Continuity Test R, Current ? a | Fluke 23, 75, 21, 77 instruction

Continuity Test ( R )

RANGE

	CAT		CAT
	CAT		CAT
+	_	+	_
+		+

hc8f.eps

If continuity exists (resistance < 210 Ω for Models 21/75 and <270 Ω for Models 23/77), the beeper sounds continuously. The meter beeps twice if it is in Touch Hold® mode.

Current (? A)

WWarning

To avoid injury, do not attempt a current measurement if the open circuit voltage exceeds the rated voltage of the meter.

To avoid blowing an input fuse, use the 10 A jack until you are sure that the current is less than 300 mA.

Turn off power to the circuit. Break the circuit. (For circuits of more than 10 amps, use a current clamp.) Put the meter in series with the circuit as shown and turn power on.

RANGE

hc10f.eps

77, 23, 21, 75 specifications

The Fluke 75, 21, 23, and 77 are a series of digital multimeters (DMMs) known for their reliability, precision, and ease of use in various measuring applications. These models cater to a wide range of users, from professional electricians to DIY enthusiasts.

The Fluke 75 stands out for its advanced features, including a large, easy-to-read display that provides clear numerical and graphical readings. It supports a wide voltage range and can measure AC and DC currents. Additionally, the Fluke 75 is equipped with a built-in data logging function, enabling users to store measurements for future analysis. Its compact size and durable design make it suitable for both field and lab environments.

The Fluke 21 model focuses on simplicity and functionality. Designed primarily for basic electrical troubleshooting, it provides accurate measurements of voltage, current, and resistance. The user-friendly interface ensures that even those with minimal technical knowledge can operate the device effectively. The Fluke 21 is also known for its rugged construction, maintaining its performance even in harsh working conditions.

Fluke 23 takes it up a notch, offering a broader set of measurement capabilities, including capacitance and temperature measurement. This model features a unique dial that enhances user experience by allowing quick and easy access to various functionalities. Furthermore, the Fluke 23 has improved accuracy levels compared to its predecessor, making it an excellent choice for professionals who require high-precision measurements.

The Fluke 77 is another versatile option in this series, offering advanced measurement functions tailored for more demanding applications. It provides true RMS measurement, which allows for accurate readings of non-linear signals commonly found in modern electronics. The Fluke 77’s integrated safety features, including a CAT III safety rating, ensure that users can work with confidence in high-voltage environments.

Each of these multimeters incorporates Fluke's renowned build quality and robustness, ensuring longevity and resistance to environmental stressors. With features such as automatic ranging, backlighting for low-light conditions, and easy-to-navigate menus, these models exemplify the company's commitment to user-friendly design and effective measurement solutions. Overall, the Fluke 75, 21, 23, and 77 are exceptional tools that cater to a diverse array of electrical measurement needs, making them reliable choices for professionals and hobbyists alike.