Multi VD-1000 User manual

DIGITAL VOLTAGE CHECKER
MODEL VD-1000
INSTRUCTION MANUAL
Thank you very much for selecting our voltage checker model VD-1000.
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 for AC/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 25V AC 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 AC/DC 1000V.
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/1000V, AC voltage 0~1000V (50Hz)
Over range indication: Blanking of max. digit “1” (except for ACV, DC1000V ranges)
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 1000V
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
1V
±5%rdg±5dgt
Hot line: voltage, Earth line: no display
DC 200V
DC 1000V
0.1V
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
24

⊕
⊖
CAUTION BEFORE OPERATION
* VD-320 is for use with low voltage lines.Apply this model in the circuit less than 1000V.
* 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 : [phone] FAX : [phone]
Home Page : http://www.multimic.com/
E-mail : [e-mail]