Справочник Пользователя для Voltcraft VC850 Digital Multimeter with Software included 6000 counts CAT IV 600V, CAT III 1000V VC850

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If “OL” (overload) appears on the display, you have exceeded the measuring range or the measuring
circuit has been broken. Pressing the “REL” button again switches off the relative function and activates
the auto range function.
-
After measuring, remove the measuring lines from the measured object and turn the DMM off.
If you carry out a resistance measurement, make sure that the measuring  points you touch with
the test prods are free from dirt, oil, solderable lacquer or the like. Such circumstances can falsify
the measured result.
f) Diode Test
Make sure that all the circuit parts, switches and components and other objects of measu-
rement are disconnected from the voltage and discharged.
-
Turn the DMM on and select measuring range 
The
diode symbol appears in the display.
-
Plug the red measuring line into the Ω  measuring jack and
the black measuring line into the COM measuring jack (8) .
-
Check the measuring lines for continuity by connecting
both measuring prods with one another. The value must
be approximately 0.000 V.
-
Now connect the two measuring prods with the object to
be measured (diode).
-
The display shows the continuity voltage “UF” in volt (V).
If “OL” appears, the diode is measured in reverse direc-
tion (UR) or the diode is faulty (interruption). Perform a
counter-pole measurement to check.
-
After measuring, remove the measuring lines from the
measured object and turn the DMM off.