Velleman DVM1090 User Manual
DVM1090
DIGITAL THERMOMETER
DIGITALE THERMOMETER
THERMOMETRE NUMERIQUE
DIGITALE S THE RM OM E TER
MULTÍMETRO DIGITAL
User Manual
Gebruikershandleiding
Manuel d’utilisation
Gebrauchsanleitung
Manual
DVM1090 – DIGITAL MULTIMETER
1. Introduction & Safety Prescriptions
Thank you for buying the DVM1090. This digital multimeter has a large LCD, a data-hold function and a backlight. It
is ideal for use in open air, workshops and schools and for home and hobby applications.
2. Safety
The meter was designed according to IEC-1010 concerning the safety requirements for electronic measuring
instruments with an overvoltage category (CAT II) and pollution 2.
Respect the following safety instructions to ensure maximum personal safety and to keep the device itself in good
working order :
• Protect yourself against electroshocks.
• Do not use this device for any other application than those described in this manual.
Make sure the device was not damaged in transit.
•
• Make sure the insulation of the test leads is not damaged and/or the wire itself is not exposed.
• Full compliance with safety standards can only be guaranteed if the device is used with the supplied test leads. If
necessary, they should be replaced with identical leads or leads with identical electric ratings. All test leads
should be in good working order.
• Never exceed the specified limit values for the various measurement ranges.
Do not touch unused terminals when the meter is connected to a circuit.
•
• Place the range selector switch in the highest position if the value to be measured is unknown beforehand.
• Do not measure voltages > 1000V above earth ground.
Exercise extreme caution when working with voltages in excess of 60VDC or 30Vrms AC. Keep your fingers
•
behind the probe barriers while using the device.
Do not connect the leads to a voltage source while the function switch is in one of the following modes : current,
•
resistance, capacitance, inductance, temperature, frequency, diode, transistor or continuity.
• Disconnect all test leads from the circuit to be tested prior to selecting a different function or range.
• When performing measurements on TV's or switching power circuits, the user should keep in mind that voltage
surges may occur at test points. These surges may damage the meter.
• Never perform resistance, capacitance, inductance, diode and continuity measurements on live circuits.
Never perform capacitance measurements unless the capacitor in question has been fully discharged.
•
• Have the device checked by a qualified technician in case of malfunction.
• Never use the meter if the back panel is not in place and firmly fixed.
Do not use or store the device in areas exposed to direct sunlight, high temperatures or high humidity.
•
2.1. Symbols
Important information with reference to safety, consult the manual !
Double insulation (Protection class II)
Earth ground
DVM1090 GB 1
Low battery
DC (direct current)
Fuse
buzzer for continuity
AC (alternating current)
AC or DC (alternating current or direct current)
CAD II Overvoltage category II, pollution degree 2 per IEC1010-1
CAT III Overvoltage category III, pollution degree 2 per IEC1010-1
2.2 Maintenance
• Do not remove the back cover while a voltage is being applied. Only a qualified technician should handle repairs.
Always disconnect the test leads from all current sources before opening the meter.
•
• Replace the battery when the
Replace blown fuses with an identical one or a fuse with identical voltage and current ratings : F 200mA/250V
•
symbol is displayed.
(quick-acting, max. resistance 2Ω), F 10A/250V (“quick-acting”).
• Use a damp cloth and a mild detergent to clean the device. Never apply abrasives or solvents to the meter
Place the power switch in the OFF position when the device is not being used
•
• Remove the batteries to keep them from leaking if the device is to be stored for a prolonged period of time.
3. Front Panel Description
1. LCD display
2. L/C button : press this button prior to each individual
capacitance and inductance measurement in order to
calibrate the device.
3. Power button (
4. Range selector : used to select the desired function and
range
5. Front panel
6. Battery cover
7. 10A jack
8. Capacitor and Ω, °C, A, V, Hz and H-jack
9. COM jack
10. DC/AC button (DC/AC) : used for AC/DC voltage and
AC/DC current measurements. Place the button in the
pressed-down position for AC current or voltage
measurements or put it in the depressed position for DC
current and voltage measurements.
11. Backlight button (LIGHT)
12. Data-hold button (HOLD)
)
DVM1090 GB 2
4. Specifications
Max. accuracy is achieved during a one-year period after calibration. Ideal circumstances require a temperature of 18
to 28°C (64 to 82°F) and a max. relative humidity of 75%.
4.1 General Specifications
Measuring Method Dual-slope integration A/D converter
Sampling Time ±0.4sec.
Display LCD 25mm
Max. Display 1999 points (3 ½ digits)
Polarity Indication “-“ indicates negative polarity
Overrange Indication “1”
Displayed Measuring Unit Unit of electrical capacity
Battery-Low Indication “
”-symbol is displayed
Maximum Altitude 7000ft (2000m)
Max. voltage between terminals and earth 1000V DC or AC
Fuse Protection F 200mA/250V (quick-acting, max. resistance 2Ω), F 10A/250V (quick-
acting)
Power Supply 9V-battery (e.g. 6F22)
Operating Temperature 0°C to +40°C (+32 to +104°F)
Storage Temperature -10°C to +50°C (+10 to +122°F)
Dimensions 185 x 84 x 38mm
Weight ±300g (battery included)
4.2 Electrical Specifications
4.2.1. DC Voltage
Range Resolution Accuracy
200mV 0.1mV ±0.5% of rdg + 1 digit
2V 1mV ±0.5% of rdg + 3 digits
20V 10mV ±0.5% of rdg + 3 digits
200V 100mV ±0.5% of rdg + 3 digits
1000V 1V ±0.8% of rdg + 3 digits
Input Impedance : 10MΩ
Overload Protection : 250V DC or rms AC for the 200mV-range, 1000V DC or 700V rms AC for the ranges 2V to
1000V
Max. Input Voltage : 1000V DC
NOTE
Make sure the test leads are actually touching the circuit when performing measurements in the lower voltage
ranges. The reading will fluctuate if the leads don’t touch the circuit.
DVM1090 GB 3
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