User manual

2 Making Measurements 
Measuring AC or DC Current (up to µA)
48 U1190A Series User’s Guide
Measuring AC or DC Current (up to µA)
This measurement function is applicable for the U1194A
model only.
Set up your clamp meter to measure AC or DC current (up
to A) as shown in Figure 2- 22. Probe the test points, and
read the display.
Figure 2-21 DC current display
WARNING
Never attempt an in-circuit current measurement where the
open-circuit potential to earth is greater than 1000 V. Doing so will
cause damage to the clamp meter and possible electric shock or
personal injury.
CAUTION
• To avoid possible damage to the clamp meter or to the equipment
under test, use the proper terminals, function, and range for your
measurement. Use the clamp jaw for currents above 600 µA.
•
To measure current, you must open the circuit under test, then place
the clamp meter in series with the circuit.
Never place the probes
across (in parallel with) any circuit or component when the leads
are plugged into the current terminals.
• Placing the probes across (in parallel with) a powered circuit when
a lead is plugged into a current terminal can damage the circuit you
are testing. This happens because the resistance through the clamp
meter's current terminals is very low, resulting in a short circuit.
U119XA UG.book Page 48 Thursday, September 15, 2011 4:03 PM