Digital Multimeter True Rms YT-73089 YATO

The YATO model YT-73089 digital multimeter features a TRUE RMS function and automatic range selection, allowing users to perform both basic and advanced electrical measurements. Its compact design and large backlit display offer high mobility and ease of use. Engineered with a modern control board and high-quality measuring probes, this multimeter ensures speed, accuracy, and repeatability in readings, making it suitable for hobbyists and professional technicians alike. Additionally, the built-in rectangular waveform generator aids in diagnosing headphones or speakers, while a special microampere setting is perfect for testing various sensor types, such as flame sensors in HVAC systems. The measurement probes are encased in silicone insulation, providing flexibility and resistance to high temperatures.

Basic Measurements:

• AC Voltage Measurement: A.C. 0-750 V, TRUE RMS
• DC Voltage Measurement: D.C. 0-999.9 V
• AC Current Measurement: A.C. 0-9.999 A, TRUE RMS
• DC Current Measurement: D.C. 0-9.999 A
• Resistance Measurement: 0-9.999 MΩ
• Diode Test: IF 5 mA, UR 3 V
• Circuit Continuity Test: 0-50 Ω

Additional Measurements:

• Capacitance Measurement: 0-9.999 mF
• Frequency Measurement: 0-9.999 MHz
• Duty Cycle Measurement: 1-99%
• Rectangular Waveform Generator: 15 settings from 50 to 5000 Hz

Measurement Accuracy:

For the AC voltage measurement example with a result of 235 V, the accuracy of the YT-73089 multimeter for this range is: ±(1.0% + 3), resolution 0.1 V.

• Measurement error calculation formula: (measurement result x 1.0%) + 3 x resolution
• Calculation: (235 x 1.0%) + 3 x 0.1 = 2.35 + 0.3 = 2.65 V

The actual result including measurement error for a reading of 235 V is: 235 ± 2.65 V.

• Result including measurement error for DC voltage measurement indication: 12 V = 12 ± 0.09 V
• Result including measurement error for AC current measurement indication: 8 A = 8 ± 0.15 A

A resolution and accuracy table can be found in the user manual.

Built-in Functions:

• TRUE RMS: This function displays the true RMS value of AC voltage/current. Unlike averaging meters, TRUE RMS devices show accurate values for both sine and distorted waveforms, making it essential for contexts with pulse power supplies, motor drives, HVAC systems, and more.
• Waveform Generator: Setting the knob to generate a signal produces a rectangular wave of frequency from 50 to 5000 Hz, useful for diagnosing speakers or checking the low-frequency tracks in radios.
• AUTO: Automatic range adjustment ensures optimal measurement without risk of device damage. The meter begins in AUTO mode by default.
• RANGE: Allows manual range adjustment, which is helpful when measuring multiple components of the same known value, such as a series of resistors.
• SEL: Changes the measurement mode, such as from AC to DC voltage.
• DATA HOLD: Freezes the currently measured value on the display.

Additional Information:

• LCD display with a maximum result display of 9999.
• Backlit screen for visibility in low-light conditions.
• Audible alert for circuit continuity tests below 50 Ω.
• Separate settings for diode and circuit continuity tests.
• Includes measuring probes with a length of 14.5 cm.
• Cable length with probes: 97 cm.
• Cable diameter including insulation: 3.5 mm.
• Overload protection in construction.
• ABS plastic housing.
• Automatic shutdown after 15 minutes of inactivity.
• Option to disable automatic shutdown.
• Low battery indicator present.
• Power supply: two 1.5 V (AAA) batteries.