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UT90A
UNI-T UT90A User Manual
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20
Measurement Operation
(7)
E. Measuring Resistance
(see figure 5)
W
arning
T
o avoid damages to the Meter or to the devices
under test, disconnect circuit power and discharge
all the high-voltage capacitors before measuring
resistance.
red black
( figure 5)
Model UT90A:
OPERA
TING M
ANUAL
19
21
Table of Contents
Table of Contents
1
Overview
3
Unpacking Inspection
4
Safety Information
5
Rules for Safe Operation
6
International Electrical Symbols
8
The Meter Structure
9
Rotary Switch
9
Functional Buttons
11
Display Symbols
12
Measurement Operation
14
DC Voltage Measurement
14
AC Voltage Measurement
16
DC Current Measurement
17
AC Current Measurement
19
Resistance Measurement
21
Testing Diodes & Continuity
22
Battery Test
24
General Specifications
26
Accuracy Specifications
28
DC Voltage
28
AC Voltage
28
DC Current
29
AC Current
29
Resistance
30
Diodes & Continuity Test
30
Maintenance
31
General Service
31
Replacing the Fuses
31
Replacing the Battery
32
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UNI-T UT90A Specifications
General
Brand
UNI-T
Model
UT90A
Category
Multimeter
Language
English
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