JEFDMM300V
300V
DIGITAL MULTIMETER
USER GUIDE
v.1.1
www.jeffersontools.com
Important:
Please read all information carefully
before use and keep these instructions in a safe
place for future reference.
EQUIPMENT OVERVIEW
This is a compact CAT III 300V rated multimeter for measuring DC and
AC voltage, DC current, resistance, continuity, diode and batteries. A
short summary of the features of this equipement is listed below:
•
CAT III 300V Digital Mulitmeter
•
3.5 Digit LCD Display (Maximum reading 1999)
•
Data Hold Function & Overload Protection
•
Low Battery Indication
•
Negative Polarity Indication
•
Continuity and Diode Testing
•
Battery Testing: 1.5V / 9V / 12V
•
Resistance Measurements: Up to 2000KΩ
•
Manufactured & tested to IEC 61010
SPECIFICATIONS
DC Voltage Range:
200m ~ 300V
DC Current Range:
2000μ ~ 10A
AC Voltage:
200 ~ 300V
Input Impedance:
1MΩ
Resistance:
200 ~ 2000kΩ
Continuity:
less than 30Ω
Diode Testing:
2.8V (approx)
Test Current:
1mA
Battery Testing
1.5V / 9V / 12V
Overload Protection:
Both Fuses: ø5x20mm
F1: Fuse, 250mA / 300V, Fast action
F2: Fuse, 10A / 300V, Fast action
Power Supply:
1x 9V Battery
Dimensions:
138 x 74 x 32mm
Weight:
160g (including battery)
ELECTRICAL SYMBOLS
This equipment should only be used by fully trained, qualified and
responsible personel. The following list of common electrical symbols
is provided for reference:
Alternating Current (AC)
Direct Current (DC)
Both Alternating and Direct Current AC/DC
Earth (ground) Terminal
Fuse
Double or reinforced insulation protection
Caution: Risk of electric shock
SAFETY
•
Always check this equipment before use. In particluar ensure that
you check the case and insulation surrounding the connectors. Inspect
the test leads for damaged insulation or exposed wiring. Replace the
test leads if any defects are identified .Do not use the equipment if any
damage or defect is found.
•
Do not operate the meter in environments where explosive gas, vapor
or dust is present.
•
You can test that the meter is functioning correctly by measuring a
known voltage before use.
•
Never exceed the rated voltage, as marked on the meter, between
terminals or between any terminal and earth ground.
•
When using the probes, ensure you keep your fingers behind the
finger guards.
•
Connect the common test lead before connecting the live test lead.
When disconnecting test leads always disconnect the live test lead
first.
•
Remove the test leads from the meter before opening a battery cover
or case.
•
Do not operate the meter with a battery cover that is removed or
loose.
•
Avoid touching conductors with hands or skin.
•
Never use the equipment in wet conditions or when hands or skin are
wet.
•
Do not use the equipment if any part of it or the test leads are wet.
•
Please note that where an input terminal is connected to dangerous
live potential, the potential can occur at all other terminals.
This equipment is suitable for use for CAT III rated measurements
only and should not be used on equipement that requires CAT IV.
Check compatibility before use.
•
Disconnect circuit power and discharge all capacitors before testing
resistance, diode, continuity or temperature (where applicable).
•
Always use the proper terminals, function and ranges specified for
your equipment. Contact Jefferson Tools for advise if you are unsure
about any aspect of the functionality of this equipment.
•
When measuring current always turn off the circuit power before
connecting the meter. Remember to place the meter in series with the
circuit.
•
Always take precautions when working with voltages exceeding 30V
AC RMS, 42V Peak or 60V DC.
•
Always disconnect the test leads before rotating the range switch to
change functions.
Important:
Always replace the battery as soon as the
low battery indicator appears on the display. Never
use the equipment on low battery.
