Whether you have inherited an older unit, purchased a used model without documentation, or are simply trying to understand the full capabilities of this analog multimeter, this article serves as your definitive companion. We will dissect the contents of the original manual, explain the technical specifications, provide a step-by-step operating guide, and offer troubleshooting tips that go beyond the standard documentation.

Manufactured during the golden age of Taiwanese test equipment (circa late 1990s to early 2000s), the Protek B-801 was designed to compete with expensive Agilent/HP meters. It offered 0.1% basic accuracy and a wide frequency range (100 Hz, 120 Hz, 1 kHz, 10 kHz, and sometimes 100 kHz depending on the variant).

A Voltage Controlled Frequency (VCF) input allows for external control of the output frequency using an external DC voltage (

Essential for diagnosing power supply issues and signal processing.

Includes dedicated ports for milliamp (mA) and high-current (usually 10A or 20A) measurements. Resistance ( Ωcap omega

Allows for linear or logarithmic frequency sweeps, useful for testing the frequency response of circuits.

Insert the black lead into the COM port. Insert the red lead into the appropriate port (V/ Ωcap omega for voltage/resistance or mA/10A for current).

Use a damp cloth with mild detergent. Avoid harsh chemicals that can degrade the plastic casing or the display.

Manual Upd | Protek B-801

Whether you have inherited an older unit, purchased a used model without documentation, or are simply trying to understand the full capabilities of this analog multimeter, this article serves as your definitive companion. We will dissect the contents of the original manual, explain the technical specifications, provide a step-by-step operating guide, and offer troubleshooting tips that go beyond the standard documentation.

Manufactured during the golden age of Taiwanese test equipment (circa late 1990s to early 2000s), the Protek B-801 was designed to compete with expensive Agilent/HP meters. It offered 0.1% basic accuracy and a wide frequency range (100 Hz, 120 Hz, 1 kHz, 10 kHz, and sometimes 100 kHz depending on the variant).

A Voltage Controlled Frequency (VCF) input allows for external control of the output frequency using an external DC voltage ( Protek B-801 Manual

Essential for diagnosing power supply issues and signal processing.

Includes dedicated ports for milliamp (mA) and high-current (usually 10A or 20A) measurements. Resistance ( Ωcap omega Whether you have inherited an older unit, purchased

Allows for linear or logarithmic frequency sweeps, useful for testing the frequency response of circuits.

Insert the black lead into the COM port. Insert the red lead into the appropriate port (V/ Ωcap omega for voltage/resistance or mA/10A for current). It offered 0

Use a damp cloth with mild detergent. Avoid harsh chemicals that can degrade the plastic casing or the display.