Velleman DVM9912 User manual

DVM9912
AUTORANGING MULTIMETER
MULTIMETER MET AUTOMATISCHE BEREIKINSTELLING
MULTIMÈTRE AVEC INSTAURATION DE GAMME AUTOMATIQUE
MULTÍMETRO CON AJUSTE AUTOMÁTICO DEL RANGO
DIGITALMULTIMETER MIT AUTOMATISCHER BEREICHSWAHL
USER MANUAL
GEBRUIKERSHANDLEIDING
NOTICE D’EMPLOI
MANUAL DEL USUARIO
BEDIENUNGSHANDLEITUNG

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DVM9912 – AUTORANGING MULTIMETER
1. Introduction
To all residents of the European Union
Important environmental information about this product
This symbol on the device or the package indicates that disposal of the device after its lifecycle
could harm the environment.
Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a
specialised company for recycling.
This device should be returned to your distributor or to a local recycling service.
Respect the local environmental rules.
If in doubt, contact your local waste disposal authorities.
Thank you for buying the DVM9912! Please read the manual thoroughly before bringing this device into service. If
the device was damaged in transit, don't install or use it and contact your dealer.
2. Safety information
The following safety information must be observed in order to ensure maximum personal safety during the use
of this device.
•Do not use the meter if the meter or the test leads look damaged or if you suspect the meter is not
operating properly.
•Never ground yourself when taking electrical measurements. Do not touch exposed metal pipes, outlets,
fixtures, etc., which might be at ground potential. Keep your body isolated from ground by using dry
clothing, rubber shoes, rubber mats or any other approved insulating material.
•Turn off power to the circuit under test before cutting, unsoldering, or breaking the circuit. Even small
amounts of current can be dangerous.
•Use caution when working above 60VDC or 30VAC rms as such voltages pose a shock hazard.
•When using the probes, keep your fingers behind the finger guards on the probes.
•Measuring voltage which exceeds the limits of the multimeter may damage the meter and expose the
operator to electrical shocks. Always respect the meter voltage limits as stated on the front of the meter.
•Never apply voltage or current to the meter that exceeds the specified maximum:
Input Limits
Function Max. Output
VDC or VAC 600VDC, 600VAC
mA DC/AC 400mA DC/AC
A DC/AC 10A DC/AC (30 seconds max every 15 minutes)
Frequency, Resistance, Capacitance, Duty Cycle,
Diode test, Continuity 250V DC/AC
Temperature 250V DC/AC

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3. Safety symbols
This symbol next to another symbol, terminal or operating device indicates that
the operator should pay heed to the instructions in the manual in order to avoid
personal injury or damage to the meter.
This warning symbol indicates a potentially hazardous situation, which, if not
avoided, could result in serious injury or death.
This warning symbol indicates a potentially hazardous situation, which, if not
avoided, could result in damage to the product.
A terminal marked with this symbol should not be connected to a circuit point of
which the voltage exceeds 500 VAC or VDC above ground.
This symbol next to one or more terminals indicated that they may carry
particularly hazardous voltages. For maximum safety, do not use the meter and
the test leads if you see this symbol.
4. Controls and jacks
1. 4000 count LCD-Display with symbols
2. function switch
3. 10A (positive) input jack for 10A DC or AC measurements
4. COM (negative) input jack
5. positive input jack
6. MODE push button
7. RANGE push button
8. DATA HOLD push button
9. RELATIVE push button
5. Symbols and indicators
Continuity
BAT Low Battery
Diode
DATA HOLD Data Hold
AUTO Auto ranging
AC Alternating Current or Voltage
DC Direct Current or Voltage
6. Operation
1. ALWAYS turn the function switch to the OFF position when the meter is not in use. This meter has an auto
OFF function that automatically switches the meter OFF after 15 minutes of inactivity.
2. If “OL” appears on the display during a measurement, the value exceeds the range you have selected.
Change to a higher range.
CAUTION
WARNING
WARNING:
Risk of electrocution. High voltage circuits, both AC and DC, are very dangerou
s and
should be measured with great care.

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NOTE: In some low AC and DC voltage ranges, with the test leads not connected to a device, the display may
show a random, changing reading. This is normal and is caused by the high input sensitivity. The
reading will stabilise and give a proper measurement when connected to a circuit.
MODE BUTTON
To select Diode/Continuity, DC/AC, Hz/%Duty
RANGE BUTTON
When the meter is turned on for the first time, it automatically goes into Autoranging mode. This mode
automatically selects the best range for the measurements and is generally the best mode for most
measurements. For measurements situations that require a manually selected range, perform the following
actions:
1. Press the RANGE button. The “AUTO” indication on the display will disappear.
2. Press the RANGE button to go through the available ranges and you select the range you want.
3. Press and hold the RANGE button for 2 seconds to exit the ManualRanging mode and return to
AutoRanging.
DATA HOLD BUTTON
The data hold function allows the meter to “freeze” a measurement for later reference.
1. Press the DATA HOLD button to freeze the reading on the display. The indicator “HOLD” will appear on the
display.
2. Press DATA HOLD again to return to normal operation.
RELATIVE BUTTON
The relative measurement feature allows you to make measurements relative to a stored reference value. A
reference voltage, current, etc. can be stored and measurements made in comparison to that value. The
displayed value is the difference between the reference value and the measured value.
1. Perform any measurement as described in the operating instructions.
2. Press the RELATIVE button to store the reading in the display and the “REL” indicator will appear on the
display.
3. The display will now indicate the difference between the stored value and the measured value.
4. Press the RELATIVE button to return to normal operation.
7. Measurements
DC VOLTAGE MEASUREMENTS
CAUTION:
Do
not measure DC voltages if a motor on the circuit is being switched ON or OFF. Large
voltage surges may occur that can damage the meter.

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1. Set the function switch to the V position (“mV” will appear on the display). The device will automatically
select DC.
2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead banana plug into
the positive (V) jack.
3. Touch the test probe tips to the circuit under test. Be sure to observe the correct polarity (red lead to
positive, black lead to negative).
4. Read the voltage on the display. The display will indicate the proper decimal point and value. If the polarity
is reversed, the display will show (-) minus before the value.
AC VOLTAGE MEASUREMENTS
1. Set the function switch to the V position. Press MODE to select AC voltage.
2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead banana plug into
the positive (V) jack.
3. Touch the test probe tips to the circuit under test.
4. Read the voltage in the display. The display will indicate the proper decimal point, value and symbol (AC,
V, etc.).
DC CURRENT MEASUREMENTS
1. Insert the black test lead banana plug into the negative (COM) jack.
2. For current measurements up to 4000µA DC, set the function switch to the µA position and insert the red
test lead banana plug into the (µA) jack.
3. For current measurements up to 400mA DC, set the function switch to the mA range and insert the red test
lead banana plug into the (mA) jack.
4. For current measurements up to 10A DC, set the function switch to the A position and insert the red test
lead banana plug into the 10A jack.
5. Press the MODE button until “DC” appears in the display.
6. Remove the power from the circuit under test, then open up the circuit at the point where you wish to
measure current.
7. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive
side of the circuit.
8. Apply power to the circuit.
9. Read the current on the display. The display will indicate the proper decimal point, value and symbol.
WARNING:
Risk
of
e
lectrocution. The probe tips may not be long enough to contact the live parts inside
some 240V appliance outlets because the contacts are recessed deep in the outlets. As a
result, the reading may show 0V when the outlet actually carries voltage. Make sure the
probe tips are touching the metal contacts inside the outlet before assuming that there is no
voltage is present.
CAUTION:
Do not measure AC voltages if a motor on the circuit is being switched ON or OFF. Large
voltage surges may occur that can damage the meter.
CAUTION:
Do not carry out current measurements on the 10A scale for a period longer than 30
seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads.

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AC CURRENT MEASUREMENTS
1. Insert the black test lead banana plug into the negative (COM) jack.
2. For current measurements up to 4000µAAC, set the function switch to the µA position and insert the red
test lead banana plug into the (µA) jack.
3. For current measurements up to 400mAAC, set the function switch to the mA range and insert the red test
lead banana plug into the (mA) jack.
4. For current measurements up to 10AAC, set the function switch to the A position and insert the red test
lead banana plug into the 10A jack.
5. Press the MODE button until “AC” appears in the display.
6. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure
current.
7. Touch the black test probe tip to the negative side of the circuit. And touch the red test probe tip to the
positive side of the circuit.
8. Apply power to the circuit.
9. Read the current on the display. The display will indicate the proper decimal point, value and symbol.
RESISTANCE MEASUREMENTS
1. Set the function switch to the Ωposition.
2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead banana plug into
the positive Ωjack.
3. Touch the test probe tips across the circuit or part under test. It is best to disconnect one side of the part
under test so the rest of the circuit will not interfere with the resistance reading.
4. Read the resistance on the display. The display will indicate the proper decimal point, value and symbol.
CONTINUITY CHECK
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (-) jack (COM) and the red test lead banana plug into
the positive (+) jack (Ω).
3. Press the MODE button until the symbol appears on the display.
4. Touch the test probe tips to the circuit or wire you wish to check.
If the resistance is less than approximately 30 Ω, the audible signal will sound. The display will also show
the actual resistance.
WARNING:
To avoid electric shock, do not measure AC current on any circuit with a voltage exceeding
250V AC.
CAUTION:
Do
not carry out current measurements on the 10A scale fo
r a period longer than 30
seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads.
WARNING:
To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any resistance measurements. Remove the batteries and unplug
the line cords.
WARNING:
To
avoid electric shock, never measure continuity on circuits or wires that have voltage on
them
.

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DIODE CHECK
1. Set the function switch to the position.
2. The symbol will appear on the screen.
3. Insert the black test lead banana plug into the negative (-) jack (COM) and the red test lead banana plug
into the positive (+) jack (Ω).
4. Touch the test probe tips to the diode or semiconductor junction you wish to test. Write down the meter
reading.
5. Reverse the probe polarity by switching probe position. Write down this reading.
6. The diode or junction can be evaluated as follows:
A. If one reading shows a value and the other reading shows OL, the diode is good.
B. If both readings show OL, the device is open.
C. If both readings are very low or 0, the device is shorted.
NOTE: The value indicated on the display during the diode check is the forward voltage.
FREQUENCY MEASUREMENT
1. Set the function switch to the Hz% position.
2. Insert the black test lead banana plug into the negative (-) jack (COM) and the red test lead banana plug
into the positive (+) jack (F).
3. Touch the test probe tips to the circuit under test.
4. Read the frequency on the display. The digital reading will indicate the proper decimal point, symbols (Hz,
kHz) and value.
CAPACITANCE MEASUREMENTS
1. Set the function switch to the CAP position (“nF” and a low value will appear in the display).
2. Insert the black test lead banana plug into the negative (-) jack (COM) and the red test lead banana plug
into the positive (+) jack (CAP).
Touch the test leads to the capacitor to be tested. The display will indicate the proper decimal point, value
and symbol.
TEMPERATURE MEASUREMENTS
1. If you wish to measure temperature in
o
F, set the function switch to the
o
F range. If you wish to measure
temperature in
o
C, set the function switch to the
o
C range.
2. Insert the type K thermocouple probe black test lead banana plug into the negative COM jack and the red
test lead banana plug into the positive TEMP jack.
3. Touch the temperature probe head to the part of which you wish to measure the temperature. Keep
touching the part under test until the reading stabilises (about 30 seconds).
Read the temperature on the display. The digital reading will indicate the proper decimal point and value.
WARNING:
To avoid electric shock, do not test any diode that has voltage on it
.
WARNING:
To avoid
electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any capacitance measurements. Remove the batteries and unplug
the line cords.
WARNING:
To
avoid electric shock, disconnect both test probes from any source
of voltage before
carrying out a temperature measurement
.

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BATTERY REPLACEMENT
1. When the batteries are exhausted or drop below the operating voltage, “BAT” will appear in the right-hand
side of the LCD display. The battery should be replaced.
2. Follow instructions for installing a battery. See the battery installation section of this manual.
3. Dispose of the old battery properly.
BATTERY INSTALLATION
1. Disconnect the test leads from the meter.
2. Open the battery door by loosening the screw using a Phillips head screwdriver.
3. Insert the battery into battery holder, observing the correct polarity.
4. Put the battery door back in place. Secure with the two screws.
NOTE: If your meter does not work properly, check the fuses and battery to make sure that they are still in
good operating condition and that they are properly inserted.
REPLACING THE FUSES
1. Disconnect the test leads from the meter and any item under test.
2. Open the fuse door by loosening the screw on the door using a Phillips head screwdriver.
3. Remove the old fuse from its holder by gently pulling it out.
4. Install the new fuse into the holder.
5. Always use a fuse of the proper size and value (0.5A/250V fast blow for the 400mA range, 10A/250V fast
blow for the 10A range).
Put the fuse door back in place. Insert the screw and tighten it securely.
WARNING: To avoid electric shock, do not operate your meter until the fuse door is in place and fastened
securely.
WARNING
: To avoid electric shock, disconnect the test leads from any source of voltage before
removing the battery door
.
WARNING:
To avoid electric shock, do not operate your meter until the batte
ry door is in place and
fastened securely
.
WARNING
: To avoid electric shock, disconnect the test leads from any source of voltage before
removing the battery door.
WARNING:
To avoid electric shock, do not operate your meter until the battery door is in p
lace and
fastened securely
.
WARNING
: To avoid electric shock, disconnect the test leads from any source of voltage before
removing the fuse door
.

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8. Specifications
Compliance EN61010-1
Insulation class 2, double insulation
Overvoltage capacity CATIII 600V
Display 4000 counts LCD with function indication
Polarity automatic, (-) negative polarity indication
Overrange "OL" mark indication
Low Battery indication "BAT" is displayed when the battery voltage drops below the
operating level
Measurement rate 2 times per second, nominal
Auto power off meter automatically shuts down after approx. 15 minutes of
inactivity
Operating environment 0°C to 50°C (32°F to 122°F) at < 70% relative humidity
Storage temperature -20°C to 60°C (-4°F to 140°F) at < 80% relative humidity
Use inside use, max. height 2000m
Pollution degree 2
Power 1 x 9V battery, NEDA 1604, IEC 6F22
Dimensions 150 (H) x 70 (W) x 48 (D) mm
Weight approx. 255g
Accuracy is given at 18°C to 28°C (65°F to 83°F), less than 70% RH
DC Voltage (Autoranging)
Range Resolution Accuracy
400.0mV 0.1mV +0.5% of rdg + 2 dgts
4.000V 1mV
40.00V 10mV
400.0V 100mV
+1.2% of rdg + 2 dgts
600V 1V +1.5% of rdg + 2 dgts
Input Impedance: 7.8MΩ
Maximum Input: 600VDC or 600VAC rms.
AC Voltage (Autoranging except 400mV)
Range Resolution Accuracy
400.0mV 0.1mV +1.5%of rdg + 15 dgts
4.000V 1mV +1.2% of rdg + 3 dgts
40.00V 10mV
400.0V 100mV
+1.5% of rdg + 3 dgts
600V 1V +2.0% of rdg + 4 dgts
Input Impedance: 7.8MΩ
Frequency Range: 50 to 400Hz
Maximum Input: 600V DC or 600V ac rms.