45

Users Manual

Display

The meter has a 5-digit, vacuum-fluorescent, dual display. This display shows measure- ment readings, annunciators, and messages. The annunciators indicate measurement units and the meters operating configuration.

The dual display allows you to see two properties (e.g., volts ac and frequency) of the input signal you are measuring. Readings are taken and displayed in an alternating fashion. That is, a reading is taken of one property of the input and sent to a display; then a reading of the other property is taken and sent to the other display. (For more detail, see "How the Meter makes Dual Display Measurements" in Chapter 4.)

The display flashes when a measurement exceeds 1000 V dc or 750 V ac, the maximum rated input level. If an input exceeds the full scale value of the selected range, the overload annunciator (OL) is displayed.

Primary Display

The primary display (shown in Figure 3-1) consists of the larger digits and annunciators (see Figure 3-2) and is located on the left side of the front panel. Readings using the rela- tive (REL), minimum maximum (MN MX), Touch Hold (HOLD), or decibels (dB) modifiers can be shown on the primary display only.

Secondary Display

The secondary display consists of a set of smaller digits on the right side of the dual dis- play (see Figure 3-3).

Press Sto turn the secondary display on and off. A series of five dashes is shown in the secondary display when the secondary display has been turned on but a function has not yet been selected.

45 DUAL DISPLAY MULTIMETER

REMOTE

SMF

MAX dB REL AUTO

EXT TRG

 

MIN HOLD

 

 

mA

 

 

 

 

 

 

 

 

 

 

 

 

 

mVDCAC

 

 

 

 

 

Mk Hz

 

 

 

 

 

 

aam09f.eps

Figure 3-1. Primary Display

3-2

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Fluke 45 user manual Primary Display, Secondary Display

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.