4
INTRODUCTION
The 38XR-A is a true rms autoranging handheld digital
multimeter for measuring or testing the following:
• DC and AC Voltage
• DC and AC Current
• Resistance
• Frequency
• Dutycycle
• Temperature
• Capacitance
• Diodes
• Continuity
• dBm
• 4 - 20 mA Loop Current
Additional features include: MIN MAX AVG, HOLD, REL,
PEAK±, Range Lock, RS-232 IR communication, and Backlight.
MAKING MEASUREMENTS
Verify Instrument Operation
Before attempting to make a measurement, verify that
the instrument is operational and the battery is good. If
the instrument is not operational, have it repaired before
attempting to make a measurement.
Range Selection
In addition to autoranging the 38XR-A allows you to
manually select and lock a range by pressing the
RANGE
button.
RANGE
appears on the display to indicate that
manual ranging is active and the range is locked. When
appropriate, each subsequent press of the range button steps
the meter to the next higher range. When the highest range
is reached the next press returns the meter to the lowest
range. To return to autoranging press and hold the
RANGE
button for 2 seconds. If
RANGE
still shows on the display,
autoranging is not appropriate for the selected function.
Use autorange for all initial measurements. Then, when
appropriate, use the
RANGE
button to select and lock a range.
Summary of Contents for 38XR-A
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