Amprobe AMP-300 Series Catalog Page

AMP-300 Series

Motor Maintenance TRMS Clamp Meters

The Modern Evolution of the Professional Clamp Meter

Amprobe’s AMP-300 Series True-RMS Clamp Meters offer a complete range of measuring
functions for modern industrial environments, motor testing and HVAC applications.

All models feature True-RMS sensing, low pass lters and fast response processors for

quick, error-free measurements. The Amp-Tip function allows for precise measurement of
current down to the tenth of an Amp, and a third input jack enables motor rotation and
3-phase sequence testing.

AMP-300 Series
Features

• True-RMS

• Motor Testing Capabilities

- Motor rotation

- 3-phase sequence testing

- Inrush current monitoring
during motor start-up

• HVAC Features

- Temperature measurement;
User selectable °F or °C

- DC Microamps for flame
sensor testing

- Capacitance measurement
for start and run motor
capacitors

• Amp-Tip Function

• Low Pass Filter for variable

frequency drives

• Safety Rated:

CAT III 600 V (AMP-310, AMP-320)
CAT IV 600 V, CAT III 1000 V (AMP-330)

AMP-310

AC Clamp Meter
HVAC

AMP-320

AC/DC Clamp Meter
Electrical Motor
Maintenance

AMP-330

AC/DC 1000 A Clamp Meter
Industrial Motor
Maintenance

AMP-300 Series Product Details

True-RMS

for accurate voltage

Non-contact voltage
detection (NCV)

measurements in noisy
environments.

Audible continuity and
diode test

Low pass lter

for current and voltage
measurements on variable

Data hold, relative zero,
MAX/MIN/AVG mode

frequency drives.

Large LCD backlit

Amp-Tip function

display

for precise low-current
measurement of small
diameter wires down to 0.1
Amp to help with electrical
system troubleshooting.

Safety rated

CAT III 600 V

(AMP-310, AMP-320)

CAT IV 600 V
CAT III 1000 V

(AMP-330)

AMP-300 Series Applications

• Accurate measurement of current,
voltage and frequency on all

electrical systems including distorted,
non-sinusoidal signals (True-RMS
function) and variable frequency drives

(low pass lter).

• Capacitance measurement for start

and run motor capacitors.

• Resistance and continuity functions to
verify quality of electrical connections and
to check if motor and transformer coils

are working properly.

• 3-phase Motor and Phase Rotation
Tests allow proper connection of a

motor to a 3-phase system. Improperly

connected motors will spin in a reverse
direction, which may destroy the motor

or equipment connected to it.

• Low Pass lter allows measurement of
current and voltage on variable frequency
drives (motors with speed controlled by

frequency). Without this feature, the

meter would provide erroneous readings

when measuring voltage and current.

Measurements:

Model AMP-310 AMP-320 AMP-330

Safety Rating

Voltage
AC Current
DC Current

Frequency
Resistance

Capacitance

Temperature

CAT III 600 V CAT III 600 V

Up to 600 V AC/DC Up to 600 V AC/DC Up to 1000 V AC/DC

Up to 600 A Up to 600 A Up to 1000 A

– Up to 600 A Up to 1000 A

5 to 999 Hz

0 to 60 kΩ

0.0 to 2500 µF

• • •

CAT IV 600 V

CAT III 1000 V

• DC Microamps output for measurement

of ame sensors. Test the proper
operation of the ame sensor safety
system in gas appliances. A broken

sensor in a gas appliance will prevent
the safety valve from opening and the

appliance will not work.

• Inrush current measurement for motor
start-up monitoring, allowing users to
verify that the motor is receiving the
required inrush current to support proper

motor start.

AMP-310

AC Clamp Meter HVAC

AMP-320 AC/DC Clamp Meter

Electrical Motor Maintenance

AMP-330 AC/DC 1000 A Clamp Meter

Industrial Motor Maintenance