DVM645BI BENCH MULTIMETER TAFELMULTIMETER MULTIMETRE DE TABLE BANCO MULTÍMETRO TISCHMULTIMETER User Manual Gebruikershandleiding Manuel d'utilisation Gebrauchsanleitung
DVM645BI – BENCH MULTIMETER Introduction This manual contains instructions and warnings that must be observed to ensure safe operation and to keep the meter in a safe condition. WARNING READ "SAFETY INFORMATION" BEFORE USING THE BENCH MULTIMETER This multimeter is a portable 4000-count instrument that is designed for use in the laboratory, the field, at home, and in other environments.
(i.e. broken or damaged test leads, cracked case, display not reading, etc.) do not attempt to do any measurements. 3. Never earth yourself when making electrical measurements. Do not touch exposed metal pipes, outlets, fixtures, etc., which might be at earth potential. Keep your body insulated from earth by using dry clothing, rubber shoes, rubber mats, or any approved insulating material. 4. Never touch exposed wiring, connections, test probe tips, or any live circuit conductors when making measurements.
Chapter 1 A quick tour Explanation of Symbols Attention ! Refer to the operating instructions Dangerous voltage may be present at terminals Ground (Earth Terminal) AC - Alternating Current DC - Direct Current Audible Continuity Equipment protected throughout by Double Insulation (Protection Class II) DVM645BI 3 GB
Instrument Layout Figure 1-1. Bench Multimeter (Front) Figure 1-2.
1. VΩ Hz Volts, Ohms, Diode, and Frequency Input Terminal Ω This is the positive input terminal for all functions except current measurement. The red test lead is connected to this. 2. COM Common Terminal This is the negative (ground) input terminal for all measurement modes. The black test lead is connected to this. 3. mA Milliamp Input Terminal This is the positive input terminal for current measurements (AC or DC) up to 400mA. The red test lead is connected to this. 4.
Using the Rotary Switch Turn the multimeter on by turning the rotary switch to any function. Using the Buttons The buttons are push type switches. The functions are as follows: BACK LIGHT Button 1. button. When powered You can turn the back light on or off by pressing the by the battery, the back light will automatically switch off again after a short period of time. FUNCTION SELECTOR Button 2.
5. Min/Max Recording Hold: MIN/MAX Button button to enter the Min/Max Recording Hold mode. The minimum Press the and maximum values are then reset to the current input, the readings are stored in memory, and the " " indicator turns on. Push the button to cycle through the minimum (MIN), maximum (MAX), and current readings. The "MIN" or "MAX" indicator turns on to indicate what value is being displayed.
8. Data Memory: MEM STO Button button to enter the Data Memory mode and turn on the "MEM" Press the indicator. All the display data is then stored in the memory. The stored data can be read out and displayed on the LCD, which then switches to the Data Recall Hold mode. Data Recall Hold: MEM RCL Button 9. button to enter the Data Recall mode and turn on the "MEM" and Press the " " indicator. The stored data can be read out and displayed on the LCD, which then switches to the Data Recall Hold mode.
Chapter 2 Measurements Introduction WARNING To avoid user injury and multimeter damage, the multimeter must be set to the correct value of mains voltage before connecting the power lead to the mains and switching on. Before doing any measurements always examine the multimeter and accessories for any damage, contamination (excessive dirt, grease, etc.) and defects. Examine the test leads for cracked or frayed insulation and make sure the lead plugs fit snugly into the multimeter sockets.
Measuring DC Volts Circuit Red Figure 2-1. Measuring DC Volts WARNING To avoid possible electric shock, multimeter damage and/or equipment damage, do not attempt to do any voltage measurements if the voltage is above 1000V DC / 750V AC RMS. 1000V DC / 750V AC RMS are the maximum voltages that this multimeter is designed to measure. c Turn the Selector to Volts DC d Connect the leads as shown e is not available in Volts DC, all other buttons can be used. 1.
Measuring AC Volts Circuit Red Figure 2-2. Measuring AC Volts WARNING To avoid possible electric shock, multimeter damage and/or equipment damage, do not attempt to do any voltage measurements if the voltage is above 1000V DC / 750V AC RMS. 1000V DC / 750V AC RMS are the maximum voltages that this multimeter is designed to measure. c Turn the Selector to Volts AC d Connect the leads as shown e is not available in Volts AC, all other buttons can be used. 1.
Measuring DC and AC Amps Circuit Red Figure 2-3. Measuring Amps WARNING Do not attempt to measure high currents. Use a current clamp for measurements >10A. The 10A input terminal is protected by a F15A/250V fast blow ceramic fuse. c Turn the selector to DC and AC Amps. d Connect the leads as shown e is not available in DC and AC Amps, all other buttons can be used. Each press of the button switches alternately between DC and AC Amps. 1.
Measuring DC and AC Milliamps Circuit Red Figure 2-4. Measuring Milliamps WARNING Do not attempt to measure high currents. The mA input terminal is protected by a F1A/250V fast blow ceramic fuse. c Turn the selector to DC and AC Milliamps. d Connect the leads as shown. is not available in DC and AC Milliamps, all other buttons can be used. e Each press of the button switches alternately between DC or AC Milliamps. 1.
Measuring Frequency and Adaptive Measurement Circuit Red Figure 2-5. Measuring Frequency and Adaptive Measurement (ADP) c Turn the selector to frequency and adaptive measurement. d Connect the leads as shown is not available in frequency and adaptive measurement, all other buttons e can be used. Each press the button measurement. switches alternately between frequency and adaptive Hz input terminals 1. Insert the black and red test leads into the COM and VΩ Ω respectively. 2.
Measuring Capacitance Red Figure 2-6. Measuring Capacitance WARNING Turn off the power to the device under test and discharge all capacitors. c Turn the selector to capacitance. d Connect the leads as shown: insert the black and red test leads into the COM Hz input terminals respectively. and VΩ Ω is not available with capacitance, all other buttons can be used. e 1. Turn off the power to the device under test and discharge all capacitors. 2.
Testing Diodes Red Figure 2-7. Diode Test WARNING Measurements must always be done with the circuit power OFF. c Turn the selector to Diode. d Connect the leads as shown: insert the black and red test leads into the COM Hz input terminals respectively. and VΩ Ω and are not available in diode test, all other buttons can be used. e ) position by turning the rotary switch. 1. Select the ( 2. Insert the black and red test leads into the COM and VΩ Ω Hz input terminals respectively. 3.
Measuring Resistance and Continuity Red Figure 2-8. Measuring Resistance and Continuity c Turn the selector to Resistance and Continuity measurement. d Connect the leads as shown. is not available in continuity test, all other buttons can be used. e Each press of the button continuity measurement. switches alternately between resistance and Resistance measurement is as follows: button. 1. Select resistance by pressing the Ω Hz input terminals 2.
6. The resistance of the test leads can diminish accuracy in the lowest (400Ω) range. The error is usually 0.1 to 0.2Ω for a standard pair of test leads. To determine the error, short the test leads together and the use the Relative mode to automatically subtract the lead resistance from the resistance measurement. 7. After all measurements have been completed, disconnect the test leads from the circuit and multimeter input terminals. The Continuity ( ) measurement is as follows: button. 1.
Chapter 4 Specifications General Specifications Maximum voltage between terminals and earth: CAT. II 1000V DC or 750V AC rms (sine) Display: 3 3/4 digit (4000 count) digital indication. Frequency range: 9999 counts max.
Resolution and Accuracy DC Volts (mV DC) Range resolution Accuracy (% reading + digits) 400mV 0.1mV ± (0.3% rdg + 5d) 4V 1mV ± (0.3% rdg + 2d) 40V 10mV ± (0.3% rdg + 2d) 400V 100mV ± (0.3% rdg + 2d) 1000V 1V ± (0.3% rdg + 2d) Input impedance: 10MΩ, < 100pF Overload Protection: 1000V DC or 750V AC RMS AC Volts (true rms, ac-coupled) Range resolution Accuracy (% reading + digits) 4V 1mV ± (0.8% rdg + 5d) 50 to 60Hz 40V 10mV ± (1.
AC Current Range resolution Accuracy (% reading + digits) 4mA 1µA ± (1.5% rdg + 5d) 45 to 400Hz 40mA 10µA ± (1.5% rdg + 5d) 45 to 400Hz 400mA 100µA ± (1.5% rdg + 5d) 45 to 400Hz 10A 10mA ± (2% rdg + 10d) 45 to 400Hz (20A for 30 seconds) Input protection: 1A/250V fuse for mA input, 15A / 250V fuse for A input Load voltage: 600mV max. for mA input, 900mV max. for A input AC coupled true RMS Resistance Range resolution 400Ω 0.1Ω 4kΩ 1Ω 40kΩ 10Ω 400kΩ 100Ω 4MΩ 1kΩ 40MΩ 10kΩ Open circuit Voltage: 0.
Capacitance Range 4nF 40nF 400nF 4µF 40µF resolution 1pF 10pF 100pF 1nF 10nF Accuracy (% reading + digits) ± (2% rdg + 40d) in relative mode ± (2% rdg + 5d) in relative mode ± (2% rdg + 5d) in relative mode ± (0.5% rdg + 5d) ± (2% rdg + 5d) at <= 20µF ± (5% rdg + 5d) at > 20µF Input protection: 250V RMS Frequency Counter Ranges: 100Hz, 1kHz, 10kHz, 100kHz, 1MHz Resolution: 0.01Hz in the 100Hz range Accuracy: ± (0.
Chapter 4 Maintenance Introduction Any repairs or servicing not covered by this manual should only be done by qualified personnel. Battery Replacement WARNING To avoid electric shock, disconnect the power leads from the mains, and disconnect the test leads and any input signals before replacing the battery. Only replace with same type of battery. " indicator, the battery must be replaced to When the multimeter displays the " maintain proper operation. Use the following procedure to replace the battery: 1.
Fuse Replacement WARNING To avoid electric shock, disconnect the test leads and any input signals before replacing the fuses. Replace only with the same type of fuse. The A input terminal is protected by a F 15A/250V fast blow ceramic fuse. The mA input terminal is protected by a F 1A/250V fast blow ceramic fuse. Use the following procedure to examine or replace the multimeter fuses: 1. Turn the power switch to off, and disconnect the power cable from the mains. 2.
Other notes 1. 2. Do not use abrasives or solvents on the bench multimeter, use a damp cloth with mild detergent only. If any faults or abnormalities are observed, the bench instrument should not be used and needs to be inspected.