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Introduction
The Southwire 21030T True RMS AC Clamp Meter measures
AC current, AC/DC voltage, resistance, capacitance, frequency,
duty cycle, and temperature. It also tests diodes, continuity, and
non-contact AC voltage. This meter is fully tested and calibrated
and, with proper use, will provide many years of reliable service.
WARNINGS
• Read, understand and the follow Safety Rules and Operating
Instructions in this manual before using this meter.
• The meter's safety features may not protect the user if not used
in accordance to the manufacturer's instructions.
• Ensure that the test leads are fully seated in the input jacks and
keep fingers away from the metal probe tips when taking
measurements.
• Before changing functions using the rotary selector switch,
always disconnect the test leads from the circuit under test.
• Use only UL listed test leads with the proper safety category rating.
• Comply with all safety codes. Use approved personal protective
equipment when working near live electrical circuits - particularly
with regard to arc-flash potential.
• Use caution when working on or near bare conductors or bus bars.
• Use caution on live circuits. Voltages above 30 V AC RMS,
42 V AC peak, or 60 V DC pose a shock hazard.
• Do not use the meter in wet or damp environments or during
electrical storms.
• Do not use the meter near explosive vapors, dust or gasses.
• Do not use the meter if it operates incorrectly.
Protection may be compromised.
• Do not operate meter while Low Battery warning is on.
Replace batteries immediately.
• Verify meter's operation by measuring a known voltage.
• Do not apply voltage or current that exceeds the meter's
maximum rated input limits.
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Input Limits
Function
Amperage AC
Voltage AC, Voltage DC
Frequency, Duty Cycle,
Resistance, Diode Test,
Continuity, Capacitance
Temperature (°F/°C)
General Specifications
Clamp size
Opening 1.2" (30mm) approx.
Diode Test
Test current of 0.3mA typical;
Open circuit voltage 1.5V DC typical.
Continuity Check
Beeper on <30Ω, Beeper off >150Ω;
Test current 0.5mA
Low Battery Indication
" " is displayed
Overrange Indication
"OL" is displayed
Measurements Rate
2 per second, nominal
Input Impedance
10MΩ (VDC and VAC)
Display
4000 counts LCD
AC Current bandwidth
50-60Hz (AAC)
AC Voltage bandwidth
50-400Hz (VAC)
Operating Temperature
41 to 104°F (5 to 40°C)
Storage Temperature
-4 to 140°F (-20 to 60°C)
Operating Humidity
80% maximum
Storage Humidity
<80%
Operating Altitude
7000 ft. (2000 meters) maximum
Over voltage
CAT III 600V
Batteries
Two "AAA" 1.5 V Batteries
Auto OFF
approx. 30 minutes
Dimensions/Weight
7.875"x 2.6"x 1.5"/ 0.45 lb.
Maximum Input
400A AC
600V AC/DC
600V AC/DC
250V AC/DC
(200x66x37mm/205g)
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