TENTECH MD-5075x Manual de usuario

Formato: 137mm x 190mm

P. 37

P. 03

Manual de uso

Megóhmetro digital

Digital insulation tester User guide

TENTECH CORPORATION

7330 NW 66th ST - Miami, FL 33166

Phone: +1 305 938 0389 / Fax: +1 786 401 7165

www.tentech.com

5075x

MD-5075x

5 kV Insulation tester

User guide

GF-2015RA



Safety warnings

•Before to use this instrument the User guide and Safety warnings must be read

and understood.

•Safety procedures and rules for working near high voltage energized systems

must be observed during the use of this equipment. The generated voltages

may be dangerous.

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

•Be careful not to make short-circuit between the terminals while a measurement

is running, because it could be dangerous for the operator.

•Be sure that there are not any voltage difference between the points to which the

equipment will be connected to, neither between them and ground.

•The panel, terminals and connectors of the equipment must stay dry and clean.

This equipment should be used only by a trained and competent

person, strictly applying suitable safety rules.

Used symbols

Caution, risk of electric shock.

Caution, refer to User Guide.

Battery

Printer

Capacitance

Voltmeter

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.

Index

1. Description.........................................................................................................6

2. Panel control functions.......................................................................................7

2.1. Keyboard....................................................................................................8

2.2. Display .....................................................................................................10

3. Charging battery ..............................................................................................11

4. Connecting the MD-5075x ...............................................................................11

5. Use of “Guard” (G) terminal..............................................................................14

6. Setting tests.....................................................................................................15

6.1. Test voltage definition...............................................................................15

6.2. Selection of the operation mode ...............................................................16

6.2.1. Normal mode .....................................................................................16

6.2.2. SVT Mode (step voltage tests) ...........................................................16

6.2.3. “TIMER” Mode....................................................................................18

6.2.4. “Pass / Fail” Test mode......................................................................19

7. How to perform tests........................................................................................20

7.1. Measurement of the Dielectric Absorption Index (DAI)..............................22

7.2. Measurement of the Polarization Index (PI)..............................................23

8. Other functions ................................................................................................24

8.1. Backlight...................................................................................................24

8.2. Filter.........................................................................................................24

8.3. True RMS AC/DC Voltmeter.....................................................................24

8.4. Leakage current measurement.................................................................24

8.5. Capacitance measurement.......................................................................25

8.6. Hold..........................................................................................................25

8.7. Internal memory........................................................................................26

8.8. Battery status check .................................................................................26

8.9. Auto power-off..........................................................................................26

9. Software ..........................................................................................................27

9.1. USB Drivers..............................................................................................27

9.1. T-Logger software ....................................................................................27

10. Printer............................................................................................................28

11. Cleaning ........................................................................................................28

12. Technical specifications.................................................................................29

13. Application note 32 ........................................................................................32

14. Warranty........................................................................................................35

1. Description

The digital insulation tester model MD-5075x is at the cutting edge of

TENTECH’ insulation analyzer equipment and it is one of the more

complete and sophisticated of the international market. It uses an efficient

well experienced technology, which provides safe, reliable and accurate

measurements of insulation resistances up to 5 TΩ, with 4 pre-selected

test voltages: 500 V -1 kV -2.5 kV -5 kV. Other test voltages may be

selected in steps of 25 V, 100 V, or 500 V.

A microprocessor controls the equipment, making the operation easier

and enabling the incorporation of advanced features such as: Auto-range

selection, Memory enabling storing up to 4000 readings, AC/DC

voltmeter, Polarization and Dielectric absorption index automatic

measurement, Measurement of Leakage Current and Capacitance,

“TIMER” to program resistance test time, “Limit” allowing making test type

“Pass / Fail” with programmable limit. Step Voltage Test, Built-in Printer,

Real Time Clock and Calendar for measurement identification. Built-in

chronometer, indicating elapsed time, in minutes and seconds, since the

test started.

The USB interface enables communication of the equipment with a

computer to transmit registered data. The T-Logger software analyzes the

results and shows through charts and tables, automatically generating the

test protocol. The built-in printer records values on paper every each 15

seconds, as a measurement taken document.

Due to its constructive features, this instrument is strong delivering an

excellent performance both with laboratory and field works, under hard

environment conditions.

2. Panel control functions

Voltage output terminal (-V)

Zero reference terminal (+R)

Guard (G) Terminal

Display

Keyboard

High Voltage led

On / Off key

USB communication port

Power supply input

Printer

2.1. Keyboard

Key

Function

LED

Turns the printer on/off

Indicates that the printer

is turned on.

Hold - Freeze the last reading on the display

The Hold function is on

Battery - exhibits the battery charge status

on the display

Indicates that the battery

charger is on

Filter - Activates the filter that minimizes the

interferences of the external noise

Indicates that the filter is

Shows the calculated value on the display as

a result of a Step Voltage Test (SVT),

Polarization Index (PI) and Dielectric

Absorption Index (DAI)

–

Backlight - activates the display light

–

Capacitance - exhibit the capacitance value

–

Activated enables the programming of the

Operation Mode (Normal, SVT or with

TIMER of selectable time)

Indicates that the

selection of the

Operation Mode is

enabled

Activated, enables programming of 25 V

step tests voltages

25 V steps activated

Activated, enables programming of 100 V

step tests voltages

100 V steps activated

Activated, enables programming of 500 V

step tests voltages

500 V steps activated

Selection of 500 V test voltage

Indicates 500 V selected

Selection of 1 kV test voltage

Indicates 1 kV selected

Selection of 2.5 kV test voltage

Indicates 2.5 kV selected

Selection of 5 kV test voltage

Indicates 5 kV selected

These keys (decrease or increase) enable

the selection of the value that is being

programmed.

–

Activates / enables programming of the limit

for the “Pass / Fail” test

Indicates when the

measured resistance is

lower than programmed

limit

Start - Start test

Indicates that the test is

being executed

Stop - End of test

–

2.2. Display

Measurement results in the corresponding measuring unit, elapsed time

since the measurement started, selected test voltage, analogue indication

by means of a bargraph and several messages to the operator are

displayed on alphanumeric LCD.

3. Charging battery

The MD-5075x uses a rechargeable LiFePO4 12 V - 6000 mAh.

At the end of battery useful life, the battery must be recycled or

disposed of properly, in order to protect the environment.

Charging procedure:

•Check if the MD-5075x is turned-off and connect it to the mains (AC

adapter).

•The charging indicator ( ) will turn on red and will

remain that way until the battery is totally charged. Then the light will

remain green and keep in that way until the MD-5075x is disconnected

of the mains.

Alternate green and red

lights

Evaluation of the battery initial status when the

source is connected, during one second.

Steady red light

Battery under charge.

Flashing red light

The battery was not successfully charged. It

denotes some trouble in the battery charging

process.

Steady green light

The charge has successfully finished. The battery

is OK.

The rechargeable battery does not have “memory effect” and there are no

restrictions to start charging it as many times as is needed. However the battery

could be da

maged if remains in deep discharge for a while.

To avoid this effect, charge the battery before left the equipment in storage and

don’t let pass more than 30 days without recharge, even if the instrument wasn’t

used (under storage, the battery loses part of its charge).

IMPORTANT: while the equipment is connected to the mains supply the START

key is inhibited, so you will not be able to make measurements.

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