UNI-T UT90B, Operating Manual

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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 UT90B (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 equipped with advanced design of charging
power through 220V AC or 12-36V AC/DC or solar energy.
With such design, the Meter can be used without battery,
therefore it will not cause chemical pollution. This is also
a highly applied digital electrical tester of good
performance with full icons display LCD, 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 & AC Voltage Measurement
B. AC & DC Current Measurement
C. Test for Diodes & Continuity
D. Resistance Measurement
E. Power Charging
The
Impedance Changeover Button
The POWER Button
General Specifications
Accuracy Specifications
A. DC Voltage
B. AC Voltage
C. AC Current
D. DC Current
E. Diodes & Continuity Test
F. Resistance
Maintenance
A. General Service
B. Replacing the Fuses
Model UT90B: OPERATING MANUAL
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