C) Current Measuring "A" 10 - VOLTCRAFT MULTI-DMM MT-52 - V09-10 Operating Instructions Manual

Use the "Hz%" button (11) to switch the display to frequency (Hz) and pulse length (%).
Each press switches the function. Autorange is deactivated. This enables monitoring of
possible ripple voltage (superimposed alternate voltage). In case of pure direct voltage, the
frequency and % displays are "zero". Without a measured signal, phantom values may be
displayed. They disappear when a direct voltage is measured.

c) Current Measuring "A" 10

The voltage in the measuring circuit may not exceed 600 V.
Do not measure any currents above 10 A in the 10A range and no currents above 400
mA in the µA/mA range, otherwise the fuses trigger.
Measuring >5 A may only be performed for max. 30 seconds and at 15 minute inter-
vals.
Always start current measurements at the highest measurement range and switch down to lower ranges
if necessary. Before changing the measurement range, always shut off the circuit. All current measuring
ranges are secured with fuses and thus protected against overload.
Proceed as follows to measure "A-DC" direct current:
- Turn the DMM on and select measuring function "A".
The table shows the different measuring functions and
possible measuring ranges. Select your measuring range
and the respective measuring jacks. The display indicates
"DC".
Measuring Measuring
function range
µA <4000 µA
mA 4mA – 399 mA
10A 400 mA – 10 A
- Insert the red measuring line into the µA/mA or 10A mea-
suring jack. Plug the black measuring line into the COM
socket.
- Now connect the two measuring prods in series to the object to be measured (battery, switch etc.).
The polarity of the respective measured value is indicated on the display together with the measured
value.
After measuring, remove the measuring lines from the measured object and turn the DMM off.
44
Measuring
jacks
COM + mAµA
COM + mAµA
COM + 10A
When a minus "-" appears in front of the measured value when measuring DC, the
measured voltage is negative (or the measuring lines have been swapped).