Getting Started 2

Selecting a Measurement Range

EXAMPLE: Press Zto select volts ac for the primary display, then press Ito select the decibels modifier.

•Press multiple buttons simultaneously.

EXAMPLE: Press Zand Ysimultaneously to select true rms volts ac + volts dc (calculated) in the primary display.

For more details on the uses of each button, refer to Chapter 3, "OPERATING THE METER FROM THE FRONT PANEL."

Selecting a Measurement Range

Measurement ranges can be selected automatically by the meter in "autorange" or manually by the user. In the autorange mode, the meter selects the appropriate range for the measurement reading.

To manually select a range, press Eto toggle in (and out) of the manual ranging mode, or press Uor T. In the manual range mode, press Uor Tto up range or down range to the desired range. For more details on ranging, refer to "Ranging’’ in Chapter 3.

Automatic Input Terminal Selection

If current (ac or dc) is being measured in the autorange mode and there is no input on the 100 mA terminal, the meter switches automatically between the 100 mA and 10 A input terminals looking for a signal. A front panel annunciator indicates that the meter is in the mA range while the meter attempts to select the correct input terminal.

When a signal is detected at either input terminal, the display updates with the measurement results. If an input signal is not found on either input terminal, a measurement is taken on the mA terminal.

Automatic input terminal selection is disabled when the meter is in the manual ranging mode. Use the Uand Tbuttons to select the appropriate current input terminal and range.

Taking Some Basic Measurements

WWarning

Read “Multimeter Safety” before operating this meter.

The following procedures describe the basics of taking common measurements from the front panel. These procedures are provided for the user who needs to get started quickly, but does not want to read the rest of the manual at this time. However, in order to take full advantage of your meter, you should read the remainder of this manual carefully and completely.

WWarning

To avoid electrical shock or damage to the meter, do not apply more than the rated voltage between any terminal and earth ground. The meter is protected against overloads up to the limits shown in Table 3-1. Exceeding these limits poses a hazard to the meter and operator.

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Fluke 45 user manual Selecting a Measurement Range, Automatic Input Terminal Selection, Taking Some Basic Measurements
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45 specifications

The Fluke 45 is a versatile and high-precision Digital Multimeter that is designed for a wide range of applications in electrical testing, troubleshooting, and maintenance. Known for its reliability and advanced features, the Fluke 45 is an essential tool for engineers, technicians, and professionals who require accurate measurement capabilities.

One of the standout features of the Fluke 45 is its ability to measure both AC and DC voltage and current. With a maximum input voltage of 1000 volts and current ranges up to 10 amps, users can conduct a variety of electrical tests with confidence. The device is equipped with an intuitive dual display, allowing for simultaneous viewing of multiple measurements. This feature enhances usability during complex diagnostics.

The Fluke 45 also boasts an impressive resolution of 0.1 mV and a basic accuracy of 0.25%, which translates to highly reliable readings. The auto-ranging capability simplifies the measurement process, automatically selecting the appropriate range based on the input signal, thus saving time and reducing user error.

In addition to voltage and current measurements, the Fluke 45 features resistance measurement capabilities, with a range of up to 40 MΩ. This makes it an effective tool for testing circuits, identifying faults, and ensuring the integrity of electrical systems. The continuity test function, complete with a built-in beeper, assists in quickly diagnosing wiring issues.

Another remarkable characteristic of the Fluke 45 is its frequency measurement capabilities, which can measure frequencies up to 1 MHz. This is particularly useful in applications involving signal analysis and troubleshooting oscillators.

Moreover, the Fluke 45 is designed with user convenience in mind. It is lightweight and portable, making it easy to carry around, whether on a job site or in a workshop. The rugged construction, reinforced with high-quality materials, ensures it can withstand harsh conditions often encountered in the field.

To enhance functionality, the Fluke 45 features a data hold function that freezes the displayed measurement for easier reporting. Additionally, it can store data for later retrieval, making it convenient for users who need to compile test results over time.

In summary, the Fluke 45 Digital Multimeter is an advanced instrument that combines precision, versatility, and user-friendly design. Its wide measurement capabilities, high accuracy, and durable build make it an invaluable tool for professionals in diverse electrical and electronic applications. Whether for routine maintenance or complex troubleshooting, the Fluke 45 stands out as a reliable partner in achieving accurate and efficient results.
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