Special Functions; Maintenance, Disposal, Battery And Fuse Replacement - VOLTCRAFT AT-200 Bedienungsanleitung

b) Resistance measurement, diode test,acoustic continuity
check and capacity measurement
Make sure that all the circuit parts, switches and components and
other objects to be measured are disconnected from the voltage
and currentless at all times.
Proceed as follows for the measurement:
- Connect the black measuring line with the COM socket
(7) and the red measuring line with the VΩ-socket (6) till
they are plane at the measuring instrument.
- Set the range selection switch (5) to position
CAP.
- You are in the resistance measurement range. You can
select the other measuring functions by pressing the
"MODE" button (9).
- Check the measuring lines for continuity by connecting
both measuring prods to one another. After that the
resistance value must be approx. 0 ohm.
- Now connect the measuring prods to the object to be
measured. As long as the object to be measured is not
high-resistive or is interrupted, the measured value will
be displayed on the display (1).
If you carry out a resistance measurement, make sure that the
measuring points which you contact with the measuring prods are
free from dirt, oil, solderable lacquer or similar. Such circum-
stances can falsify the measured result.
Make sure that the polarity of unipolar capacitors (polarised) is cor-
rect ("+" and "-").
The supplied multipurpose plug can be used for an easier handling.
As soon as "OL" (overload) appears on the display, you have excee-
ded the measuring range or the measuring circuit has been broken.
30

Special Functions

Auto power OFF function
In order to avoid that the operating life of the battery is shortened unnecessarily, an
automatic switch-off function has been implemented. If a button has not been pres-
sed or the rotary switch has not been activated for more than 35 minutes, the mea-
suring instrument will be switched off.
To switch on the measuring instrument again, first switch it off and then switch it on
again in the appropriate measuring range.
HOLD function
The HOLD function freezes the currently indicated measuring value to allow you to
read it or to take the record without rush.
If you test live wires make sure that this function is deactivated
before the measurement starts. Otherwise, a false measuring
result is simulated!
To switch on the HOLD function press the "HOLD" button; an acoustic signal con-
firms this action and "HOLD" appears on the display.
To deactivate the "HOLD" function again, press this button anew or activate the
rotary switch.
REL function
The REL function allows a reference value measurement to avoid possible line losses
which may caused e.g. during resistance measurements. For this purpose, the cur-
rent indicated value is set to zero. A new reference value is set.
Press the "REL" button to activate this measuring function. "REL" appears on the
display. The automatic measuring range selection is deactivated now.
To switch off this function, the "REL" button is to be pressed once more.
Maintenance, Disposal, Battery and Fuse
Replacement
Apart from occasional cleaning and fuse replacements, the multimeter requires no
servicing.
To clean the device or the display and measurement lines, use a clean lint-free anti-
static and dry cleaning cloth.
Note!
Do not use cleaning agents which contain carbon, petrol, alcohol or similar sub-
stances for cleaning purposes. The surface of the measuring instrument will be cor-
35