Important safety information. Refer to the manual. Dangerous voltage may be present. Before you use the meter, inspect the case. Pay particular attention to the insulation surrounding the connectors Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity.
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Important safety information. Refer to the manual. Dangerous voltage may be present. Before you use the meter, inspect the case. Pay particular attention to the insulation surrounding the connectors Inspect the test leads for damaged insulation or exposed metal.
Check the test leads for continuity. Replace damaged test leads before you use the meter. This meter is designed to be indoor use. Protection may be impaired. When in doubt, have the meter serviced. Do not operate the meter around explosive gas, vapor, or dust. Do not apply more than the rated voltage, as marked on the meter, between terminals or between any terminal and earth ground.
When measuring current, turn off circuit power before connecting the meter in the circuit. Remember to place the meter in series with the circuit. When servicing the meter, use only specified replacement parts. Use with caution when working above 30V ac rms, 42V peak, or 60V dc. Such voltages pose a shock hazard. When using the probes, keep your fingers behind the finger guards on the probes. Connect the common test lead before you connect the live test lead. When you disconnect test leads, disconnect the live test lead first.
Remove the test leads from the meter before you open the battery door. Do not operate the meter with the battery door or portions of the cover removed or loosened. To avoid false readings, which could lead to possible electric shock or personal injury, replace the batteries as soon as the low battery indicator " " appears. Remaining endangerment: When an input terminal is connected to dangerous live potential it is to be noted that this potential at all other terminals can occur!
Examples are measurements on circuits not derived from mains, and specially protected internal MAINS-derived circuits. In the latter case, the transient stresses are variable; for that reason, its necessary that the transient-withstand -capability of equipment is made known to the user. Use the proper terminals, function, and range for your measurements. Before rotating the range switch to change functions, disconnect test leads from the circuit under test.
Before attempting to insert transistors for testing, always be sure that the test leads have been disconnected from any measurement circuits. Remove test leads from the meter before opening the Meter case. Do not use abrasives or solvents. Some models also provide transistor test function, signal output or performing continuity test.
Overload protection and low battery indication are provided. Following table shows functions of the series multimeters.
DT830B Digital Multimeter
If the voltage to be measured is not known, set the range switch at the highest range position and then reduce it until a satisfactory resolution is obtained. Read the voltage value and polarity on the LCD display. For measuring currents between mA and 10A, insert the red lead into the "10A" unfused jack. Note: If the resistor being measured is connected to a circuit, turn off power and discharge all capacitors before applying measurements! Transistor test Before attempting to insert transistors into the socket for testing, always be sure that test leads have been disconnected from any measurement circuits. Also, components should not be connected to the hFE socket when making voltage measurements with the test leads!
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