Vichy VC97 Operation Manual

DIGITAL

MULTIMETER

OPERATION

MANUAL

1.1.1.

INTRODUCTION

The instrument is a high performance, high accuracy , 33/4digit , 42mm digit high LCD multi-meter for measuring DC and AC voltage, DC and AC current, Resistance and Capacitance, Frequency, temperature, duty circle, Transistor, Diode and Continuity test. Design parameter: unit indication, data hold (HOLD), relatively measuring (REL), AUTO/MANUAL range, auto off and buzzer sou nds, etc.

The Dual-slop A/D converter CMOS technology for auto-zero, polarity selection and over-rang e indication. Full overload protection is provided. Because of its outstanding features, it is most suitable for use on production lin es or for lab, R & D, m ainten ance and repair work.

222

.SPECIFICATIONS

2.1

GENERAL

SPECIFICATIONS

Display: 3 3/4digit LCD with a max readings of 3999 Measuring method: Dual - slop integrating A/D converter system. Sampling rate: Approx. 3times/second. Max. Common Mode Voltage: 500V DC/AC RMS. Range select method: Automati c and Manual Polarity: Automatic negative polarity indication. Over range indication: Only the MSD “ OL ” display. Low battery:The “ ” displays . Safety standards

EMC/LVD. The meter is up to the standards of IEC1010

Pollution Degree 2, Over vol tage category Ⅱ or double insulation Ⅱ .

Operating environment: Temperature (0 ~ 40) ℃ , humidity<80%RH.

Storage environment: Temperature (-10~50) ℃ , humidity<80%RH.

Power: Double, standard 1.5 volt battery. AAA 7# battery. Dimension: 190mm (H) × 93.5 mm (W) × 3 7m m (D).

Weight: Approx. 4 20g(including battery).

2.2

ELECTRICAL

SPECIFICATIONS

Accuracy is ± (percent age of reading + number of digit) at(23 ± 5) ℃ ,<75%RH .

DCDCDC

Voltage

Input impedance: 400mV range: more th an 40M Ω other ran ge: 10M Ω Overload protection: 1000V DC or AC peak value

DCDCDC

mVmVmV

:::

ACACAC

Voltage

Input impedance: 400mV range: m ore th an 40M Ω ; other range: 10M Ω Frequency response: 750V range:40-100Hz oth er range: 40-400Hz Overload protection: 1000DC/750V AC RMS Indication

mean val ue response ( rms of sine wav e)

Range

Accuracy

Resolution

400mV

± (0. 5 %+4d)

0.1mV

1mV

40V

1 0 mV

400V

1 00 mV

1000V

± (1.0%+ 6 d)

Range

Accuracy

Resolution

400mV

± ( 0.5 %+ 4 d)

0.1mV

Range

Accuracy

Resolution

± ( 0. 8%+ 10 d)

1mV

40V

1 0 mV

400V

1 00 mV

7 50V

± (1.0%+ 10 d)

Resistance

Overload protection:250V DC/AC peak value Open ci rcuit v oltage: 400mV

Note: at 400 Ω rang e, should short the test leads and m easure the resi stance of the wire,

then, minus from measuring.

DCDCDC

Current

Overload protection ： 0.5A/250V fuse, 10A/ 250 V fuse.

Max measuring voltage: Full scale mA ran ge: 1.2V ; A range:100

mV.

Max input current: 10A ( max. up to 15 seconds).

ACACAC

mVmVmV

ACACAC

Current

Overload protection ： 0.5A/250V fuse, 10A/250 V fuse

Max measuring voltage: Full scale mA ran ge: 1.2V A ran ge: 100 mV Max input current: 10A (up to 15 seconds). Frequency response: 1 0A range: 40-100Hz; other range: 40-400Hz

Capacitance

Overload protection ： 250V DC/AC peak value

Frequency

Input sensitivity: 1.0V

Range

Accuracy

Resolution

400 Ω

± (0. 8 %+5d)

0.1 Ω

4k Ω

± (0.8%+4d)

1 Ω

40k Ω

10 Ω

400k Ω

100 Ω

4M Ω

1k Ω

40M Ω

± (1.2%+ 10 d)

10k Ω

Range

Accuracy

Resolution

400u A

± ( 1.0 %+ 10 d)

0.1u A

40 0 0u A

1u A

40m A

± ( 1.2 %+ 8 d)

10 u A

40 0 m A

100 u A

10A

± (1.2%+10d)

1 0 m A

Range

Accuracy

Resolution

400 mV

± ( 1.6 %+ 8 d)

0.1 mV Range

Accuracy

Resolution

400u A

± ( 1.5%+10d)

0.1u A

40 0 0u A

1 u A

40m A

10 u A

40 0 m A

100 u A

10A

± (2.0+15d)

1 0 m A

Range

Accuracy

Resolution

4n F

± ( 2 .5%+ 20 d)

1 pF

40n F

± (3.5%+8d)

1 0pF

40 0 n F

100pF

4uF

1nF

40uF

10nF

200uF

± (5 .0 %+ 10 d)

100 n F

Range

Accuracy

Resolution

100Hz

± ( 0. 5% + 10 d)

0.01Hz

1000Hz

0.1Hz

10kHz

1Hz

100kHz

10Hz

1MHz

100Hz

30MHz

1kHz

Overload protection: 250V DC/A C peak value

Diode

and

continuity

Test

Overload Protection:250V DC/AC peak value Warning: do not i nput volt age at the range for safety.

Transistor

hFE

Test

Temperature

Thermocouple: K type Warning: do not i nput volt age at the range for safety.

3.3.3.

FRONT

PANEL

DESCRIPTION

1.LCD

2. Fu nction key 2-1.HOLD Key 2-2.REL Key 2-3.Hz/DUTY Key 2-4 “ select ” key 2-5.RANGE Key

3.Rotary Switch

4.Vol tage, Resistance, Frequency socket.

5.COM input jack term inal

6.Less than 400mA input jack terminal

7.10A input jack terminal

4.OPERATION

1.Check the 1.5 -volt b atterybysetting the ROTAR Y Switch remove s to OFF position.

If the battery is weak, a sign will appear on the display. If thi s does n ot appear on

the display, proceed as below . See MAINTENANCE if the battery has to be replaced.

2.The mark, or sig n next to the l ead jacks, is for warning that the input voltage or current should not exceed th e indicated values. This i s to prevent fr om damaging the internal circuits.

3.The function switch should be set to the range that you want to test before operation.

444

.1.1.1

DCDCDC

Voltage

measurement

1) Insert the BLACK test lead to “ COM ” jack and RED test lead to the “ V/ Ω /H z ”

jack. 2 ) Set t he FUNCTION switch to “ ” ran ge.

3) The d efault rang e is Auto range, and "AUTO" is displayed. Pressing RANGE k ey switch to m anual range, 400m V/4V/40V / 400V/1000V can be select ed

4) Conn ect the test leads to the tested point, the voltage and polarity wh ich connected with the red l ead will appear o n L CD.

Note:

1) Manual range, if LCD display "OL", over rang e i s being indicated and the FUNCTION switch must be set to a h igher ran ge.

2) D o not measure over 1000V , or , the meter will be damaged.

3) Caution to avoid contact with high voltage circu its when measuring high v oltage.

Range

Description

Test Condition

Display read approx. forward voltage of diode

Forward DC Current approx.0.5mA. Reversed voltage approx.

1.5V.

Buzzer sounds i f resistance Between terminals V/ Ω a n d COM is less than about 7 0 ± 30 Ω .

Open circuit voltage:

0.5V Range

Displaying value

Test condition

hFE NPN or

PNP

0 ～ 1000

Base Cu rrent ap p rox.

15uA, Vce approx . 1.5V

Range

Displaying value

Test condition

(- 2 0-1000) ℃

<<<

400 ℃ ± ( 1.0 %+ 5 d)

≥ 400 ℃ ± (1.5%+15d)

1 ℃

444

.2.

ACACAC

voltage

measurement

1) Insert the black test lead to “ COM ” jack an d the red one to “ V/ Ω /Hz ” jack.

2) Set the fu nction switch to “ ” ran ge.

3) The defau lt range is Auto range, and "AUTO" is d isplayed. Pressing RANGE key swit ch to m anual range, 400m V/4V/40V / 400V/700V can be select ed

4) Connect the test leads to the test point, the voltage of the two points which connected with the leads wil l appear on L CD.

444

.3.3.3

DCDCDC

Current

measurement

1) In sert the BLACK test lead to “ COM ” jack and RED test lead to the “ mA ” (max . 400mA) or "10A" jack (max. 10A).

2 ) Set the FUNCTION switch to current range. Pressing “ ” key to select

DC measure method , conn ect the leads across to the tested ci rcuit, the current value and pol arity the red lead connect with will appear on LCD.

Note:

1) If the current range is un known beforehand, set the FUNCTION switch to a

high range and work down.

2) When o nly the figure " OL " is displayed over range is being indicated and the

FUNCTION switch must be set to a h igher ran ge.

3) The max input current is 400mA,or 10A depending u pon the jack used.

Excessive current will blow the fuse.

444

.4.

ACACAC

current

measurement

1) Insert the BLACK test lead to “ COM ” jack and RED test l ead to the mA ” (max.

400mA) or "10A" jack (max. 10A).

2 ) Set the FUNCTION switch t o current rang e. Pressing “ ” key t o select

AC measure method , conn ect the leads across to the tested ci rcuit, the current value will appear on LCD.

Note:

1) If the current r ange is unkn own beforehand, set the FUNCTION switch to a high range and work down.

2) When only the figure " OL " i s displayed over range is being indicated and th e FUNCTION switch must be set to a h igher ran ge.

3) The max input current is 400mA,or 10A depending u pon the jack used.

Excessive current will blow the fuse.

444

.5.5.5

Resistance

measurement

1) Connect the BLACK test lead to “ COM ” jack and RED test l ead t o the “ V/ Ω

/Hz ” jack.

2 ) Set t he FUNCTION Switch to “ Ω ” range.

3) Press "RANGE" to select A uto/Manual range

4) If measuring small resistance, should short test leads f irst, press "REL" on ce,

ensure measure v alue accuracy .

Note:

1)Touse manual method, i f the resistance range is unknown befor ehand, set the FUNCTION switch to a higher range and work down.

2 ) If "OL" displays on LCD, i t means over-range. When m easuring resistance more

than 1M Ω , the meter may t ake a few seconds to stabilize. This is n ormal for

high resistance readings.

3) When the input is not con nected, i.e. at open circuit , the fi gure " OL " will be displayed for the over range condition.

4) When checking in-circuit resistance, be sure the power has be en switched off

all

capacitors are fully di scharged.

5 ) D o not input any voltage at this range.

444

.6.6.6

Capacitance

measurement

1) Set the FUNCTION switch t o " " position.

2) Press "REL" once t o adjust to zero.

3 ) Connect the tested capacitor to “ COM ” , “ V/ Ω /Hz ” input sockets in

accordance to the leads (the polarity of the red lead is “ + ” ), the value wil l be

displayed on LCD.

4) When m easuring more than 4u F, it takes 15 seconds to stabili ze.

Note:

1) Capacit ance range h ave only auto mode.

2) Before measuring each time, m ust press "REL" to ensure m easure accur acy.

3) Units: 1u F=1000nF 1nF=10 00p F

4) Capaci tors should be fully discharged to avoid damaging the mete r.

444

.7.7.7

Frequency

measurement

1) Connect test leads or shield cable to "COM" and "V / Ω /Hz " jack.

2) Set the FUNCTION switch to the "Hz" range, and connect test l eads or c able across th e source load under test.

Press "Hz/Duty" to switch f requency/duty cycle, and display the reading of frequency or duty cycle.

Note:

1) F requency rang h ave only auto range m ode.

2) D o not a pply more than 250V DC/AC peak value t o the in put. Indication is possible at voltage higher than 10V AC rms, but readings may be out of specification.

3) In noisy environment, it i s preferable to use shield cable for measuring small signal.

4) Be caution to avoid contact with high tension circuits when measurement high voltage.

444

.8.8.8

hFE

measurement

1) Set th e function switch to hFE range.

2 ) Define the transistor is NPN or PNP type, insert the emitter, base and collector

separately t o the correct hole, the approx. value will be displayed on LCD.

444

.9.9.9

Diode

and

continuity

Test

1) Connect the BLACK test lead to “ COM ” jack and RED test lead to the “ V Ω Hz ”

jack..

2 ) Set th e FUNCTION switch to “ ” position. Pr ess " DC/AC " k ey which

select diode measure method.

3) Forward m easure: Connect RED test lead to the posi tive of th e test di ode, BLACK test lead to the negative, then, reading of a pprox. forward voltage of this diode displays.

4) Reverse m easure: Con nect BLACK test lead to the positive of the test diode, RED test l ead to the negative, the mark "OL" will be displayed.

5) P roper diode testing should include both steps.

6) Press " " to select con tinuity mode.

7) Connect the test probes to two points of circu it, if the resistance is lower than

approx. 50 ± 20 Ω.Buzzer soun ds.

Note:

Do not i nput volt age at this range.

444

.10

Temperature

measurement

Set the function key to “ ℃ ” range.

Insert the cold-point of the thermocouple to “ K TEMP ” hole, and the work-point to the place wanted to take temperature, the value will be displayed o n L CD.

NOTE:

When the input terminal is in open ci rcuit, wi ll display the “ normal temp. ”

Do not ch ange the thermocouple, or, the accuracy can not be secured.

Do not i nput volt age at this range.

444

.1.1.1

111

Data

hold

Press “ Hold ” key, the current data will d isplay on LCD; Press the key again, will cancel the hold function.

4.4.4.

111

222

Auto

power

off

1) Stop w orking for 15m ins, the instrument is auto off and in to the sleep mode. The

buzzer wil l sound before power

off.

Press any key to turn on th e power.

2 ) Pressi ng “ ” key before tur ning on c an cancel the function.

555

...

WARNING

1) When m easuring voltage ensure that instrument is not connected or switched to a current or resistance range, or t o the diode check. Always ensure that the correct terminals are used for the ty pe of mea surement to be made.

2) Take extreme care when measuring v oltage above

50V,

especially from sources

where high energy i s existed.

3) Av oid m aking conn ections t o “ live ” circuits whenever possible.

4) When making current measurements ensure that the circuit not “ live ” bef ore opening it in order to connect the test leads.

5) Before making resi stance measurements or diode test, ensure that the ci rcuit under test is de-energized.

6) Always ensure that the correct function and range is selected. If in doubt about the correct rang e t o use, start wi th the highest and work downwards.

7) Extreme care should be taken when using the instrument to conj unction with a current transformer connected t o the termin als if an open circuit occurs.

8) Ensure that th e test leads and probes are good condi tion with no dam age to the insulation.

9) T ake c are not to exceed the o ver-load limits as g iven in the specification.

10) FUSE F OR REPLACEMENT MUST BE OF THE CORRECT TYPE AND RATING.

11) Before opening the c ase of the instrument to replace b attery or fuse, disconnect the test leads from any external circu it, set the selector switch to “ OFF ” position.

666

...

MAINTENANCE

Do not try to m odify the inner circuit.

1) K eep the multime t er

dry.

Keep the multi-meter a way from dust and dirt

2) Use and s tore the multi-meter only i n normal temperature environments. Temperature extremes can shorten the l ife of e lectronic dev ices, dam age batteries ,

and distort or melt plastic part.

3) Handle the multi meter gently and carefu lly. Dropping i t c an damage the circuit boards and case a nd can cause the mu lti-meter to work im properly al though the holster can provide en ough protection.

4) W ipe the multi-meter with a damp cloth occasionally t o keep it looking

new.

Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the multi-meter.

5) T ake out off the battery if do not use for a long tim e. When LCD displays “ ” , the battery should be replaced. a.

Ensure the instrument is not connected to an y external circuit. Set the selector switch to

OFF position and remove the test leads from terminals.

Remove the screw on the bottom case an d lift the bottom case.

Remove the spent b attery and repl ace i t with a batt ery of the same type.

6) Replace the fuse with same type and rating as the replacements.

NOTE:

1) D o not input a voltage over 1000V DC/AC peak value. 2 ) Do not measure volt age at current range, resistance range, diode and buzzer

range.

3 ) D o not use the meter i f the battery is not replaced well or the battery c ase is not

fixed.

4 ) Before replacing battery or fuse, rel ease the test leads from the test point and

turn power

off.

MB-VC97-62

Vichy VC97 Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual