Victor VC921 User manual

DIGITAL MULTIMETER
OPERATION MANUAL
WARNING
To avoid electric shock or injured
or damage the instrument, please
read the manual carefully before
operation.
Ⅰ. SAFETY RULES
This series meter meets the
standard of IEC1010. ead it
before operation.
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1．Check the case of the meter
and test leads before operation.
2．Do not input over range when
testing.
3. Be careful when measuring
voltage over ACV 40V or DCV
60V.
4．When measuring, must select
correct function and range.
5．The test lead should be keep
away from the tested point when
change the function.
6. Do not try to modify the circuit,
Or you may damage the instrument
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and endanger personal safety.
7. Safety symbols
“ ” exists high voltage , “ ”
dual insulation ,“ ” warning
8．Electric symbols
“ ”GND， “ ” low battery
“ ” AC “ ” DC “
”continuity test “ ”diode “
”relative value measurement
“ ”auto range
II.KEY FUNCTION
1. EL: press this key ,readings
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back to zero , enter into relative
measurement ,LCD display “
” symbol, press it again, out from
the relative value measurement
function .when at Hz range, can
switch to frequency or duty cycle
(0.1~99.9%) measurement mode.
2. ANGE key :selecting operation
mode of auto range or manual
range .the default mode of this
meter is auto range , LCD display“
” symbol, press this key will
change to manual range, press it
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one more time to increase a new
range, from low to high cycle in
turn .press the key for more than 2
seconds, will back to auto range
mode.
Ⅲ. SPECIFICATION
3-1．GENERAL
3-1-1 ．Displaying : LCD
displaying
3-1-2．Max. indication: 3999 （3
3/4）, auto polarity indication
3-1-3 ．Measuring method: dual
slope A/D transfer
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3-1-4 ．Sampling rate: approx. 3
times/sec
3-1-5 ．Over range indication:
displays “OL”
3-1-6 ．Low battery indication: “
” symbol displays
3-1-7 ．Operation: (0 ～
40)℃，relative humidity <80%
3-1-8．Power：2×1.5V battery
3-1-9．Meas.:124×80×20 mm
3-1-10 ．Weight: approx.
140g（including battery）
3-1-11. Accessories: instruction
manual, gift box and battery
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3-2．TECHNICAL DATA
3-2-1 ．Accuracy: ± （DG×a%
+ digit ） at (23±5) ,<75% H℃
one year guarantee from
production date
3-2-2.DCV
ANG
EACCU ACY ESOLUTION
400mV
±(0.5%+4)
0.1mV
4V 1mV
40V 10mV
400V 100mV
600V ±(1.0%+4) 1V
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Input resistance： 10MΩ
Overload protection: 400Mv
range:250V MS ＜
10seconds ;other
ranges 600V MS ＜
10seconds .
3-2-3. ACV True MS
Measurement
ANGE ACCU ACY ESOLU7TION
400mV ±(1.5%+6) 100μV
4V
±(0.8%+6)
1mV
40V 10mV
400V 100mV
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600V ±(1.0%+6) 1V
Input resistance: 10MΩ
Overload protection: 400mV
range: 250V MS ＜
10seconds(manual range only).
Other ranges 600V MS ＜
10seconds.
Frequency response: Sine wave
and triangular wave :
(40~1000)Hz, other waveform:
( 40~400)Hz
Displaying: True MS response
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3-2-4. CONTINUITY TEST
Overload protection: 250V MS
Warning: do not input voltage at
this range.
ange Display Test Condition
Buzzer
sound at
less than
(50±30)Ω
OCV: about 0.5V
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