Introduction
The Southwire 21010N Clamp Meter measures AC current,
AC/DC voltage, resistance, capacitance, frequency, duty cycle,
and temperature. It also tests diodes, continuity, and non-con-
tact AC voltage. This meter is fully tested and calibrated and,
with proper use, will provide many years of reliable service.
1
• 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.
WARNINGS
Input Limits
Function Maximum Input
Amperage AC 400A AC
Voltage AC, Voltage DC 600V AC/DC
Frequency, Duty Cycle, 600V AC/DC
Resistance, Diode Test,
Continuity, Capacitance
Temperature (°F/°C) 250V AC/DC
General Specifications
2
Clamp size
Diode Test
Continuity Check
Low Battery Indication
Overrange Indication
Measurements Rate
Input Impedance
Display
AC Current
AC Voltage bandwidth
Operating Temperature
Storage Temperature
Operating Humidity
Storage Humidity
Operating Altitude
Over voltage
Batteries
Auto OFF
Dimensions/Weight
Opening 1.2" (30mm) approx.
Test current of 0.3mA typical;
Open circuit voltage 1.5V DC typical.
Beeper on <30Ω, Beeper off >150Ω;
Test current 0.5mA
“ ” is displayed
“OL” is displayed
2 per second, nominal
10MΩ (VDC and VAC)
4000 counts LCD
50-60Hz (AAC)
50-400Hz (VAC)
41 to 104°F (5 to 40°C)
-4 to 140°F (-20 to 60°C)
80% maximum
<80%
7000 ft. (2000meters) maximum
CAT III 600V
Two “AAA” 1.5 V Batteries
approx. 30 minutes
7.875”x 2.6”x 1.5”/ 0.45 lb. (200x66x37mm/205g)
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