Introduction and Specifications
Introduction
1
1-3
1-1. Introduction
The Fluke 45 Dual Display Multimeter (also referred to as "the meter") is a 4-1/2-digit
(30,000-count) meter with a 5-digit (100,000-count) high resolution mode designed for
bench-top, field service, and system applications. The meter uses a dual vacuum-
fluorescent display, allowing for two types of readings from a single input. Primary and
secondary displays show the user-defined readings side by side. Even though the
readings are made sequentially, the displays show both readings at all times for ease of
comparison.
Some features provided by the meter are:
• Computer interface operation via the RS-232 interface (included) or the IEEE-488
interface (optional). The meter is fully programmable for use on the IEEE Standard
488.1 (1987). The meter is also designed in compliance with supplemental standard
IEEE-488.2 (1987).
• True rms ac
• (AC + DC) rms, calculated
• Frequency measurements to greater than 1 MHz.
• 1 µV sensitivity in volts dc
• Decibels with variable reference impedance and audio power measurement
capability.
• A compare mode to determine if a measurement is within, above, or below a
designated range.
• 100,000, 30,000, and 3,000 selectable count resolution, with reading speeds of 2.5, 5,
and 20 readings per second (rps), respectively.
• Built-in self-tests with closed-case calibration (no internal adjustments).
1-2. Operating Instructions
Full operating instructions are provided in the Fluke 45 Users Manual. Reference to
these instructions may be necessary during some of the maintenance and repair
procedures presented in this Service Manual. For quick references, an operating
instruction summary is presented on the inside of the front cover of the Service Manual.
For more detailed information, refer to the Users Manual.
1-3. Options and Accessories
Three options are available. These options can be installed either at the factory or in the
field. The following discussions pertain to the field-installable option kits:
• The Battery Kit (Option -01K) consists of a rechargeable, 8 V, lead-acid battery,
with battery bracket and charger assembly. The battery has a typical operating time
of eight hours and is fully operable at ambient temperatures between 0 and 50ºC.
• The IEEE-488 Interface Kit (Option -05K) consists of a printed circuit assembly,
connecting cables, and mounting hardware. This option provides full
programmability, external trigger input, and automated calibration. The IEEE-488
computer interface command set is identical to the RS-232 interface commands
wherever possible.
• Option -15K combines Options -01K and -05K as a single kit.
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