True RMS Multimeters
Making Basic Measurements
9
Measuring AC or DC Current (Models 111 and 112)
WWarning
To avoid personal injury or damage to the Meter:
• Never attempt to make an in-circuit current measure-
ment when the open-circuit potential to earth is
> 600 V.
• Check the Meter's fuse before testing. (See “Testing
the Fuse”)
• Use the proper terminals, switch position, and range
for your measurement.
• Never place the probes in parallel with a circuit or
component when the leads are plugged into the
current terminals.
Turn power OFF, break circuit, insert Meter in series, turn
power on.
A
A
aej08f.eps
Measuring Frequency
WWarning
To avoid electrical shock, disregard the bar graph for
frequencies > 500 Hz. If the frequency of the measured
signal is > 500 Hz, the bar graph is unspecified.
The Meter measures the frequency of a signal by counting the
number of times the signal crosses a trigger level each second.
The trigger level is 0 V, 0 A for all ranges.
Hz
AC/DC Voltage Frequency AC/DC Current Frequency
Hz
V
Hz
V
Hz
A
Hz
A
Hz
aej09f.eps
⇒ Press Hz to turn the frequency measurement function on and
off.
⇒ In frequency, the bar graph and range annunciator indicate
the AC or DC voltage or current present.
⇒ Select progressively lower ranges using manual ranging for a
stable reading.
To Next Page
Loading...
Need help?
General
