Mastech MS8922H User manual

Introduction
The Voltage Tester provides a simple and fast method
of testing AC and DC voltage up to 400 volts. It also
has a buzzer function.
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MS8922H
Warnings
•Read, understand and follow the Safety Rules and
Operating Instructions in this manual before using
this instrument.
•The tester’s safety features may not protect the user
if not used in accordance to the manufacturer ’s
instructions.
•Keep fingers away from the metal probe tips when
taking measurements.
•Comply with all safety codes. Use approved personal
protective equipment when working near live electrical
circuits.
•Use caution on live circuits. Voltages above
30V AC RMS, 42V AC peak, or 60V DC pose a shock
hazard.
•Do not use if the instrument or test leads appear
damaged.
•Verify tester’s operation by measuring a known voltage.
•Do not use the tester in wet or damp environments or
during electrical storms.
•Do not use the tester near explosive vapors,
dust or gasses.
•Do not use the tester if it operates incorrectly.
Protection may be compromised.
•Do not apply voltage that exceeds the tester’s
maximum rated input limits.
Input Limits
Function
Voltage DC, Voltage AC
Maximum Input
400V
International Safety Symbols
Indicates important safety information.
Dangerous Voltage
Double Insulation, Protection Class II.
This product conforms to UL STD
61010-1, 61010-2-030 and 61010-031
Conforms to UL STD. 61010-1,
61010-2-030 and 61010-031; Certified
to CSA STD C22.2 NO. 61010-1,
61010-2-030 and 61010-031
CAT III
Measurement category III is for
measurements performed in the
building installation. Examples are
measurements on distribution boards,
circuit-breakers, wiring, including
cables, bus-bars, junction boxes,
switches, socket-outlets in the fixed
installation, and equipment for
industrial use and some other
equipment, for example, stationary
motors with permanent connection to
the fixed installation.
Conforms to relevant European
Union directives
Voltage Tester Description
1.External test probe (-)
2.Instrument test probe (+)
3.LEDs for voltage display
4.GFCI test button
5.Function select switch
12
3
Both direct and alternating current

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AC/DC Voltage Measurements
Warnings
Observe all safety precautions when working on live
voltages.
1.Put the function select switch to audible.
2.Touch the test probes across the circuit being
measured.
3.The tester will turn on automatically if the voltage
exceeds 12 volts.
4.The LEDs will indicate the voltage.
5.For AC voltage, the “+” and “-” LEDs will illuminate.
6.For DC voltage, the “+” LED will illuminate if the
instrument test probe is touching the positive side
of the circuit. The “-” LED will illuminate if the
instrument test probe is touching the negative
side of the circuit.
7.The buzzer will ring when the Voltage is higher
than about 50 volts.
Voltage LED steps
Accuracy
±12,24,50,120,230,400V
-30% to 0% of indication
Response time
AC frequency range
<0.1s
50/60Hz
Operation time 30 seconds maximum
Recovery time 10 minutes after
maximum operation
time has been reached
Temperature range 14℉ to 131℉(-10℃ to 55℃)
Relative Humidity 80% maximum
Altitude 7000ft(2000m)
safety CAT III 400V
Weight 98.5g
Dimension 223*40*32 mm
Specifications
Maintenance
1.keep the tester dry. if it gets wet, wipe it off.
2.use and store the tester in normal temperatures.
temperature extremes can shorten the life of the
electronic parts and distort or melt plastic parts.
3.handle the tester gently and carefully. dropping
it can damage the electronic parts or the case.
4.keep the tester clean. wipe the case occasionally
with a damp cloth. do not use chemicals, cleaning
solvents, or detergents.
GFCI Test
Warnings
Observe all safety precautions when working on live
voltages. The GFCI test function can only be used
on 120 volt AC receptacles with GFCI protection.
1.Check the instructions on the specific GFCI
device you are testing before proceeding.
2.Put the function select switch to GFCI test.
3.Press the test button on the GFCI receptacle.
The GFCI should trip. If not, do not use the
receptacle and consult a qualified electrician.
If it does trip, press the reset button on the
GFCI receptacle.
4.Insert one test probe into hot side of the outlet
being tested.
5.Insert the other test probe into the ground of
the outlet being tested.
6.The tester should indicate 120VAC if the outlet
is powered and wired properly.
7.Press the GFCI test button.
8.The indicator lights should turn off indicating
the GFCI has tripped.
9.If the GFCI does not trip,either the receptacle
is mis-wired or the GFCI is defective.Do not use
the receptacle and consult a qualified electrician.
Note
The tester cannot test GFCI operation on 2-wire
(non-grounded) outlets.
DONGGUAN HUAYI MAS TEC H COM PANY LIMITED
Yuliangwei Industrial Area,Qingx i
Dongguan,Guangdong,China
http://www.p-mastech.com