Victor VC97 Instruction Manual

DIGITAL MULTIMETER INSTRUCTION MANUAL
1.

SUMMARY

This 3 3/4 digital multimeter with highly stable performance is driven by 2 pieces 1.5V battery. It
uses a LCD with 32mm high figure, which makes the reading clearer and the operation more
convenient.
The digital multimeter holds functions of measuring DCV, ACV, DCA, ACA, resistance, capacitance,
frequency, temperature, duty cycle, transistor, diode, and continuity, etc. It also can provide special
functions including unit symbol display, data holding, relative value measuring, auto/manual range
switching (RANGE), auto power off and warning alarm. To assure high accuracy and resolution, it
adopts an 4-bit microprocessor and a dual integral A/D conversion IC as its core which can drive
LCD directly. It is an ideal tool for labs, factories and radio-technology.
2.

SAFETY PRECAUTIONS

The instrument is designed according to IEC1010 standard (safety standard issued by International
Electro technical Committee). Please read the following before operation.
2.1 Check the connection and insulation of test leads to avoid electric shock.
2.2 To avoid electric shock and damage to the meter, do not input voltage higher than DC 1000V or
AC 750V during measurement.
2.3 When measuring voltage higher than DC 60V or AC 40V, please be careful.
2.4 Select correct function and range to avoid fault operation.
2.5 Please move the test leads away from test points when switching the function.
2.6 Please don't input voltage in current terminal.
2.7 Please don't modify the circuit arbitrarily, it may cause safety problem.
2.8 Introduction for safety symbols:
" " exists high voltage, " " GND, " " dual insulation, "
" " Low battery indication.
3.

FEATURES

3.1 General Characteristics
3.1.1 Display: LCD;
3.1.2 Max display: 4000 (3 3/4) digits, automatic polarity and unit symbol display;
3.1.3 Measurement method: double integral A/D conversion;
3.1.4 Sampling rate: approx.3 times/sec.
3.1.5 Over-range display: "OL" displayed in the highest digit.
3.1.6 Low battery display: " "
3.1.7 Working environment: (0～40)℃, relative humidity: <80%;
3.1.8 Store condition: (-10～50)℃, relative humidity: <80%
3.1.9 Power supply: 2pcs 1.5V battery ("AAA"7# battery);
3.1.10 Dimension: 185×93×35mm (length*width*height);
3.1.11 Weight: approx. 290g (including battery);
3.1.12 Accessories: test leads, user manual, TP01 temperature probe, gift box, and 2*1.5V batteries.

3.2 Technical Features

3.2.1 Accuracy: ± (a% × reading data + digits). To assure accuracy, the environment temperature
should be (23±5) ℃, relative humidity should <75%. One year guarantee since production date.
3.2.2 DC Voltage（DCV）
Range Accuracy Resolution
400mV
±(0.5%+4)
4V
40V
400V
1000V
Input impedance: at 400mv range >40MΩ, at other ranges is 10MΩ.
Overload protection: 1000V DC or 750V AC peak value
3.2.3 AC Voltage（ACV）
Range
400mV
4V
40V
400V
750V
Input impedance: at 400mv range >40MΩ, at other ranges is 10MΩ.
Overload protection: 1000V DC or 750V AC peak value
Frequency response: at 750V range: 40~100Hz, at other ranges: 40~400Hz
Displaying: sine wave RMS (average value response)
3.2.4 DC Current（DCA）
Range
400uA
4000uA
40mA
400mA
4A
" Operator must refer to manual,
20A
Maximum voltage drop: 400mV for mA range, and 200mV for A range
Maximum input current: 20A (for 15 seconds).
Over load protection: 0.5A/250V fast action fuse and 13A/250V fast action fuse.
3.2.5 AC Current（ACA）
Range
400uA
4000uA
40mA
400mA
4A
20A
Maximum voltage drop: 400mV for mA range, and 200mV for A range
Maximum input current: 20A (for 15 seconds).
Over load protection: 0.5A/250V fast action fuse and 13A/250V fast action fuse.
Frequency response: 40~100Hz under 10A range, 40～400Hz at other ranges.
3.2.6 Resistance（Ω）
Range
400Ω
0.1mV
4kΩ
1 mV
10 mV
100 mV
±(1.0%+4) 1V
Accuracy Resolution
±(1.5%+6) 0.1mV
1 mV
±(0.8%+6) 10 mV
100 mV
±(1.0%+6) 1V
Accuracy Resolution
0.1μA
1μA
±(1.0%+5)
10μA
100μA
1mA
±(2.0%+5) 10mA
Accuracy Resolution
0.1μA
1μA
±(1.5%+5) 10μA
100μA
1mA
±(2.0%+10) 10mA
Accuracy Resolution
±(0.8%+5) 0.1Ω
±(0.8%+1) 1Ω
40kΩ
400kΩ
4MΩ
40MΩ ±(1.2%+5)
Open circuit voltage: 400mV.
Overload protection: 250V DC/AC peak value
NOTE: At 400Ω range, short the test leads first to measure the wire resistance and then
subtracts it from the real measurement. Or press "REL" to clear the wire resistance and read the
value directly.
3.2.7 Capacitance（C）
Range Accuracy
4nF ±(2.5%+6)
40nF
400nF
±(3.5%+8)
4μF
40μF
200μF ±(5.0%+8)
Overload protection: 250V DC/AC peak value
WARNING: Do not input any voltage at this range! The capacitor must be completely
discharged before making measurement. When measuring in line capacitor, make sure the
power is cut off before testing.
3.2.8 Frequency（F）
Range Accuracy
10Hz
100Hz
1000Hz
10kHz ±(0.5%+4)
100kHz
1MHz
30MHz
Input sensitivity: 0.7V.
Overload protection: 250V DC/AC peak value.
3.2.9 Transistor (hFE)
Measurement Range
Base current is approx 15uA,
hFE NPN or PNP 0~1000
3.2.10 Diode and Continuity Test
Range Description
Diode forward voltage drop
When the resistance under test is
less than 70±10Ω, buzzer sounds
10Ω
100Ω
1kΩ
10kΩ
Resolution
1pF
10pF
100pF
1nF
10nF
100nF
Resolution
0.001Hz
0.01Hz
0.1Hz
1Hz
10Hz
100Hz
1kHz
Test conditions
Vce is about 4.5V
Test Conditions
Forward DC current is
approx 0.5mA, reverse
voltage is approx 1.5V.
Open circuit voltage:
0.5V