Extech Instruments EX810, EX830, EX820 User Manual

User's Guide

Extech 800 Series
1000 Amp Clamp Meters
with IR Thermometer

EX810 AC Clamp meter
EX820 True RMS AC Clamp meter
EX830 AC/DC True RMS Clamp meter

EX800 Series Version 3.1 6/05 2

Introduction

Congratulations on your purchase of the EX800 Series Clamp device. The series consists
of the following models:

EX810 1000A AC Current Clamp meter
EX820 1000A True RMS AC Current Clamp
EX830 1000A True RMS AC/DC Current Clamp

All models measure:

 Infrared Temperature
 AC/DC Voltage
 Resistance
 Capacitance
 Frequency
 Continuity
 Diode

Model specific functions:

 EX830: DC Current, True RMS, Type K thermometer, DC Zero
 EX820: True RMS, Type K thermometer
 EX810: Average responding

The EX800 Series features:

 Auto Power OFF
 Max/Min recording
 Data Hold
 Peak Hold
 Backlit LCD display

Careful use of this meter will provide many years of reliable service.

EX800 Series Version 3.1 6/05 3

Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates the user must refer
to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal use, hazardous
voltages may be present

Double insulation

SAFETY NOTES

• Do not exceed the maximum allowable input range of any function.

• Do not apply voltage to meter when resistance function is selected.

• Set the function switch OFF when the meter is not in use.

• Remove the battery if meter is to be stored for longer than 60 days.

WARNINGS

• Set function switch to the appropriate position before measuring.

• When measuring volts do not switch to current/resistance modes.

• Do not measure current on a circuit whose voltage exceeds 600V.

• When changing ranges always disconnect the test leads from the circuit under test.

UL Note

A UL mark does not indicate that this product has been evaluated for accuracy.

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.

• 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.

Function Maximum Input

A AC, A DC (A DC on Model EX830 only) 1000A DC/AC
V DC, V AC 600V DC/AC
Resistance, Capacitance, Frequency, Diode Test 250V DC/AC
Type K Temperature (EX820 & EX830 only) 60V DC, 24V AC

EX800 Series Version 3.1 6/05 4

Description

Meter Description (EX830 pictured)

1. Current clamp

2. Clamp opening trigger

3. Data Hold Button

4. Mode

5. Peak

6. Range

7. DCA Zero (EX830 only)

8. MIN/MAX

9. Backlit LCD Display

10. Test lead input jacks

11. IR thermometer and laser pointer (rear)

12. Backlight Button

13. Laser pointer button

14. Function switch

Display icons Description

HOLD Data Hold
Minus sign Negative reading display
0 to 3999 Measurement display digits
ZERO DCA Zero (Model EX830 only)
P Peak value
AUTO Auto Range mode
DC/AC Direct Current / Alternating

Current
MAX Max reading
MIN Min reading
Low battery
mV or V Milli-volts or Volts (Voltage)
Ω Ohms (Resistance)
A Amperes (Current)
F Farad (Capacitance)
Hz Hertz (Frequency)

o

F and oC Fahrenheit and Celsius units (Temperature)

n, m, µ, M, k Unit of measure prefixes: nano, milli, micro, mega, and kilo

•

)

)

) Continuity test

Diode test

Laser pointer