Extech Instruments 380460 Manuel utilisateur

User Guide

Precision Milliohm Meters

Models 380460 and 380462

380460/380462-en-GB_v2.5 8/15

Introduction

Congratulations on your purchase of the Extech Milliohm Meter Model 380460 (110V) or Model

380462 (220V). The milliohm meters are enclosed in rugged carrying cases for durability.

Measurements are made with Kelvin test leads (supplied) for optimal accuracy in five (5) selectable

ranges. Careful use of this meter will provide years of reliable service.

Meter Description

1. LCD Display

2. Zero adjust knob

3. Range Dial

4. Power switch

5. 200mselect switch

6. AC power cord

7. Kelvin lead to meter connections

8. Carrying case

380460/380462-en-GB_v2.5 8/15

Operation

Basic Principles of 4-wire Measurements

For each range, the meter provides a specific amount of test current (refer to General Specifications)

which flows from the HI to the LO meter terminal and therefore from the HI to the LO clip lead (Refer

to the diagram). This is the current that ultimately passes through the device under test (RX in

diagram below).

Once the test current is applied to the device under test, clip leads Rx1 & Rx2 measure the voltage

drop across the device under test. The following equations detail how the meter accomplishes its

measurement tasks.

Measurement Equations

Vx = Is x Rx;

Where Vx is the voltage (measured by the meter) across the device under test; Is is the test current;

Rx is the resistance of the device under test. From Vx = Is x Rx, the meter moves to the next step

which is: Rx = Vx/Is. With this equation the meter determines the resistance of the device under test.

Note that the measured resistance (Rx1 & Rx2) is not affected by stray resistance since the test

current is supplied directly to the device under test. This is the advantage of the 4-wire Kelvin lead

configuration over 2-wire methods which introduce errors into low resistance measurements.

International Symbols

LO HI

Rx1 Rx2

White

bands

Device under test

To Meter

380460/380462-en-GB_v2.5 8/15

Powering the Meter

Connect the meter to the correct power source (110 or 220VAC); the Model 380460 uses 110VAC

and the Model 380462 uses 220VAC (note that these meters are NOT interchangeable). Do not

apply voltage to the meter input measurement terminals. Meter damage may result.

Measurement Procedure

1. Rotate the Range select switch to the desired range.

2. When using the 200m range, put the 200m select switch to the 200m position; for all other

measurement ranges put this switch in the opposite position

3. Perform a Zero Adjustment per the following:

Short the Kelvin Clips as shown in the diagram below.

(Make sure that the clips are clean)

Rotate the Zero Adjust Knob until the meter indicates zero units.

4. Either attach the test leads onto a component or attach the leads between two points on a

circuit.

5. Observe the meter reading.

380460/380462-en-GB_v2.5 8/15

Specifications

General Specifications

Circuit Custom one-chip LSI microprocessor circuit

Display 18 mm (0.7") LCD with 2000 display counts

Measurement terminals 4-Terminal Kelvin type

Measurement ranges Five (5) ranges (200m, 2, 20, 200, 2000ohms)

Zero Adjust ±50 count adjustment

Sampling Time Approximately 0.4 seconds

Over range indication Indication of "1 "

Operating Temperature 0 °C to 50 °C (32 °F to 122 °F)

Operating Humidity 80% Relative Humidity max.

Power Supply 110V (380460) or 220V (380462) ±15%, 50/60Hz

Power Consumption Less than 2 VA

Weight 694g (1.53 lbs.)

Dimensions 167 x 122 x 85 mm (6.6 x 4.8 x 3.4") with cover

Accessories Power Cable and 4-wire Kelvin clip leads(380465)

Range Specifications

Range

Resolution

Test

Current

Accuracy

Open Circuit

Voltage

200 m0.1m100mA ± 0.75% + 4 digits 4.4V

2 1m10mA ± 0.75% + 2 digits 3.6V

20 10m10mA ± 0.75% + 2 digits 3.6V

200 0.1 1mA ± 0.75% + 2 digits 3.5V

2000 1 1mA ± 0.75% + 2 digits 3.5V

Note: Specifications tested using RF Field Strength <3V/m and frequency <30MHz

ISO‐9001Certified

www.extech.com

Ce manuel convient aux modèles suivants

Table des matières

Autres manuels Extech Instruments Instrument de mesure

Extech Instruments

Extech Instruments PQ34-12 Manuel utilisateur

Extech Instruments

Extech Instruments 401025 Manuel utilisateur

Extech Instruments

Extech Instruments ExStik RE300 Manuel utilisateur

Extech Instruments

Extech Instruments 407119-NIST Manuel utilisateur

Extech Instruments

Extech Instruments MO257 Manuel utilisateur

Extech Instruments

Extech Instruments CO220 Manuel utilisateur

Extech Instruments

Extech Instruments 380942 Manuel utilisateur

Extech Instruments

Extech Instruments HD600 Manuel utilisateur

Extech Instruments

Extech Instruments 461830 Manuel utilisateur

Extech Instruments

Extech Instruments MA145 Manuel utilisateur

Extech Instruments

Extech Instruments 407790A Manuel utilisateur

Extech Instruments

Extech Instruments SDL800-NIST Manuel utilisateur

Extech Instruments

Extech Instruments GRT300 Manuel utilisateur

Extech Instruments

Extech Instruments MO210 Manuel utilisateur

Extech Instruments

Extech Instruments MA1500 Manuel utilisateur

Extech Instruments

Extech Instruments MO297 Manuel utilisateur

Extech Instruments

Extech Instruments SDL710 Manuel utilisateur

Extech Instruments

Extech Instruments LT10 Manuel utilisateur

Extech Instruments

Extech Instruments 407119 Manuel utilisateur

Extech Instruments

Extech Instruments 407738 Manuel utilisateur

Extech Instruments

Extech Instruments HD450 Manuel utilisateur

Extech Instruments

Extech Instruments 45160 Manuel utilisateur

Extech Instruments

Extech Instruments MO265 Manuel utilisateur

Extech Instruments

Extech Instruments TM100-NIST Manuel utilisateur

Manuels Instrument de mesure populaires d'autres marques

Suaoki

Suaoki D40 Manuel utilisateur

Elster

Elster BK-G1.6 Manuel utilisateur

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuel

Duratool

Duratool D03128 Manuel utilisateur

Vega

Vega VEGAPULS 65 Manuel utilisateur

Tonghui

Tonghui TH2618B Manuel utilisateur

Tenmars

Tenmars TM-801 Manuel utilisateur

MSR

MSR 145 Manuel utilisateur

TPS

TPS WP-82 Manuel utilisateur

ELMETRON

ELMETRON CP-511 Manuel utilisateur

PCB Piezotronics

PCB Piezotronics 003C30 Manuel utilisateur

Tenma

Tenma 72-10465 Manuel utilisateur

Endress+Hauser

Endress+Hauser Proline Promag 50 Caractéristiques techniques

Siemens

Siemens SITRANS F Coriolis FCT030 Manuel de la liste des pièces

KLINGER

KLINGER CMF V Series Manuel utilisateur

EXFO

EXFO FTB-2 Manuel d'exploitation et d'entretien

Keysight

Keysight M8290A Manuel utilisateur

ADTEK

ADTEK MW-5 Manuel utilisateur