Yokogawa CW10 Operating Manual

User’s Manual

CW10

クランプ電力チェッカ

Clamp-on Power Meter

保証書付

この取扱説明書は、いつでも使用できるよう 大切に保管してください。

Store this manual in an easily accessible place for quick reference.

IM CW10-JA: Japanese IM CW10-EN: English

5th Edition: April 2015 (YMI)

Regarding the Safe Use of This Product

When operating the instrument, be sure to observe the cautionary notes given below to ensure correct and safe use of the instrument. If you use the instrument in any way other than as instructed in this manual, the instrument’s protective measures may be impaired. YOKOGAWA is by no means liable for any damage resulting from use of the instrument in contradiction to these cautionary notes.

The following safety symbols are used on the instrument and in this manual.

Danger! Handle with Care. This symbol indicates that the operator must refer to an explanation in the User’s Manual in order to avoid risk of injury or death of personnel or damage to the instrument.

Hazardous Voltage This operator must never attempt to touch equipment or

parts marked with this symbol.

This symbol indicates double insulation or reinforced

insulation.

This symbol indicates direct current (DC).

This symbol indicates aiternating current (AC).

This symbol indicates ground (earth).

This symbol indicates a battery.

This symbol indicates that this instrument designed to be

applied around or removed from HAZARDOUS LIVE conductors provided if the RATED circuit-to-earth voltage dose not exceed the value indicated in the measurement category.

This symbol indicates, If the measured voltage is

greater than 30 V DC or AC RMS or Overload (OL or –OL).

Indicates a hazard that may result in the loss of life or serious injury of the user unless the described instruction is abided by.

Indicates a hazard that may result in an injury to the user and/or physical damage to the product or other equipment unless the described instruction is abided by.

Always observe the following instructions. Failure to do so may result in electrical shock or other dangers that may lead to serious injury or the loss of life.

• The instrument is a power measurement instrument that can measure parameters such as voltage, current, and power. Do not use this instrument for any other purpose.

• Do not use the instrument if there is a problem with its physical appearance.

• Do not use the instrument in an atmosphere where any ammable or explosive gas is present.

• To avoid a short-circuit or an accident to personnel, use this instrument within the RATED circuit-to-earth voltage, maximum input voltage and current.

• Avoid using the instrument if it has been exposed to rain or moisture or if your hands are wet.

• Barrier is for to avoid touching the HAZARDOUS LIVE conductor. Be careful not to across the Barrier when using the instrument.

• Do not use the instrument if there is any damage to the casing or

when the casing is removed.

• Use the test leads supplied by Yokogawa with this instrument.

• Do not use test leads that have deteriorated or are defective.

• Check the test leads continuity.

• When you attach or remove the test leads or remove the case

(for example to charge the battery), be sure to remove the test leads from the circuit under measurement.

• When you remove the case (for example to change the battery), be sure to remove the test leads from the instrument.

• Safety protectors such as rubber-insulated gloves should be worn to prevent electrical shock when using the instrument.

• There are caps at the ends of the test leads. To ensure safety (safety standard EN 61010-031), be sure to put the caps on the leads when you use them.

• No person, except personnel from Yokogawa, is authorized to disassemble this instrument. Do not attempt to repair/modify the instrument yourself, as doing so is extremely dangerous.

• The product is for domestic use (Class B) and meets the electromagnetic compatibility requirements.

• Do not use the instrument near noise-emitting equipment or where there may be sudden changes in temperature. Otherwise, the instrument may produce an unstable readings or errors.

• Do not wipe the instrument using an organic solvent. When cleaning the instrument, use a dry cloth.

• Do not leave the tester exposed to direct sunlight or in a hot and humid location such as the inside of a car, for any prolonged length of time.

• If the instrument will not be used for long periods, remove the battery.

Contents

Regarding the Safe Use of This Product.......................1

1. Checking the Contents of the Package .................... 4

2. Measurement Category ................................ 4

3. Components.........................................5

4. Display (LCD)........................................6

5. Power ON/OFF and Auto power off .......................6

6. Cursor/ENTER key....................................6

7. Making Basic Measurements ............................7

7.1 Measuring Voltage ...............................7

7.2 Measuring Current ............................... 7

8. Others Function ...................................... 8

8.1 AUTO SENSE...................................8

8.2 RANGE ........................................ 8

8.3 Peak Hold (AC mode only) .........................9

8.4 Inrush current (AC mode only) ..................... 11

8.5 DCA ZERO .................................... 12

8.6 Measuring Frequency Hz (AC mode only) ............ 12

8.7 MAX/MIN......................................13

8.8 Harmonic Measurement (AC mode only) .............13

8.8.1 THD Measurement..........................13

8.8.2 Individual Harmonic Mesurement .............. 14

8.9 Low pass filter (AC mode only) ..................... 14

8.10 Measuring Active Power ..........................15

8.10.1 Single phase 2 wire ......................... 15

8.10.2 3 phase 3 wire (balanced/unbalanced) .......... 16

8.10.3 3 phase 4 wire (balanced/unbalanced) .......... 16

8.10.4 Phase Rotation.............................17

8.11 Mesuring Resistance.............................19

8.11.1 Resistance (Ω) .............................19

8.11.2 Continuity Check ........................... 20

8.11.3 Diode Test.................................20

8.12 HOLD ........................................ 20

8.13 Voltage Sanse..................................20

8.14 Buzzer........................................21

8.15 Additional Power-on Function ......................21

9. Battery State display and Battery Replacement .............21

9.1 Battery State display .............................21

9.2 Bayttery Replacement ............................21

10. Specifications .......................................22

10.1 General Specifications ........................... 22

10.2 Accuracy ......................................23

11. Maintenance and After-Sales Service ....................26

12. Sales in Each Country or Region ........................ 26

12.1 Disposing the Product............................26

12.2 How to Replace and Dispose the Batteries............26

12.3 Authorized Representative in the EEA ............... 26

12.4 For the Pollution Control of Electronic and Electrical Products of the People's Republic of China ... 27

1. Checking the Contents of the Package

After opening the package, be sure to check the product as instructed below before use.

1. Main Unit: CW10 (including battery)

2. Test leads: 1set (Black and Red)

3. User’s Manual

4. Soft Case

2. Measurement Category

When you use the test leads, attach or remove the caps according to the measurement category.

CW10 main unit:

1000V CAT III, 600V CAT IV

Test leads:

With Caps: 1000V 10A CAT III, 600V 10A CAT IV Without Caps: 1000V 10A CAT II

Measurement

Category

O None Other

CAT II

CAT III

CAT IV

Description Remarks

Other circuits that are not directly connect to MAINS.

For measurement performed on circuits directly connected to the low-voltage installation.

For measurement performed in the building installation.

For measurement performed at the source of the low-voltage installation.

Circuits not connected to a mains power source.

Appliances, portable equipment, etc.

Distribution board, circuit breaker, etc.

Overhead wire, cable systems, etc.

3. Components

10.Terminals of test leads

4.Barrier

CW10

Test leads

7.Open/

close lever

1.Jaw section

2.Light

3.Voltage sense LED

5.Hold and Zero key

6.Function switch

8.LCD display

9.Cursor/ Enter key

Caps of Test leads

Main Unit: CW10

Black

1. Is a precision sensor for detecting currents.

2. When the jaws are open, the light will illuminate.

3. In case voltage is detected by the jaw, the red LED lights up.

4. Prevents contact with the wires.

5. Retains the measured data or DCA ZERO: Zero adjustment

6. Use this switch to turn the power on and off and to select the measurement mode.

7. Opens and closes the jaws.

8. LCD display

9. Cursor and Enter key

10. Input terminals for test leads

[NOTE]

There is the mark on the terminal, but this device does not have a function for measuring capacitance.

Red

4. Display (LCD)

LEFT

5. Power ON/OFF and Auto power off

Check that the meter operates normally.

Turn the function switch to the measurement (any) position from OFF. To end measurement, turn the function switch off.

Indication: This instrument automatically turns off about 15 minutes after the last switch operation.

APO

Recovering the Auto power off function:

Turn off the power. Turn on the power.

When the function is not use (cancellation):

Turn off the power. Hold down Downward of cursor key, turn the function switch to any position. (The APO display goes off.) If the instrument is used with the Auto power off function cancelled, take care not to let the battery run down.

6. Cursor/ENTER key

RIGHT

ENTER

DOWN

Cursor key: Moves the Cursor (four directions) to the item (mode)

ENTER key: Confirms the item (mode).

of display you wish select. Press the convex key toward selecting mode.

[NOTE]

Push whole key toward requisite item. Push down the center position of key to confirm (ENTER key).

7. Making Basic Measurements

Test leads

7.1 Measuring Voltage

Do not apply more than 1000 VDC or 1000 Vrms (1414.2 Vpk).

Plug the test leads to the input terminals.

[NOTE]

When connecting the test leads to the circuit under measurement, connect the black (common) before connecting the red (live); when removing the test leads, remove the red (live) before removing the black (common).

Turn the function switch to the Voltage position. Read the voltage value of display. On Auto Sense mode, the CW10 automatically detects AC or DC.

Black

Red

7.2 Measuring Current

• Do not apply more than 600 ADC or 600 Arms (848.5 Apk).

• When you measure the current, be sure to remove the test leads

from the instrument.

Squeeze the open/close lever to open the jaws. Insert a wire from the measurable conductors under the test though the jaws, making sure the tops of the jaws are tightly shut.

Turn the function switch to the Current Read the current value of display.

Using Auto Sense mode, the CW10 automatically detects AC or DC.

position.

[NOTE]

• When performing a measurement, hold the instrument so that the measured conductor cable runs at the center of the clamp.

• Ensure that the orientation of the clamp to the direction of the conductor wire is correct as shown right.

8. Others Function

8.1 AUTO SENSE

Using Auto Sense mode, the CW10 automatically detects AC or DC. (The detection is determined by whichever input is greater.) To select manual mode (Example: DC mode); Use the cursor key to select under “DC” (flash) and then press the ENTER key to confirm. Upper “DC” indication is fixed and AUTO (AUTO RANGE) is displayed. To return AUTO SENSE, press the ENTER key for more than 2 seconds.

8.2 RANGE

To select manual range (fixed); Use the cursor key to select “RANGE” and then press the ENTER key to confirm. (To cancel manual range, press the ENTER key for more than 2 seconds.) Example: ACV 100 V range

1000 V range

← →

ENTER

On Auto sense mode, the measuring range is automatic.

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