iAN QAD-90011 User manual

MODEL: QAD-90011
DIGITAL MULTIMETER
MULTIMETRO DIGITAL
Please read carefully before using your equipment
and store this manual for future reference.
Por favor léalo cuidadosamente antes de usar su equipo
y guárdelo para uso de futuras consultas.
USER MANUAL / MANUAL DE USUARIO

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WARRANTY AND PRODUCT INFORMATION
These terms shall be governed and construed under laws
of the jurisdiction in which the product was purchased,
if any term here is held to be invalid or unenforceable,
such term (in so far as it is invalid or unenforceable) shall
be given no e󰀨ect and deemed to be excluded without
invalidating any of the remaining terms. Qian reserves
the right to amend any term at any time without notice.

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WARNING
To avoid possible electric shock or personal injury, and to
avoid possible damage to the Meter or to the equipment
during testing, adhere to the following rules:
Inspect the Meter’s case before using it, do not use the
Meter if it is damaged or the case (or part of the case) is
missing. Look for
cracks or missing plastic. Check the insulation around the
connectors.
Inspect the test leads for damaged insulation or exposed
metal. Check the test leads for continuity.
Do not apply more than the rated voltage, as marked on
the Meter, between the terminals or between any terminal
and grounding.
The rotary switch should be placed in the right position
and no modication of range shall be made while testing
is being conducted to prevent damage of the Meter.
When the Meter is working at an e󰀨ective voltage over
60V in DC or 30V rms in AC, special care should be
taken, as this poses a danger of electric shock.
Use the proper terminals, function, and range for your
testing.

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Do not use or store the Meter in an environment with high
temperature, humidity, or near explosions, open ames
or strong magnetic elds. The performance of the Meter
may deteriorate after dampened.
When using the test leads, keep your ngers behind the
nger guards.
Disconnect circuit power and discharge all high-voltage
capacitors before testing resistance, continuity, diodes
or hFE.
Replace the battery as soon as the battery indicator
signals it. With a low battery, the Meter might produce
false readings that can lead to electric shock and
personal injury.
Break o󰀨 the connection between the testing leads and
the circuit being tested, and turn the Meter power o󰀨
before opening the Meter’s case.
When servicing the Meter, use only the same model
number or replacement parts with identical electrical
specications.
Do not alter the internal circuit of the Meter at will to avoid
damage to the Meter or any accidents.
Soft cloth and mild detergent should be used to clean the
surface of the Meter when servicing. To protect the Meter
from corrosion, damage or any accidents do not use any
abrasives or solvents on its surface.

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The Meter is suitable for indoor use.
Turn the Meter power o󰀨 when not in use and take the
battery out and store when it won’t be used for a long
time. Constantly check the battery for leakage when
it has been used for a long time, and replace it if any
leaking appears. A leaking battery will damage the Meter.

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GENERAL SPECIFICATIONS
Max display: LCD 3 ½ digits (1999 count) 0.5” height
Polarity: Automatic, indicated minus, assumed plus.
Measure method: double integral A/D switch instrument
Sampling speed: 2 times per second
Over-load indication: “1” is displayed
Operating Environment: 0°C~40°C, at <80%RH
Storage Environment: -10°C~50°C, at <85%RH
Power: 9V NEDA 1604 or 6F22
Low battery indicator: “ ”
Static electricity: about 4mA
Product Size: 126 x 70 x 26mm
Product net weight: 108g (including battery)
MULTIMETER FUNCTION TABLE
DCV ACV DCA OHM hFE BAT °C
✓ ✓ ✓ ✓ ✓ ✓

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TECHNICAL SPECIFICATIONS
Guaranteed accuracy for 1 year, 23°C±5°C,
less than 80%RH
DC Voltage
RANGE RESOLUTION ACCURACY
200mV 100uV ±(0.5% of rdg + 3D)
2000mV 1mV
±(0.8% of rdg + 5D)20V 10mV
200V 100mV
1000V 1V ±(1.0% of rdg + 5D)
OVERLOAD PROTECTION: 220V rms AC for 200mV
range and 1000V DC or 750V rms for all ranges.
AC Voltage
RANGE RESOLUTION ACCURACY
200V 100mV ±(2.0% of rdg
+10D)
750V 1V
RESPONSE: Average response, calibrated in rms of a
sine wave.
Frequency range: 45Hz ~ 450Hz
Overload protection: 1000V DC or 750V rms for all ranges.

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DC CURRENT
RANGE RESOLUTION ACCURACY
200uA 100nA
±(1.8% of rdg +2D)2000uA 1uA
20mA 10uA
200mA 100uA ±(2.0% of rdg +2D)
10A 10mA ±(2.0% of rdg +10D)
OVERLOAD PROTECTION: 500mA 250V fuse (10A
range unfused).
MEASURING VOLTAGE DROP: 200mV
RESISTANCE
RANGE RESOLUTION ACCURACY
200Ω 0.1Ω ±(1.0% of rdg +10D)
2000Ω 1Ω
±(1.0% of rdg +4D)
20KΩ 10Ω
200KΩ 100Ω
2000KΩ 1KΩ

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MAXIMUM OPEN CIRCUIT VOLTAGE: 3.2V.
OVERLOAD PROTECTION: 15 seconds maximum
220Vrms.
OPERATING INSTRUCTIONS
DC & AC VOLTAGE MEASUREMENT
1. Connect red test lead to “VΩmA” jack, Black lead to
“COM” jack.
2. Set RANGE switch to desired VOLTAGE position, if
the voltage to be measured is not known beforehand, set
switch to the highest
range and reduce it until a satisfactory reading is
obtained.
3. Connect test leads to device or circuit being measured.
4. Turn the circuit or device that’s being powered’s power
on, its voltage value will appear on the Digital Display
along with the voltage polarity.
DC CURRENT MEASUREMENT
1. Red lead to “VΩmA”. Black lead to “COM” (for
measurements between 200mA and 10A connect the red
lead to “10A” inserting it completely into the jack).
2. Set RANGE switch to desired DCA position.

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3. Connect the test leads IN SERIES to the device or
circuit being measured’s load.
4. Read current value on Digital Display.
5. Additionally, the 10A setting is designed for intermittent
use only. Maximum contact time of the testing leads with
the circuit is 15 seconds, with a minimum wait time of 15
minutes between tests.
RESISTANCE MEASUREMENT
1. Red lead to “VΩmA”. Black lead to “COM”.
2. Set RANGE switch to desired OHM position.
3. If the resistance being measured is connected to a
circuit, turn o󰀨 power and discharge all capacitors before
measuring.
4. Connect test leads to the circuit being measured.
5. Read resistance value on Digital Display.