Extech Instruments EX330 User Manual

EX330-EU-ENG – V4.2 1/08
8
DC VOLTAGE MEASUREMENTS
CAUTION: Do not measure DC voltages if a motor on the circuit is being
switched ON or OFF. Large voltage surges may occur that can damage the
meter.
1. Set the function switch to the VDC position.
2. Insert the black test lead banana plug into the
negative COM jack.
Insert the red test lead banana plug into the
positive V jack.
3. Touch the black test probe tip to the negative
side of the circuit.
Touch the red test probe tip to the positive
side of the circuit.
4. Read the voltage in the display.

Extech Instruments EX330 Specifications

General

Type	Digital Multimeter
Display	LCD
Display Count	4000
DC Voltage Range	400mV to 600V
DC Current Range	400µA to 10A
AC Current Range	400µA to 10A
Resistance Range	400Ω to 40MΩ
Frequency Range	10Hz to 10MHz
Diode Test	Yes
Continuity Test	Yes
Data Hold	Yes
Auto Power Off	Yes
Battery Type	9V
Duty Cycle Range	0.1% to 99.9%

Summary

SAFETY INSTRUCTIONS

Input Protection Limits

CAUTIONS

Operating Instructions

NON-CONTACT AC VOLTAGE DETECTOR

Instructions for using the Non-Contact AC Voltage Detector function.

AC VOLTAGE MEASUREMENTS

DC VOLTAGE MEASUREMENTS

AC / DC CURRENT MEASUREMENTS

RESISTANCE MEASUREMENTS

CONTINUITY CHECK

Instructions for performing continuity checks using the meter.

DIODE TEST

CAPACITANCE MEASUREMENTS

Guide to measuring capacitance values with the multimeter.

FREQUENCY MEASUREMENTS

% DUTY CYCLE

CONTACT TEMPERATURE MEASUREMENTS

How to measure temperature using the supplied thermocouple probe.

BATTERY INSTALLATION and LOW BATTERY INDICATION

BATTERY REPLACEMENT

REPLACING THE FUSES

General Specifications

Safety

Safety information related to standards.