Velleman DVM68 Manual Del Usuario página 3

DVM68 – AUTORANGING DIGITAL MULTIMETER
1. Description
Your DVM 68 is a autoranging professional digital multimeter with a 3 ¾ digit LCD display. It is ideally suited for field,
lab, shop, and home applications. By using the latest in IC and display technology to significantly reduce the number
of discrete internal components, the multimeter gives you superb measuring capability as well as the highest possible
reliability.
It is capable of performing functions :
DC Voltage
AC Current
Frequency
Also diodes and transistors (amplification hFE) can be tested.
1.1 Warning
Use extreme caution in the use of this device. Improper use of this device can result in injury or death. Follow all
safeguards suggested in this owner's manual in addition to normal safety precautions in dealing with electrical
circuits. Do not use this device if you are unfamiliar with electrical circuits and testing procedures.
Not for commercial or industrial use.
1.2 A word about safety
This multimeter is designed to ensure the safest operation possible. However, safe operation depends on you, the
operator. Make sure you follow these simple safety rules :
• Never apply a voltage to the multimeter that exceeds the limits given in the specifications. Never apply more than
1000V DC or 750V rms AC between an input jack and ground.
• Use extreme caution when working with voltages above 60V DC or 30V AC rms.
• Always discharge filter capacitors in the power supply circuit under test before you attach test leads.
• Never connect to a source of voltage when you select DCA, ACA, resistance measurement or continuity check
function.
• Always turn off power and disconnect the test leads before you replace the batteries or fuse.
• Never operate the multimeter unless the battery cover is in place and fully closed.
When carrying out measurements on TV or switching power circuits, always remember that there may be high
amplitude voltages pulses at test points which can damage the meter.
1.3 Maintenance
Your DVM 68 is an example of superior design and craftsmanship. The following suggestions will help you care for
the multimeter so you can enjoy it for years :
• Keep the multimeter dry. If it gets wet, wipe it dry immediately.
• Use and store the multimeter only in normal temperature environments. Temperature extremes can shorten the
life of electronic devices or damage batteries.
• Handle the multimeter gently and carefully. Dropping it can damage the circuit boards and case and can improper
functioning.
• Use only fresh batteries of the required size and type. Always remove old or weak batteries.
If you do not plan to use the multimeter for a month or more, remove the batteries. This protects the multimeter
from possible leakage.
• Disconnect the test probes before opening the multimeter.
• Replace blown fuses only with same size and type :
F1 : F 300mA/250V
DVM68
AC Voltage
DC Current
Continuity
F2 : F 10A/250V
Resistance
Capacity
- 3 - VELLEMAN