Introduction Congratulations on your purchase of the Extech EX310 MultiMeter. The EX310 offers AC/DC Voltage, AC/DC Current, Resistance, Diode, and Continuity testing plus a built-in non-contact Voltage Detector. Proper use and care of this meter will provide many years of reliable service.
EX310 CAT II - 600V MultiMeter V/ /mA Symbols •))) Continuity Diode Battery status milli (10 ) (volts, amps) kilo (10 ) (ohms) Volts Amps Ω Ohms Alternating current Direct current Model EX310 - Version 7.1 – 05/2006...
NON-CONTACT AC VOLTAGE DETECTOR The EX310 can detect the presence of AC voltage (from 100 to 600VAC) simply by being held very near to a voltage source. WARNING: Test the AC voltage detector on a known live circuit before each use.
Touch the red test probe tip to the positive side of the circuit. Read the voltage in the display. Move the function switch to successively lower VDC positions to obtain a higher resolution reading. Model EX310 - Version 7.1 – 05/2006...
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. Apply power to the circuit. Read the current in the display. Model EX310 - Version 7.1 – 05/2006...
Touch the test probe tips to the circuit or wire you wish to check. If the resistance is less than approximately 100Ω, the audible signal will sound. If the circuit is open, the display will indicate “1___”. Model EX310 - Version 7.1 – 05/2006...
“1___” for the reverse test. A shorted diode will indicate the same value of resistance in both the reverse and forward test directions. An open diode will indicate “1___” in both test directions. Model EX310 - Version 7.1 – 05/2006...
Remove old or weak batteries so they do not leak and damage the unit. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME, the battery should be removed to prevent damage to the unit. Model EX310 - Version 7.1 – 05/2006...
6. Secure the fuse/battery compartment cover using the Phillips head screw. 7. Place the protective rubber holster on the meter. 1. Removable Rubber Holster 2. Meter 3. Battery 4. Fuses 5. Compartment Cover 6. Rubber Holster Model EX310 - Version 7.1 – 05/2006...
Secure the fuse/battery compartment cover. Place the protective rubber holster on the meter. WARNING: To avoid electric shock, do not operate your meter until the fuse cover is in place and fastened securely. Model EX310 - Version 7.1 – 05/2006...
• (+ digits) – This is the accuracy of the analog to digital converter. Accuracy is stated at 65 F to 83 F (18 C to 28 C) and less than 75% RH. Model EX310 - Version 7.1 – 05/2006...
OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. Note – Examples include electricity meters and primary over-current protection equipment Warranty Model EX310 - Version 7.1 – 05/2006...
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext.
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