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EX503-en-GB_ v5.4   12/15 

13

Specifications 

Function Range Resolution 

 

Accuracy 

DC Voltage 
 

400mV 0.1mV 

(0.5% r 2 digits) 

4V 0.001V 

(1.2% r 2 digits) 

40V 0.01V 
400V 0.1V 
1000V 1V 

(1.5% r 2 digits) 

AC Voltage 

400mV 

0.1mV 

(2.0% r 10 dgts) 

4V 0.001V 

(2.0% r 5 dgts) 

40V 0.01V 
400V 0.1V 
1000V 1V 

(2.5% r 5 dgts) 

DC Current 

400

A 0.1

(1.0% r 3 digits) 

4000

A 1

(1.5% r 3 digits) 

40mA 0.01mA 
400mA 0.1mA 
10A 0.01A 

(2.5% r 10 digits) 

AC Current 

400

A 0.1

(2.5% r 10 digits) 

4000

A 1

(1.8% r 5 digits) 

40mA 0.01mA 
400mA 0.1mA 
10A 0.01A 

(3.0% r 7 digits) 

Resistance 

400

 0.1

 

(1.2% r 4 digits) 

4k

 0.001k

 

(1.0% r 2 digits) 

40k

 0.01k

 

(1.2% r 2 digits) 

400k

 0.1k

 

4M

 0.001M

 

40M

 0.01M

 

(2.0% r 3 digits) 

Capacitance 40nF 

0.01nF 

(5.0% r 7 digits) 

400nF 0.1nF 

(3.0% r 5 digits) 

4

F 0.001

40

F 0.01

100

F 0.1

(5% r 5 digits) 

Frequency 
Hz% Function 

5.999Hz 0.001Hz 

(1.5% r 1 digits) 

59.99Hz 0.01Hz 
599.9Hz 0.1Hz 

(1.2% r 3 digits) 

5.999kHz 0.001kHz 
59.99kHz 0.01kHz 
599.9kHz 0.1kHz 
5.999MHz 0.001MHz 

(1.5% r 4 digits) 

9.999MHz 0.001MHz 
Sensitivity: 0.5V rms <500kHz;  3V rms >500kHz 

Duty Cycle 

0.1 to 99.9% 

 

Pulse width: 100µs to 100ms, Frequency: 5Hz to 150kHz 

NOTE:

 Accuracy is stated at 18

o

C to 28

o

C (65

o

F to 83

o

F) and less than 75% RH. 

Note:

 Accuracy specifications 

consist of two elements: 

 (% reading) – This is the accuracy of the measurement circuit. 

Summary of Contents for EX503

Page 1: ...User s Guide Autoranging Multimeter Extech EX503...

Page 2: ...tifies 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 term...

Page 3: ...ks 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 li...

Page 4: ...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 resistan...

Page 5: ...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 9 capacitance micro 10 6 amps m milli...

Page 6: ...e in the display AC VOLTAGE FREQUENCY DUTY CYCLE MEASUREMENTS WARNING Risk of Electrocution The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances beca...

Page 7: ...AC CURRENT FREQUENCY DUTY CYCLE MEASUREMENTS CAUTION Do not make 20A current measurements for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert...

Page 8: ...ure continuity on circuits or wires that have voltage on them 1 Set the function switch to the CAP position 2 Insert the black lead banana plug into the negative COM jack Insert the red test lead bana...

Page 9: ...lue in the display FREQUENCY DUTY CYCLE MEASUREMENTS ELECTRONIC 1 Set the rotary function switch to the Hz position 2 Press the Hz button to indicate Hz in the display 3 Insert the black lead banana p...

Page 10: ...can be stored and measurements made in comparison to that value The displayed value is the difference between the reference value and the measured value 1 Perform the measurement as described in the o...

Page 11: ...6 IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME the batteries should be removed to prevent damage to the unit BATTERY INSTALLATION WARNING To avoid electric shock disconnect the test leads fr...

Page 12: ...ore removing the fuse cover 1 Disconnect the test leads from the meter 2 Remove the battery cover two B screws and the battery 3 Remove the six A screws securing the rear cover 4 Gently remove the old...

Page 13: ...e 400 0 1 1 2 reading 4 digits 4k 0 001k 1 0 reading 2 digits 40k 0 01k 1 2 reading 2 digits 400k 0 1k 4M 0 001M 40M 0 01M 2 0 reading 3 digits Capacitance 40nF 0 01nF 5 0 reading 7 digits 400nF 0 1nF...

Page 14: ...04 battery Fuses mA A ranges 0 5A 1000V ceramic fast blow A range 10A 1000V ceramic fast blow Operating Temperature 5 C to 40 C 41 F to 104 F Storage Temperature 20 C to 60 C 4 F to 140 F Operating Hu...

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