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SEFRAM MW3105 Manual

Digital clamp multimeter
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MW3105
DIGITAL CLAMP MULTIMETER

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Summary of Contents for SEFRAM MW3105

  • Page 1 MW3105 DIGITAL CLAMP MULTIMETER...
  • Page 2 M MW3105 A...
  • Page 3 INTRODUCTION 1.1 - Unpacking and inspection Upon removing your new Digital Clamp Meter from its packing, you should have the following items: 1. Digital Clamp Meter. 2. Test lead set (one black, one red). 3. Carrying case. 4. Instruction manual. 5.
  • Page 4 Symbols in this manual This symbol indicates where cautionary or other information is found in the manual. Battery 1.3 Front panel Refer to figure 1 and the following steps to familiarize yourself with the instrument’s front panel, controls and connectors. 1.
  • Page 5 7. Display, LCD Readout . Indicates function selected, data reading selected (PEAK, HOLD, etc.) over-range, polarity (-), and low battery status. Digit display: 3-3/4 digits with maximum reading 4000 for, with automatic placement of decimal point. 8. HOLD. Press to freeze present reading at display and to display "HOLD" annunciator. Press again to exit. 9.
  • Page 6 Figure 1...

  • Page 7: Specifications

    SPECIFICATIONS 2.1 General specifications Display : 3 ¾ digit LCD with a maximum reading of 3999 Polarity : Automatic polarity indicated. « - » shown, « + » assumed. Measuring Rate : Nominal, 2 mes/sec.; Cap. & Freq., 1 mes/sec. Overrange Indication: OL shown, all digits blank.
  • Page 8 2.2 Environmental conditions Indoor use only Maximum altitude of use: 2000 meters. Operating temperature : 0 °C to 50 °C, <70% relative humidity. Storage temperature : -20 °C to +60 °C, <80% relative humidity with battery removed. Installation category : IEC1010 Cat III 600V. Pollution degree : 2...
  • Page 9 2.3 Electrical Specifications Accuracy is given as ±(% of reading + number of digits) from 18 °C to 28 °C, with relative humidity up to 70%. Temperature coefficient: 0.1 x specified accuracy/°C (t <18 °C or t >28 °C). DC Current - Manual ranging Range Resolution Accuracy...
  • Page 10 DC Voltage (using test leads, auto or manual ranging) Range Resolution Accuracy Input Impedance 400mV 100µV > 1000M 11M ( 0.5% + 1 dgt) 10mV 10M 400V 100mV 10M 1000V 10M Overload protection : 1000V DC or 750 VAC RMS.
  • Page 11 AC Voltage (using test leads, auto or manual ranging) Range Resolution Accuracy Input Impedance Overload protection 50Hz to 500Hz 400mV* 100µV > 1000M // 100pF 1000V DC or 11M // 100pF ( 1.5% + 4 dgt) 10mV 750V AC RMS 10M...
  • Page 12 Resistance (using test leads, auto and manual ranging) Range Resolution Accuracy Open circuit voltage Overload protection ( 1.2% + 4 dgt) 0.4V 400 0.1 ( 1.0% + 2 dgt) 0.4V 4K 1 ( 1.0% + 2 dgt) 0.4V 500V DC or 40K...
  • Page 13 Diode Test (using test leads) Range/Resolution Accuracy Open circuit voltage Test current ( 1.0% + 2 dgt) 4V / 1mV 3.2V about 0.6mA Overload Protection : 500V DC or AC RMS Frequency (using test leads, auto or manual ranging) Range Resolution Accuracy Trigger level...
  • Page 14 Capacitance (using test leads, auto and manual ranging) Range Resolution Accuracy Overload protection ( 1.5% + 40 dgt)* ( 1.5% + 4 dgt)* 40nF 10pF ( 1.5% + 4 dgt) 400nF 100pF 500V DC or ( 1.5% + 4 dgt) 4µF AC RMS ( 1.5% + 4 dgt) for C<20µF...

  • Page 15: Operation

    OPERATION This instrument has been designed and tested in accordance with IEC Publication 1010, Safety Requirements for Electronic Measuring Apparatus and has been supplied in a safe condition. This instruction manual contains some information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in safe condition.
  • Page 16 8. When using the jaws to take a measurement, center a single conductor of a cable in the jaws and perpendicular to the jaws to avoid false readings. When two or more conductors are in the jaws when an AC reading is taken, current flows in each wire tend to cancel each other.
  • Page 17 CAUTION Never switch between ranges while connected to high voltage to avoid personal harm and/or damage to the meter. 6. Disconnect test leads from voltage source then switch meter to OFF to conserve power. 3.3 RESISTANCE / CONTINUITY MEASUREMENTS CAUTION Remove power from circuit under test before making resistance measurements.

  • Page 18: Diode Tests

    6. Resistance measurements: Read resistance at display in , k, or M as shown by annunciator symbol. Continuity measurements: Audible tone sounds when resistance is less than about: 40 ohms. 7. Switch meter to OFF when readings are done to conserve battery power. 3.4 DIODE TESTS CAUTION Remove power from circuit under test before making diode measurements.

  • Page 19: Ac Current Measurements

    3.5 AC CURRENT MEASUREMENTS CAUTION Never try to measure currents where the maximum voltage between any conductor and ground exceeds 500 V to avoid personal harm and/or damage to the meter. 1. Remove test leads from meter. 2. Set function selector to A ~ for AC current measurements and choose range. If range is unknown, start with the highest range, 1000A.

  • Page 20: Frequency Measurements

    4. For maximum accuracy, remove the jaws from around the conductor and press the  ZERO button again the meter, Then repeat the measurement and use the second reading. 3.7 FREQUENCY MEASUREMENTS 1. Set function selector to Hz position. AUTO mode is on, range is automatically selected. 2.

  • Page 21: Capacitance Measurements

    3.8 CAPACITANCE MEASUREMENTS CAUTION 1. Discharge capacitors before connecting to the meter. Capacitors should not be measured "in circuit”. Parallel components will invalidate the measurement. 2. Verify that power is off and that any capacitors are discharged in circuit about to be tested. A capacitor can be safely discharged by connecting a 100 k...

  • Page 22: Manual Ranging

    3.10 MANUAL RANGING The meter normally operates in the autoranging mode, but may be switched to manual ranging by the RANGE button. The first press of the RANGE button switches the meter from autoranging to the manual ranging mode and the annunciator is displayed.
  • Page 23 entering this mode are recorded and stored in memory. MAX or MIN or present values can be reviewed by successive presses of the MAX/MIN button. When MIN and HOLD are displayed, the reading shown is the "lowest" since entering this mode. When MAX and HOLD are displayed, the reading shown is the "highest"...

  • Page 24: Relative Mode

    When measuring AC or DC voltage, frequency and resistance peak values with the meter, test leads are used. The general operation is similar to the description given for measuring current. When measuring AC or DC voltage and frequency, just as when measuring current, the meter is connected to the source being measured before power is applied.

  • Page 25: Maintenance

    MAINTENANCE WARNING Remove test leads before changing batteries. Never operate instrument with battery compartment open. CAUTION Remove discharged batteries immediately to prevent damage from battery leakage. BATTERY REPLACEMENT The low battery symbol on the display indicates that battery power under load has dropped to about 7.4 V. The meter may still be used for a short time afterwards;...
  • Page 26 DECLARATION OF CE CONFORMITY according to EEC directives and NF EN 45014 norm SEFRAM INSTRUMENTS & SYSTEMES 32, rue Edouard MARTEL 42100 SAINT-ETIENNE ( FRANCE) Declares, that the below mentioned product complies with : The European low voltage directive 73/23/EEC : NF EN 61010-1 Safety requirements for electrical equipment for measurement, control and laboratory use.
  • Page 28 SEFRAM 32, rue Edouard Martel BP 55 42009 – SAINT-ETIENNE Cedex 2 France Tel : 0825 56 50 50 (0,15€TTC/mn) or +33 4 77 59 36 81 Fax : +33 4 77 57 23 23 Web : www.sefram.fr E-mail :...

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