Fluke 75, 21, 23, 77 instruction sheet Ml, K

Page 12

Overload protection for all functions and ranges: Rated voltage.

Function

L, mL, K

Input Impedance (Nominal)

>10 MΩ, <50 pF

L, mL

K

Common Mode

Rejection Ratio

(1 kΩ Unbalanced)

>120 dB at dc, 50 Hz, or 60 Hz

>60 dB dc to 60 Hz

Normal Mode Rejection

>60 dB at 50 Hz or 60 Hz

e

Open Circuit Test Voltage

<3.1 V dc

<2.8 V dc (typical)

Open Circuit Test Voltage

Full Scale Voltage

To 3.2 MΩ

32 MΩ

 

 

<440 mV dc

<1.4 V dc

<420 mV dc

<1.3 V dc

(typical)

(typical)

 

 

Full Scale Voltage

G R

e

GR G

<3.1 V dc

 

2.0 V dc

 

 

 

Short Circuit Current (typical)

 

 

 

 

21/75:

 

23/77:

400 μA

 

 

300 μA

500 μA

 

 

400 μA

 

 

 

 

 

VF

Current (typical)

 

21/75:

 

23/77:

0.0 V

0.5 mA

 

0.4 mA

0.6 V

0.4 mA

 

0.3 mA

1.2 V

0.3 mA

 

0.2 mA

2.0 V

0.1 mA

 

0.1 mA

Image 12
Contents 77/75/23/21 Input Jacks AutorangeManual Range Automatic Touch Hold Mode Bar GraphStandby AC and DC Voltage K L mLResistance e Diode Test G Continuity Test R Current ? aMaintenance Probe HolderFuse Replacement Specifications Service and PartsPage Function ML, K

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.