protech QM1571 Manuel utilisateur
IP67 TRUE
RMS
4000
DISPLAY
COUNT
CAT IV
600V
Wireless
Datalogging
Digital Multimeter
SPECIALIST
LIFETIME
WARRANTY
Wireless
Data Logging
Digital Multimeter User Manual
QM1571
Thank you for purchasing this Wireless Data Logging Digital Multimeter. The
wireless communication function of this multimeter allows you to transmit
data wirelessly from the multimeter to your PC. This allows accurate recording
at a much faster and detailed rate than manually writing down numbers.
The true RMS function ensures accurate readings, regardless of load type or
current wave shape. Packed with plenty of features, this multimeter will be
your constant companion on-site, given its tough double moulded body and
IP67 rating.
Please familiarise yourself with the functions of the multimeter before use.
We recommend retaining this manual for ease of reference.
• Improper use of this meter can cause damage, shock, injury or death.
• Always remove the test leads before replacing the battery or fuses.
• Before using the meter, please inspect the condition of the test leads and
the meter itself for any damage. If damage is present, please discontinue
use.
• Do not measure voltage if the voltage on the terminals exceeds 1000V above
earth ground.
• Use great care if voltages are greater than 30VAC RMS. Anything above this
is considered a shock hazard.
• Always discharge capacitors and disconnect power before performing diode,
resistance or continuity tests.
• Do not exceed the maximum limits of the input values shown in the
specication tables on pages 12, 13, 14, 15 & 16 of this manual.
• Remove the batteries from the meter if it will be unused for an extended
period of time.
• Always turn the function switch to the off position when not in use.
2
FUNCTIONS
Max. Display 4000 count
Basic Accuracy 0.5%
DC Voltage Range 400mV - 1000V
AC Voltage Range 4V - 1000V
DC Current Range 4mA -10A
AC Current Range 4mA - 10A
Resistance 400Ω - 40MΩ
Capacitance (CAP) 4nF - 100µF
Frequency (Hz) Up to 10MHz
Temperature Yes
Data Hold Yes
Relative Measurement Yes
Diode Test Yes
Duty Cycle Yes
Audible Continuity Yes
LCD Backlight Yes
Wireless USB Yes
The tilt stand & battery compartment are at the rear of the multimeter.
LCD Screen
Range Button
Relative
Button
Mode Button
Hz% Button
Function
Switch
COM Input Jack
Hold &
Flashlight Button
USB Button
Positive mA, μA
Input Jack
Positive mA, μA
Input Jack
10A Input Jack
4
FUNCTIONS
Autoranging/
Manual
• The meter’s default setting is autoranging. This
automatically selects the best range for the selected
test/measurement.
• To set the meter to manual, press the “RANGE”
button. The AUTO icon on the screen will turn off.
• Press the “RANGE” button to move through the
available ranges until you see the range you want.
• To exit the manual mode and return to
autoranging, press and hold the “RANGE” button
for 2 seconds.
• Manual ranging cannot be selected for capacitance
and frequency measurements.
Mode • The “MODE” button helps you to move through
various operations with various icons displayed on
screen.
• It works in conjunction with the function switch to
measure things like resistance, diode, continuity and
capacitance.
• It also allows you to select between AC or DC
current measurements.
Function
Switch
• Select a measurement range by turning the switch
to the preferred option.
LCD Screen • Readings and measurements taken by the
multimeter will display in this area.
Hold &
Backlight
• Press the “HOLD” button to lock readings as
displayed on the screen. Press again to unlock.
• Press the “HOLD” button longer to turn the
backlight on. Press the button longer again to turn
the backlight off.
Relative
Button
• Press the “REL” button to store a reading for
referencing at a later date. Then reference any new
inputs against the stored measurement.
• Press the “REL” button again to cancel the relative
measurement function.
• Not to be used for Hz/duty, diode and continuity
measurements.
5
Hz% Button • For use with frequency and duty cycle
measurements.
• Press the button to select either frequency or duty
cycle.
USB Button • To use the wireless communication, rst install the
software onto your computer. The software disc is
located in the box of this multimeter.
• To activate wireless mode, press the USB button on
the multimeter. The RF icon should appear on the
screen.
• When communication between your computer and
the multimeter is established, the LED indicator on
the multimeter will ash.
• The multimeter will transmit measurements to the
computer every second, which will be plotted and
inserted into a chart.
• Press the USB button again to exit wireless transmit
mode.
Input Jacks • VΩCAP: Positive input terminal for voltage
resistance, diode, temperature, frequency and
capacitance.
• COM: Negative input terminal for voltage,
resistance, diode, temperature, frequency and
capacitance.
• µA mA: Input terminal for current under 400mA.
• 10A: Input terminal for 10A current.
Auto Power
Off
• The auto power off feature will turn the meter off
after 30 minutes of inactivity.
Low Battery
Indication
• The battery icon will appear on the screen when
battery power is low and requires replacement.
6
SYMBOL DESCRIPTION
Continuity
Diode Test
Low Battery
F Farads (Capacitance)
ΩOhms
Hz Hertz (Frequency)
V Volts
A, mA, µA Current Range
AC Alternating Current / Voltage
AUTO Autoranging
DC Direct Current / Voltage
HOLD Display Hold
7
AC/DC VOLTAGE MEASUREMENT
On some low AC and DC voltage ranges - when test leads are not
connected to a device - the display on the screen may show a random,
changing reading. This is normal and caused by high-input sensitivity of
the multimeter. When connected to a circuit, the multimeter will display
a stabilised, accurate measurement.
1) Set the function switch to the VAC or VDC position.
2) Insert the black test lead banana plug into the negative COM jack.
3) Insert the red test lead banana plug into the positive VΩCAP jack.
4) Use the Mode button to select AC or DC voltage.
5) Connect the test leads in parallel to the circuit under test.
6) Read the voltage in the display.
8
DC CURRENT MEASUREMENT
Do not measure 20A currents for longer than 30 seconds. Exceeding 30
seconds may cause damage to the meter and/or test leads.
1) Insert the black test lead banana plug into the negative COM jack.
• For current measurements up to 4000μA DC, set the function switch to
the μA position and insert the red test lead banana plug into the μA
jack.
• For current measurements up to 400mA DC, set the function switch to
the mA position and insert the red test lead banana plug into the mA
jack.
• For current measurements up to 10A DC, set the function switch to the
10A position and insert the red test lead banana plug into the 10A jack.
2) Press the MODE button to show “DC” on the screen.
3) Remove power from the circuit under test, then open up the circuit at
the point where you wish to measure current.
4) Touch the black test probe tip to the negative side of the circuit.
5) Touch the red test probe tip to the positive side of the circuit.
6) Apply power to the circuit.
7) Read the current displayed on the screen.
AC/DC VOLTAGE MEASUREMENT
On some low AC and DC voltage ranges - when test leads are not
connected to a device - the display on the screen may show a random,
changing reading. This is normal and caused by high-input sensitivity of
the multimeter. When connected to a circuit, the multimeter will display
a stabilised, accurate measurement.
1) Set the function switch to the VAC or VDC position.
2) Insert the black test lead banana plug into the negative COM jack.
3) Insert the red test lead banana plug into the positive VΩCAP jack.
4) Use the Mode button to select AC or DC voltage.
5) Connect the test leads in parallel to the circuit under test.
6) Read the voltage in the display.
DC CURRENT MEASUREMENT
Do not measure 20A currents for longer than 30 seconds. Exceeding 30
seconds may cause damage to the meter and/or test leads.
1) Insert the black test lead banana plug into the negative COM jack.
• For current measurements up to 4000μA DC, set the function switch to
the μA position and insert the red test lead banana plug into the μA
jack.
• For current measurements up to 400mA DC, set the function switch to
the mA position and insert the red test lead banana plug into the mA
jack.
• For current measurements up to 10A DC, set the function switch to the
10A position and insert the red test lead banana plug into the 10A jack.
2) Press the MODE button to show “DC” on the screen.
3) Remove power from the circuit under test, then open up the circuit at
the point where you wish to measure current.
4) Touch the black test probe tip to the negative side of the circuit.
5) Touch the red test probe tip to the positive side of the circuit.
6) Apply power to the circuit.
7) Read the current displayed on the screen.
AC CURRENT MEASUREMENT
Do not measure 20A currents for longer than 30 seconds. Exceeding 30
seconds may cause damage to the meter and/or test leads.
1) Insert the black test lead banana plug into the negative COM jack.
• For current measurements up to 10A, set the function switch to the 10A
position and insert the red test lead banana plug into the 10A jack.
• For current measurements up to 400mA, set the function switch to the
mA position and insert the red test lead banana plug into the mA jack.
• For current measurements up to 4000µA, set the function switch to the
µA position and insert the red test lead banana plug into the µA jack.
2) Press the MODE button to indicate “AC” on the screen.
3) Remove power from the circuit under test, then open up the circuit at
the point where you wish to measure current.
4) 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.
5) Apply power to the circuit.
6) Read the current displayed on the screen.
9
RESISTANCE MEASUREMENT
To avoid electric shock, disconnect power to the test area and discharge
all capacitors before taking any resistance measurements. Remove the
batteries and unplug the line cords.
1) Set the function switch to the Ω CAP position.
2) Insert the black test lead banana plug into the negative COM jack.
3) Insert the red test lead banana plug into the positive Ω jack.
4) Press the MODE button until “Ω” displays on the screen.
5) Touch the test probe tips across the circuit or part being tested. It is
best to disconnect one side of the part being tested so the rest of the
circuit will not interfere with the resistance reading.
6) Read the resistance displayed on the screen.
CONTINUITY CHECK
To avoid electric shock, never measure continuity on circuits or wires that
have voltage on them.
1) Set the function switch to the Ω CAP position.
2) Insert the black test lead banana plug into the negative COM jack.
3) Insert the red test lead banana plug into the positive VΩCAP jack.
4) Press the MODE button until displays on the screen.
5) Touch the test probe tips across the circuit or wire you want to check.
6) If the resistance is less than approximately 35Ω, the audible signal will
sound.
DIODE TEST
The value that displays on screen during the diode check is the forward
voltage.
1) Set the function switch to the Ω CAP position.
2) Insert the black test lead banana plug into the negative COM jack.
3) Insert the red test lead banana plug into the positive VΩCAP jack.
4) Press the MODE button until display on the screen.
5) Touch the test probes to the diode or semiconductor being tested.
6) Reverse the probe polarity by switching probe position. Note this
reading.
7) The diode or junction can be evaluated as follows:
10
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