protech QM1594 Manuale utente
LIGHT &
SOUND
LEVELS
RELATIVE
HUMIDITY
4000
DISPLAY
COUNT
CAT IV
600V
LIFETIME
WARRANTY
Multifunction
Environment
Digital Multimeter
SPECIALIST
Multifunction
Environment
Digital Multimeter User Manual
QM1594
Thank you for purchasing this Multifunction Environment Digital Multimeter.
Use this multimeter to measure environmental conditions such as sound &
light levels, indoor humidity and temperature. Ideal for use in server rooms,
construction sites, factories, laboratories, greenhouse / hydroponics, archive &
storage areas, and anywhere environmental conditions need to be considered.
Take light readings of various spaces and compare them to the recommended
levels listed in the enclosed manual. The multimeter also features non-contact
voltage detection and measures both AC & DC voltage and current.
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 12-16 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 - 250V
AC Voltage Range 400mV - 250V
DC Current Range 400µA - 10A
AC Current Range 400µA - 10A
Resistance 400Ω - 40MΩ
Capacitance (CAP) 50nF - 100µF
Frequency (Hz) Up to 10MHz
Light Meter Yes
Sound Meter Yes
Relative Humidity Yes
FUNCTIONS
Temperature Yes
Continuity Yes
Non-Contact
Voltage Detection
Yes
Data Hold Yes
Relative
Measurement
Yes
Diode Test Yes
Duty Cycle Yes
Autoranging Yes
LCD Backlight Yes
Auto Power Off Yes
The fuse & battery compartment are at the rear of the multimeter.
LCD Screen
Microphone
Range Button
Relative Measurement
Button
Mode Button
LED Indicator
Function Switch
COM Input Jack
Hz% Button
Photo Diode
Hold & Backlight
Button
Temperature
Type Button
Humidity &
Semiconductor Sensor
Positive VHz%
Input Jack
Positive mA, μA
Input Jack
10A Input Jack
3
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.
Mode The MODE button helps you to move through various
operations with various icons displayed on-screen. 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 HOLD button longer again to turn the
backlight off.
Note: The backlight will automatically turn off after
10 seconds.
Relative
Button
This allows you to make measurements relative to a
stored reference value. The displayed value is then
the difference between the referenced (stored) value
and the measured value.
• Press the REL button to store a reading. The REL
indicator will appear on the display. The display will
now indicate the difference between the stored
value and the measured value.
• Press the REL button to exit the relative mode.
4
5
Hz/% Button • Press the button to measure frequency or duty cycle
while measuring voltage.
• Press the button again to return to measuring
voltage.
°C/°F Room Use this button to switch between Celsius and
Fahrenheit room temperature measurements.
Non-Contact
Voltage
Detection
• Face the top of the multimeter to the ACV source
you wish to test.
• If source voltage is 50-1000V, the LED indicating
light will turn on.
NOTE: Static electricity or other sources of energy can
randomly trip the sensor.
Input Jacks • VHz%: Positive input terminal
• COM: Negative input terminal
• µA mA: Positive input terminal
• 10A: Positive input terminal for 10A currents
Auto Power
Off
The auto power off feature will turn the meter off
after 30 minutes of inactivity.
Low Battery
Indication will appear on screen when the battery voltage
drops below the operating level.
SYMBOL DESCRIPTION
Continuity
Diode Test
Low Battery
AC Alternating Current / Voltage
AUTO Autoranging
DC Direct Current / Voltage
HOLD Display Hold
V Volts
A, mA, µA Current Range
SOUND LEVEL MEASUREMENT
1) Set the function switch to the “dB” position.
2) Remove the meter and face the microphone to sound source in a
horizontal position.
3) The C-weighting curve is nearly uniform over the frequency range
from 30 to 10,000Hz, thus giving an indication of overall Sound level.
4)The fast response is suitable to measure shout bursts and peak values
from sound source.
5) The sound level will be displayed.
NOTE: Strong wind (over 10m/sec.) striking the microphone can cause
misreading for measurement in windy locations, a windscreen should be
used in front of microphone.
HUMIDITY MEASUREMENT
1) Set the function switch to the ON position.
2) Place the meter in the middle of the room you wish to measure.
3) Read the %RH in the display for about two hours.
6
7
LIGHT MEASUREMENT
1) Set the function switch to the desired “Lux” or “x10 Lux” range.
2) Remove the meter and face the photo detector to the light source in a
horizontal position.
3) Read the illuminance nominal from the LCD display.
4) Over-range: If the instrument displays “1” in the M.S.D. the input
signal is too strong, and a higher range should be selected.
5) When the measurement is completed, turn the function switch to the
OFF position and remove it from the light source.
6) Spectral sensitivity characteristic: To the detector, the applied photo
diode with lters makes the spectral sensitivity characteristic almost
meet C.I.E (International Commission on Illumination) photopia curve
V () as the following chart describes.
6 in 1 Digital Multimeter User Manual
14
100%(Relative Sensitivity) Spectral Sensitivity
Wavelength(nm)
•Recommended Illumination:
Locations
Office
*
Conference, Reception room.
Clerical work
Typing drafting
Factory
*
Packing work, Entrance passage
Visual work at production line
Inspection work
Electronic parts assembly line
Hotel
*
Public room, Cloakroom
Reception, Cashier
Store
*
Indoors Stairs Corridor
Show window, Packing table
Forefront of show window
Hospital
*
Sickroom, Warehouse
Medical Examination room
Operating room
Emergency Treatment
School
*
Auditorium, Indoor Gymnasium
Class room
Laboratory Library Drafting room
80%
60%
40%
20%
0
V(λ)
400 500 600 700
Lux
200 to 750
700 to 1,500
1000 to 2,000
150 to 300
300 to 750
750 to 1,500
1500 to 3,000
100 to 200
200 to 1,000
150 to 200
750 to 1,500
1500 to 3,000
100 to 200
300 to 750
750 to 1,500
100 to 300
200 to 750
500 to 1,500
8
LOCATIONS LUX
Locations Lux
Ofce Conference, Reception
room.
200 to 750
Clerical work 700 to 1500
Typing drafting 1000 to 2000
Factory Packing work, Entrance
passage
150 to 300
Visual work at production
line
300 to 750
Inspection work 750 to 1500
Electronic parts assembly
line
1500 to 3000
Hotel Public room, Cloakroom 100 to 200
Reception, Cashier 200 to 1000
Store Indoors stairs corridor 1500 to 3000
Show window, Packing
table
750 to 1500
Forefront of show
window
1500 to 3000
Hospital Sickroom, Warehouse 100 to 200
Medical Examination
room, Operating room
300 to 750
Emergency Treatment 750 to 1500
School Auditorium, Indoor
Gymnasium
100 to 300
Class room 200 to 750
Laboratory, library,
drafting room
500 to 1500
RECOMMENDED ILLUMINATION
9
OUTDOOR TEMPERATURE MEASUREMENT
1) Set the function switch to the °C or °F position.
2) Then the display will show the environment temperature reading
value directly.
3) Insert the black plug of the temperature probe into the COM jack.
4) Insert the red plug into the “VHz%” jack.
5) Touch the end of the temperature sensor to the area or surface of the
object to be measured. The display will show the temperature reading
value directly.
AC & DC VOLTAGE MEASUREMENT
1) Insert the black test lead banana into the negative COM jack.
2) Insert the red test lead banana into the positive VHz% jack.
3) Set the function switch to the desired voltage measurement.
4) Connect the test leads across the source or load under measurement.
5) Press the MODE button to select AC or DC.
6) Note the reading displayed on the screen. The polarity of the red
connection will be indicated when making a measurement.
7) Press the Hz% button to indicate “Hz” on the screen. Take note of the
measured frequency.
9) Press the Hz% button again to indicate “%” on the screen. Take note
of the measured % of duty cycle.
DC CURRENT MEASUREMENT
1) Insert the black test lead banana plug into the negative COM jack.
2) 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.
• 400mA DC - set the function switch to the mA position and insert the
red test lead banana plug into the mA jack.
• 10A DC - set the function switch to the 10A position and insert the red
test lead banana plug into the 10A jack.
3) Press the mode button until “DC” appears in the display.
4) Remove power from the circuit under test, then open up the circuit at
the point where you wish to measure current.
5) Touch the black test probe tip to the negative side of the circuit.
6) Touch the red test probe tip to the positive side of the circuit.
7) Apply power to the circuit.
8) Read the current in the display. The display will indicate the proper
decimal point, value and symbol.
10
AC CURRENT MEASUREMENT
CAUTION: Do not make current measurements on the 10A scale for
longer than 30 seconds. Exceeding 30 seconds may cause damage to the
meter and/or the test leads.
1) Insert the black test lead banana plug into the negative COM jack.
2) For current measurements up to:
• 4000µA AC - set the function switch to the µA position and insert the
red test lead banana plug into the µA jack.
• 400mA AC - set the function switch to the mA range and insert the red
test lead banana plug into the mA jack.
• 10A AC - set the function switch to the 10A position and insert the red
test lead banana plug into the 10A jack.
3) Press the mode button until ‘’AC” appears on the display.
4) Remove power from the circuit under test, then open up the circuit at
the point where you wish to measure current.
5) Touch the black test probe tip to the negative side of the circuit.
6) Touch the red test probe tip to the positive side of the circuit.
7) Apply power to the circuit. Read the current in the display. The display
will indicate the proper decimal point, value and symbol.
RESISTANCE MEASUREMENT
WARNING: To avoid electric shock, disconnect power to the unit
under test 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 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 VHz% jack.
4) Press the mode button until Ω appears in the display.
5) Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
6) Read the resistance in the display. The display will indicate the proper
decimal point, value and symbol.
Indice
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