Frequency Measurements; Duty Cycle; Contact Temperature Measurements - Extech Instruments EX330 User Manual

FREQUENCY MEASUREMENTS

1. Use the MODE button to view the Hz unit of
measure on the LCD display.
2. Insert the black test lead banana plug into
the negative COM jack and the red test
lead banana plug into the positive Hz jack.
3. Touch the test probe tips to the circuit under
test.
4. Read the frequency on the display.

% DUTY CYCLE

1. Set the rotary function switch to the Hz/% position.
2. Use the MODE button to view the % unit of measure on the LCD display.
3. Insert the black lead banana plug into the negative COM jack and the
red test lead banana plug into the positive Hz jack.
4. Touch the test probe tips to the circuit under test.
5. Read the % duty cycle on the display.

CONTACT TEMPERATURE MEASUREMENTS

1. Set the function switch to the ºF or ºC position.
2. Insert the Temperature Probe into the input jacks,
making sure to observe polarity.
3. The probe can be pressed against a device under
test to read its temperature or the probe can be held
in air to read the ambient temperature. Allow 30
seconds for the display to stabilize.
4. Read the temperature in the display.
Note: The temperature range of the supplied thermocouple
probe is -20 to 250°C (-4 to 482°F)
EX330-EU-ENG – V4.2 1/08
12