MX 355 - Multimeter METRIX - Free user manual and instructions

USER MANUAL MX 355 METRIX

1.1. Precautions and safety measures . 17

1.1.1. Symbols .......................................... 17

1.1.2. Definitions of the measurement cat.17

Thank you for purchasing a MX 350/MX 355. For best results from your current clamp: - read this user manual carefully, - comply with the precautions for use. Precautions and safety measures This device is compliant with safety standard IEC 61010- 2-032, the leads are compliant with IEC 61010-031 for voltages up to 600 V in category III. Failure to observe the safety instructions may result in electric shock, fire, explosion, or destruction of the instrument and of the installations.

WARNING, DANGER! The operator should refer to this user’s manual whenever this danger symbol appears.

Equipment protected throughout by double or reinforced insulation.

Application or withdrawal authorized on bare conductors carrying dangerous voltages. Type A current sensor as per IEC 61010-2-

The rubbish bin with a line thr ough it indicates that, in the European Union, the product must undergo selective disposal in compliance with Directive WEEE 2002/96/EC. This equipment must not be treated as household waste

The CE marking indicates conformity with European directives, in particular LVD and EMC.

Alternating current.

1.1.2. Definitions of the measurement

categories Measurement category IV corresponds to measurements taken at the source of low-voltage installations. Example: power feeders, meters and protection devices. Measurement category III corresponds to measurements on building installations. Example: distribution panel, circuit-breakers, machines or fixed industrial devices. Measurement category II corresponds to measurements taken on circuits directly connected to low-voltage installations. Example: power supply to domestic electrical appliances and portable tools.

2. INSTRUMENT OVERVIEW

Delivery condition Check completeness of the delivery against your order. - Multilingual user manual on paper - 1 set of measurement leads (one black and one red) - 2 1.5V AAA or LR3 batteries - 1 carrying bag - 1 test certificate Functions The MX 350 and MX 355 are clamp-on multimeters measuring electrical and physical quantities and grouping the following functions:

DC voltage measurement

Measuring AC current

Measuring DC current

Measuring resistance

Continuity test with buzzer

Measurement of the voltage frequency

Measurement of the current frequency

HOLD function. The value is frozen.

Precautions for use The operator and/or the responsible authority must carefully read and clearly understand the various precautions to be taken in use. If you use this instrument other than as specified, the protection it provides may be compromised, thereby endangering you. Do not use the instrument if it seems to be damaged, incomplete, or poorly closed. Before each use, check the condition of the insulation on the leads, housing, and accessories. Any item of which the insulation is deteriorated (even partially) must be set aside for repair or scrapping. The safety of any system in which this device is incorporated is the responsibility of the system integrator. Before using your device, check that it is perfectly dry. If it is wet, it must be thoroughly dried before being connected or being operated in any way. Use only the leads and accessories supplied. Using leads (or accessories) of a lower voltage or category reduces the voltage or category of the combined instrument + leads (or accessories) to that of the leads (or accessories). Use personal protection equipment systematically. When handling the leads, test probes, and crocodile clips, keep your fingers behind the physical guard. Comply with the environmental conditions of use. Do not use the clamp above its rated frequency, since this might cause it to overheat dangerously. First use Place the batteries in the device as follows:

1. Use a screwdriver; unscrew all the battery

cover screws on the back of the meter.

2. Place the batteries in the casing, respect

3. Screw back battery cover screws21

Before changing the batteries, set the switch to "OFF", disconnect the measuring leads and remove the clamp from the circuit measured. Start the clamp-on multimeter; make sure that all segments are displayed. Check that on Continuity position, and without any input the meter display OL. Take out both cords and short circuit, the beeper should sound. Turn the rotary switch on V and check a known voltage (for example a battery) and make sure voltage is correct. When all the steps above are correct, you can start to use the meter. Measuring AC voltage

1. Set the switch to

2. Connect the red test lead to the input

terminal and the black test lead to the input terminal.

3. Apply the probe tips on the points where the

AC voltage is to be measured.

4. Read the result on the display unit

In the presence of a hazardous voltage (>30V AC) the signal blinks on the screen. Measuring DC voltage

1. Set the switch to22

2. Connect the red test lead to the input

terminal and the black test lead to the input terminal.

3. Apply the probe tips on the points where the

DC voltage is to be measured.

4. Read the result on the display unit

In the presence of a hazardous voltage (>30V DC) the signal blinks on the screen. Measuring AC current

1. Set the switch to

2. Open the clamp by pressing the trigger.

3. Place the clamp around the conductor to be

measured and release the trigger; check that the clamp is correctly closed.

4. Read the measurement result on the display

unit. For safety reasons, disconnect the measuring leads before performing this operation. The clamp must be positioned around a single conductor in a circuit, with the risk of rendering the measurement incorrect. The best measurement is obtained with the conductor centred in the middle of the jaws. Measuring DC current (only MX 355)

2. Open the clamp by pressing the trigger.

3. Place the clamp around the conductor to be

measured and release the trigger; check that the clamp is correctly closed.

4. Read the measurement result on the display

unit. For safety reasons, disconnect the measuring leads before performing this operation. The clamp must be positioned around a single conductor in a circuit, with the risk of rendering the measurement incorrect. The best measurement is obtained with the conductor centred in the middle of the jaws. Measuring resistance

1. Set the switch to

2. Connect the red test lead to the input

terminal and the black test lead to the input terminal.

3. Apply the probe tips on the points where the

resistance is to be measured.

4. Read the result on the display unit

Continuity test with buzzer

1. Set the switch to

2. Connect the red test lead to the input

terminal and the black test lead to the input terminal.

3. Apply the probe tips on the circuit to be

4. If the resistance is less than 40

, the buzzer sounds continuously. Check of frequency in voltage mode (only MX 350)

1. Set the switch to

2. Connect the red measurement lead to the

input terminal and the black measurement lead to the input terminal.

3. Apply the probe tips on the points at which

the frequency is to be measured.

4. Read the result on the display unit.

Check of frequency in current mode (only MX 350)

1. Set the switch to

2. Place the clamp around the conductor to be

measured and release the trigger; check that the clamp is correctly closed.

3. Read the result on the display unit.

The simultaneous use of the input terminals and of the jaws of the clamp throws off the frequency reading.25 Zero mode/"Delta" function (only MX 355) While the button is pressed, the ∆ symbol is displayed. The last value measured becomes the reference value that will be subtracted from subsequent measurements. Press the button again to exit from the mode. Storage Pressing the button freezes the value displayed. To deactivate this function, press the button again. « Peak » function (only MX 355) The "peak" function is used for measuring 1 ms peak value in voltage or current. A long press (2 seconds) on the button activates the "peak" function. A second long press deactivates the function. Autoshutdown The clamp switches off automatically after 20 minutes if no operation is performed. After Autoshutdown, it can be turned on by switching to any range, or pressing the button. It is possible to deactivate this function by holding down the button before powering up the clamp.

4. TECHNICAL SPECIFICATIONS

Reference conditions Temperature + 23 °C ± 5 °C. Freq. For AC signal 45-65 Hz Pure AC signal Electric field < 40 V/m Magnetic field <1 V/m Specifications An overshoot of the range is indicated by on the display unit and by an audible signal.

Note : The display indicates “ OL “ above 630V (900V in peak mode - ONLY MX 355). Above 630V RMS, a repetitive beep indicates that the voltage being measured is greater than the safety voltage for which the device is guaranteed. The display indicates “OL”.

Note : The display indicates “ OL “ above 420A (600A in peak mode – ONLY MX 355). Above 420A RMS, a repetitive beep indicates that the current being measured is greater than the safety current for which the device is guaranteed. The display indicates “OL”.

4.2.7. Frequency (for current)

Range Resol Accuracy Sensibility 600 Hz

4.2.8. Frequency (for voltage)

Digital display Display LCD 6000 counts TRMS measures Sampling 2 measurements per second Accuracy True RMS value measured up to 1kHz (-3dB), pass band ≤3.5kHz Peak factor ≥1.5 full scale Environmental conditions Operation temperature 0°C à +40°C Storage temperature -10°C à +60°C Relative humidity < 70% RH Power supply Battery 2 x 1.5 V AAA or LR03 Battery life MX 350: about 200 hours MX 355: about 40 hours Mechanical features Dimensions 199 x 75 x 36 mm Jaws opening MX 350 26 mm MX 355 30 mm Weight 243 g (avec piles) Protection rating IP30 Compliance with international standards Safety IEC 61010-1; IEC 61010-2-032

Except for the batteries, the instrument contains no parts that can be replaced by personnel who have not been specially trained and accredited. Any unauthorized repair or replacement of a part by an "equivalent" may gravely impair safety. Cleaning Disconnect the instrument completely and turn the rotary switch to OFF. Use a soft cloth, dampened with soapy water. Rinse with a damp cloth and dry rapidly with a dry cloth or forced air. Do not use alcohol, solvents, or hydrocarbons. Keep the clamp jaws as clean as possible.

Except as otherwise stated, our warranty is valid for 24 months starting from the date on which the equipment was sold. Extract from our General Conditions of Sale provided on request. The warranty does not apply in the following cases: - Inappropriate use of the equipment or use with incompatible equipment; - Modifications made to the equipment without the explicit permission of the manufacturer’s technical staff; - Work done on the device by a person not approved by the manufacturer; - Adaptation to a particular application not anticipated in the definition of the equipment or not indicated in the user’s manual; - Damage caused by shocks, falls, or floods.29 INHALT