Phenix Technologies MRM-10 Manuale utente

MRM-10

User’s Manual

MRM-10

Digital micro-ohmmeter

Phenix Technologies, Inc

75 Speicher Drive

Accident, MD 21520

GF-2016

Rev 11/14/2016 nab

MRM-10



SECTION 1: DANGER / GENERAL SAFETY PRECAUTIONS

WARNING !!

Complete Grounding of this unit is necessary for the safe operation of this equipment.

Disconnect inputs before ungrounding this equipment.

MRM-10

GENERAL SAFETY PRECAUTIONS





HIGH VOLTAGE

This equipment is capable of providing POTENTIALLY LETHAL VOLTAGES! Improper

operation or test practices may result in injury or death to the operator or surrounding

personnel.

The operation of High Voltage test equipment should only be performed by personnel

familiar with HIGH VOLTAGE testing and safety procedures. The operator of this

equipment must be aware of all hazards associated with High Voltage testing. The

operator is responsible for himself and others in close proximity of the testing area.

Some General Safety Practices for working with High Voltage Test Equipment have

been listed below for your reference.

Become familiar with your instrument before performing an actual test

Know your work area, check that all circuits are de-energized and locked out.

Never work alone; always work with another qualified worker.

Mark off entire work area with barriers and warning tape.

Make all personnel aware of your testing activities.

Be aware of dangerous conditions that may arise from energizing a test

specimen.

Never modify test equipment; modifications to equipment could introduce an

unknown hazard or hinder a designed-in safety feature.

DO NOT operate damaged equipment. Remove power and do not use the

equipment until safe operation can be verified by service-trained personnel.

Phenix Technologies, Inc. assumes no liability for unsafe or improper use of test equipment.

MRM-10

Specific Safety Precautions

This equipment should be operated only by qualified and duly trained people, closely observing the

corresponding safety regulations and instructions contained in this User’s Manual.

Check that the item to be measured is voltage free.

Before starting with the measurements, be sure that the battery is well charged and that the line voltage is

between specified limits.

Do not connect or disconnect the test leads during the measurement.

There are no adjustable parts or parts that can be replaced by the user within the equipment.

WARNING:

Taking out the Control Panel in order to have an access to the internal parts may be dangerous as there are

high voltages inside, capable of causing fatal accidents.

Cleaning of this instrument should be carried out using a soft cleaning liquid, after verifying that it doesn't

attack the plastic parts used in the case and in the Control Panel of this equipment.

This equipment should be used only by a trained and

competent person, strictly applying suitable safety

rules.

Used symbols

Caution, refer to User Guide.

Equipment complies with current EU Directives.

The rubbish bin with a line through it means that in the European Union,

the product must undergo selective disposal for the recycling of electric

and electronic material, in compliance with Directive WEEE 2002/96/EC.

MRM-10

TABLE OF CONTENTS

SAFETY PRECAUTIONS

1. DESCRIPTION ............................................................................. 6

1.1. OPERATING PRINCIPLE ...................................................... 6

2. CONTROL PANEL ....................................................................... ` 7

3. POWER SUPPLY......................................................................... 8

3.1. BATTERY CONDITION.......................................................... 8

3.2. BATTERY CHARGER............................................................ 8

4. MEASUREMENT.......................................................................... 9

5. MESSAGES.................................................................................. 10

6. SOME NOTES ABOUT ACCURACY........................................... 11

7. RS232 OUTPUT........................................................................... 12

8. CLEANING ................................................................................... 13

9. REPLACEMENT FUSE................................................................ 14

10. TECHNICAL SPECIFICATIONS ................................................ 15

11. CUSTOMER COMMENTS / SUGGESTIONS ........................... Error! Bookmark not defined.

MRM-10

1. Description

The MRM-10 micro-ohmmeter is a portable, microprocessor controlled instrument, used to accurately measure

very low contact resistances of breakers and switches, bus bars, transformers and engine windings, etc, with

test currents from 1mA to 10A.

Kelvin architecture (four-terminal method).

Digital reading, alphanumeric display.

Up to 4½ digits readings.

Powered by rechargeable battery or mains supply.

1 µΩresolution.

200 Ωmaximum reading.

1.1. Operating Principle

This device uses the Kelvin Bridge architecture, with four terminals, avoiding testing leads resistance to cause

error during measurement. The operator may choose test current and the reading is obtained by comparison

through internal high-stability standards. The result appears in the alphanumeric display that is very easy to

read.

MRM-10

2. Control Panel

1. Fuse 13. Test Current Control

2. Power Cord Connector 14. Battery Key (measures battery charge condition)

3. Ground 15. STOP Key

4. RS-232 Data Output 16. START Key

5. Current Terminal (C+) 17. Hold Key (retains last measurement in the display)

6. Potential Terminals (P+ P-)

7. Current Terminal (C-)

8. ON / OFF Switch

9. Displays both measured resistance value

& messages

10. ON Indicator LED

11. Battery Charge Iindicator

12. Range & Test Current Selector

MRM-10

3. Power Supply

Mains supply or internal battery powered

Battery: rechargeable, 12 V - 7 Ah.

Mains: 100 - 240 V~

At the end of the useful life, the battery has to be recycled or

disposed of properly in order to take care of the environment.

3.1. Battery Condition

The charge condition of the battery can be verified before or during the resistance measurement. In order to

achieve that, the operator has to press the battery key while the equipment is turned on. The bar graph shows

remaining charge as a percentile value. If during measurement the charge reaches a critical level, the display

will show the BAT message notifying that the charge level is low. After a few minutes the measurement will be

automatically interrupted in order to preserve the battery from a deep discharge that is prejudicial for its

expected useful life.

3.2. Battery Charger

The built-in battery charger is always active when the equipment is connected to the mains supply, even if the

On/Off switch is turned off.

Charging procedure:

Check that the On/Off switch is in Off.

Connect the equipment to the mains supply.

The battery charge indicator will display a red light up to completing the charge. At that point, it will change

to a green light, and remain so until the equipment is disconnected from the mains supply.

MRM-10

4. Measurement

Check that the item to be measured is voltage free.

1. Before turning the equipment on, connect the test leads to the item to be measured and to the front panel

terminals.

2. Using the test current selector, choose the range and the current to be used.

3. Choose the power supply to use. If you are going to use the battery, advance to the following point. If you

are going to use the mains supply, plug the power cord into the connector.

4. Switch the equipment On using the On/Off.

5. The PRESS START message will appear showing that measurement can be started. Press the Start key.

Depending on the position of the test current control the LOW CURRENT message will turn up.

6. Turning the test current control clockwise increases the current. Adjust this control until obtaining the

desired value or until the current indicator (bar graph) indicates 100%. The bar graph will show the test

current value as a percentage of the nominal value selected by using the test current selector.

7. The lowest current for measuring is 10% of the nominal value. It is important to consider that the

measurement errors increase while test current decreases. The equipment accuracy is specified for test

currents higher than 80%.

8. The display will show the resistance value measured and the corresponding unit (Ω [ohms], mΩ [milli-

ohms] or µΩ [micro-ohms]).

9. The value can be retained in the display by pressing the hold key. Pressing this key again releases the

value.

10. Press the Stop key in order to finish the measurement. Do not turn Off the equipment without pressing the

Stop key.

11. Finally, after finishing measurements, turn the equipment Off using the On/Off switch.

CAUTION: Do not connect or disconnect the test leads

during the measurement.

MRM-10

5. Messages

The opening message displays Phenix MRM 10. When turning the equipment On using the On/Off switch,

this introductory message briefly appears. During that time, the equipment carries out some functional checks.

WAIT...

This message appears each time the equipment needs to adjust any parameter in order to optimize the

readings.

PRESS START

The equipment is ready to start a measurement, thus the operator has to press the Start key.

LOW CURRENT

It shows that the test current is not enough to carry out the reading. It appears at the beginning of each test

and it stays on as the operator rotates the test current control clockwise, as necessary for the test current to

be higher than 10 % of the nominal current in the scale. The inappropriate connection of the cables may cause

a difficult circulation of test current. If this message keeps on being displayed, please check that the current

cables are connected appropriately.

OVER RANGE

It indicates that the measured resistance is higher than the maximum value readable in the selected range.

Indicates that the value is the one retained in the memory when pressing the hold key.

BAT

It shows that the battery is discharged. Recharge the battery.

Indice

Altri manuali Phenix Technologies Strumento di misura

Phenix Technologies

Phenix Technologies MRM-100-V2 Manuale utente

Phenix Technologies

Phenix Technologies KVM100 Manuale utente

Phenix Technologies

Phenix Technologies KVM 100A Manuale utente

Phenix Technologies

Phenix Technologies MRM10E Manuale utente

Phenix Technologies

Phenix Technologies KVM300 Manuale utente

Phenix Technologies

Phenix Technologies MRM-100 Manuale utente

Phenix Technologies

Phenix Technologies 400P Manuale utente

Phenix Technologies

Phenix Technologies KVM50A Manuale utente

Manuali Strumento di misura popolari di altre marche

Suaoki

Suaoki D40 Manuale utente

Elster

Elster BK-G1.6 Manuale utente

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuale

Duratool

Duratool D03128 Manuale utente

Vega

Vega VEGAPULS 65 Manuale utente

Tonghui

Tonghui TH2618B Manuale utente

Tenmars

Tenmars TM-801 Manuale utente

MSR

MSR 145 Manuale utente

TPS

TPS WP-82 Manuale utente

ELMETRON

ELMETRON CP-511 Manuale utente

PCB Piezotronics

PCB Piezotronics 003C30 Manuale utente

Tenma

Tenma 72-10465 Manuale utente

Endress+Hauser

Endress+Hauser Proline Promag 50 Specifiche tecniche

Siemens

Siemens SITRANS F Coriolis FCT030 Manuale elenco delle parti

KLINGER

KLINGER CMF V Series Manuale utente

EXFO

EXFO FTB-2 Manuale operativo e di manutenzione

Keysight

Keysight M8290A Manuale utente

ADTEK

ADTEK MW-5 Manuale utente