Velleman DVM810 Bedienungsanleitung
DVM810
DIGITAL MINI MULTIMETER
DIGITALE MINI MULTIMETER
MINI MULTIMETRE NUMERIQUE
DIGITALES MINIMULTIMETER
Instruction Manual
Gebruikershandleiding
Manuel d’utilisation
Gebrauchsanleitung
DVM810 GB
1
1. INTRODUCTION
The DVM810 is a compact multimeter with a 3 1/2 digit LCD for measuring DC and AC
voltages, DC currents, resistance, diodes and transistors (hFE). Full overload protection is
provided. It is an ideal instrument for hobbyists, for use in the field, for laboratories and
workshops and for domestic applications.
2. FRONT PANEL DESCRIPTION
1. FUNCTION AND RANGE SWITCH
This switch is used to select the desired function and range. It also activates the
instrument. Place the switch in the "OFF" position when the instrument is not in use in
order to extend the life of your battery.
2. DISPLAY
3 1/2 digit display with 7 segments. Height : 0.5" (12.7mm)
3. "COMMON" JACK
Plug in the connector for the black (-) test lead.
4. "VP$-$&.
Plug in the connector for the red (+) test lead when you wish to measure voltages,
resistances and currents (with the exception of 10A-measurements).
5. "10A" JACK
Plug in the connector for the red (+) test lead for all your 10A measurements.
6. TRANSISTOR JACK
Plug in the transistor for hFE-measurements of a NPN or PNP transistor. Use the correct
b.e.c.-connections.
3. SPECIFICATIONS
Maximum accuracy is guaranteed for a one-year period after calibration. Ideal
circumstances require a temperature of 23°C (± 5°C) and a max. relative humidity of 75%.
3.1. DC VOLTAGE
Range Resolution Accuracy
200mV 100µV ±0.25% of rdg ± 2 digits
2000mV 1mV
20V 10mV
200V 100mV
500V 1V
±0.5% of rdg ± 2 digits
Overload protection : 220Vrms AC for the 200mV range and 1500V DC or 500Vrms AC for
other ranges.
DVM810 GB
2
3.2. AC VOLTAGE
Range Resolution Accuracy
200V 100mV ±1.2% of rdg ± 1 digit
500V 1V ±1.2% of rdg ± 1 digit
Overload protection : 500V DC or 500V rms for all ranges.
Response : average response, calibration in rms of a sine wave.
Frequency range : 45Hz – 450Hz
3.3. DC CURRENT
Range Resolution Accuracy
200µA 100nA
2000µA 1µA
20mA 10µA ±1.0% of rdg ± 2 digits
200mA 100µA ±1.2% of rdg ± 2 digits
10A 10mA ±2.0% of rdg ± 2 digits
Overload protection : 200mA 250V fuse (10A-range is not fuse-protected)
Measuring voltage drop: 200mV
3.4. RESISTANCE
Range Resolution Accuracy
200100m
20001
20k10
200k100
±0.8% of rdg ± 2 digits
2000k1k±1.0% of rdg ± 2 digits
Max. open circuit voltage: 2.8V
Overload protection : max. 220Vrms for 15 seconds on all ranges
4. OPERATING INSTRUCTIONS
4.1. WARNING
1. Do not measure voltages that exceed the earthing level by more than 500V in order to
avoid all risks of electroshocks or damage to the instrument.
2. Make sure the insulation of all test leads, probes and connectors is intact prior to
activating the device.
4.2. DC VOLTAGE MEASUREMENTS
1. Connect the red test lead to the "VP$MDFNDQGWKHEODFNOHDGWRWKH&20MDFN
2. Place the RANGE switch in the appropriate VDC position. Set the switch to the highest
range and work your way down if the voltage range is unknown beforehand.
3. Connect the test leads to the device or circuit to be measured.
4. Activate the device or circuit to be measured. Both the voltage reading and the polarity
will be displayed.
DVM810 GB
3
4.3. AC VOLTAGE MEASUREMENTS
1. Connect the red test lead to the "VP$MDFNDQGWKHEODFNOHDGWRWKH&20MDFN
2. Place the RANGE switch in the appropriate VAC position. Set the switch to the highest
range and work your way down if the voltage range is unknown beforehand.
3. Connect the test leads to the device or circuit to be measured.
4. Activate the device or circuit to be measured. The voltage value will appear on the
display.
4.4. DC CURRENT MEASUREMENTS
1. Connect the red test lead to the "VP$MDFNDQGWKHEODFNOHDGWRWKH&20MDFN
(Connect the red test lead to the "10A"-jack for measurements between 200mA and
10A).
2. Place the RANGE switch in the appropriate ADC position. Set the switch to the highest
range and work your way down if the voltage range is unknown beforehand.
3. Open the circuit to be measured and connect the test leads IN SERIES with the load of
which the current is to be measured.
4. Activate the device or circuit to be measured. The current value will appear on the
display.
4.5. RESISTANCE MEASUREMENTS
1. Connect the red test lead to the "VP$MDFNDQGWKHEODFNOHDGWRWKH&20MDFN
2. Place the RANGE switch in the appropriate SRVLWLRQ
3. If the resistance to be measured is connected to a circuit : disconnect the power and
discharge all capacitors prior to measurement.
4. Connect the test leads to the circuit to be measured.
5. The resistance value will be displayed.
4.6. DIODE MEASUREMENTS
1. Connect the red test lead to the "VP$MDFNDQGWKHEODFNOHDGWRWKH&20MDFN
2. Set the RANGE switch to the position.
3. Connect the red test lead to the anode and the black test lead to the cathode of the
diode to be measured.
4. The forward voltage drop will be displayed in mV. "1" will be displayed if the polarity of
the diode is reversed.
4.7. TRANSISTOR hFE-MEASUREMENTS
1. Set the RANGE switch to the hFE-position.
2. Determine whether the transistor is NPN or PNP and locate the emitter, base and
collector leads. Insert the leads into the proper holes of the hFE-socket on the front
panel.
3. The display will show the approximate hFE-value at the moment of testing. Base current
10µA, Vce 2.8V.
DVM810 GB
4
5. BATTERY AND FUSE REPLACEMENT
CAUTION
All test leads should be disconnected from energised circuits prior to opening the case.
This eliminates the risk of electroshocks.
- The fuse rarely needs to be replaced and a blown fuse is nearly always due to an error
on behalf of the operator.
- Replace the battery when the display reads "BAT".
- In order to replace the battery (type GP23GA) or the fuse (200mA/250V) : loosen and
remove the 2 screws at the back of the device. Remove the old battery or fuse and
insert a new one. Observe the polarity !
6. ACCESSORIES
- instruction manual
- a set of test leads
- a GP23GA-battery of 12V
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1
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