Equus 3320 User Manual
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Title Page No.
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SAFETY PRECAUTIONS/WARNINGS . . . . . . . . . . . . . . . . .1
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
CONTROLS AND INDICATORS . . . . . . . . . . . . . . . . . . . . . .6
TESTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . .7
BATTERY AND FUSE REPLACEMENT . . . . . . . . . . . . . . .11
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
SERVICE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . .12
INTRODUCTION
•
Congratulations.You have purchased a precision instrument
manufactured to the highest quality standards. This Digital
Multimeter is a general-purpose instrument designed for use
in general electronics, home electrical applications, and automotive electrical/electronic systems.
•
This meter is designed to test or measure AC voltage, DC
voltage, batteries, DC current, AC current, resistance , diodes
and continuity.
•
Please take the time to read these operating instructions thoroughly and completely .Failure to f ollow these instructions ma y
result in electrical shock, instrument damage and/or damage
to the equipment under test. Always use extreme caution
when working on or around electrically operated equipment.
SAFETY PRECAUTIONS/ WARNINGS
Do not operate this multimeter before reading this manual in its
entirety.The following guidelines must be followed to avoid accidents that can result in electric shock or personal injury.
•
Pay close attention to WARNINGS stamped on the front
and rear of the meter's case.These warnings, as well as all
warnings and precautions used through out this manual, must
be followed to avoid electric shock and/or personal injury.
•
The RESPONSIBLE PARTY shall be made aware that, if the
equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
•
Before using any of the functions on this meter, verify its
proper operation on a known similar function source where
the unit value is also known.Take corrective action based on
the indicated results.
To prevent electrical shock and/or damage to the tester or the
equipment under test, observe the following safety precautions:
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DO NOT apply more than the rated voltage, as marked on
the meter, between terminals or between any terminal and
earth ground.
•
Use caution when working above 30V AC rms, 42 V peak, or
60 V DC.Such voltages pose a shock hazard.
•
To avoid false readings that could lead to possible electric
shock or personal injury , replace the batteries as soon as the
low battery indicator displays.
•
Always inspect the multimeter, test leads and any other
accessories for damage prior to every use. If any damage is
found, do not use tester until repairs are done.
•
Always consider electrical and electronic equipment to be energized (live).Never assume any equipment is de-energized.
•
Never ground yourself when taking electrical measurements.
Isolate yourself from ground by using dry rubber insulating
mats to cover all exposed/grounded metal. Stand on rubber
mats and wear dry clothing.
•
Never take resistance measurements on energized (live)
electrical or electronic equipment.
•
Use one hand, instead of two, whenever possible to take
measurements.If two hands must be used, use extreme caution not to contact any energized conductors with your hands.
Be certain test leads are dry and clean.
•
Do not hold the instrument when taking measurements. Place
the instrument on a clean, insulating surface prior to taking
any measurement.
•
Don't become part of the circuit. Think safety.Act safely.
If working on a vehicle, take the following added precautions:
•
Only work on vehicle in a well ventilated area.
•
Always wear safety eye protection.
•
Avoid moving fan blades or any potentially moving parts.
•
Avoid hot engine parts.
•
Put transmission in "park" (automatic transmission vehicles) or
"neutral" (manual transmission vehicles).Set the parking brake.
•
Turn the ignition "off" before connecting or disconnecting any
testing equipment.
•
Put blocks on drive wheels.
•
Avoid wearing loose clothing or jewelry when working on a
vehicle.
•
Read your vehicle's service manual and follow it's safety procedures.
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SPECIFICATIONS
GENERAL SPECIFICATIONS AND FEATURES
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3-½ digit LCD display (maximum reading of 2000); 3 LEDs;
green, yellow and red
•
Auto Range (ACV, DCV, Ohm, AC mA, and DC mA)
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Automatic negative (-) polarity indication
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Automatic zero adjustment
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Over range indicator (except 10 A function).Displays "OL" on
LCD
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Low battery indicator.Displays battery symbol on LCD
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Automatic power shut off (after 15 idle minutes)
•
Pollution Degree 2
•
Measuring circuit category II
•
Operating environment:
Temperature - 32° to 104° F. (0° C to 40° C)
Humidity - Less than 80% relative humidity (non-condensing)
Altitude - up to 6562 ft (2000 meters)
•
Storage environment:
Temperature - 4° to 140° F (- 20° to 60° C)
Humidity - Less than 90% relative humidity (non-condensing)
•
Power Supply:Two 1.5V AA batteries
•
Fuse: 315mA/250V 5X20 mm (Radio Shack, GMA/217
series; #270-1046) fuse
•
Dimensions:
Height - 5.50 in. (139 mm)
Width - 3.50 in. (89 mm)
Depth - 1.25 in. (32 mm)
•
Weight (including batteries): approximately 6.3 oz (180 g)
ELECTRICAL SPECIFICATIONS
DC VOLTS
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Range Resolution Accuracy Notes
200.0mV 0.1mV
2000V 1mV
±(0.8% of Input Resistance:10MΩ
20.00V 10mV reading Overload Protection:
600V DC
200.0V 100mV
+ 5 digits) or AC 600V RMS.
600V 1V
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AC VOLTS
RESISTANCE (OHMS)
DC AMPS
AC AMPS
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Range Resolution Accuracy Notes
20.00mA 10µA
±(1.0% of Overload Protection:Fuse
reading 315mA/250V
200.0mA 100µA
+ 5 digits) Input Voltage Drop: <0.2V.
2.000A 1mA
±(2.0% of Unfused; 15sec maximum
reading Input Voltage Drop: <0.2V.
*10.00A 10mA
+ 5 digits)
*A waiting period of at least 15 minutes is necessary between
every 15 second testing period.
Range Resolution Accuracy Notes
20.00mA 10µA ±(1.5% of Overload Protection: Fuse
200.0mA 100µA reading 315mA/250V
+ 5 digits) Input Voltage Drop: <
0.2V.
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Range Resolution Accuracy Notes
2.000V 1mV
±(1.2% of
Input Resistance: 10MΩ
20.00V 10mV
reading
Overload Protection: 600V DC
200.0V 100mV
+ 5 digits)
or AC 600V RMS.
600V 1V
Frequency Response:
50Hz - 400Hz
Range Resolution Accuracy Notes
200.0Ω 100mΩ
2000kΩ 1Ω
±(1.0% of
20.00kΩ 10Ω
reading
Overload Protection: 250V DC
200.0kΩ 100Ω
+ 5 digits)
or AC RMS.
2.000MΩ 1kΩ
20.00MΩ 10kΩ ±(2.0% of
reading
+ 5 digits)
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