MX 406B - Measuring equipment METRIX - Free user manual and instructions

Product Type	Portable Analog Megohmmeter
Brand	Metrix
Model	MX 406B
Category	Electrical Measurement Equipment
Dimensions (L × W × H)	155 × 98 × 40 mm
Weight	410 g
Power Supply	3 x 1.5 V LR03 alkaline batteries (supplied); typical battery life 850 measurements of 5 s (1000 measurements with DURACELL MN2400 ULTRA batteries)
Display	Analog needle display, dial with logarithmic scales (blue for insulation, green for continuity, red for voltage)
Main Functions	AC+DC TRMS voltage measurement (0-440 V), insulation test at 50 V / 250 V / 500 V (up to 200 MΩ), continuity test (up to 10 Ω with buzzer < 2 Ω), battery test
Safety	CAT III 300 V with respect to earth, pollution degree 2, compliant with NF EN 61010-1 + A2; input protection up to 600 VAC for insulation, 440 VAC for continuity and voltage
Electromagnetic Compatibility	According to NF EN 61326-1; max. influence in radio field at 3 V/m: 3 × accuracy class
Operating Temperature	0 °C to 45 °C (reference 18 °C to 28 °C)
Relative Humidity	80 % up to 31 °C
Maximum Altitude	2000 m
Enclosure Protection Rating	IP 40
Supplied Accessories	1 remote control probe, 1 black angled safety lead, 1 black crocodile clip, 3 LR03 batteries, 1 operating manual in 5 languages
Maintenance and Cleaning	Clean with a damp cloth and soap; do not use abrasive products or solvents
Warranty	12 months from the date of availability
Repairability	Repair under warranty or out of warranty at MANUMESURE regional agencies; outside mainland France, return to the distributor
Spare Parts / Optional Accessories	Carrying case AE0226, set of test probes HA2045, remote control probe HA1340, elastic strap AF009701S, set of leads AG1049, set of crocodile clips HA2050

Frequently Asked Questions - MX 406B METRIX

How to check the battery status of the MX 406B?

Set the switch to the TEST position and press the push button on the probe. If the needle falls within the green area, the batteries are charged; in the red area, they are discharged and must be replaced.

What is the procedure for replacing the batteries?

Disconnect all measurement leads, set the switch to OFF, remove the leads, unscrew the 4 screws on the back, remove the lower housing, replace the batteries respecting polarity, then close the device.

How to perform an insulation measurement at 500 V?

Ensure the circuit is de-energized (mains indicator off). Connect the leads, set the switch to the 200 MΩ 500 V position, then press the push button on the probe to start the measurement. Read the value on the blue scale.

What does the voltage presence indicator on the dial mean?

The light turns on as soon as the leads are connected to an AC voltage higher than 100 V, regardless of the switch position. It indicates the presence of a dangerous voltage, such as mains.

Can DC voltage be measured with this device?

Yes, the MX 406B measures AC and DC voltages (AC+DC TRMS) from 0 to 440 V on the V position. The push button on the probe is not used in this function.

How to test the continuity of a circuit?

Set the switch to the 10 Ω position. Connect the leads to the de-energized circuit. The measurement is performed automatically. If the resistance is less than or equal to 2 Ω, a buzzer sounds.

What safety precautions should be observed before a measurement?

Check that the instrument is suitable for the installation category (max CAT III 300 V). Only use leads compliant with standard NF EN 61010-2-031. Never touch the probe tip when the button is pressed on a high voltage range.

What to do in case of a fault or abnormal stress?

Immediately put the device out of service and prevent any use until verified by qualified personnel. For any repairs, contact an authorized MANUMESURE center.

How to clean the device?

Use a damp cloth and mild soap. Never use abrasive products or solvents that could damage the housing or internal parts.

What is the typical battery life?

With LR03 alkaline batteries, the typical battery life is about 850 measurements of 5 seconds. With DURACELL MN2400 ULTRA batteries, it reaches about 1000 measurements. The battery test consumes the equivalent of one measurement.

USER MANUAL MX 406B METRIX

User's manual ENGLISH Chapter

Bedienungsanleitung

DEUTSCH

Kapite

1 Tripod connector input terminals	8 VAC + DC scale
2 Common input terminal	9 200 MΩ - 500 V and 250 V insulation meas.
3 Voltage present indicator	10 20 MΩ - 50 V insulation measurement
4 200 MΩ - 500 V scale	11 10 Ω - continuity measurement
5 200 MΩ - 250 V scale	12 AC + DC voltage measurement
6 20 MΩ - 50 V scale	13 Instrument battery test
7 10 Ω scale	14 Power off

BESCHREIBUNG

1.1. Precautions and safety measures 8

1.1.1.Before use 8
1.1.2.During use 9
1.1.3. Symbols 9
1.1.4. Instructions 9

1.2.Safety devices.. 9
1.3.Guarantee 9
1.4.Metrological verification.. 9

2. INSTRUMENT DESCRIPTION 10

2.1. Power supply. 10
2.1.1. Self-checking of batteries : TEST 10
2.1.2. Replacing the batteries 11
2.2. Input terminals 11
2.3. Scale 11

3. FUNCTIONAL DESCRIPTION 11

3.1. AC + DC voltage measurement 11
3.2.Continuity test 12
3.3. Insulation measurement at 50V 250 V or 500 V .12

4. GENERAL CHARACTERISTICS 13

4.1. Characteristics 13
4.2.To order 13

1. GENERAL INSTRUCTIONS

You have just purchased a megohmmeter and we thank you for your confidence in us.

This instrument complies with IEC safety standard 61010-1 + A2, dealing with electronic measurements. If you want to obtain the best service, please read these instructions carefully and respect usage precautions.

1.1. Precautions and safety measures

1.1.1.Before use

• This instrument was designed for use indoors in an environment with a degree of pollution 2, altitude >2000m , temperature between 0^ and 45^ , and relative humidity 80% up to 31^ .
• It can be used in category III installations, for voltages never exceeding 300V with respect to the earth.
  Definition of installation categories according to IEC standard 664 :

CATI: CAT I circuits are protected by devices limiting transient overvoltages to a low level. Example protected electronic circuits
CAT II: CAT II circuits are power supply circuits for domestic or similar appliances that may include transient overvoltages of average value. Example: power supply for household appliances and portable tools
CAT III: CAT III circuits are for the power supply of high power appliances that may draw large transient overvoltages. Example: power supply of industrial machines or appliances
CAT IV: CAT IV circuits may have very high transient overvoltages. Example: energy arrival

• The user should respect normal safety rules when he uses the megohmmeter, in order to:

protect himself against dangers due to electrical current, protect the megohmmeter against any false maneuvers.
- The cables and connection accessories used must satisfy IEC standard 1010-2-031 + A2 and must be designed for a rated voltage and overvoltage category at least equal to the values for the circuits on which the measurements are made.

This instrument outputs a DC voltage of 500 V on the 20C MΩ rating. Never touch the probe tip when the probe is activated.

1.1.2. During use

• Never exceed the limiting protection values given in the specifications specific to each measurement type.

1.1.3. Symbols

Refer to the user's manual. Incorrect use may result in damage to the device or its components.

Risk of electric shock

Earth

1.1.4. Instructions

• Any adjustment, maintenance or repair to the megohmmeter when live must be done by qualified personnel after reading the instructions in this manual.
• A qualified person is anyone familiar with the installation, construction, usage and the dangers involved. This person is authorized to switch the installation and equipment on or off in accordance with safety rules.
• Before opening the device, always disconnect it from all measurement circuits and make sure that there is no static electricity charge which could damage internal elements.
• When the instrument is open, some internal capacitors may maintain a dangerous potential even after the instrument is switched off.
  If there are any abnormal faults or constraints, take the instrument out of service and prevent it from being used until it has been verified.

1.2. Safety devices

• The switch has two stops that prevent it from rotating. There are four safety bushes at the top of the instrument.
  It is impossible to access the battery box without firstly disconnecting measurement cables.

1.3. Guarantee

Unless specifically mentioned otherwise, the guarantee is applicable for 12 months after the equipment has been handed over (extract from our general conditions of sale available on request).

1.4. Metrological verification

A periodic verification is necessary, as for all measurement or test instruments.

For checking and calibrating your instrument, please contact our accredited laboratories, the manufacturer subsidiary or agent in your country.

1.5. Repair

Return your instrument to your distributor for any work to be done within or outside the guarantee.

1.6. Maintenance

Clean the instrument with a damp cloth and soap. Never use abrasive products or solvents.

2. INSTRUMENT DESCRIPTION

This megohmmeter is designed to provide you with a strong guarantee of safety, maximum protection and unequalled performance.

It is a portable, professional, standalone measurement instrument for use by electricians, in order to measure the following magnitudes :

• AC -DC voltages (TRMS) from 0 to 440V
  resistances (200 MΩ at 500 V dc)
  resistances (200 MΩ at 250 V dc)
  resistances (20 MΩ at 50 V dc)
• continuity up to 10 (at 200mA )

These magnitudes can be accessed using a rotary switch.

2.1. Power supply

The megohmeter is powered by three standard 1.5 V batteries (type LR03) providing an endurance of about 850 × 5 s measures. For an endurance of one thousand measures, use the DURACELL MN 2400 ULTRA type.

Keep in mind that the power needed for the battery test (see below) is equal to one measure. It is therefore advised to perform this test only once every 60 measures.

2.1.1. Self-checking of batteries " TEST"

Before carrying out a measurement campaign, it is important to check that the instrument power supply batteries are in good condition.

The ---^EST position of the rotary switch indicates the state of the batteries (it is necessary to press the probe push button).

On the scale, there is an area with two different colours :

• if the needle is positioned in the green area = batteries are charged,
• if the needle is positioned in the red area = batteries are discharged.

2.1.2. Replacing the batteries

Unplug measurement circuit test cables, put the rotary switch to the off position and remove test cables from the instruments.

Proceed as follows to replace the megohmmeter batteries :

1. Remove the four screws from the back of the instrument.
2. Remove the lower box.
3. Replace the batteries, taking care that they are in the right direction.
4. Close the instrument.

2.2. Input terminals

Measurements are made with a specific probe (equipped with a push button) connected to the input terminals through a grey cable and a tripod connector, and with a black cable and a crocodile clip.

2.3. Scale

The measurement readout is of the analog type. The megohmmeter is fitted with a graduated scale and a needle.

The scale is graduated to give a direct reading without any multiplication factor (logarithmic graduation).

• the scale length is 79 mm (circular arc according to IEC standard 51)
  -logarithmic scale for the 200M 500 V range (blue scale)
  -logarithmic scale for the 200M 250 V range (blue scale)
  -logarithmic scale for the 20M 50V range (blue scale)
  -logarithmic scale for the 10 range (green scale)
• 400 VAC + DC linear scale (red scale)
• TE3T scale containing 2 colors (red and green scale).

3. FUNCTIONAL DESCRIPTION

As soon as the cables are connected to an AC voltage exceeding 100V , an indicator (located on the scale) lights up regardless of the switch position. For example, it may thus indicate the presence of mains voltage.

3.1. AC + DC voltage measurement

• Measurement range: 0 to 440VAC + DC on the V2 position

The instrument gives the value in TRMS, the probe push button is ineffective in this function.

Accuracy: ± 2.5% (of full scale)
Protection:440V

3.2. Continuity test

A current is generated through the resistor to be measured. The voltage drop measured at its terminals is used to deduce its value.

Measurements must only be made on parts of installations or instruments that are out of voltage.

The measurement is automatic when pressing the probe push button.

Measurement range: 0 to 10

You will hear a beeper for resistances of 2 or less.

(Accuracy: -0 Ω / +0.5 Ω)

Measurement current: ≥ 200 mA for R ≤ 3
- Input protection : up to 440 Vac by CTP + MOSFET
Voltage at no load: 5 V
Accuracy : class 10 over the entire scale

3.3. Insulation measurement at 50V 250 V or 500 V

High voltage is generated at the terminals of the resistor to be measured. The voltage drop measured at the terminals of a known internal resistor in series with the resistor to be measured is used to deduce the value of the resistor.

Tests should only be carried out on circuits out of voltage (the mains light on the instrument scale must be off after disconnecting the test leads and before pressing the probe push button).

Connect the circuit to be measured to the instrument terminals, before starting the measurement.

Measurement results may be distorted by the impedances of additional circuits connected in parallel or by transient currents.

After a measurement, the high voltage present on the device under test discharges through the leads and the instrument if the switch is set to V2 position.

Measurement range: 200k to 200 MΩ at 250 V and 500 V

10 kΩ to 20 MΩ at 50 V

Measurement current: >1mA for R < 50k at 50V

1mAforR<250kΩat250V

1 mA for R < 500 kΩ at 500 V

Protection of inputs: up to 600 V AC

No load voltages: 60 V dc on the 50 V range

320 V

650V

DC on the 250 V range

DC on the 500 V range

Accuracy: according to EN 61557

4. GENERAL CHARACTERISTICS

4.1. Characteristics

Safety

according to IEC 61010-1 + A1 + A2,

class 2, CAT III 300V with respect to the earth
degree of pollution 2
according to IEC 61557

Electromagnetic compatibility EMC Transmission acc. to EN 61326-1

Immunity acc. to EN 61326-1

Max. Influence in electromagnetic fields at 3V / m (NF EN 61000-4-3): 3 times the class of accuracy

Environment

Reference temperature 18^ to 28^

Usage temperature 0^ to 45^

Influence of temperature 0.1 times the class /°C

Box

self-extinguishing

Degree of protection IP 40

material

Power supply

3 batteries -1.5 V alkaline type (LR03) :

typical endurance 850^*5 s measurements

• DURACELL MN 2400 ULTRA type :

typical endurance 1000 measurements

Reference voltage

1.45 V min. per battery

Mechanical characteristics

Dimensions

155× 98× 40mm

Weight

410g

4.2. To order

Megohmmeter (with carry bag) MX0406B-E

Megohmmeter (without carry bag) MX0406B

delivered with :

1 remote control probe,
1 black straight-elbow safety cable.
1 black crocodile clip,
3 LR 03 1.5 V batteries,
1 user's manual in five languages

Accessories

Set of 2 test leads (red + black) HA2045

Spare parts

Carry bag for "no hands" use of the MX 406B AE0226

Remote control probe. HA1340

Elastic bracelet (for use around the wrist) AF009701S

Set of 2 safety leads (red + black). AG1049

Set of 2 crocodile clip (red + black) HA2050

INHALT