background image

EX503-en-GB_ v5.4   12/15 

11

Maintenance 

WARNING

:  To avoid electric shock, disconnect the test leads from any source of voltage before 

removing the back cover or the battery or fuse covers. 

 

WARNING: 

To avoid electric shock, do not operate your meter until the battery and fuse covers are 

in place and fastened securely. 

This MultiMeter is designed to provide years of dependable service, if the following care instructions 
are performed: 

1. 

KEEP THE METER DRY

. If it gets wet, wipe it off. 

2. 

USE AND STORE THE METER IN NORMAL TEMPERATURES.

 Temperature extremes can 

shorten the life of the electronic parts and distort or melt plastic parts. 

3. 

HANDLE THE METER GENTLY AND CAREFULLY.

 Dropping it can damage the electronic parts 

or the case. 

4. 

KEEP THE METER CLEAN.

 Wipe the case occasionally with a damp cloth. DO NOT use 

chemicals, cleaning solvents, or detergents. 

5. 

USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE. 

Remove old or 

weak batteries so they do not leak and damage the unit. 

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 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 cover by removing two screws (B) using a Phillips head screwdriver. 
3. Insert the battery into battery holder, observing the correct polarity. 
4. Put the battery cover back in place. Secure with the screws. 

 

 

Never dispose of used batteries or rechargeable batteries in household waste. 
As consumers, users are legally required to take used batteries to appropriate 
collection sites, the retail store where the batteries were purchased, or wherever 
batteries are sold. 

Disposal: 

Do not dispose of this instrument in household waste. The user is obligated to take end-of-

life devices to a designated collection point for the disposal of electrical and electronic equipment.  
 

Other Battery Safety Reminders 

o

  Never dispose of batteries in a fire. Batteries may explode or leak.

 

o

  Never mix battery types. Always install new batteries of the same type.

 

 
 

 

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...

Reviews: