User Manual
High Resolution Benchtop MilliOhm Meter
Models 380560 and 380562
Additional User Manual Translations available at www.extech.com
Introduction
Congratulations on your purchase of the Extech 380560 (117V) or 380562 (220V) High Resolution
MilliOhm Meter. This device offers seven resistance ranges with resolution as low as 0.01m
Ω.
The 4-wire Kelvin clip connection ensures optimum accuracy. The built-in comparator feature offers HI-LO-GO testing. Typical applications include transformer, motor coil, and PC Board resistance measurements. Careful use of this meter will provide years of reliable service.
Meter Description
1. LED Display
2.
3.
4.
5.
6.
HI/LO/GO Status Indicators
Power and Range pushbuttons
Kelvin clip leads
SET/TEST and HI/LO pushbuttons
Comparator adjustment screws
1
2
3
4
5 6 7
7. Kelvin clip lead input terminals
Note: The power cable input and audible alert button are on the rear of the instrument.
Measurement Precautions
Ensure that the meter is connected to the correct power source
(110V for model 380560 or 220V for model 380562).
Do not apply voltage to the meter input terminals. Meter damage may result.
2 380560-en-GB_V1.9 2/17
Measurement Procedure
1. Connect the Kelvin test leads to the meter.
2. Press the POWER pushbutton to turn power on.
F-F-F-F-F-F-F-F-F-
4. To check the meter zero, clip the test leads
5. Select the desired measuring range using the labeled black pushbuttons. When the resistance of
Current
6. Clip the leads onto the device under test as shown below.
Current
Comparator Operation (HI-LO-GO)
Current
Current
Measurement Principles
Current
Current
Current
F-F-F-F-F-F-F-F-F-
1. Position the SET/TEST pushbutton to SET.
2. Position the LO/HI pushbutton to LO. Current
4. Position the LO/HI pushbutton to HI.
GO measurement. measurement is lower than the LO setting, the LO LED will light. If the measurement is higher than
Current Current
LED will light. If the rear beeper pushbutton is set ON, an audible tone will sound each time a GO
Current Current only, thus eliminating the lead and contact resistances. The meter displays the resistance based on Current
F+ F+F+F+F+F+F+F+F+F+
F-F-F-F-F-F-F-F-F-
S+S+S+S+S+S+S+S+S+
Rx
Current
S+S+S+S+S+S+S+S+S+
F-F-F-F-F-F-F-F-F-
F-
F+F+F+F+F+F+F+F+F+
F+F+F+F+F+F+F+F+F+ terminal. The S+ and S- (SENSE) terminals measure the voltage drop across the device under test F-F-F-F-F-F-F-F-F-
S+ S+S+S+S+S+S+S+S+S+
S-
Rx is the resistance of the device under test.
F+ Rx = Vx / Is
Where:
Vx is the voltage drop across the device under test;
F+F+F+F+F+F+F+F+F+
F-
Current
Current
Current
Current
V
Current
3 380560-en-GB_V1.9 2/17 o ts
Specifications
General Specifications
Circuit
Display
Connection type
Measurement ranges
Test voltage
Comparator
Measurement speed
Zero adjust
Over-range indication
Operating Temperature
Operating Humidity
Power Supply
Weight
Dimensions
Replacement Kelvin leads
Custom one-chip LSI microprocessor circuit
20 mm (0.8") 2000 Count LED Display
4-Terminal Kelvin
Seven ranges (see listing below)
5V DC
Built-in HI/LO/GO testing with audible beeper
Resistance 1 second, comparator mode 0.5 seconds
Automatic (no adjustment necessary)
Display reads "1____" when the reading is out of range
0°C to 50°C (32°F to 122°F)
Max. 80% RH
110V (380560) or 220V (380562) ±15%, 50/60Hz
2.2kg (4.85 lbs)
280 x 210 x 90mm (11 x 8.3 x 3.5")
380465
Range Specifications
Range
20 m
Ω
200 m
Ω
2
Ω
20
Ω
200
Ω
2K
Ω
20K
Ω
Resolution
0.01m
Ω
0.1m
Ω
.001
Ω
.01
Ω
0.1
Ω
.001k
Ω
.01k
Ω
Test Current
1A
1A
0.1A
10mA
1mA
0.1mA
10uA
Accuracy (%rdg)
± (0.2% + 6 digits)
± (0.2% + 4 digits)
Note: Specifications based on RF Field Strength <3V/m and frequency <30MHz
International Symbols
Test Voltage
2.7V DC
3.3V DC
3.5V DC
4.1V DC
4.5V DC
Copyright © 2012-2017 FLIR Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form
ISO-9001 Certified
www.extech.com
4 380560-en-GB_V1.9 2/17
