User's Guide
Visit us at www.TestEquipmentDepot.com
Back to the Extech 380560 Product Page
High Resolution Benchtop MilliOhm Meter
Models 380560 and 380562
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
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 0.01mΩ. The 4-wire Kelvin clip connection ensures optimum accuracy. The builtin 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.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX 781.665.0780 - TestEquipmentDepot.com
or consequential damages. Extech's total liability is limited to repair o r replacement of the product. The warranty set fort h
above is inclusive and no other warranty, whether written or oral, is expressed or implied.
Specifications
General Specifications
Circuit Custom one-chip LSI microprocessor circuit
Display 0.7" (18 mm) 2000 Count LED Display
Connection type 4-Terminal Kelvin
Measurement ranges Seven ranges (see listing below)
Test voltage 5V DC
Comparator Built-in HI/LO/GO testing with audible beeper
Zero adjust Automatic (no adjustment necessary)
Over-range indication Display reads "1____" when the reading is out of range
Operating Temperature 32°F to 122°F (0°C to 50°C)
Operating Humidity Max. 80% RH
Power Supply 110V (380560) or 220V (380562) ±15%, 50/60Hz
Weight 4.85 lbs (2.2kg)
Dimensions 11 x 8 x 3.5" (280 x 210 x 90mm)
Range Specifications
Range Resolution Test Current Accuracy (%rdg) Test Voltage
20 mΩ 0.01mΩ
200 mΩ 0.1mΩ
2 Ω .001Ω
20 Ω .01Ω
200 Ω 0.1 Ω
2K Ω .001kΩ
20K Ω .01kΩ
1A
1A 3.3V DC
0.1A 3.5V DC
10mA 4.1V DC
1mA
0.1mA
10uA
Note: Specifications based on RF Field Strength <3V/m and frequency <30MHz
International Symbols
± (0.2% + 6 digits) 2.7V DC
± (0.2% + 4 digits)
4.5V DC
2
380560, Version 1.6, 04/03
Meter Description
1. LED Display
2. HI/LO/GO Status Indicators
3. Power and Range pushbuttons
4. Kelvin clip leads
5. SET/TEST and HI/LO pushbuttons
6. Comparator adjustment screws
7. Kelvin clip lead input terminals
1
2
3
4
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.
Measurement Procedure
1. Connect the Kelvin test leads to the meter.
2. Press the POWER pushbutton to turn power on.
3. Position the SET/TEST pushbutton to the TEST position.
4. To check the meter zero, clip the test leads
together as shown at right.
5. Select the desired measuring range using
the labeled black pushbuttons. When the resistance of the device is unknown, start
with the highest range and work downward.
F+
S+
White Bands
5 6 7
F-
S-
6. Clip the leads onto the device under test as shown below.
7. Observe the reading on the LED display.
F + S+ S - F -
3
Rx
380560, Version 1.6, 04/03
Comparator Operation (HI-LO-GO)
The meter is equipped with a Comparator function allowing the user to sort resistance
measurements against programmable HIGH and LOW limits. To program the comparator:
1. Position the SET/TEST pushbutton to SET.
2. Position the LO/HI pushbutton to LO.
3. Adjust the LO comparator screw to the desired low limit (shown on the LED display).
4. Position the LO/HI pushbutton to HI.
5. Adjust the HI comparator screw to the desired high limit.
6. Position the SET/TEST pushbutton to TEST.
7. Set the rear buzzer switch ON or OFF. When ON, the meter will sound an audible tone
for each GO measurement.
Each time a measurement is taken, the appropriate Comparator status LED will light. If the
measurement is lower than the LO setting, the LO LED will light. If the measurement is
higher than the HI setting, the HI LED will light. If the reading is between the HI and LO
settings, the green GO LED will light. If the rear beeper pushbutton is set ON, an audible
tone will sound each time a GO reading is detected.
Measurement Principles
The test current flows through the resistance from the FORCE+ (F+) terminal to the
FORCE- (F-) terminal. The S+ and S- (SENSE) terminals measure the voltage drop across
the device under test only, thus eliminating the lead and contact resistances. The meter
displays the resistance based on the test current and the measured voltage; refer to the
equation below:
Rx = Vx / Is
Where:
Vx is the voltage drop across the device under test;
Is is the test current;
Rx is the resistance of the device under test.
Calibration and Repair Services
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX 781.665.0780 - TestEquipmentDepot.com
Loading...