Extech EX505-K Instruction Manual

User's Guide

Autoranging True RMS Multimeter

Extech EX505

Introduction

Congratulations on your purchase of the Extech EX505 True RMS Autoranging Multimeter. This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Diode Test, and Continuity plus Thermocouple Temperature. It features a waterproof, rugged design for heavy duty use This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.

Safety

This symbol adjacent to another symbol, terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter.

WARNING

CAUTION

MAX 1000V

PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY

OVERVOLTAGE CATEGORY I

Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level.

Note – Examples include protected electronic circuits.

OVERVOLTAGE CATEGORY II

Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation.

Note – Examples include household, office, and laboratory appliances.

OVERVOLTAGE CATEGORY III

Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations. Note – Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation.

OVERVOLTAGE CATEGORY IV

Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. Note – Examples include electricity meters and primary over-current protection equipment

This WARNING symbol indicates a potentially hazardous situation, which if not avoided, could result in death or serious injury.

This CAUTION symbol indicates a potentially hazardous situation, which if not avoided, may result damage to the product.

This symbol advises the user that the terminal(s) so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds (in this case) 1000 VAC or VDC.

This symbol adjacent to one or more terminals identifies them as being associated with ranges that may, in normal use, be subjected to particularly hazardous voltages. For maximum safety, the meter and its test leads should not be handled when these terminals are energized.

This symbol indicates that a device is protected throughout by double insulation or reinforced insulation.

EX505-EU_ENG V6.3 11/07

CAUTIONS

• Improper use of this meter can cause damage, shock, injury or death. Read and understand this user manual before operating the meter.

• Always remove the test leads before replacing the battery or fuses.

• Inspect the condition of the test leads and the meter itself for any damage before

operating the meter. Repair or replace any damage before use.

• Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC. These voltages are considered a shock hazard.

• Warning! This is a class A equipment. This equipment can cause interferences in the living quarters; in this case the operator can be required to carry out adequate measures.

• Always discharge capacitors and remove power from the device under test before performing Diode, Resistance or Continuity tests.

• Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the recessed electrical contacts. Other means should be used to ensure that the terminals are not "live".

• If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

• This device is not a toy and must not reach children’s hands. It contains hazardous objects as well as small parts that the children could swallow. In case a child swallows any of them, please contact a physician immediately

• Do not leave batteries and packing material lying around unattended; they can be dangerous for children if they use them as toys

• In case the device is going to be unused for an extended period of time, remove the batteries to prevent them from training

• Expired or damaged batteries can cause cauterization on contact with the skin. Always, therefore, use suitable hand gloves in such cases

• See that the batteries are not short-circuited. Do not throw batteries into the fire.

EX505-EU_ENG V6.3 11/07

SAFETY INSTRUCTIONS

This meter has been designed for safe use, but must be operated with caution. The rules listed below must be carefully followed for safe operation.

1. NEVER apply voltage or current to the meter that exceeds the specified maximum:

Input Protection Limits

Function Maximum Input

V DC or V AC 1000VDC/AC rms

mA AC/DC 400mA AC/DC

A AC/DC 10A AC/DC (20A for 30 sec)

Frequency, Resistance, Capacitance, Diode Test, Continuity, Temperature

2. USE EXTREME CAUTION when working with high voltages.

3. DO NOT measure voltage if the voltage on the "COM" input jack exceeds 600V above earth ground.

4. NEVER connect the meter leads across a voltage source while the function switch is in the current, resistance, or diode mode. Doing so can damage the meter.

5. ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests.

6. ALWAYS turn off the power and disconnect the test leads before opening the covers to replace the fuse or batteries.

7. NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely.

8. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

600VDC/AC rms

EX505-EU_ENG V6.3 11/07

Controls and Jacks

1. 4,000 count LCD display

2. RANGE button

3. Hz and % button

4. Mode button

5. Function switch

6. mA, µA and 10A input jacks

7. COM input jack

8. Positive input jack

9. Backlight button

10. REL button

11. HOLD button

Note: Tilt stand and battery compartment are on rear of unit.

Symbols and Annunciators

•))) Continuity

Diode test

Battery status n nano (10 µ micro (10 m milli (10 A Amps k kilo (10 F Farads (capacitance) M mega (10 Ω Ohms Hz Hertz (frequency) V Volts % Percent (duty ratio) REL Relative AC Alternating current Auto Autoranging DC Direct current HOLD Display hold ºF Degrees Fahrenheit ºC Degrees Centigrade

-9

) (capacitance)

-6

) (amps)

-3

) (volts, amps)

) (ohms)

EX505-EU_ENG V6.3 11/07

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