MX 670 - Multimeter METRIX - Free user manual and instructions

USER MANUAL MX 670 METRIX

1.2% ± 5 cts 1000 A 100.0 to 999.9 A 0.1 A 2.5%

5 cts 1400 A 1000 to 1400 A 1 A 2.5% ± 5 cts Indication de surcharge: 1400 ADC

Thank you for purchasing this MX670 or MX675 series multimeter clamp. To obtain the best service from your unit: read these operating instructions carefully, comply with the precautions for use. 1 GENERAL INSTRUCTIONS If the device is used in a manner unspecified in these instructions, the protection provided by the device may be compromised.

1.1 Unpacking – Packing

All instruments are checked mechanically and electronically before shipment. All precautions are taken to be sure you receive an undamaged instrument. If there is damage, notify the carrier immediately.

1.2 Precautions and safety in measurements

1.2.1 Before any use

The MX670 & MX675 are dual display multimeter clamps. These multimeter clamps are compliant with electrical standard IEC 61010 concerning measuring instruments. For your own safety and to prevent any damage to your measuring instrument, you must follow the instructions in this manual. ∗ This instrument can be used for measurement on category IV electrical installations, in a degree 2 pollution environment, indoors at an altitude lower than 2000 m and with a voltage in relation to ground lower than or equal to 600 V.

• Definition of installation categories (see IEC 61010-1): CAT I: Circuits not directly connected to network and specially protected. Example : protected electronic circuits CAT II: Circuits connected directly to low-voltage installation Example : power supply for domestic electrical appliances and portable tools CAT III: Power supply circuits in the building installation Example : Electrical panel, circuit breakers, fixed industrial machines or devices CAT IV: Source circuits of building low-voltage installation. Example : Power feeders, counters and protection systems

For safety reasons, you must use only measuring leads, of voltage and category at least equal to those of the instrument and compliant with standard IEC 61010. Before use, always check the integrity of the instrument casing and cable insulation.22 MX670 / MX675

1.2.2 Meaning of symbols used

Symbol Meaning Symbol Meaning

Instrument protected by double isolation.

Ground. Alternating current. Battery.

Direct current. The CE marking guarantees conformity with European directives and with regulations covering EMC.

CAUTION - DANGER! Refer to the operating manual.

Selective sorting of waste for recycling electrical and electronic equipment within the European Union. In accordance with the WEEE 2002/96/EC directive: This equipment must not be processed as household waste.

Caution, risk of electrical shock

Audible continuity test Clamp: Application or withdrawal authorized on conductors under dangerous voltage

To prevent electrical discharge, injury or damage to the device, and to ensure you use the multimeter without risk, follow the safety recommendations below:

• Read the operating instructions fully before using this device and observe all safety instructions.

• This device must be used indoors, up to 2000 m altitude.

• Never exceed the protection limit values indicated in the specifications for each type of measurement.

• When the multimeter clamp is inserted into the measurement circuits, do not touch the unused measurement cables or terminals.

• Before changing the function, disconnect the measurement leads from the circuit measured.

• Never measure resistances on a live circuit. Disconnect the power and discharge all high voltage condensers before performing a resistance or continuity measurement.

• Avoid working alone.

• Use the device only as specified in this manual; otherwise, the protection provided by this multimeter may be altered.

• Do not use this device if it appears damaged.

• Inspect the integrity of lead insulation. Replace damaged leads.

• Be careful when working with voltages higher than 70 V DC or 33 Vrms and 46.7 Vpp, such voltages can pose a risk of electrocution. Depending on conditions, the use of individual protection is recommended.

• Always keep hands behind the physical protection of the tips or the clamp during a measurement.MX670 / MX675 23

• Always use the type of battery specified.

• Before opening the instrument, disconnect it from the measurement circuits, switch off and make sure you are not charged with static electricity, which would irreversibly damage the internal components of the instrument.

2.1 Description of the front panel

Resistance measurement

Frequency measurement

3.1 Correction of zero in DC measurement

This function is present only on model MX675 to return to zero the display of the remanent magnetization of the clamp in DC measurement. When the switch is positioned on ADC and with no conductor inserted into the clamp, press the A DC ZERO & HOLD key (about 2 seconds) until display a of zero current appears. This reset to zero is also indicated by an audio beep and the display of the symbol ZERO. This operation must usually be renewed after each high amplitude current measurement.

Elimination of zero correction is possible only by changing the function using the switch.

3.2 HOLD function - Freeze display

In model MX670, it is possible to freeze the value displayed by pressing the "HOLD" button. To deactivate this function, press the "HOLD" button a second time. In model MX675, it is possible to freeze the value displayed by pressing the “A ZERO & HOLD” button. To deactivate this function, press the “A ZERO & HOLD” button a second time.

3.3 Automatic ranges

Depending on the function and nature of the input signals, the instrument uses automatically the best suited measurement range. The manual choice of a range is therefore not possible.

The clamp will stop automatically after 10 minutes (The symbol is displayed). To deactivate this function, hold down the A ZERO & HOLD button (for MX675) or the HOLD button (for MX670). Activate the clamp while turning the switch from the “OFF” position towards any position.

Release the button when the audio signal confirms the operation (the symbol is no longer displayed).

3.5 PEAK Function (1 ms)

This function is used for measuring 1-ms peak values in voltage or current. To activate the function, press the MIN MAX PEAK key for at least 2 seconds, until "PEAK" is displayed. To exit this function, press the MIN MAX PEAK key for at least 2 seconds or press the A ZERO & HOLD button (MX675) twice or press the HOLD (MX670) button twice; the clamp returns to normal mode.26 MX670 / MX675

To activate the MAX MIN function, press on the MIN MAX PEAK button. The MIN value is then displayed. (the MIN symbol is displayed steady; the MAX symbol is displayed flashing) By pressing again on the key, the MAX value will be displayed (the MIN symbol is displayed flashing; the MAX symbol is displayed and steady). By pressing the key again, the clamp returns to normal mode.

3.7 BACKLIGHT Function

By pressing the button, the backlight of the display goes on, press again, it goes off. The "auto power off" function activates after 3 minutes.

3.8 DISPLAY Function

When measuring voltage or AC current, pressing the DISPLAY key replaces the nature of the secondary display by the signal frequency of the main display. Pressing again returns to the previous display. In temperature measurement, pressing the DISPLAY key switches the displays in degrees Celsius and degrees Fahrenheit of the measured temperature. 4 OPERATION

4.1 AC voltage measurement

• Position the switch on V . Connect the red test lead to the "+" terminal and the black test lead to the "COM" terminal. Put the touch prods in contact with the measurement points under AC voltage. Read the result of the measurement on the display.MX670 / MX675 27

4.2 DC voltage measurement

Connect the red test lead to the "+" terminal and the black test l ead to the "COM" terminal. Put the touch prods in contact with the measurement points under DC voltage. Read the result of the measurement on the display. There is no secondary current display for model MX670.

4.3 Measuring AC current

Safety reminder Release the trigger. Check that the clamp is properly closed. Read the result of the measurement on the display. : The technology of this instrument allows the application or withdrawal of the clamp on bare conductors under dangerous voltage. Always hold the instrument while never going past the physical safety protection. Open the jaws by pressing the trigger. Position the clamp around the single conductor to be measured. If difficult access makes reading the display impossible, press briefly on the HOLD button (MX670) or on the A ZERO & HOLD button (MX675) to freeze the display and read the result after withdrawal of the clamp. Note: The measurement results are most accurate when the conductor is centred in the middle of the jaws.28 MX670 / MX675

4.4 DC Current measurement (MX675 only)

Set the switch to A .

Once the display is stabilised, press the A ZERO & HOLD button to reset the display to zero. The operating procedure is then identical to that of AC measurement. See previous paragraph. Note: The correct display of current direction is the result of observing the positioning of the

"+" indication on the clamp arm, in relation to the source.

4.5 Resistance measurement and Audio Continuity Test

4.5.1 Resistance measurement:

Connect the red test lead to the "+" terminal and the black test lead to the "COM" terminal. Put the touch prods into contact with the points to be measured. Read the result of the measurement on the display.

Note: Always check that the circuit is disconnected from the power supply before measuring resistance!MX670 / MX675 29

Connect the red test lead to the "+" terminal and the black test lead to the "COM" terminal. Put the touch prods into contact with the circuit to be tested. If the resistance value of circuit R<35 Ω, the buzzer sounds continuously. Note: Always check that the circuit is disconnected from the power supply before measuring continuity!

Set the switch to TEMP.

To measure the temperature, connect the type K thermocouple probe to the input terminals, observing the

polarity. The main display is in degrees Celsius (°C) by default, and the

secondary display to degrees Celsius (°C) by pressing the

4.7 Measurement of voltage frequency

Position the switch on V

and press the DISPLAY key.

Connect the red test lead to the "+" terminal and th e black test lead to the "COM" terminal.

Place the touch prods in contact with the points whose frequency is to be measured.

Read the frequency value on the secondary display. The main display indicates the

value of the measured TRMS voltage.

4.8 Measurement of AC current frequency

Position the switch on A , and press the DISPLAY key.

Open the jaws by pressing the trigger. Position the clamp around the conductor to be measured. Release the trigger. Check that the clamp is properly closed. Read the result of the measurement on the secondary display. The main display indicates the

value of the measured TRMS current.MX670 / MX675 31

The tolerances assigned to the values, or declared limits, constitute only the values guaranteed by the manufacturer. Values without a tolerance are for information only. The symbol is displayed when the input signals exceed the limit values possible in each measurement range. The symbol - is displayed in °C/°F measurement when there is no input signal (open circuit).

Accuracy is to within ± [% of the reading (L) + number of counts (cts)] in the reference conditions indicated in the appendix.

Range Measuring range Resolution Accuracy 1000 V

1400 V 1000 to 1400 V 1 V 1% ± 2 cts Input resistance: 1 MΩ Overload indication: 1400 VDC

5.2.3 DC current (MX675 only)

Range Measuring range Resolution Accuracy 100 A

5 cts 1400 A 1000 to 1400 A 1 A 2.5% ± 5 cts Overload indication: 1400 ADC

100 A 0.00 to 99.99 A 0.01 A 1.5% ± 5 cts (50 -60Hz) 2.0% ± 5 cts (60 -500Hz) 4.5% ± 5 cts (500Hz – 3kHz) 1000 A 100 to 1000 A 0.1 A Overload indication: 1000 A Rms

5.2.5 Resistance (Ω)

Range Measuring range Resolution Accuracy

Range Measuring range Accuracy Continuity Ohm Function Buzzer < 35

DC (Vmax) Protection: 1,000 Vrms

• For currents Range Measuring range Resolution Accuracy Sensitivity 1,000H

1.0% ± 2 cts 3 A Rms 10,000H

1000 to 9999 Hz 1 Hz

• For voltages Range Measuring range Resolution Accuracy Sensitivity 1,000H

1.0% ± 2 cts 5 Vrms 10,000H

1000 to 9999 Hz 1 Hz

Range Measuring range Resolution Accuracy 1,000°C -40 to +999.5°C 0.5°C 1.0% ± 2°C 1,200°C 1000 to 1,200°C 1 °C

Range Measuring range

APPENDIX Reference Conditions:

Measuring range: 10 to 100 % of the range. Applied AC Signal: - frequency between 48 and 65 Hz - no DC component - sinusoidal, Fc =

Temperature 23°C ± 3°C No external alternative magnetic field No electrical field Conductor centred in jaws (in A)

5.3 Electrical safety (as per NF EN 61010):

Digital display: LCD dual display, 4 digits with max. indication of 9999 points. Polarity: When a negative signal is applied, the sign appears. Low Battery Indicator: is displayed when the voltage supplied by the battery is lower than the operating voltage. The measurements are then guaranteed for only a short period.

Power supply: Battery: 9 V, NEDA 1604, 6F22 alkaline Typical autonomy: 35 hours (MX670) 30 hours (MX675) with alkaline battery, no buzzer or backlight. Protection index of the housing: IP30 according to EN 60529 Maximum jaw opening: MX670: ∅ 42 mm MX675: ∅ 40 mm Dimensions: MX670: 272 x 80 x 43 mm MX675: 257 x 80 x 43 mm Weight: MX670: 480 g (with battery MX675: 440 g (with battery

5.5 Environmental conditions

Operation: 0°C to 40°C, < 70% RH Storage: -10°C to 60°C, < 80% RH

(as per NF EN 61326-1) Compliant with electromagnetic compatibility standard NF EN 61326-1 - Radiated and conducted emission (NF EN 55022) - Radiated Immunity, criterion B (NF EN 61000-4-3) - Conducted Immunity, criterion A (NF EN 61000-4-6) - Electrostatic discharges, criterion A (NF EN 61000-4-2) - Transients, criterion B (NF EN 61000-4-4) - Shock waves, criterion A (NF EN 61000-4-5) Note: Certain high power radioelectric frequencies are, in specific conditions, capable of interfering with the metrological integrity of the multimeter. 6 MAINTENANCE

6.1 Replacing the Battery

appears when the battery is run down and its voltage is becoming insufficient for proper operation. It must then be replaced.

2. Before changing the battery, the clamp must be

disconnected from any external electrical source and must not be holding cables, set the switch to the "OFF" position.

3. Unscrew the 2 screws on the lower casing.

4. Replace the used battery with a new 9V battery, making

sure of the correct positioning of the wires to prevent any pinching at closing.

5. Refit the lower casing and close using the 2 attaching

Keep the gap between the jaws in a state of perfect cleanliness. Set the instrument to the OFF position. Clean the unit with a cloth and a little soapy water. Wipe over with a damp cloth. Never use abrasive products or solvents. Dry carefully before any further use.

If the instrument is not used for a period exceeding 60 days, remove the battery and store it separately.

6.4 Metrological verification

Regular checks must be carried out as for all measurement or test devices. To have your devices checked and calibrated, please contact our COFRAC approved metrology laboratories or MANUMESURE centres. Information and address details available on request: Tel.: [phone] Fax: [phone]

6.5 Repairs under guarantee and outside guarantee

Send your devices to one of the Chauvin-Arnoux Metrix- approved Manumesure regional technical centres. Information and address details available on request: Tel.: [phone] Fax: [phone] Or return the instrument to your distributor for any intervention required during and after the guarantee period. If you ship the instrument, use preferably the original packaging and specify the reasons for the return as clearly as possible in a note included with your instrument. 7 WARRANTY This instrument is guaranteed against any defect in materials or workmanship, in accordance with the general terms and conditions of sale. During the guarantee period (1 year), the instrument must be repaired only by the manufacturer, who reserves the right to repair the instrument or to exchange all or part of it. If the instrument is returned to the manufacturer, the transport costs are the customer's responsibility. The guarantee is not applicable in the following cases:

1. misuse of the instrument or use with incompatible

2. modifications of the instrument without explicit

authorisation of the manufacturer's engineering department;

3. work carried out on the instrument by a person not

approved by the manufacturer;

4. adaptation for a specific application, not included in

the definition of the instrument or the operating instructions

1 set of leads with probe tip (red and black),

1 user manual 5 languages,

1 9V alkaline battery.

1 supple carrying case.