MTP MTP-1020 Istruzioni per il montaggio
AUTO RANGING
POCKET-SIZED
DIGITAL MULTIMETER
OPERATOR’S
INSTRUCTION MANUAL
SAFETY INFORMATION
This meter has been designed according to IEC-1010 concerning
Electronic measuring instruments with an overvoltage category (CAT II) and
pollution2.
Follow all safety and operating instructions to ensure the meter is used
Safely and is kept in good condition.
With proper use and care, your digital multimeter will give you years of
satisfactory service.
DURING USE
•Never exceed the protection limit indicated in the specifications for
each range of measurement.
•Never use the meter to measure voltages that might exceed 600V above
earth ground in category installations.
•Always be careful when working with voltages above 60V dc or 30V ac
rms. keep fingers behind the probe barriers while measuring.
•Do not perform resistance measurements on live circuits.
•Inspect test leads and probes for cracks, breaks or crazes in the
insulation before using the meter.
SAFETY SYMBOLS
Important safety information, refer to the instruction manual.
Earth ground.
Indicates compliance with requirements for double insulation.
Fuse must be replaced with ratings specified in the manual.
MAINTENANCE
•Before opening case, always disconnect test beads from all energized
circuits.
•For continuous protection against fire, replace fuse only with ratings;
F 500mA/250V (QuickActing).
•Never use the meter unless the back cover is in place and fastened
completely.
•Do not use abrasives or solvents on the meter. To clean it uses only a
damp cloth and mild detergent.
GENERAL DESCRIPTION
This compact digital multimeter is designed to measure AC and DC
Voltages, AC and DC current, Resistance, Diode and to perform audible
Continuity checks with accuracy and ease.
Small and lightweight, with a carrying case and test leads wound on its
Body, this instrument will provide you years of satisfactory service.
Auto power-off function extends the battery life. If no key-inputs
happen around 30 minutes, this meter will be turned off automatically.
FRONT PANEL DESCRIPTION
1. Power Button
Momentary-type push switch for tuning meter ON or OFF.
2. D-H Button
Momentary-type push switch for data hold.
3. Function Switch
Rotary switch for selecting functions.
4. Test Leads
Red test lead for positive (+) and black test lead for negative (-)
5. LCD Display
3 digits, 7 segment, maximum 3999 counts
SPECIFICATION
Accuracy is guaranteed for 1 year,23 5,less than 75% RH.
DCVOLTAGE
Range Resolution Accuracy
4V 1mV ±0.5% of rdg ±2dgt
40V 10mV ±0.8% of rdg ±2dgt
400V 100mV ±0.8% of rdg ±2dgt
600V 1V ±0.8% of rdg ±2dgt
Overload Protection: 600V dc or rms ac for all ranges
Input Impedance: 10MΩ
AC VOLTAGE
Range Resolution Accuracy
4V 1mV ±0.8% of rdg ±0.5% of full scale ±3dgts
40V 10mV ±0.8% of rdg ±0.5% of full scale ±3dgts
400V 0.1mV ±0.8% of rdg ±0.5% of full scale ±3dgts
600V 1V ±0.8% of rdg ±0.5% of full scale ±3dgts
Overload protection: 600V dc or rms ac for all ranges
Input Impedance:10MΩ
Frequency range: 50Hz to 400Hz, 50 to 60Hz for 400V and 600V ranges
Response: Average responding, calibrated in rms of a sine wave
DC CURRENT
Range Resolution Accuracy
40mA 0.01mA ±2.0% of rdg ±2dgts
400mA 0.1mA ±2.0% of rdg ±2dgts
Overload Protection: F 500mA/250V fuse
AC CURRENT
Range Resolution Accuracy
40mA 0.01mA ±3.0% of rdg ±0.5% of full scale ±3dgts
400mA 0.1mA ±3.0% of rdg ±0.5% of full scale ±3dgts
Overload Protection: F 500mA/250V fuse.
RESISTANCE
Range Resolution Accuracy
400Ω 0.1Ω ±1.5% of rdg ±2dgts
4kΩ 1Ω ±1.5% of rdg ±2dgts
40kΩ 10Ω ±1.5% of rdg ±2dgts
400kΩ 0.1kΩ ±1.5% of rdg ±2dgts
4MΩ 1kΩ ±1.5% of rdg ±2dgts
40MΩ 10kΩ ±3.0% of rdg ±2dgts
Maximum Open Circuit Voltage: 0.65V
Overload Protection: 250V rms ac for all ranges
DIODE TEST
Range Description
Show the approx. forward voltage drop of the diode.
Overload Protection: 250V rms ac
AUDIBLE CONTINUITY TEST
Range Description
Built-in buzzer sounds when resistance is less than 50Ω.
Overload Protection: 250V rms ac
GENERAL CHARACTERISTICS
Maximum voltage between CATII 600V
Terminals and earth ground
Fuse Protection F 500mA/250V
Power supply 3V battery, SR44 or LR44 X 2
Display LCD,3999 counts, updates 2-3/sec.
Measuring method Dual-slope integration A/D converter
Overrange indication Figure”OL” on the display
Polarity indication “_”displayed for negative polarity
Operating temperature 0℃to 40℃ (32℉ to 104℉)
Storage temperature -10℃ to 50℃ (10℉ to 122℉)
Low battery indication appears on the display
Size 120X70X18mm
Weight Approx.110g including batteries
OPERATING INSTRUCTION
DC VOLTAGE MEASUREMENT
1. Set the function switch at V position.
2. Connect test leads across the source or load under
measurement. The Polarity of red lead connection will be
indicated at the same time as the Voltage value.
AC VOLTAGE MEASUREMENT
1. Set the function switch at V~ position.
2. Connect test leads across the source or load being measured
and read the voltage value on the LCD display.
DC CURRENT MEASUREMENT
1. Set the function switch at A position.
2. Open the circuit in which the current is to be measured ,and
connect Test leads in series with the circuit.
3. Read current value on the LCD display along with the polarity of
red lead connection.
AC CURRENT MEASUREMENT
1. Set the function switch at A~ position.
2. Open the circuit in which the current is to be measured ,and
connect Test leads in series with the circuit and read LCD
display.
RESISTANCE MEASUREMENT
1. Set the function switch at Ω position.(Note: The polarity of red
lead is positive”+”)
2. Connect test leads across the resistor to be measured and read
LCD display.
3. If the resistor being measured is connected to a circuit, turn off
power of the circuit and discharge all capacitors before applying
test leads.
4. When measuring resistance above 1MΩ,the meter will take a
few seconds to get stable reading .It is normal for high
resistance measurement.
DIODE TEST
1. Set the function switch at position.(Note: The polarity of red
lead is Positive”+”)
2. Connect the red test lead to the anode of the diode to be tested
and the Black lead to the cathode of the diode.
3. The approx. forward voltage drop of the diode will be
displayed .If the Connection is reversed; only figure “OL” will
appear on the LCD display.
AUDIBLE CONTINUITY TEST
1. Set the function switch at position.
2. Connect test leads to two points of the circuit to be tested. If the
Resistance is less than 50Ω,buzzer will sound.
DATA HOLD APPLICATION
D-H button is used to hold a measuring result. When this button
is Pushed, LCD will keep the last reading until pushing this button
again or rotating the function switch.
BATTERY&FUSE REPLACEMENT
If the sign appears on the LCD display, it indicates that the
battery should be replaced. Remove the screw on the back cover
and open the Case. Replace the exhausted batteries with same
types.
Fuse rarely need replacement and blow almost always as a
result of Operator’s error .Open the case and replace blown fuse
with same ratings.
WARNING
Before attempting to open the case, always be sure that test
leads have been disconnected from measurement circuit.Close
case and tighten Screws completely before using the meter to avoid
electrical shock hazard.
For protection against fire, replace fuse only with the specified
ratings;
F500mA 250V.
Accessories
Battery SR44 or LR44
Carrying Case
Operating manual
CAUTION:
“Using this appliance in an environment with a strong
radiated radio-frequency electromagnetic field (approximately
3V/m), may influence its measuring accuracy. The measuring result
can be strongly deviating from the actual value.”
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