Extech Instruments EX411A User manual

®

INSTRUMENTS


   
CE
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

Introduction
 
  
  
Safet
International Safety Symbols

A

WARNING 
CAUTION 
rMAX
_soov
  

 


WARNING 
    
CAUTION 
  
  


  

EX411A-en-GB_v5.0 6/16
3
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 interference to devices in the
home; in this case the operator can be required to carry out adequate measures to prevent
interference.
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 children could swallow. In case a child swallows any of the parts,
please contact a physician immediately.
Do not leave batteries and packing material unattended; they can be dangerous for children.
In case the device is going to be unused for an extended period of time, remove the batteries
to prevent them from draining.
Expired or damaged batteries can cause cauterization on contact with skin. Always use
suitable hand protection.
See that the batteries are not short-circuited. Do not throw batteries into fire.

EX411A-en-GB_v5.0 6/16
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OVERVOLTAGE CATEGORY III
This meter meets the IEC 61010-1 (EN61010-1) 3rd edition (2010) standard for OVERVOLTAGE
CATEGORY III. Cat III meters are protected against overvoltage transients in fixed installation at the
distribution level. Examples include switches in the fixed installation and some equipment for
industrial use with permanent connection to the fixed installation.
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 600V DC/AC, 200Vrms on 200mV range
mA DC 200mA 600V fast acting fuse
A DC 10A 600V fast acting fuse (30 seconds max every 15 minutes)
Ohms, Continuity 250Vrms for 15sec max
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 battery.
7. NEVER operate the meter unless the back cover and the battery cover is in place and fastened
securely.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com




 
  

 
 



 

 
 
 

 




 
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

EX411A-en-GB_v5.0 6/16
11
Specifications
Function Range Resolution Accuracy
DC Voltage
(V DC)
200mV 0.1mV

(0.3% reading + 2 digits)
2V 0.001V
(0.5% reading + 2 digits)
200V 0.1V
600V 1V

(0.8% reading + 2 digits)
AC Voltage
(V AC)
(True rms)
50 to 400Hz 400Hz to 1kHz
2V 0.001V

(1.0% reading +6
digits

(2.0% reading + 8 digits
200V 0.1V

(1.5% reading +6
digits

(2.5% reading +8 digits
600V 1V

(2.0% reading +6
digits

(3.0% reading +8 digits
DC Current
(A DC)
200A 0.1

A (1.5% reading + 3 digits)
200mA 0.1mA
10A 0.01A

(2.5% reading + 3 digits)
AC Current
(A AC)
(True rms)
50 to 400Hz 400Hz to 1kHz
200mA 0.1mA

(1.8% reading +8 digits

(2.5% reading +10
digits)
10A 0.01A

(3.0% reading +8
digits)

(3.5% reading +10
digits)
Resistance 2000.1


(0.8% reading +4 digits)
2000

1


(0.8% reading +2 digits)
20k0.01k

(1.0% reading +2 digits)
200k0.1k

20M0.01M


(2.0% reading +5 digits)
Temperature -20 to
750ºC
1ºF (3.0% reading +3 digits)
(meter only, probe accuracy not included)
-4 to 1382ºF 1ºC
NOTE: Accuracy specifications consist of two elements:
(% reading) – This is the accuracy of the measurement circuit.
(+ digits) – This is the accuracy of the analog to digital converter.
NOTE: Accuracy is stated at 18oC to 28oC (65oF to 83oF) and less than 75% RH.

EX411A-en-GB_v5.0 6/16
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General Specifications
Diode Test Test current of 1mA maximum, open circuit voltage 2.8V DC typical
Continuity Check Audible signal will sound if the resistance is less than approximately
150
Input Impedance 10MΩ
AC Response True rms
ACV Bandwidth 50Hz to 1kHz
DCA voltage drop 200mV
Display 3 ½ digit, 2000 count LCD, 0.9” digits
Auto-Power Off 15 minutes (approximately)
Overrange indication “1” is displayed
Polarity Automatic (no indication for positive polarity); Minus (-) sign for negative
polarity.
Measurement Rate 2 times per second, nominal
Low Battery Indication “ ” is displayed if battery voltage drops below operating voltage
Battery One 9 volt (NEDA 1604) battery
Fuses mA, µA ranges; 0.2A/600V fast blow
A range; 10A/600V ceramic fast blow
Operating Temperature 5ºC to 40ºC (41ºF to 104ºF)
Storage Temperature -20ºC to 60ºC (-4ºF to 140ºF)
Operating Humidity Max 80% up to 31ºC (87ºF) decreasing linearly to 50% at 40ºC (104ºF)
Storage Humidity <80%
Operating Altitude 2000 meters (7000ft.) maximum
Weight 342g (0.753lb) (includes holster)
Size 187 x 81 x 50mm (7.36” x 3.2” x 2.0”) (includes holster)
Safety For indoor use and in accordance with the requirements for double
insulation to IEC 61010-1 (EN61010-1) 3rd edition (2010); Overvoltage
Category III 600V; Pollution Degree 2.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

EX411A-en-GB_v5.0 6/16
14
REPLACING THE FUSES
WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads
from the input terminals, and turn OFF the meter before opening the case. Do not operate the meter
with an open case.
1. Disconnect the test leads from the meter.
2. Remove the protective rubber holster.
3. Remove the battery cover (two “B” screws) and the
battery.
4. Remove the four “A” screws securing the rear cover.
5. Lift the center circuit board straight up from the
connectors to gain access to the fuse holders.
6. Gently remove the old fuse and install the new fuse
into the holder.
7. Always use a fuse of the proper size and value
(0.2A/600V fast blow for the 200mA range,
10A/600V fast blow for the 10A range).
8. Align the center board with the connectors and gently press into place.
9. Replace and secure the rear cover, battery and battery cover.
WARNING: To avoid electric shock, do not operate your meter until the fuse cover is in place and
fastened securely.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com