38394 V3.3 8/08
2
Introduction
Congratulations on your purchase of Extech’s 38394 AC/DC Clamp Meter. This clamp
meter measures AC/DC Current to 600A, DC/AC Voltage, Resistance, Frequency,
Diode, and Continuity. This meter is shipped fully tested and calibrated and, with proper
use, will provide years of reliable service.
Safety
Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must
refer to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use, hazardous
voltages may be present
Double insulation
WARNING:
This indicates that a potentially hazardous condition which, if not avoided,
could result in death or serious injury.
CAUTION:
This indicates that a potentially hazardous condition which, if not avoided,
could result in injury or damage to the meter.
Safety Precautions
WARNING
: Improper use of this meter can cause damage, shock, injury or death. Read and
understand this User Guide before operating the meter.
1.
Always remove the test leads before making current measurements
2.
Always remove the test leads before replacing the batteries
3.
Inspect the condition of the clamp jaw, test leads and the meter for any damage
before operating the meter. Repair any damage or replace meter before use
4.
Do not exceed the maximum rated input limits
5.
Use great care when making measurements, especially when the voltages are
greater than 25VAC rms or 35VDC. These voltages are considered a shock hazard
6.
Always discharge capacitors and remove power from the DUT (device under test)
before performing Resistance or Continuity tests
7.
Remove the batteries from the meter if the meter is to be stored for long periods
8.
Ensure that the selected meter function matches the measurement to be taken
9.
If the measured current is higher than the range selected for long periods,
overheating may occur compromising the safety and the operation of the meter’s
internal circuits
10.
To avoid discharge risks and erroneous readings, do not measure current on high
voltage conductors (>600V)
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