Victor 70D User manual

Contents
1. Overview…………………………………………………………………………………………………1
2. Open-package Inspection……………………………………………………………………………….2
3. Safety Considerations…………………………………………………………………………………...3
4. Description of Safety Symbols……………………………………………………………………….....5
5. Description of Instrument Panel and Pushbutton Functions…………………………………….…..6
6. Other Functions………………………………………………………………………………………....8
7. Features……………………………………………………………………………………………….…9
8. DC Voltage (DCV)……………………………………………………………………………………...10
9. AC Voltage (ACV)……………………………………………………………………………………....11
10. DC Current (DCA)…………………………………………………………………………………..…12
11. AC Current (ACA)…………………………………………………………………………………..….13
12. Resistance……………………………………………………………………………………………..…14
13. Diode and On-and-Off Test……………………………………………………………………………..15
14. Capacitance (C)………………………………………………………………………………………..…16
15. Frequency (Hz)…………………………………………………………………………………..………17
16. Electric Field Measurement……………………………………………………………………………..18
17. Instrument Maintenance………………………………………………………………………….……..19

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Ⅰ. Overview
As a kind of intelligent 3 5/6 digital multimeter with automatic identification, steady performance and high
reliability, VICTOR70D is equipped with LCD display device with the text height of 33mm which features
clear reading, direct-viewing display and convenient operation. It can be used to measure DC voltage, AC
voltage, DC current, AC current, resistance, capacitance, frequency, diode and make on-and-off test;
meanwhile, it is available for unit symbol display, data retention, the measurement of maximum and
minimum value, automatic/manual range switching, automatic power off and alarm function. The complete
machine takes a switching integrated circuit which can directly drive LCD microprocessor and
double-integrating A/D and a digital display drive offering high resolution and high precision. Since the
meter features complete functions, high measurement accuracy and convenient operation, it is the ideal tool
in laboratory and factory as well as for radio fans and family.
Ⅱ. Open-package Inspection

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Open the package box and take out the meter, check carefully if the following accessories are absent or
damaged. If there is any absence or damage, please contact the distributor immediately.
Digital multimeter 1 set
Instruction Manual 1 copy
Meter pen 1 pair
6F22 Battery 9V 1
Alligator clip 1 set
Vibration resistance cover 1
Certificate 1 piece
Leather case 1
Product catalog 1 piece
Ⅲ. Safety Considerations

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In accordance with IEC1010 clause (the safety standard issued by International Electrotechnical
Commission), VICTOR70D is designed and produced according to the safety requirements of pollution
level Ⅱ.
Warning:
In order to avoid endangering the operator’s safety, prior to the operation of the instrument, please read the
instruction manual carefully, and conform to the safety warning information and operation instruction
strictly to use the instrument.
1. When voltage above 30V, current above 10mA, AC power line with inductive load or power line during
electric fluctuation is measured, please beware of electric shock.
2. Prior to measurement, check if the measurement function is in conformity with the LCD display, and if
the pushbutton switch is at the trigger position. Check if the meter pen is contacted reliably, connected
correctly, and grounded well and etc. in order to avoid electric shock.
3. Only if the meter is used with the matched meter pen, can it meet the requirement of safety standard.
When the line of the meter pen is damaged, it is necessary to replace another one of the same model or
the same electrical specification.

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4. Don’t use other unconfirmed or disapproved protector tube to replace the protector tube inside the
meter. Only the protector tube of the same model or same specification can be replaced. Before the
replacement, the meter pen must leave the measuring point and ensure there is no any signal at the
input terminal.
5. Don’t use other unconfirmed or disapproved battery to replace the battery inside the meter. Only the
battery of the same model or same electrical specification can be replaced. Before the replacement, the
meter pen must leave the measuring point and ensure there is no any signal at the input terminal.
6. When the electrical measurement is made, never let your body get in touch with the ground directly,
and don’t touch uncovered metal terminal, output port, lead clamp and etc. where earth potential may
exist. Dry clothes, rubber shoes, rubber cushion and other insulating material are usually used to keep
your body insulated against the ground.
7. Don’t store and use it in the high-temperature, high-humidity, inflammable and strong magnetic field
environment.
8. It may do damage to the meter and endanger the operator’s safety if the voltage value beyond the
permitted ultimate voltage value is measured. The ultimate voltage value permitted for measurement is
marked on the instrument panel, and never measure the value exceeding the standard. Don’t input the
ultimate value out of regulation in order to avoid electric shock and the damage to the meter.

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9. When the meter pen is inserted into the current socket, don’t measure any voltage for fear that the
meter should be damaged and the operator’s safety be endangered.
10. Don’t try calibrating or repairing the meter. When it is indeed necessary for that, only the qualified
professional personnel who have had special training or gained approval can make it.
11. During measurement, the requirement of measurement function must be in accordance with LCD
display. Please be sure to disconnect the line of the meter pen with the measured object first and ensure
there is no any input signal. It is forbidden to switch the function/range selection switch during
measurement
12. When“””is shown on LCD display, please replace battery immediately to ensure the measurement precision.
13. It is not allowed to insert the meter pen into the current terminal to measure voltage!
14. Please don’t change the circuits of the meter freely for fear that the meter be damaged and the safety be
endangered.
Ⅳ. Description of Safety Symbols

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Warning!
AC/DC
High Voltage! Danger!
In accordance with the
instructions of European
Trade Union
Ground
Fuse
Double Insulation
Battery Undervoltage
Ⅴ. Description of Instrument Panel and Pushbutton Functions
1. Instrument model.
2. LCD display area.
3. Function button: Used to select various measurement functions.
3-1 Backlight selection switch, trigger it once to turn on the backlight, and trigger it once more to
turn off the backlight.

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3-2 It is automatic identification when start-up. Press SELECT
to enter automatic measurement, MAX/MIN: the maximum
value and minimum value. Press the function button and
enter MAX mode, in which the maximum value is held;
press the button again to enter MIN mode, in which the
minimum value is held.After the MAX/MIN mode is
entered, the display device indicates the current value.
Press down MAX/MIN button for 2 seconds, and then exit
from MAX or MIN test.
3-3 Manual range selection switch. It is automatic identification
when start-up. Press SELECT to enter automatic measurement.
Trigger “RANGE”button, automatic/manual range switch. In
the mode of manual range, trigger “RANGE”button, and one
shift up with every single press is realized. When it goes to
the highest shift, it goes back to the lowest shift when the button
is pressed again. The procedure repeats again and again like
this in the same order. Press down the button for more than 2
9
8
7
6
5
4
3-5
3-4
3-3
3-2
3-1
2
1
Hz
DC/
EF
AC/

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seconds, then exit from manual range and enter the state of
automatic range measurement.
3-4 SELECT: Button switch, it is used to select various measurement functions.
3-5 HOLD: Hold readings. Press the button to lock the displayed value, and press it again to unlock it.
4. Power function switch.
5. Function selection button.
6. 10A current input jack: Measure the positive input terminal of 10A shift AC/DC current, and insert
red meter pen.
7. mAinput port: Measure the positive input terminal ofAC/DC.
8. COM input port: Measure the negative input terminal, and insert black meter pen.
9. input port: Measure the positive input terminal of voltage, frequency, resistance, capacitance,
diode as well as on-and-off test, and insert red meter pen.
Ⅵ. Other Functions
1. Automatic power off
After the meter is stopped for 10 min, it will cut off power automatically (power off), and then enter

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the dormant (power off) state. Within one minute before power off, the built-in buzzer will send out
warning tone for 3 times. After one minute, it beeps for several seconds and enters the dormant
(power off) state. If you want to restart power (power on), it is available to press “SELECT”，
“RANGE ”“MAX/MIN” or “HOLD” key, or press the power switch to make it. If you want to cancel
automatic power-off, press “SELECT”at the same time when you press down the power switch, then
automatic power-off will be cancelled after power on, and “APO”symbol will be also turned off.
7. Features

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1. General features
1－1 Display mode: LCD
1－2. Maximum display: 5999.3 5/6 display automatic polarity display and unit display.
1－3. Measurement mode: dual integration A/D conversion
1－4. Sampling rate: About 3 time/s.
1－5. 1－5. Over rang: Display “OL”
1－6. 1－6. Low voltage display: the symbol displayed.
1－7 When it is over 30V AC/DC voltage, the symbol “ ” is displayed
1－8 1－8 Working temperature: ：0～40℃
1－9 1－9 Storage temperature: -10～50℃, relative humidity <80%
1－10 1－10 Power: 6F22 9V
1－11 1－11 Volume (Dimensions): 185mm×91mm×49mm（Length, width and height）
1－12 Weight: About 408g (including battery )
2．Technical features.
2-1. Accuracy: ±（a% reading + d digits）, the ambient temperature for ensuring accuracy: 23±5℃, relative
humidity <75%.
2-2．The warranty period of calibration is one year from ex-factory date.

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8.DC Voltage (DCV)
1．Trigger “AC/DC/EF”, at this time it is at the AC/DC voltage automatic identification mode, and respectively
plug in the red and black meter pens into the holes of “VΩHz”and“COM”, as shown in the following
diagram.
2．The initial state of the meter is the AC/DC voltage automatic identification mode and a symbol of “SCAN” is
displayed; at this time, such buttons as “RANGE”.“MAX/MIN”.“HOLD” have no controlling functions,
and only when “SELECT” button is pressed to select the non-automatic identification mode of the
automatic range can such bottoms as “RANGE”.“MAX/MIN”.“HOLD” play their function controlling.
3．Touch the measuring point with the meter measuring pen and connect it in parallel to the circuit being tested,
and the polarity of the red meter pen wire and the tested voltage value are spontaneously displayed on the
display.
Caution:
a）Voltages over DC1000V orAC750V cannot be tested.
When measuring high voltages, special precautions must be taken to avoid
electrical shock. When measurement is completed, immediately disconnect
the meter pen and the measured circuit.
b）In case “OL” is displayed for manual range mode, it indicated the
× Ô¶ ¯Ê ¶± ð½»
Ö ±Á ÷µ çÑ ¹¼°µ ç
³ ¡Ç ¿È õ° ´¼ü
AC/
EF
DC/
Hz

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c）range has been exceeded and it is necessary to select higher range mode to complete this measurement.
Range
Accuracy
Resolution
600mV
±(0.5%+4d)
0.1mV
6V
1mV
60V
10mV
600V
100mV
1000V
±(1.0%+6d)
1V
Input impedance: 600mVrange>60MΩ，the others are 10MΩ. Overload protection ：1000VDC or
750Valternative peak.
9.AC Voltage (ACV)
1．1. Trigger “AC/DC/EF”, at this time it is at the AC/DC voltage automatic identification mode, and
respectively plug in the red and black meter pens into the holes of “VΩHz”and“COM”, as shown in the
following diagram.
2．The initial state of the meter is the AC/DC voltage automatic identification mode and a symbol of “SCAN”
is displayed; at this time, such buttons as “RANGE”.“MAX/MIN”.“HOLD” have no controlling functions,
and only when “SELECT” button is pressed to select the non-automatic identification mode of the

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automatic range can such bottoms as “RANGE”.“MAX/MIN”.“HOLD” play their function controlling.
3．Touch the measuring point with the meter measuring pen and connect it in parallel to the circuit being
tested, and the polarity of the red meter pen wire and the tested voltage
value are spontaneously displayed on the display.
Caution:
a) Voltages over DC1000V 或AC750V cannot be tested. The
manual range mode is as shown in the LCD.
“OL”，In case “OL” is displayed for manual range mode, it
indicated the range has been exceeded and it is necessary
to select higher range mode to complete this measurement.
b)At automatic identification and measurement, the AC threshold voltage is 0.5V; in case the voltage to be
measured is smaller than 0.5V;trigger the “SELECT” button to select automatic ACV measurement. In case the
AC mV mode is used, please select the “RANGE” button.
Range
Accuracy
Resolution
Hz
DC/
EF
AC/
³ ¡Ç ¿È õ° ´¼ü
Ö ±Á ÷µ çÑ ¹¼°µ ç
× Ô¶ ¯Ê ¶± ð½ »

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600mV
±(0.5%+4d)
0.1mV
6V
1mV
60V
10mV
600V
100mV
1000V
±(1.0%+6d)
1V
Input impedance: 10MΩ. Overload protection：1000VDC or 750V alternating peak. Display：Mean value
response（calibrated with sine wave）.
Frequency response：600mV(40-100)Hz. 6V-750V：(40－400)Hz
10. DC Current (DCA)
1．Plug the black meter pen into the hole of “COM” and the red meter pen
into the hole of “mA” or “10A”. Trigger the “ “ button or “ “
button, select automatic identification AC/DC measurement, and at this
time such buttons as “RANGE”.“MAX/MIN”.“HOLD” do not have the
controlling functions, and only when the “SELECT” button is pressed
in cycle to select automatic range AC or DC current measurement
can such buttons as “RANGE”.“MAX/MIN”.“HOLD” play the
relevant function controlling.
2．In case “OL” is displayed on the display, it indicates the current being measured has exceed the current
× Ô¶ ¯Ê ¶± ð½ »Ö ±
Á ÷µ çÁ ÷Ñ ¡Ô ñ¼ü
AC/
EF
DC/
Hz

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range, and please select higher ranges for measurements.
Caution:
a）At the 10A mode, current bigger than 10A cannot be measured, and at mA mode, the current bigger than
600 mAcannot be measured. Otherwise this will lead to the burning of the fuse or damage the instrument.
b) When the meter penis plugged in the input terminal of the current, it is strictly prohibited to have the meter
pen connected in parallel on any circuits.
Range
Accuracy
Resolution
60mA
±(1.0%+10d)
10μA
600mA
100μA
10A
10mA
The maximum input current:
10A (not exceeding 15s))
Overload protection: 0.6A/250V fuse
11.AC Current (ACA)
1．Plug the black meter pen into the hole of
“COM” and the red pen in the holes of “mA” or “10A”. Trigger
“ “ or “ ” to select automatic identification
× Ô¶ ¯Ê ¶± ð½»Ö ±Á ÷
µ çÁ ÷10AÑ ¡Ô ñ¼ü
AC/
EF
DC/
Hz
Hz
DC/
EF
AC/
Á ÷µ çÁ ÷Ñ ¡Ô ñ¼ ü
× Ô¶ ¯Ê ¶± ð½ »Ö ±

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AC/DC current measurements, and if the current is lower than
10% of the range, the automatic identification is lower
than its threshold, measurements cannot be conducted.
Please press “SELECT button to select automatic range AC/DC
current measurement.
2．In case “OL” is displayed on the display, it indicates the
current being tested has exceeded the current range, and please
select higher ranges for measurements.
Caution:
a）At the 10A mode, current bigger than 10A cannot be measured, and at mA mode, the current bigger than
600 mAcannot be measured.
b）Under automatic identification mode, such buttons as “RANGE”.“MAX/MIN”.“HOLD” do not play the
controlling functions.
c) When the meter penis plugged in the input terminal of the current, it is strictly prohibited to have the meter
pen connected in parallel on any circuits.
Range
Accuracy
Resolution

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60mA
±(1.5%+10d)
10μA
600mA
100μA
10A
±(2.0%+15d)
10mA
Maximum input current: ：10A（Not exceeding 15s）。
过Overload protection: 0.6A/250Vfuse；10A/250V fuse
40～100Hz。Frequency response:：40～100Hz。
12. Resistance
1．Trigger “ “ button, and respectively plug the red and black meter pens into the holes of “VΩHz”and
“COM”.”
2．After the instrument is started, triggering “ “ button is the automatic identification measurement of
resistor, diode, buzzer and capacitor. Under the mode of automatic identification such buttons of
“RANGE”.“MAX/MIN”.“HOLD”do not play the controlling functions, and in case the measurement is bigger
than 1MΩ, only when the “SELECT” button is triggered can the automatic range resistance mode can be
measured, and at this time “RANGE”.“MAX/MIN” “HOLD” play the controlling functions
Hz
DC/
EF
AC/
µ çÁ ÷10AÑ ¡Ô ñ¼ ü
× Ô¶ ¯Ê ¶± ð½»Ö ±Á ÷

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Caution:
a）When measuring the capacity, all the powers within the tested
circuits must be disconnected and the capacitance shall be sufficiently discharged
b）
When measuring the resistance, any occurrence of voltage may
Lead to inaccurate readings, and if the 250V protection
voltage is exceeded, it may damage the meter or threaten
the safety of the user.
b) When the range of 600Ω is in use, first sort-circuit the
meter pens and measure the resistance of the lead wires and then
deduct it in the actual measurement.
Range
Accuracy
Resolution
600Ω
±(0.8%+5d)
0.1Ω
6kΩ
±(0.8%+4d)
1Ω
60kΩ
10Ω
600kΩ
100Ω
µ çÈ ÝÑ ¡Ô ñ° ´¼ ü
Hz
DC/
EF
AC/
¶ þ¼«¹ Ü· äà ùÆ÷
× Ô¶ ¯Ê ¶± ðµ ç× è

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6MΩ
1kΩ
60MΩ
±(1.2%+10d)
10kΩ
Open circuit voltage:
600mV. Overload protection: 250V DC orAC peak values.
13．Diode and On-and-Off Test
1．Press “ ” button and respectively plug the red and
black pens into “VΩHz”and“COM”.
2．After the instrument is started, triggering “ “ button is the
automatic identification measurement of resistance, diode, buzzer
and capacitance. Under the mode of automatic identification such
buttons of “RANGE”.“MAX/MIN”.“HOLD”do not play the controlling
functions, trigger “SELECT” to select the diode or buzzer measurement,
at this time such buttons as “MAX/MIN”. “HOLD” play the controlling functions.
3. Connect the red meter pen to the positive of the diode, the black meter pen to the negative of the diode.
Caution:
a）In case the diode is open circuit or the polarities are connected reversely, “OL” will be displayed on the
× Ô¶ ¯Ê ¶± ðµ ç× è
¶ þ¼«¹ Ü· äà ùÆ÷
AC/
EF
DC/
Hz
µ çÈ ÝÑ ¡Ô ñ° ´¼ ü