MULTI MEASURING INSTRUMENTS VD-320 Manuel utilisateur

DIGITAL VOLTAGE CHECKER

MODEL VD-320

INSTRUCTION MANUAL

Thank you very much for selecting our voltage checker model VD-320.

This model is complex instrument and employ a very reliable

mechanical/electronic design.

Before you use your new instrument, read this Instruction Manual

completely and familiarize yourself thoroughly with all functions.

With proper use and care, your tester will give you years of

satisfactory service.

FEATURES

●Only one point contact forAC/DC voltage measurement to avoid the short circuit.

●High input impedance for safe operation.

●Polarity display for DCV measurement.

●For the identification of hot line or earth line for ACV circuit.

●Useful one hand operation and data hold function.

●Auto power off function is provided.

SAFETY SUMMARY

The WARNINGs which appear on the following page must be followed to ensure operator

safety and to retain the operating condition of the tester.

Safety Symbols:

Indicates the operator must refer to an explanation in this manual.

Indicates terminals at which dangerous voltages may exist.

WARNING

* Do not make voltage measurements of power lines carrying more than 250V.

In some cases, power lines may carry voltage spikes of several times of the normal

supply voltage. This tester should not be used to measure power lines.

* Possible Electrical Shock or Fire Hazard

Do not expose this tester to rain or moisture. Do not operate the tester in the presence

of flammable gases or fumes.

Always check to make sure that the function switch is set to the proper position.

When making measurements, use CAUTION as dangerous voltages may be present in

normally safe areas.

To avoid electrical shock, use CAUTION when working above 60V DC or 25VAC rms.

Such voltages pose a shock hazard.

Never make measurements with the battery cover off.

Never fail to keep the maximum tolerable input.

This tester is designed for low voltage applications. To avoid electrical shock or

damage, the measurement is limited to the circuit under 500VAC or 400V DC.

Never operate this instrument if it becomes wet, damp or has any liquid condensation

build-up on any part of the instrument.

SPECIFICATIONS

Measuring function: DC voltage,AC voltage

Display: 3 digit LCD max. reading of 1999 with annunciators

Measuring ranges: DC voltage 0~200V/400V,AC voltage 0~500V (50 or 60Hz)

Over range indication: Blanking of all digits except MSD 1

Low battery indication: “B” mark on LCD readout

Sampling: 2 times/sec.

Data hold indication: “DH” mark on LCD readout

Auto power off: The meter is set to power off mode approx. 10 minutes after the power

switch on.

Withstanding voltage: AC 2200V/1 minute (between rubber probe tip and conductive

rubber holder)

Limitation of circuit voltage: Less than AC/DC 600V

Insulation resistance: 10MΩor more (between rubber probe tip and conductive holder)

Operating temperature: 0℃～40℃, <80% RH

Storage temperature: -10℃～60℃, <70% RH

Power supply: SR-44 (1.55V) x 2 or LR-44 x 2

Battery life:Approx. 60 hours continuous (by LR-44)

Size/Weight: 34(W) x 153(H) x 24(D) mm, approx. 50g

Accessories: Soft case...1, Instruction manual...1, Batteries...2

Accuracy (23℃±5℃, less than 80%RH and at bare terminal)

Range

Resolution

Accuracy

Polarity/Display

ACV

±5%rdg±5dgt

Hot line: voltage, Earth line: no display

DC 200V

DC 400V

0.1V

±5%rdg±5dgt

Positive: +, Negative: -

*Measurement on the coated cable

DC Voltage: Display general approximate value after 30sec. contact.

AC Voltage: Display general approximate value at once.

PANEL FUNCTION

①Sensing tip

②Range switch

③Power switch

④Reset (discharge) switch

⑤Data hold switch

⑥LCD (display)

⑦Conductive holder

⑧Battery cover

⑨Hand strap

⊕

⊖

CAUTION BEFORE OPERATION

* VD-320 is for use with low power lines. Do not use it with high power lines.

* Contact the sensing tip firmly to the object to be measured.

* If VD-320 is used nearby noise generating equipment, or the equipment to be

measured is not grounded, be aware that the display may become unstable or indicate

large errors.

* The conductor in the shielded pipe cannot be measured.

* Always discharge the electrostatic capacity of the sensing tip before measurement.

* For the measurement of the insulated conductor or cable, the measured value may

indicate large errors and more than 30sec. of contact is necessary to get the displayed

value.

METHOD OF MEASUREMENT

DCV Measurement

①Press the power switch to ON.

②Set the range switch to a range appropriate to the object to be measured.

③Discharge the electrostatic capacity of the meter.

Touch to the sensing tip by the fingers of the left hand and hold the unit body by right

hand and press the reset switch as following figure:

Hold the unit body with right hand

When “000” is displayed, release the reset switch.

④Hold the unit body and contact the sensing tip firmly to the conductor or object under

test and read the displayed value.

⑤If you make measurements in a dark place or in a place where it is difficult to see the

readings, use the data hold switch. After measurement, turn the power switch to OFF.

The power is automatically turned to OFF, 10 minutes after the power switch ON.

Examples:

Battery Voltage DC Power Supply

Battery

Display appears

Display will appear by the contrary way

ACV Measurement

①Press the power switch to ON.

②Set the range switch toACV range.

③Discharge the electrostatic capacity of the meter.

④Hold the unit body and contact the sensing tip firmly to the conductor or object under

test and read the displayed value.

If you cannot get the stable reading, touch to the floor or wall with left hand.

Left Hand

Right Hand

Left Hand

Right Hand

(Touch the flame

with left hand)

Touch to the floor or

wall with left hand

Hold the unit body with right hand

⑤If you make measurements in a dark place or in a place where it is difficult to see the

readings, use the data hold switch.

After measurement, turn the power switch to OFF.

The power is automatically turned to OFF, 10 minutes after the power switch ON.

NOTE FOR OPERATION

* In single-phase or three-phase electric circuit, the one of the conductors is earthed.

The earthed conductor cannot be detected. Make measurement with another conductor.

* If the data hold switch was set to ON, the measurement is not operative.

Set the data hold switch to OFF before measurement.

* When making measurement for the extended cord connected with receptacle or when

measuring for insulated conductors, be aware that the display indicates lower value.

REPLACEMENT OF BATTERY

When the battery becomes exhausted or drops below the operating voltage, “B”mark is

displayed. Turn the power switch to OFF prior to installing batteries.

To install batteries, remove the battery cover

located on the unit back.

Insert the two LR-44 or SR-44 into the battery

Case making sure that proper polarity is observed.

Always replace both batteries at the same time.

If the difference between the voltage of the batteries is

big, the measurement error may be caused. Set + side to the upper

WARRANTY

This instrument is sent out from our factory after the sufficient internal inspections

but if you find any defect due to the fault in our workmanship or the original parts,

please contact the dealer where you bought the instrument.

The warranty period is 12 months from the date of purchase and the instrument shall be

repaired at free of charge, provided that we judge the cause of defect is obviously resulted

from our responsibility.

MULTI MEASURING INSTRUMENTS CO.,LTD.

Akihabara Murai Bldg. 7F, 1-26 Kanda Sakuma-cho,

Chiyoda-ku, Tokyo, 101-0025 Japan

TEL : +81-3-3251-7016 FAX : +81-3-3253-4278

Home Page : http://www.multimic.com/

E-mail : multi@multimic.com

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