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EX230-EU-EN-V1.2-09/10 

5

Controls and Jacks  

1. IR 

Thermometer 

2. Laser 

Pointer 

3.  4000 count LCD  
4. MAX 

button 

5. MODE 

button 

6. FUNCTION 

switch 

7.  mA, µA and 10A input jacks 
8.  IR Thermometer button  
9. HOLD 

button 

10. RANGE button  
11. Positive input jack 
12. COM input jack  

 

Note: 

Tilt stand, test lead holders, and battery compartment are on rear of unit. 

 

 

 

 

Symbols and Enunciators 

 

 Continuity 

 Diode 

test 

n nano 

(10

-9

) (amps, cap) 

µ micro 

(10

-6

) (amps, cap) 

m milli 

(10

-3

) (volts, amps, cap) 

A Amps 
k kilo 

(10

3

) (ohms, Hz) 

M mega 

(10

6

) (ohms, Hz) 

Ω 

Ohms 

V Volts 
AC Alternating 

current 

DC Direct 

current 

ºF Degrees 

Fahrenheit 

ºC Degrees 

Centigrade 

Hz Frequency 
F  

Farad (Capacitance) 

% Duty 

Cycle 

AUTO Autoranging 
HOLD Display 

hold 

SCAN  IR temperature and laser active 
 
 

1

2

3

4

5

6

7

8
9
10

11

12

Summary of Contents for EX230

Page 1: ...User s Guide Multimeter with IR Thermometer Extech EX230 ...

Page 2: ...ifies 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 PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipm...

Page 3: ...esistance 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 must not be use...

Page 4: ... 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 disco...

Page 5: ...stand test lead holders and battery compartment are on rear of unit Symbols and Enunciators Continuity Diode test n nano 10 9 amps cap µ micro 10 6 amps cap m milli 10 3 volts amps cap A Amps k kilo 10 3 ohms Hz M mega 10 6 ohms Hz Ω Ohms V Volts AC Alternating current DC Direct current ºF Degrees Fahrenheit ºC Degrees Centigrade Hz Frequency F Farad Capacitance Duty Cycle AUTO Autoranging HOLD Di...

Page 6: ...t the red test lead banana plug into the positive V jack 4 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 5 Read the voltage in the display AC DC CURRENT MEASUREMENTS 1 Insert the black test lead banana plug into the negative COM jack 2 Press the MODE button to indicate DC or AC on the display 3 For current measur...

Page 7: ...er to the unit under test and discharge all capacitors before taking measurements Remove the batteries and unplug the line cords 1 Rotate the function switch to the CAP position 2 Press the MODE button to indicate F units the display 3 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive CAP jack 4 Touch the test probe tips across...

Page 8: ...cate on the display 3 Insert the black lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive jack 4 Touch the test probe tips to the circuit or wire you wish to check 5 If the resistance is less than the continuity threshold the audible signal will sound DIODE TEST 1 Rotate the function switch to the green position 2 Press the MODE button to indicate an...

Page 9: ...ING Do not directly view or direct the laser pointer at an eye Low power visible lasers do not normally present a hazard but may present some potential for hazard if viewed directly for extended periods of time IR Spot to Distance Diagram The 4 1 spot to distance ratio determines the size of the measured surface area with respect to the distance the meter is held away from the surface IR Measureme...

Page 10: ...it manual ranging Note Manual ranging does not apply to the Temperature Diode and Continuity functions DISPLAY BACKLIGHT Press and hold the IRT HOLD button for 2 seconds to turn the backlight on The backlight will automatically turn off after approximately 10 seconds or press and hold the button again for 2 seconds to manually turn it off HOLD The HOLD function freezes the reading in the display P...

Page 11: ...ould be removed to prevent damage to the unit BATTERY and FUSE Replacement WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the battery cover 1 Turn power off and disconnect the test leads from the meter 2 Open the rear battery fuse compartment by removing the Phillips head screw on the lower rear of the meter 3 Pull down on the cover to release ...

Page 12: ... 600V 1V Note All AC voltage ranges are specified from 5 of range to 100 of range DC Current 400 μA 0 1 μA 1 5 reading 5 digits 4000 μA 1 μA 40 mA 0 01 mA 400 mA 0 1 mA 4 000 0 001 A 2 5 reading 5 digits 10 A 0 01 A Note 10A for 30 sec max AC Current 400 μA 0 1 μA 1 5 rdg 5 digits 4000 μA 1 μA 40 mA 0 01 mA 400 mA 0 1 mA 4 000 0 001 A 3 0 reading 5 digits 10 A 0 01 A Note 10A for 30 sec max NOTE A...

Page 13: ... 0 Hz 0 1 Hz 5 000 kHz 1 Hz 50 00 kHz 10 Hz 500 0 kHz 100Hz 5 000 MHz 1kHz 1 2 reading 4 digits 10 00 MHz 10kH Notes Sensitivity 0 5V rms 1MHz 3V rms 1MHZ Input protection 600V dc or ac rms Duty Cycle 0 1 to 99 9 0 1 1 2 reading 2 digits Notes Pulse width 100 µS 100ms Frequency 5Hz to150kHz Sensitivity 0 5V rms Overload protect 600V dc or ac rms Temperature 4 to 1400 F 0 1 F 3 0 reading 9 F 20 to ...

Page 14: ...te 2 times per second nominal Battery One 9 volt NEDA 1604 battery Fuses mA µA ranges 500mA 250V ceramic fast blow A range 10A 600V ceramic fast blow Operating Temperature 10ºC to 40ºC 14ºF to 122ºF Storage Temperature 10 o C to 60 o C 14 o F to 140 o F Operating Humidity Max 80 up to 31ºC 87ºF decreasing linearly to 50 at 40ºC 104ºF Storage Humidity 80 Operating Altitude 2000 meters 7000 ft maxim...

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