NTLO P3245-1T User manual

5.8 Continuity Test
1. Turn off all power of the circuit under test. Discharge all capacitors of circuit. Any voltage present during the conti-
nuity test will result in reading error and can damage the instrument if the voltage exceed overload protection limit. Set
the rotary switch to the continuity test range position and press the SEL button to
select the function.
2. Connect the red test lead to the VAHzCxTemp input terminal and the black test lead to the
COM input terminal.
3. Connect the test leads to the circuit or device under test. Make sure that the power of circuit or device is turned off.
4. The open circuit will be indicated as overrange condition.
5. The buzzer will sound if the resistance of the circuit is less than approximately 50. After complete all tests, dis-
connect the test leads from circuit and instrument.
5.9 Data Hold
The reading will be hold when the HOLD key is pressed. If the key is pressed once again, it will release the hold and
allow a further measurement.
6. MAINTENANCE
WARNING
To avoid electric shock, remove the test leads from the circuit before opening the multimeter.
1. Repairs and services not covered by this instruction manual must be done only by qualified technician.
2. Periodically wipe the housing with a damp soft cloth and mild detergent. Do not use abrasives or solvents.
6.1 Battery Replacement
To replace the battery, follow the procedure listed below.
1. Disconnect the test leads from the circuit under test and turn off the meter.
2. Disconnect the test leads from the meter.
3. Place the meter with front panel over a soft surface.
4. Remove the screws located in the rear case.
5. Carefully separate the front case from the rear case.
6. Carefully remove the old batteries replacing for a new one.
7. Replace front case in the rear case.
8. Refasten the screws.
6.2 Fuse Replacement
Refer to the following procedure to analyze or replace the fuse.
1. Repeat the step 1 to 5 of item Battery Replacement.
2. Remove the damaged fuse.
3. Install the new fuse, with the same size and specification.
4. Replace the front case in the rear case.
5. Refasten the screws.
7. ACCESSORIES
After receiving your instrument, please check if the listed accessories are included in the giftbox:
1. Digital Multimeter
2. Test Leads (one pair)
3. Instruction Manual
4. Batteries (installed)
5. Holster
6. K Type Thermocouple
Fruhmann GmbH
NTL Manufacturer & Wholesaler
Austria www.ntl.at
P3245-1T
Hand multimeter digital, small
auto range
It is a portable test instrument,
compact and operated by battery. It
has the following measurement
features for domestic, hobby and
educational applications.
- DC and AC Voltage
- DC and AC Current
- Resistance
- Capacitance
- Frequency
- Temperature
- Diode and Continuity Test
- Data Hold
- Autorange

1. SAFETY INFORMATION
This manual contains information and warnings that must be followed for operating the meter safely and maintaining
the meter in a safe operating condition. In the case of any doubt regarding the integrity of the instrument, make the
multimeter unusable immediately.
The protection provided by the meter may be impaired if, for example:
- It shows visible damages.
- It fails in the execution of measurements.
- It was stored for a long time in unfavorable conditions.
- It was be submitted the severe vibrations in transport.
WARNING
1. To avoid electric shock or damages to the instrument, do not apply voltages above 600V DC or AC RMS between
input terminals of the instrument.
2. Observe the proper safety precautions when working with voltages above 60V DC or 30V AC RMS. Such voltages
can expose the user to dangerous electric shocks.
3. Make sure that the test leads are in good conditions of security.
CAUTION
To avoid damages to the instrument:
- Remove the test leads from test circuit before changing the measurement function.
- Never connect voltages above 600V DC or 600V AC RMS.
- Never connect voltage to the input terminals when the rotary switch is selected to measure resistance.
- Maximum input voltage in the temperature function: 60V DC or 24V RMS AC.
Use of the Proper Fuse
To avoid dangerous fires, use the correct fuse, of the same type and specification of operation current and voltage, as
specified. The use of the fuse with different specification or short-circuit the fuse socket is prohibit and can cause
extremely serious injury.
2. SPECIFICATION
2.1 General Specification
- Display: 3 ¾ Digits (4000 Counts). - Overrange Indication: OL.
- Sample Rate: 3 times / second. - Auto Power Off: 15 minutes. - Auto Range.
- Data Hold Function.
- Low Battery Indication: Display shows .
- Operation Environment: 0°C to 40°C, RH < 75%.
- Storage Environment: -20°C to 60°C, RH < 80%.
- Internal Use.
- Certification: CE Mark - CAT II 600V. - Power: Two 1.5V AAA battery.
- Dimensions: 138(H) x 72(W) x 38(D)mm. - Weight: Approx. 205g (including battery).
2.2 Electrical Specification
Accuracy specified to one year calibration period, operation temperature of 18°C to 28°C (64°F to 82°F) and relative
humidity < 70%.
DC Voltage
RANGE RESOLUTION ACCURACY
400mV 100V ±(0.5%+4D)
4V 1 mV
40V 10mV ±(0.8%+4D)
400V 100mV
600V 1V
- Input Impedance: 10M.
- Overload Protection: 600V DC / 600V AC RMS.
AC Voltage
ACCURACY
RANGE RESOLUTION 50Hz/60Hz 40 ~ 400Hz
4V 1 mV ±(0.8%+4D)
40V 10mV
±(2%+5D)
400V 100mV ±(1.2%+5D)
600V 1V
- Frequency Response: 40 to 400Hz. - Input Impedance: 10M.
- Overload Protection: 600V DC / 600V AC RMS.
DC Current
RANGE RESOLUTION ACCURACY
400µA 0.1µA ±(1.2%+4D)
4000µA 1µA
40mA 10µA
200mA 100µA
10A 10mA ±(2.5%+4D)
- Overload Protection: Fast Action Fuse 0.25A/250V to mA input. Without fuse to 10A input (10A maximum for 15s).
AC Current
RANGE RESOLUTION ACCURACY
400µA 0.1µA ± (1.5% +5D)
4000µA 1µA
40mA 10µA
200 mA 100A
10A 10mA ±(3% +5D)
- Frequency response: 40 to 400Hz
- Overload Protection: Fast Action Fuse 0.25A/250V to mA input. Without fuse to 10A input (10A maximum for 15s).
Temperature
- Range: -20°C ~ +750°C / -4°F ~ +1400°F.
- Resolution: 1°C / 1°F.
- Accuracy:
-20°C ~ +400°C / -4°F ~ +750°F ±(1%+4D)
+400°C ~ +750°C / +750°F ~ +1400°F ±(3%+10D)
- Thermocouple measuring range: -40°C ~ +204°C
- Thermocouple Accuracy: ±0.75% or ±2.2°C
Resistance
RANGE ACCURACY
400 ±(1.2%+4D)
4k
40k
400k
4M
20M ±(3%+5D)
- Overload Protection: 500V DC / 500V AC RMS.
Frequency
RANGE RESOLUTION ACCURACY
10Hz 0.01 Hz
100Hz 0.1Hz
1kHz 1Hz
10kHz 10Hz ±(1%+4D) (10Hz ~ 1 MHz)
100kHz 100Hz
1 MHz 1 kHz
5MHz 10kHz
- Sensitivity: 1V AC RMS.
- Maximum Input Voltage: 250V AC RMS, 50 ~ 60Hz 5V AC RMS, 10 ~ 1MHz
Capacitance
RANGE RESOLUTION ACCURACY
4nF 0.001 nF ±(3%+10D)
40nF 0.01nF
400nF 0.1nF
4µF 0.001µF
40µF 0.01µF
100µF 0.1µF
Diode Continuity
- Indication: Approximate Diode Forward Voltage. - Indication: Buzzer.
- Resolution: 0.001V DC. - Threshold: A sound signal is emitted, when the
- Test Voltage: 1.5V DC (maximum). measured resistance is under approx 50
- Test Current: ±0.6mA.

4. FRONT PANEL DESCRIPTION
Refer to Figure 1 to identify controls and terminals.
Figure 1
1. Display: Shows the reading value.
2. Rotary Switch: Turns ON and OFF the instrument and select the function and the measurement range.
3. Input Terminals: Terminals to connect the test leads.
COM - Common terminal, to connect the black test lead, used in all functions.
VAHzCxTemp - Positive terminal, to connect the red test lead, used in AC and DC voltage, DC and AC
current until 200mA, resistance, capacitance, frequency and temperature measurement and diode and
continuity test.
10A - Positive terminal, to connect the red test lead, used to measure AC and DC current between 200mA
and 10A.
5. OPERATION
WARNING
Read and understand completely this instruction manual before using the instrument.
Error in operation or in discordance with the warnings and instructions of this manual, can result in material damages
and serious or deadly injuries.
Preparation and Caution Before Measurement
1. Wait at least 30 seconds after power on the instrument before making measurements.
2. The rotary switch must be positioned in the proper measurement function before connecting the test leads to the
device to be tested. Make sure to disconnect the test leads from test points before changing the rotary switch to a new
function or range.
3. If the multimeter is used next to equipment that generates electromagnetic interference, the display can become
unstable or present incorrect values.
4. Do not allow that the instrument enters in contact with water or any another liquid.
5.1 AC / DC Voltage Measurement
WARNING
Do not apply more than 600V DC or AC RMS between the VAHzCxTemp and COM input terminals. Exceed these
limits can result in dangerous electric shock and damage to the instrument.
Take care to avoid contact with the circuit under test, when working with high voltage.
1. Connect the red test lead to the VAHzCxTemp input terminal and the black test lead to the COM input terminal.
2. Set the rotary switch to V position, and press the SEL button to select AC () or DC ().
3. Connect the test leads to the circuit under test. The polarity to DC voltage is automatically displayed. When the
input voltage exceed the range limit, the display will show (OL).
4. Read the measurement in the display.
5.2 AC / DC Current Measurement
1. Connect the red test lead to the VAHzCxTemp input terminal and the black test lead to the COM input terminal to
measure current up to 200mA. To measure current between 200mA and 10A, connect the red test lead to the 10A
input terminal. The maximum measurement time for 10A is 15 seconds.
2. Set the rotary switch to desired current range position (µA for measurements until 4000µA, mA for measurements
until 200mA and 10A, for measurements until 10A).
3. Press the SEL button to select () or DC ().
4. Turn off all power from the circuit under test, and discharge all capacitors before opening the circuit to connect the
multimeter in series with the circuit.
5. Connect the test leads and turn on the power. Make the display reading. The polarity to DC current is automatically
displayed.
5.3 Resistance Measurement
1. Connect the red test lead to the VAHzCxTemp input terminal and the black test lead to the COM input terminal.
2. Set the rotary switch to resistance range position.
To avoid possible damage to the meter or to the equipment under test, disconnect the circuit power and discharge all
high-voltage capacitors before measuring resistance.
3. Connect the test leads to the circuit under test and make the resistance reading in the display.
NOTE: If the measured resistance exceed the maximum value for the range, the display will show (OL) and will select
the next range. To measure resistance around 1 Mor bigger, the instrument can take some seconds to stabilize the
reading. It is normal to high resistance readings.
5.4 Frequency Measurement
1. Set the rotary switch to frequency position (Hz).
2. Connect the red test lead to the VAHzCxTemp input terminal and the black test lead to the COM input terminal.
3. Connect the test leads to the points to be measured and make the frequency reading in the display.
WARNING
To avoid possible damage to the meter or to the equipment under test, never exceed the measurement limit.
5.5 Capacitance Measurement
WARNING
To avoid possible damage to the meter or to the equipment under test, disconnect the circuit power and make sure all
capacitors are discharged.
1. Set the rotary switch to capacitance position.
2. Connect the red test lead to the VAHzCxTemp input terminal and the black test lead to the COM input terminal.
3. Verify the polarity when necessary and connect the test leads to the capacitor terminals.
4. Read the capacitance measurement in the display.
NOTE: Before connect the capacitor, the display may show some reading different from zero, however, this reading
must be discarded, because the correct reading will superpose the wrong reading when the capacitor is connected.
5.6 Temperature Measurement
1. Set the rotary switch to °C or °F position.
2. Insert the red test lead of K type thermocouple in VAHzCxTemp input terminal and the black test lead in
COM terminal.
3. Touch the end of temperature sensor to the area or surface of the object to be measured.
4. Make the display reading.
NOTE: The meter must be keep away from source of very high temperature.
Maximum input voltage in the themperature function: 60V DC or 24V RMS AC.
5.7 Diode Test
1. Connect the red test lead to the VAHzCxTemp input terminal and the black test lead to the COM input terminal.
2. Set the rotary switch to diode position and press the SEL button to select the function.
3. Connect the test leads to the diode. Normally, the forward voltage of a silicon diode is between 0.4V and 0.9V. If the
diode is damaged, the display will show 000 (short-circuit condition) or OL (open condition).
4. Invert the connection of test leads. If the diode is good, OL must be displayed. If it is damaged,
(shortcircuit or resistive), 000 or a near value will be displayed.
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