Fluke 45 user manual Replacing the 100 mA Input Fuse, Replacing the 10 a Input Fuse

Models: 45

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Maintenance 6

Current Input Fuses

If the fuse is good, the meter will read between .04 and 1.0 . If the fuse is blown, the meter will read >10 Mto OL.

Replacing the 100 mA Input Fuse

WWarning

For protection against fire or arc flash, replace a blown fuse only with one of identical rating.

The 100 mA input fuse is mounted in the front panel input jack (see Figure 6-2).

To replace this fuse, first unplug the line cord. Then press in on the input jack and turn it 90 degrees counter-clockwise as shown in Figure 6-2. Slide out the fuse holder and fuse.

Replace a blown fuse with one of identical rating (see Table 6-5) and reinsert the fuse and holder into the input terminal socket. Secure the fuse holder by pressing in and turning the holder 90 degrees clockwise.

F1 Fuse (500 mA, 250V, Fast Blow)

1500 A Minimum Breaking Capacity

 

Front Panel Input Terminal

V

 

 

 

 

 

 

600V

 

 

 

 

 

 

1000V CAT

 

 

 

10A

100 mA Input Socket

COM

CAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100

 

 

FUSE

mA

 

 

F1

 

 

 

500

 

 

 

FUSED

F

 

mA

 

 

 

250V

 

Fuse Holder

To remove, push in and turn counter clockwise.

To insert, reverse this procedure.

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Figure 6-2. Replacing the 100 mA Input Fuse

Replacing the 10 A Input Fuse

The 10 A input fuse is located inside the meter. To replace the fuse:

1.Remove the single Phillips-head screw on the bottom of the case and the Phillips - head screw on each side of the rear bezel.

WWarning

Opening the case may expose hazardous voltages. To avoid electric shock, always disconnect the power cord and measuring inputs before opening the case.

2.Remove the bezel and slip the case back from the front of the meter. The fuse and fuse clip are visible at the front of the main printed circuit assembly (pca) near the input terminals.

6-3

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Fluke 45 user manual Replacing the 100 mA Input Fuse, Replacing the 10 a Input Fuse, Front Panel Input Terminal

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.