MPU690 - Measurement Megger - Free user manual and instructions

Brand	Megger
Model	MPU690
Product Type	Proving Unit for Voltage Testers
Output Voltage Range	50 V to 690 V AC (50 Hz) in five steps
Test Voltage Steps	690 V, 400 V, 230 V, 100 V, 50 V (auto-sequenced)
Power Supply	6 x AA alkaline batteries (LR06)
Battery Life	Approximately 550 tests (varies with tester type)
Operating Temperature	-10 °C to +40 °C
Humidity	Up to 70% RH
Pollution Degree	2 (per EN61010)
Measurement Categories	CAT IV, CAT III, CAT II
Frequency	50 Hz (simulates AC mains)
Automatic Power-On	Yes, activated by inserting probes
Magnetic Back	Yes, for attachment to metal surfaces
Safety Features	Hands must remain behind guards; never connect to wiring
Cleaning	Use a soft, dry cloth only
End of Life Disposal	WEEE directive compliant; do not dispose with general waste
Battery Disposal	Portable batteries; recycle per local regulations
Intended Use	Verification of two-pole and pygmy lamp voltage testers
Compliance	EN61010; manufactured in China
Registration	Megger registered as producer (WEE/DJ2235XR, BPRN01235)
Manual Reference	Part No. MPU690_UG_en_V03
Warranty	Not specified; subject to Megger terms

Frequently Asked Questions - MPU690 Megger

What is the Megger MPU690 used for?

The MPU690 is a proving unit used to safely verify the correct operation of two-pole voltage testers and testers with a pygmy lamp. It generates high voltages to energise the tester and confirm functionality.

How do I activate the MPU690?

Insert the voltage tester's flying lead probe into the right terminal, then the fixed probe into the left terminal. Gently apply and maintain pressure on the left probe to activate the internal power switch.

What voltages does the MPU690 generate?

It automatically ramps through five key test voltages: 690 V, 400 V, 230 V, 100 V, 50 V, then turns off. The sequence simulates AC mains at 50 Hz.

Can I use the MPU690 to test live circuits?

No. The MPU690 is only for verifying voltage testers. Never connect it to installation wiring or use it as a voltage source for other purposes.

How many tests can I expect from a set of batteries?

Approximately 550 tests with standard testers. Using a tester with a pygmy lamp will reduce this number due to higher battery drain.

What type of batteries does the MPU690 require?

It uses 6 x AA / LR06 alkaline batteries. Always replace all batteries at the same time and ensure correct polarity.

How should I clean the MPU690?

Clean the unit with a soft, dry cloth only. Keep it free from moisture, grease, and dust. Do not use any liquids or abrasive materials.

What safety precautions should I take?

Read all safety warnings before use. Keep hands behind the guards of applied voltage detectors. Do not insert objects other than voltage tester probes into the terminals. Only use if undamaged and with battery cover in place.

Who can use the MPU690?

The instrument must only be used by suitably trained and competent persons familiar with high-voltage safety procedures.

How do I dispose of the MPU690 and its batteries?

Follow the WEEE Directive: do not dispose with general waste. In the UK, contact B2B Compliance. Batteries are classified as Portable Batteries; recycle per local regulations. Megger is a registered producer (WEE/DJ2235XR).

USER MANUAL MPU690 Megger

The MPU690 Proving Unit safely generates high voltages to energise 2 pole voltage testers thus allowing verification of their correct operation. The unit will also test voltage testers that use a pygmy lamp.

Features include automatic power on when voltage tester probes are inserted into the output terminals, 50Hz test voltage to simulate AC mains supply and a magnetic back to the case.

Instructions

To activate the MPU690 firstly insert the voltage tester flying lead probe into the right hand terminal followed by the voltage tester fixed probe into the left hand terminal.

Gently apply and maintain pressure to the left hand probe to activate the internal power switch. The test voltage is transmitted to the voltage tester.

The test voltage LEDs will automatically ramp up to 690 volts and then slowly ramp back down 690 V - 400 V - 230 V - 100 V - 50 V - OFF (to re-test slightly lift the left-hand probe and re-apply the pressure).

The advantages of the auto test function are:

1. Individual voltages are applied at five key voltage test points with significant battery savings as power is automatically switched off when the test is completed.
2. Once the voltage tester has been proved to be correctly functioning you may carry out testing circuits.

It is recommended that a voltage tester be verified regularly.

Safety Warnings - Risk of electric shock

Safety Warnings must be read and understood before instrument is used. As this unit generates voltages up to 690 volts caution should be exercised, hands should remain behind guards of applied voltage detectors.

■ Never connect to installation wiring.
■ Only voltage testers should be connected to the proving unit.
■ Never insert wire, nails or screwdrivers into either terminal.
- Do not force objects into the left hand terminal to enable permanent operation.

■ Ensure the unit is free from moisture, grease and dust; clean unit with a soft dry cloth only.

■ Do not use if there is any damage to the MPU690.

■ The battery cover must be in place whilst conducting tests.

Note: This instrument must only be used by suitably trained and competent persons.

Safety Warnings cont.

CATIV Measurement category IV: Equipment connected between the origin of the low-voltage mains supply outside the building and the consumer unit.

CATIII Measurement category III: Equipment connected between the consumer unit and the electrical outlets.

CATII Measurement category II: Equipment connected between the electrical outlets and the user's equipment.

End of life disposal

WEEE Directive

The crossed out wheeled bin symbol on the instrument and on the batteries is a reminder not to dispose of them with general waste at the end of their life.

Megger is registered in the UK as a Producer of Electrical and Electronic equipment. The registration no is; WEE/DJ2235XR.

Users of Megger products in the UK may dispose of them at the end of their useful life by contacting B2B Compliance at www.b2bcompliance.org.uk or by telephone on 01691 676124.

Users of Megger products in other parts of the EU should contact their local Megger company or distributor.

Battery Disposal

Batteries in this product are classified as Portable Batteries under the Batteries Directive. Please contact Megger Ltd for instructions on the safe disposal of these batteries.

For disposal of batteries in other parts of the EU contact your local distributor.

Megger is registered in the UK as a producer of batteries. The registration number is BPRN01235. For Further information see www.megger.com

Specification

Output Voltage: 50 – 690 volts in five steps

Power Supply: 6 x AA / LR06 alkaline batteries

Operating Conditions: -10 to +40°C, 70% RH

EN61010 pollution degree 2

Number of tests: Approximately 550

N.B. A voltage tester that uses a pygmy lamp will reduce the number of tests available due to the drain on the batteries.

Megger Limited

Archcliffe Road,

Dover, CT17 9EN

United Kingdom

Tel [phone]

Email [e-mail]

Web www.megger.com

This instrument is manufactured in China

The company reserves the right to change specification or design without prior notice.

Megger is a registered trademark

Part No. MPU690_UG_en_V03 06/14