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Data Sheet
AC71B
Automatic AC Clamp
Multimeter
The automatic everything clamp meter
The AC71B is a digital clamp multimeter with two additional
unique features: AutoTect™ and automatic backlight. The AutoTect™ feature automatically senses what type of measurement is
being made when the test leads are placed across a measurement
point. There is no knob to turn. The meter knows what is being
measured and the digital display shows the measured value along
with the associated unit icon. AutoTect™ also utilizes a lower
input impedance. This helps determine if voltage is from leakage
(called ghost voltages) or a hard connection. Any ghost voltages
will be zeroed out by the lower input impedance.
The automatic backlight has a sensor that recognizes when the
ambient light becomes dim and turns itself on. A bright blue backlight is then available to easily read the measurement value on
the digital display.
The AC71B is a complete multimeter measuring AC and DC
volts, resistance, continuity in addition to the AC current.
A useful tool for the electrician, plant maintenance, HVAC or
field service technician.
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charges.
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In the unlikely event
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Tool requires warranty
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it, on the spot.
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Amprobe® Test Tools
AutoTect™ Function – automatically selects AC volts, DC volts or ■
resistance depending upon measurement point
Automatic bright blue backlight turns on when a dark
■
environment is sensed
Easy one-button control
■
AC current to 600 A ■
AC volts to 750 V ■
DC volts to 1000 V ■
Resistance and Continuity Beeper ■
Data Hold ■
Conductor size 1.25 in, 32 mm, 750 MCM ■
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AC71B Automatic AC Clamp Multimeter
Data Sheet
General Specifications
Display 6000 digit large scale liquid crystal display (LCD)
Measuring Rate 5 times per second
Overrange Display OL is displayed
Automatic Power Off Time Approximately 30 minutes after power on Low Battery Indication The battery symbol is displayed when
the battery voltage drops below the operating level for accurate results.
Power Single standard 9 V battery, NEDA160A
Battery Life 250 hours with an alkaline 9 V battery
Environmental Indoor use
Operating Temperature 0 °C to 30 °C at ² 80 % R.H.
30 °C to 40 °C at ² 75 % R.H.
40 °C to 50 °C at ² 45 % R.H.
Storage Temperature -20 °C to 60 °C at 0 to 80 % R.H. (battery removed)
Altitude 2000 m (6562 ft)
Conductor Size 32 mm diameter (1.3 in)
Max. Operation Time Delay Time = 30s for input ² 30 V
Shock Vibration Sinusoidal vibration per MIL-PRF-28800F (5 to 55 Hz, 3 G maximum)
Agency Approvals CE, cCSAus
Safety Conforms to EN61010-1:2001; CAT II 1000 V, CAT III 600 V, Pollution degree 2, Class 2
EMC Conforms to EN61326-1.
Amprobe® Test Tools
www.Amprobe.com
AC71B Automatic AC Clamp Multimeter
Data Sheet
Electrical Specifications
Function Range Accuracy
Electrical Specifications ± (% reading + number of digits) at 23 °C ± 5 °C at <80 % R.H.
Temperature Coefficient: add 0.2 x (Specified Accuracy)/°C, < 18 °C , >28 °C
Voltage
Voltage AC (50 to 500 Hz) 1.3 V to 750.0 V ±(1.5% + 3 dgt)
Voltage DC 1.8 V to 1000.0 V ±(1% + 2 dgt)
-0.6 V to -1000.0 V ±(1% + 4 dgt)
Overvoltage Protection 1000 V DC/750 V AC
Input Impedance≥ 4 kW for input voltage up to 30 V. Impedance increases with input voltage to
approximate 300 kW at 1000 V/277 kW at 750 V AC.
Resistance
Resistance and 0.0 W to 99.9 W ±(2% + 1 W)
Continuity 100.0 W to 2000 W ±(2% + 2 dgt)
Overload Protection 1000 V DC / 750 V RMS
Maximum Open Circuit Voltage 1.5 V
Continuity Check
Internal sounds activate if the resistance of the circuit under test is less than 25 W. It will then turn off if the resistance is increased
beyond 150 W. Temperature coefficient multiply by 1.5 when operating temperature is 40 °C to 50 °C.
AC Current
AC Current (50 to 60 Hz) 0.0 to 60.0 A ±(1.9% + 2 A)
60.0 to 400.0 A ±(1.9% + 5 A)
401 to 500.0 A ±(2.5% + 7 A)
501 to 600.0 A* ±(3% + 10 A)
Overload Protection 0 to 500 A: Continuous operation
* 501 A to 600 A: 10 minutes maximum followed by 10 minute cooling period
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AC71B Automatic AC Clamp Multimeter
Included accessories
Test leads, carrying case and users manual
Optional accessories
TL36A Heavy duty test leads with threaded alligator clips
Data Sheet
Amprobe® Test Tools
website: www.Amprobe.com
email: info@amprobe.com
Everett, WA 98203
Tel: 877-AMPROBE
Amprobe® Test Tools Europe
In den Engematten 14
79286 Glottertal, Germany
Tel.: +49 (0) 7684 8009 - 0
Amprobe® Test Tools
©2007 Am probe Test Tools. All rights res erved.
9/20 07 2428655 D-US -N Rev B
www.Amprobe.comwww.Amprobe.com
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