Fluke 45 Operating the Meter Using the Computer Interface, Local and Remote Operations, Chapter

Chapter 5

Operating the Meter Using the Computer Interface

Introduction

The meter can be operated from a host (e.g., a terminal, controller, PC, or computer) by sending commands to it through a computer interface on the rear panel.

Chapter 5 describes how to set up, configure, and operate the meter via the RS-232 or (optional) IEEE-488 computer interface. With the (optional) IEEE-488 computer interface installed, the meter is fully programmable for use on the IEEE Standard 488.1 interface bus (1987). The meter is also designed in compliance with supplemental standard IEEE-488.2 (1987).

This chapter assumes you are familiar with the basics of data communication, the RS-232 interface, and 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 Chapter 5. Refer to Chapter 3 for complete descriptions of all meter functions and features. Remote calibration procedures are provided in the Fluke 45 Dual Display Multimeter Service Manual (P/N 856042).

Local and Remote Operations

When the meter is operated from a host, it is said to be operated "remotely." When the meter is operated from its front panel, it is said to be operated "locally."

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

Computer Interfaces

The meter comes equipped with an RS-232 (serial) interface. The IEEE-488 interface is optional and is contained on a single printed circuit assembly (pca). Only one computer interface can be enabled at a time. Using either interface turns the meter into a fully pro- grammable instrument that can be integrated into an automated instrumentation system.

If you are using the RS-232 interface, continue reading. If you are using the IEEE-488 interface, skip to "Preparing Meter for Operations via IEEE-488 Interface" later in Chapter 5.

5-1