45

Users Manual

DC Voltage

Range

300 mV

3V

30V

300V

1000 V

100mV

1000 mV

10 V

100V

1000 V

Slow

1µ V

10µ V

100µ V

1mV

10mV

Resolution

Medium

10µ V

100µ V

1mV

10mV

100mV

Fast

100µ V

1mV

10mV

100mV

1V

Accuracy

(6 Months)

(1 Year)

 

 

002 % + 2

0.025 % + 2

0.02 % + 2

0.025 % + 2

0.02 % + 2

0.025 % + 2

0.02 % + 2

0.025 % + 2

0.02 % + 2

0.025 % + 2

 

 

0.02 % + 6

0.025 % + 6

0.02 % + 6

0.025 % + 6

0.02 % + 6

0.025 % + 6

0.02 % + 6

0.025 % + 6

0.02 % + 6

0.025 % + 6

 

 

Input Impedance

10 Me in parallel with <100 pF

Note

In the dual display mode, when the volts ac and volts dc functions are selected, the 10 Mdc input divider is in parallel with the 1 Mac divider.

Normal Mode Rejection Ratio

>80 dB at 50 Hz or 60 Hz, slow and medium rates

>54 dB for frequencies between 50-440 Hz, slow and medium rates

>60 dB at 50 Hz, fast rate (Note: Fast rate has no filtering)

Maximum Allowable AC Voltage While Measuring DC Voltage or (AC + DC) Voltages

Range

Max Allowable Peak AC

 

 

Voltage

 

 

 

Peak Normal Mode Signal

300 mV

100 mV

15 V

3 V

1000 mV

15 V

30 V

10 V

1000 V

300 V

100 V

1000 V

1000 V

1000 V

1000 V

 

 

 

* NMRR is the Normal Mode Rejection Ratio

† Normal Mode Rejection Ratio at 50 Hz or 60 Hz ± 0.1 %

NMRR* >80 dB†

15V

15V

50V

50V

200V

NMRR >60 dB†

15V

15V

300V

300V

1000 V

Common Mode Rejection Ratio

>90 dB at do, 50 or 60 Hz, (1 ke unbalanced, medium and slow rates)

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Fluke 45 user manual DC Voltage, Input Impedance, Normal Mode Rejection Ratio, Common Mode Rejection Ratio

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.