AEMC 6250 Manuel utilisateur

MICRO-OHMMETER 6250

ENGLISH User Manual

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Statement of Compliance

Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments

certiﬁes that this instrument has been calibrated

using standards and instruments traceable to

international standards.

We guarantee that at the time of shipping your

instrument has met its published speciﬁcations.

An NIST traceable certiﬁcate may be

requested at the time of purchase, or obtained

by returning the instrument to our repair and

calibration facility, for a nominal charge.

The recommended calibration interval for this

instrument is 12 months and begins on the date of

receipt by the customer.

Serial #: ________________________________

Catalog #: 2129.81

Model #: 6250

Please ﬁll in the appropriate date as indicated:

Date Received: _________________________________

Date Calibration Due: _______________________

Chauvin Arnoux®, Inc.

d.b.a AEMC®Instruments

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READ CAREFULLY BEFORE

USING FOR THE FIRST TIME

Your instrument is equipped with a NiMH battery. This technology o󰀨ers several

advantages:

• Long battery charge life for a limited volume and weight.

• Possibility of quickly recharging your battery.

• Signicantly reduced memory e󰀨ect: you can recharge your

battery even if it is not fully discharged.

• Respect for the environment: no pollutant materials such as lead

or cadmium, in compliance with the applicable regulations.

After prolonged storage, the battery may be completely discharged. If so, it must

be completely recharged.

Your instrument may not function during part of this recharging operation.

Full recharging of a completely discharged battery may take several hours.

NOTE: In this case, at least 5 charge/discharge cycles will be necessary

for your battery to recover 95% of its capacity.

To make the best possible use of your battery and extend its e󰀨ective service life:

• Only use the charger supplied with your instrument. Use of

another charger may be dangerous.

• Only charge your instrument at temperatures between 0° and 40°C.

• Comply with the conditions of use dened in the operating manual.

• Comply with the storage conditions specied in the operating

manual.

NiMH technology allows a limited number of charge/discharge cycles depending

signicantly on:

• The conditions of use.

• The charging conditions.

Please refer to § 9 for correct replacement of the battery.

Do not dispose of the battery pack with other solid waste. Used batteries

must be entrusted to a qualied recycling company or to a company

specialized in processing hazardous materials.

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Micro-Ohmmeter Model 6250

Table of Contents

1. INTRODUCTION ................................................................................. 5

1.1 International Electrical Symbols................................................6

1.2 Denition of Measurement Categories .....................................6

1.3 Receiving Your Shipment..........................................................6

1.4 Ordering Information.................................................................7

1.4.1 Accessories and Replacement Parts............................7

2. PRODUCT FEATURES......................................................................... 8

2.1 Description................................................................................8

2.2 Applications ..............................................................................9

2.3 Key Features ............................................................................9

2.4 Control Features .....................................................................10

2.5 Button Functions..................................................................... 11

2.6 Display Symbols .....................................................................12

3. SPECIFICATIONS ............................................................................. 14

3.1 Electrical .................................................................................14

3.2 Mechanical..............................................................................15

3.3 Display ....................................................................................15

3.4 Environmental.........................................................................16

3.5 Safety......................................................................................16

4. OPERATION..................................................................................... 17

4.1 Quick Summary ......................................................................17

4.2 Instrument Conguration (SET-UP Mode) ..............................19

4.2.1 Program Menu Tree....................................................19

4.2.2 Programming the 9-Pin Interface Port (rS) ................20

4.2.3 Setting the Buzzer Level (bUZZ) ................................21

4.2.4 Reading the Internal Serial Number (EdSn) ...............21

4.2.5 Reading the Internal Software Version (EdPP)...........21

4.2.6 Setting Language for Printing Reports (LAnG) ...........22

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Micro-Ohmmeter Model 6250

4.2.7 Setting the Value for Reference Temperature.............22

4.2.8 Selecting the Method/Value for Ambient Temp ...........23

4.2.9 Selecting the Metal Type (nEtA) .................................24

4.2.10 Programming the Alpha Value (ALPH)........................24

4.2.11 Selecting Temperature Units (dEg) .............................24

4.2.12 Setting Alarm Set Point/Direction/Buzzer Level..........25

4.2.13 Setting the Display Timeout (LlgH) .............................26

4.2.14 Clearing the Memory (nEn).........................................26

4.3 Operating Procedure ..............................................................28

4.3.1 Connections and Readings.........................................28

4.3.2 Test Lead Connection .................................................29

4.3.3 Very Low Resistance ..................................................29

4.3.4 Meter Readings ..........................................................29

4.3.5 Stand-by (ST BY) State ..............................................30

4.4 Selecting the Test Range........................................................30

4.5 Measurement Modes ..............................................................31

4.5.1 Measurement Safety Warnings...................................31

4.5.2 Inductive Resistance Measurement Mode..................31

4.5.3 Resistance Measurement Mode .................................33

4.5.4 Low Inductive Resistance Measurement Mode ..........34

4.6 Ambient Temperature Compensation .....................................35

4.6.1 Activating the Compensation Function ......................38

4.7 Activating Alarms ....................................................................39

5. MEMORY / PRINTING ...................................................................... 40

5.1 Managing and Printing the Data in Memory .........................40

5.2

Displaying and Printing Stored Measurements ...............................41

5.3 Cables and Printers Used with the Interface Port...................43

6. DATAVIEW®SOFTWARE................................................................... 45

6.1 Installing DataView®................................................................45

6.2 Connecting the Instrument to your Computer.........................49

6.3 Establishing Communication to the Instrument ......................49

6.4 Conguring the Instrument .....................................................50

6.5 Downloading Stored Tests ......................................................52

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Micro-Ohmmeter Model 6250

6.6 Creating a DataView®Report .................................................52

6.7 Exporting the Report to a Spreadsheet or PDF File ..............53

7. TROUBLESHOOTING ........................................................................ 54

7.1 Fault Indicators .......................................................................54

8. APPLICATION EXAMPLES................................................................ 55

8.1 Measuring Winding Resistance of Motors

and Transformers....................................................................55

8.2 Measuring Resistance on Electric Motors ..............................56

8.3 Battery Strap Measurements ..................................................56

9. MAINTENANCE................................................................................ 57

9.1 Warning...................................................................................57

9.2 Cleaning..................................................................................57

9.3 Charging/Recharging the Battery ...........................................58

9.4 Battery and Fuse Replacement ..............................................59

Limited Warranty .............................................................................61

Warranty Repairs ............................................................................61

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Micro-Ohmmeter Model 6250

CHAPTER 1

INTRODUCTION

WARNING

These safety warnings are provided to ensure the safety of person-

nel and proper operation of the instrument.

• Do not attempt to perform any tests with this instrument until you

have read the user manual.

• Tests are to be carried out on de-energized circuits only! Never

connect the unit to a live circuit.

• When the unit is measuring resistance showing a high inductive

component (transformers, motors, etc.) after ending the measure-

ment, the unit then discharges the inductive sample and the

warning icon appears for the entire duration. Never disconnect

the connection wires before this icon disappears.

• The micro-ohmmeter should never be used in an explosive

environment (this includes poorly ventilated battery rooms and

enclosures).

• Make sure the internal battery is fully charged prior to testing. If the

instrument has been left unused for several months, recharge the

battery.

• We recommend recharging the micro-ohmmeter every month to

ensure a full battery charge when used.

• When replacing fuses, install only fuses which are direct replace-

ments.

• If the case needs cleaning, do not use any alcohol or oil based

cleaners. Preferably use soapy water with a damp cloth or

sponge.

• The test leads and measuring wires must be in good condition and

should be changed if there is any evidence of deterioration (insula-

tion split, burnt, etc.).

• Never exceed the safety values indicated in the specications.

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Micro-Ohmmeter Model 6250

1.1 International Electrical Symbols

This symbol signiﬁes that the instrument is protected by double or rein-

forced insulation.

CAUTION - Risk of Danger! Indicates a WARNING and that the operator must

refer to the user manual for instructions before operating the instrument in all

cases where this symbol is marked.

Important instructions to read and understand completely.

Important information to acknowledge.

Risk of electric shock. The voltage at the parts marked with this symbol may

be dangerous.

Compliance with the Low Voltage & Electromagnetic Compatibility European

directives (73/23/CEE & 89/336/CEE)

In the European Union, this product is subject to a separate collection system

for recycling electrical and electronic components In accordance with directive

WEEE 2002/96/EC

1.2 Deﬁnition of Measurement Categories

CAT II: For measurements performed on circuits directly connected to

the electrical distribution system. Examples are measurements

on household appliances or portable tools.

CAT III: For measurements performed in the building installation at

the distribution level such as on hardwired equipment in xed

installation and circuit breakers.

CAT IV: For measurements performed at the primary electrical supply

(<1000V) such as on primary overcurrent protection devices,

ripple control units, or meters.

1.3 Receiving Your Shipment

Upon receiving your shipment, make sure that the contents are consistent

with the packing list. Notify your distributor of any missing items. If the equip-

ment appears to be damaged, le a claim immediately with the carrier and

notify your distributor at once, giving a detailed description of any damage.

Save the damaged packing container to substantiate your claim.

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Micro-Ohmmeter Model 6250

1.4 Ordering Information

Micro-ohmmeter Model 6250............................................ Cat. #2129.81

Includes extra large tool bag, set of two 10ft Kelvin clips (10A - Hippo), one RS-232 DB9 F/F

6 ft null modem cable, RS-232 to USB adapter, US 115V power cord, quick reference guide,

one pad of measurement result forms, NiMH rechargeable 6V battery pack, and USB stick

supplied with product user manual and DataView®software.

1.4.1 Accessories and Replacement Parts

Kelvin clips (10A Hippo), 10 ft color-coded leads ................ Cat. #1017.84

Kelvin clips (10A Hippo), 20 ft color-coded leads ................ Cat. #2118.70

Kelvin probes (1A), spring loaded, 10 ft color-coded leads

with banana plug terminations............................................. Cat. #2118.73

Kelvin probes (1A), spring loaded, 20 ft color-coded leads

with banana plug terminations............................................. Cat. #2118.74

Kelvin Probes Pistol Grip 10 ft (10A) Spring Loaded........... Cat. #2118.75

Kelvin Probes 10 ft (10A) Spring Loaded ........................... Cat. #2118.77

Kelvin Clips 10 ft (1-10A)..................................................... Cat. #2118.79

Kelvin Clips 20 ft (1-10A)..................................................... Cat. #2118.80

Cable, PC RS-232, DB9 F/F 6 ft Null Modem Cable........... Cat. #2119.45

Replacement Battery 6V, 8.5 Ah rechargeable NiMH .......... Cat. #2129.91

Measurement Result Forms, replacement set of two.......... Cat. #2129.94

RTD temperature probe.......................................................Cat. #2129.95

RTD temperature probe with 7 ft (2m) extension cable....... Cat. #2129.96

Fuse, set of 3, 16A/250V, 1 1/4 x 1/4" (6.3x32mm)

fast blow....................................................................................... Cat. #2129.98

Fuse, set of 10, 2A/250V, 3/4 x 3/16" (5x20mm) fast blow.. Cat. #2129.99

Extra large classic tool bag..................................................Cat. #2133.73

Inverter – 12VDC to 120VAC 200 Watt for vehicle use......... Cat. #2135.43

115V Power Cord ................................................................ Cat. #5000.14

Adapter – RS-232 to USB 2.0 ............................................. Cat. #5000.60

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Micro-Ohmmeter Model 6250

CHAPTER 2

PRODUCT FEATURES

2.1 Description

The Model 6250 Micro-ohmmeter is used to perform low resistance

measurements from 1μΩto 2500Ω. There are seven ranges with test

currents from 1mA to 10A.

The front end of the micro-ohmmeter employs a four-wire Kelvin congu-

ration, which eliminates test lead resistance for a measurement accuracy

of 0.05%. A built-in circuit lters out AC signals.

The Model 6250 Micro-ohmmeter is packaged in a sealed eld case well

suited for shop and eld use. Power is supplied by a long-life NiMH battery

pack with a built-in recharger (110/220V).

The large, easy-to-read liquid crystal display is 2.25 x 4.00". It displays

the value of resistance, metal type, reference and ambient temperatures

(if selected), alarm conditions (if selected), test current and range and test

mode (Resistive, Inductive or Auto).

For operator safety and instrument protection, the micro-ohmmeter is

fuse protected at the inputs. Two fuses, accessible behind the front panel,

protect against stored energy in inductive loads.

Enhanced internal circuitry protects against possible inductive kickback

when the current is shut o󰀨.

A built-in thermal switch protects the micro-ohmmeter against overheating

on the 10A range when in continuous use.

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