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

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At the back of the measuring device, an optically isolated interface is located. It serves to transfer data to
a PC for further processing.
The data connection to a free interface of your computer can be created with optional serial data cables
(RS232 or USB).
Slide the interface cover (11) from the housing upwards. Align the wedge-shaped adapter of the optional
interface cable flush with the housing groove (11) at the measuring device from above.
The interface is switched off in normal operation. To activate it, keep the “REL/PC” button pressed for 
2 seconds when the DMM is switched on. Activation is indicated by the interface symbol 

and a short

beep. For deactivating, keep the “REL/PC” button pressed for approx. 2 s or switch off the DMM. 

The optional data cables are available under the following order no.:
Order No. 12 56 40 RS232
Order No. 12 03 17 USB

The display can be lighted in low light. Lighting turns of automatically after approx. 10s.
For switching it on, hold down the “LIGHT” button (10) for about 2 seconds. For switching off the lighting
prematurely, keep the “LIGHT” button pressed again for approx. 2 s or switch off the DMM.

In all measuring ranges for alternating values, it is possible to display the frequency or pulse ratio (duty
cycle) for the positive half-wave in %. The measuring function does not have to be changed via the rotary
switch.
Switching is also possible via the “Hz%” button (10). All yellow measuring functions at the rotary switch
are switched whenever this button is pressed.