2 Making Measurements
62 Keysight U1253B User’s and Service Guide
Frequency Counter
Set up the multimeter to measure frequency as shown in Figure 2-6. Probe the
test points and read the display.
– Use the frequency counter only for low voltage applications. Never use
the frequency counter on an AC power line system.
– For input more than 30 Vpp, you are required to use frequency
measurement mode available under the current or voltage measurement
instead of frequency counter.
– Press to select the Frequency Counter ( ) function. The default
input signal frequency is divided by 1. This allows signals of up to a maximum
frequency of 985 kHz to be measured.
– If the reading is unstable or zero, press to select division of input signal
frequency by 100 ( will be shown on the display). This allows for a higher
frequency range of up to 20 MHz to be measured.
– The signal is out of range if the reading is still unstable after the above step
has been performed.
– Press to scroll through the pulse width (ms), duty cycle (%), and
frequency (Hz) measurements.