, if a baud rate appears, the RS-232 interface is enabled.

Using the RS-232 Computer Interface

The RS-232 interface allows ASCII, asynchronous, serial communication between the instrument and a host, a serial printer, or a terminal.

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Fluke 2620A, 2625A user manual Using the RS-232 Computer Interface, Front Panel and Computer Interface Operations
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2625A, 2620A specifications

The Fluke 2625A is a sophisticated data logger designed for a wide range of industrial and laboratory applications. This versatile instrument excels in capturing and monitoring temperature and voltage measurements with precision and reliability. One of its standout features is its ability to record data from various sensors, making it ideal for environments where comprehensive data acquisition is critical.

Equipped with a large LCD display, the Fluke 2625A provides clear and user-friendly access to real-time measurement data. Its graphical interface allows users to visualize trends and monitor readings easily, which significantly enhances usability. The device supports a variety of input types and can connect to thermocouples, RTDs, and other sensors, offering great flexibility for various measurement tasks.

The Fluke 2625A employs advanced measurement technologies that ensure accuracy in data logging. With a high sampling rate, it captures fast-changing signals while maintaining data integrity. The device features a built-in memory that allows for extensive logging, accommodating long-term monitoring tasks without requiring constant oversight. Users can set it to log data at specified intervals, offering customizable solutions for different monitoring needs.

Another significant characteristic of the Fluke 2625A is its robust communication capabilities. The device supports USB and RS-232 interfaces for easy connectivity with computers and other devices, making data transfer and analysis seamless. This feature is especially beneficial for users who need to compile or analyze large sets of data quickly.

Furthermore, the Fluke 2625A is designed with durability in mind. Its rugged construction makes it suitable for challenging environments, including those with high levels of vibration, dust, or moisture. This reliability ensures that the device can withstand the rigors of fieldwork while still delivering accurate measurements.

In summary, the Fluke 2625A is a powerful data logger that combines versatility, accuracy, and reliability. Its user-friendly interface, advanced measurement technologies, and robust design make it an essential tool for professionals in various industries, from manufacturing and HVAC to research and development. Whether monitoring temperature changes in a laboratory or assessing voltage levels in an industrial setting, the Fluke 2625A stands out as a trusted solution for effective data logging and analysis.
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