Operation; Measuring; Null Balance - VOLTCRAFT VC5070 Notice D'emploi

Operation

Prior to working with the measuring device, you have to insert the enclosed batteries. Insert the batteries
as described in chapter "Cleaning and Maintenance".
Rotary switch (5)
The individual measuring functions can be set via the rotary switch. If the rotary switch is set to "OFF",
the measuring device is switched off. Always turn off the device when it is not in use.
Auto power-off function
If the rotary switch is not moved for about 20 minutes, the multimeter shuts down automatically. This pre-
vents the batteries from discharging prematurely.
During operation the power indicator (12) is lit. If the power indicator goes out although the rotary switch
is not in the "OFF" position, auto power-off is active. To restart, remove the test prods from the test object
and switch the measuring device to OFF (10). Select the desired measuring range and continue mea-
suring. The power indicator (12) lights up and the measuring device is ready.

Measuring

Do not exceed the permitted max. input values. Never touch circuits or parts of cir-
cuits with a possible voltage of more than 25 V/ACrms or 35 V/DC! Danger to life!
Before measuring, check the connected measuring lines for damage such as, for
example, cuts, cracks or pinches. Replace defective measuring lines immediately by
new ones, defective measuring lines may not be used any longer! Danger to life!
Before changing the measuring range, the test prods have to be removed from the
test object.
Always start measuring with the largest measuring range. Then gradually switch down to
achieve an exact measuring result. Results are most accurate in medium scale range
(scale range approx. 70 - 110°).
The measuring ranges on the rotary switch correspond to the scale end value. For reading, always
select the corresponding value (e.g. scale 50 for the measuring ranges 50 and 500).
Make sure that the voltage measurement switch "Vrms" (8) is in the "Vrms" position when measuring
(except for V/AC) to avoid faulty measurements.
a) Null balance
Before measuring, always perform null balancing using the calibration screw (3) (scale value 0V). There
must be no measuring signal on the measuring lines.
28