Velleman DCM97K Manuel utilisateur

DCM97K version 2

versie 2

version 2

Separable Meter :

Digital Multimeter & AC Current Transducer

Afneembare Meter :

Digitale Multimeter & AC Stroomtang

Mètre séparable :

multimètre numérique & pince ampèremétrique CA

User Manual

Gebruikershandleiding

Manuel d'Utilisation

DCM97K v2 GB

DCM97K -- Separable Meter :

Digital Multimeter (DMM) & AC Current Transducer

1.INTRODUCTION

Thank you for buying the DCM97K ! We

are confident that this multifunctional

device will serve you well for many

years to come.

This is a separable meter consisting of

a digital multimeter (DMM) and an AC

current transducer. The DMM can be

used individually for DC & AC voltage

measurements and for measuring

resistance, diodes and continuity. The

meter can be used to measure AC

currents when the AC current

transducer is mounted firmly on the

DMM.

The multimeter has been designed in

accordance with IEC-1010 concerning

safety requirements for electrical

measuring instruments and hand-held

current clamps.

See figure 1.

AC CURRENT

TRANSDUCER

DMM

FIGURE 1

DCM97K v2 GB

PART 1 : THE DIGITAL MULTIMETER (DMM)

1.SAFETY INFORMATION

This multimeter has been designed in accordance with UL1244 and IEC-1010

concerning safety requirements for electronic measuring instruments with an

overvoltage category (CAT II) and pollution 2.

Follow all safety and operating instructions to ensure that the meter is used safely

and is kept in good working order.

1.1. Preliminary

The user should observe all standard safety rules :

lDo not abuse the device.

lFull compliance with safety standards can be guaranteed only if the device is

used with the supplied test leads. If necessary, they should be replaced with

identical leads or leads with identical electronic ratings. All measuring leads

should be in good condition.

1.2. Use

lObserve a warm-up delay of at least 60 seconds.

lThe display may become unstable and the readings inaccurate if the multimeter

is used in the vicinity of noise-generating equipment.

lNever exceed the limit values of the various measurement ranges as indicated

in this manual.

lDisconnect all test leads from circuits that are currently being tested before

selecting a different function.

lNever perform resistance measurements on live circuits.

l Always be careful when working with voltages in excess of 60VDC or 30Vrms

AC.

l Keep your fingers behind the probe barriers while using the device.

1.3. Symbols

Important safety information, consult the manual.

Earth ground

Double insulation (Protection Class II)

DCM97K v2 GB

FIGURE 2

1.4. Maintenance

lAlways disconnect the test leads from energised circuits before opening the

housing or the battery compartment.

lRefrain from using the device and have it repaired by qualified personnel in

case of malfunction.

lDo not use the meter unless the back panel and the battery cover are in place

and securely fastened.

lUse a damp cloth and mild detergent for cleaning purposes. Never apply

abrasives or solvents to the meter.

2.DESCRIPTION

This meter is a professional auto-ranging

measuring instrument. Consult figure 2 and

read the explanation for the various numbered

controls in order to familiarise yourself with the

functions and keys of the front panel.

Digital Display

All measured values are displayed on an

LCD with 3200 points. The device is

equipped with a 33-segment analogue bar

graph. The device provides an automatic

polarity indication, decimal point, AC & DC

range indication, unit indicators, MΩor KΩ

or Ωand various symbols : , ,

," ".

óFunction Switch ("FUN.")

Used to select the desired function and

range.

ì"COM"-input Terminal

Ground input connector.

ö"V-Ω"-input Terminal

Positive input connector for measuring

tension, resistance and diodes.

ú"RAN."-key (Manual Range)

Push this key to select the manual range selection mode or to change ranges.

Push the RANGE key once to make the RANGE indicator appear on the LCD.

DCM97K v2 GB

Push the RANGE key again to select the desired range. Hold the RANGE key

for two seconds in order to return to the autoranging mode.

÷"FUN."-key

Push the blue "FUN."-key to alternate between AC & DC voltage measurement

if the device is in the in the voltage mode. Push the key to alternate between

resistance, continuity or diode measurement if the device is in the Ω

mode.

ø"Hold"-key " "

This key is used to freeze the measured value for all functions. The " " symbol

is displayed when this function is used. Measurements are still performed but

the display is not updated.

í Back Light Key

This key is used to activate the back light. The light is deactivated automatically

after approx. 5 seconds. Press the key again to reactivate the back light.

3.SPECIFICATIONS

Max. accuracy is achieved during a one-year period after calibration, at a

temperature of 18 to 28°C (64°F to 82°F) and a max. relative humidity of 80%.

3.1. General Specifications

Max. Voltage between

Terminals and Earth : 600VDC or 600Vrms AC (sine wave)

Max. Altitude : 2000m

Installation Category : CAT II 600V

Pollution Degree : Level II

Power Supply : 2 x 1.5V AAA-batteries of the IEC LR03 type

Display : LCD, 3200 points, 33-segment bar graph

Ranging Method : Auto / manual

Overrange Indication : "OL" or "-OL"

Polarity Indication : "-" displayed automatically

Battery-Low Indication : " " is displayed

Operating Temperature : 0 to 50°C (32 to 122°F)

Storage Temperature : -10 to 60°C (14 to 140°F)

Temperature Coefficient: 0.15 x (specified accuracy)/°C, <18°C or >28°C

Dimensions : 54 (W)x 165 (L) x 28 (H) mm

Weight : 120g

Auto Power-Off : Approx. 10 minutes

DCM97K v2 GB

3.2. DC voltage

Range Resolution Accuracy

300mV 100µV

3V 1mV

30V 10mV

300V 100mV

600V 1V

±0.7% of rdg -- 2 digits

Input Impedance : 10MΩ

Overload Protection : 600VDC or 600Vrms AC

3.3. AC voltage

Range Resolution Accuracy

3V 1mV

30V 10mV

300V 100mV

600V 1V

±0.8% of rdg -- 3 digits

Input Impedance : 10MΩ

Frequency Response : 40Hz - 400Hz, 40Hz - 200Hz for the 3V-range

Overload Protection : 600VDC or 600Vrms AC

3.4. Resistance

Range Resolution Accuracy

300Ω0.1Ω

3KΩ1Ω

30KΩ10Ω

300KΩ100Ω

3MΩ1KΩ

±1.2% of rdg -- 2 digits

30MΩ10KΩ±2.0% of rdg -- 5 digits

Overload Protection : 250VDC or 250Vrms AC

Open-Circuit Voltage : approx .1.3V

DCM97K v2 GB

3.5. Diode and Audible Continuity Test

Range Description Test Condition

Display reads approximate

forward voltage of diode Forward DC current

approx. 1.5mA.

Reversed DC voltage

approx. 3V

Built-in buzzer sounds if

resistance < approx. 30ΩOpen-circuit voltage

approx. 1.3V

Overload Protection : 250VDC or 250Vrms AC

3.6. Auto Power Off

The meter will automatically deactivate when not used for approx. 10 minutes.

Push the "RAN." key to reactivate the meter.

4.OPERATION

4.1. Voltage measurements

1.Connect the red test probe to the "V-Ω" input terminal and the black test lead to

the "COM" terminal.

2.Place the function switch in the " " position.

3.Push the blue "FUN."-key until the VAC or VDC function is reached.

4.Connect the test probe and the lead to the source to be tested.

WARNING

Do not attempt to measure voltages that might exceed 600VDC or 600VAC in

order to avoid electroshocks or damage to the meter. Do not apply more than

600VDC or 600Vrms AC between the "COM" input terminal and the earth.

NOTE

The display may become unstable, especially when working in the 300mV-range,

even if you do not connect the test probe with the circuit. Short the "V-Ω" terminal

and the "COM" terminal and make sure the zero is displayed if you suspect that a

particular reading is erroneous.

DCM97K v2 GB

4.2. Resistance Measurement

1.Connect the red test probe to the "V-Ω" terminal and the black test lead to the

"COM" terminal.

2.Place the function switch in the "Ω" position and use the "FUN."-key to

select resistance measurement.

3.Make sure that the tested device is not under tension in order to ensure a

correct reading.

4.Connect the test leads to the resistor to be measured. Short the test leads prior

to performing your measurements in order to obtain maximum accuracy when

measuring low resistance values. Memorise the displayed value and, if

necessary, subtract the displayed value from the result of the measurement.

NOTE

1.The device may need a few seconds to produce a stable reading when

performing measurements in the 30MΩ-range. This is normal when high

resistances are being measured.

2.The overrange indication "OL" will be displayed if the input is not connected,

e.g. with an open circuit.

4.3. Continuity Test (buzzer)

1.Connect the test probe to the "V-Ω" terminal and the black test lead to the

"COM" terminal.

2.Place the function switch in the "Ω" position and use the blue "FUN."-

key to select the continuity function.

3.Connect the test probe and the lead to the circuit to be measured. The buzzer

will sound if the resistance of the circuit < 30Ω.

4.4. Diode Test

1.Place the function switch in the "Ω" position and use the "FUN."-key to

select the diode function.

2.Connect the black test lead to the "COM" terminal and the red probe to the "V-

Ω" input terminal.

3.Connect the red test probe to the anode and the black lead to the cathode of

the diode. The meter will display the approx. forward voltage of the diode. Only

"OL" will be displayed if the lead connection is reversed.

DCM97K v2 GB

4.5. Current Measurements

See part two.

5.ACCESSORIES

lAC current transducer

lTest lead (black)

lTest probe set

lAlligator clip (black)

l User manual

l 2 x 1.5V-battery

6.BATTERY REPLACEMENT

The batteries need to be replaced when the " "-sign appears on the LCD.

Remove the screws of the battery cover and open the cover. Replace the old

batteries with two new 1.5V-batteries (supplied).

Note : Please observe all applicable laws when disposing of your old batteries.

WARNING

Make sure that all test leads have been disconnected from the circuit to be

measured before opening the battery cover in order to avoid the risk of

electroshocks.

DCM97K v2 GB

FIGURE 3

PART 2 : THE AC CURRENT TRANSDUCER

1.SAFETY INFORMATION

The AC current transducer has been designed in accordance with IEC1010

concerning safety requirements for hand-held current clamps.

Use the device safely and keep it in good working order by following the

instructions in this manual.

1.1. Symbols

2.DESCRIPTION

2.1. Front View

Consult fig. 3 and follow the procedure outlined below to familiarise yourself with

the AC current transducer.

 Transformer jaws

Designed to pick up the AC current

flowing though the conductor.

ó Hand guard

Designed to protect the user.

ì Trigger

Press the lever to open the jaws.

Important safety information, consult the manual.

Double insulation (Protection Class II).

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