Overview
This Operating Manual covers information on safety and
cautions. Please read the relevant information carefully
and observe all the Warnings and Notes strictly.
Warning
To avoid electric shock or personal injury, read the
"Safety Information" and "Rules for Safe Operation"
carefully before using the Meter.
The Model UT90A (hereafter referred to as “the Meter”)
is a 1999 counts 3 1/2 digits multimeter with stabilized
functions, safe design, and reliable performance.
In addition to the conventional measuring function, such
as DC/AC voltage, DC/AC current, resistance, diode and
continuity, it is also a highly applied digital electrical tester
of good performance with battery test, large LCD full
icons display, full overload protection and streamline
outlook.
Table of Contents
Title Page
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
Rotary Switch
Functional Buttons
Display Symbols
Measurement Operation
A. DC Voltage Measurement
B. AC Voltage Measurement
C. DC Current Measurement
D. AC Current Measurement
E. Resistance Measurement
F. Testing Diodes & Continuity
G. Battery Test
General Specifications
Accuracy Specifications
A. DC Voltage
B. AC Voltage
C. DC Current
D. AC Current
E. Resistance
F. Diodes & Continuity Test
Maintenance
A. General Service
B. Replacing the Fuses
C. Replacing the Battery
Model UT90A: OPERATING MANUAL
3
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