Yokogawa CL200 Operating Manual

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User’s
Manual

CL220
Clamp-on Tester

IM CL220

Contents

 Precautions for Safety Use of the Instrument

1. Instrument Layout

2. Measurement

2.1 Preparation for Measurement

2.2 DC Current Measurement

2.3 AC Current Measurement

3. Other Functions

3.1 Sleep Function

3.2 Data Hold Function

3.3 Optional Accessories

4. Battery Replacement

5. Specifications

6. Calibration and After-sales Service

2nd Edition: June 2003 (MC)

IM CL220

 Precautions for Safe Use of the Instrument

When handling the instrument, ALWAYS observe all of the cautionary
notes on safety given below. Yokogawa M&C Corporation is not at all
liable for damage resulting from misuse of this product by the user
that is contrary to these cautionary notes.
Various symbols are used on the instrument and in this manual to
ensure the product is used safety and to protect operators and prop­erty from possible hazards or damage. The following safety symbols
are used where appropriate. Read the explanations carefully and
familiarize yourself with the symbols before reading the text.

The instrument and this manual use the following safety symbols:

Danger! Handle with Care.

This symbol indicates that the operator must refer to an ex­planation in the User’s Manual in order to avoid the risk o
personal injury or death and/or damage to the instrument.

Double Insulation

This symbol indicates double insulation.

AC Voltage/Current

This symbol indicates AC voltage or current.

DC Voltage/Current

This symbol indicates DC voltage or current.

AC/DC Voltage/Current

This symbol indicates AC/DC voltage or current.

Ground

Indicates that there is a possibility of serious personal injury or loss of
life if the operating procedure is not followed correctly and describes
the precautions for avoiding such injury or loss of life.

Indicates that there is a possibility of serious personal injury of dam­age to the instrument if the operating procedure is not followed cor­rectly and describes the precautions for avoiding such injury or dam­age.

NOTE

Draws attention to information essential for understanding the opera­tion and features.

This symbol indicates ground (earth)

WARNING

CAUTION

WARNING

● Never make measurement on a circuit above 300V AC/DC.

● Do not use the instrument in an atmosphere where any flammable

or explosive gas is present.

● Do not attempt to make measurement in the presence of flamma­ble gasses, fumes, vapor or dust. Otherwise, the use of the instru­ment may cause sparking, which can lead to an explosion.

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

● Do not exceed the maximum allowabIe input of any measurement
range.

● Never open the battery compartment cover when making meas­urement.

● Do not use the instrument if there is any damage to the casing or
when the casing is removed.

● Do not install substitute parts or make any modification to the in­strument. Return the instrument to Yokogawa M&C or your dis­tributor for repair or re-calibration.

● Always switch off the instrument before opening the battery com­partment cover for battery replacement.

WARNING

To avoid damage to the instrument or electric shock!
The restrictions on the maximum voltage level for which the CL220
testers can be used, depend on the over-voltage categories specified
by the safety standards. These category specifications are formulated
to protect operators against transient impulse voltage in power lines.

Function

A, A

Over-voltage category I (CAT.I):
Signal level, special equipment or parts of equipment, telecommu-

nication, electronic etc., with smaller transient over-voltages than
CAT.II.

Over-voltage category II (CAT.II)
Local level, appliance, portable equipment etc., with smaller tran-

sient over-voltages than CAT.III.

Over-voltage category III (CAT.III):
Distribution level, fixed installation, with smaller transient

over-voltages than CAT.IV.

Maximum Allowable Input

OVERVOLTAGE CATEGORY III

Measuring circuit voltage : 300Vrms AC/300V DC

300Arms AC/300A DC

CAUTION

● Be sure to set the Function Selector switch to the "OFF" position

after use. When the instrument will not be in use for a long period of
time, Place it in storage after removing the battery.

● Use a damp cloth and detergent for cleaning the instrument. Do not
use abrasives or solvents.

NOTE

● Radiation immunity affects the accuracy of CL220 testers under the
conditions specified in EN 61000-4-3: 1997.

● If equipment generating strong electromagnetic interference is
located nearly, the testers may malfunction.

1. Instrument Layout

Open/Close Lever

Transformer Jaws

LCD Display

DC Current

AC Current

Data Hold Button

Low Battery Warning

Negative Sign

Function Selector Switch

Zero ADJ. Button

Safety Hand Strap

Display

Data Hold Mode

Current

2. Measurement

2.1 Preparation for Measurement

CAUTION

● The jaw section is a delicate, precision sensor. Do not subject the
jaw to unreasonably strong shock, vibration, or force when using it.

● If dust gets into the tops of the jaws, remove it immediately. Do not

close the jaws when dust is trapped in its joints as the sensor may
break.

● Please check that the Function Selector switch is set to the desired

position before measurement.

2.2 DC Current Measurement

WARNING

Do not make measurement on a circuit above 300V DC. This may
cause shock hazard or damage to the instrument or equipment under
test.

(1) Set the Function Selector switch to the “

should be shown on the upper left corner of the display.

(2) With the transformer jaws closed and without clamping them onto

the conductor, press the
zero adjust the display.

(3) Press the open/close lever to open the transformer jaws and

clamp them onto the conductor under test, then take the reading
on the display. The most accurate reading will be obtained by
keeping the conductor at the center of the transformer jaws.

NOTE

● During current measurement, keep the transformer jaws fully

closed. Otherwise, accurate measurement cannot be made. The
maximum measurable conductor size is approx. 24mm in diameter.

● When the current flows from the upside (the display side) to the

underside of the instrument, the polarity of the reading is positive
and vice versa. (See the figure at the below light)

Correct

Wrong

button for about one second to

A” position. "DC"

"+" Current

"-" Current

2.3 AC Current Measurement

WARNING

Never use the instrument on a circuit above 300V AC. This may
cause electrical shock hazard and damage to the instrument or the
circuit under test.

(1) Set the Function Selector switch to the "

should be shown on the upper left corner of the display.

(2) Press the open/close lever to open the transformer jaws and

clamp them onto a single conductor and take the reading on the
display. The most accurate reading will be obtained by keeping
the conductor at the center of the transformer jaws.

NOTE

● During current measurement, keep the transformer jaws fully

closed. Otherwise, accurate measurements cannot be taken.
Maximum conductor size is 24mm in diameter.

● Zero adjustment is not necessary in AC current measurement.

There is no polarity in the reading either.

Correct Wrong

A" position. "AC"

3. Other Functions

3.1 Sleep Function

This is a function to prevent the instrument from being left powered on
in order to conserve battery life. This function causes the instrument
to enter the Sleep (powered-down) mode about 30 minutes after the
last switch or button operation.

To exit the Sleep mode, turn the Function Selector switch back to
"OFF", then to any other position, or press any button.

The current is consumed a little in the Sleep mode.

NOTE

If the instrument in the Data Hold mode goes into “sleep”, the Data
Hold function will remain effective when the instrument is powered on
again.

3.2 Data Hold Function

This is a function used to freeze the measured value on the display.
Press the
regardless of subsequent variation in input. "
upper right corner of the display while the instrument is in the Data
Hold mode.

To exit the Data Hold mode, press the

button to freeze the reading. The reading will be held

" is shown on the

button again.

NOTE

If the instrument in the Data Hold mode goes into “sleep”, the Data
Hold function will remain effective when the instrument is powered on
again.

3.3 Optional Accessories

Clamp Adapter Model 99025 (For AC current measurement only)

Clamp Adapter Model 99025 is designed
to increase the measuring capability of a
clamp meter. With the use of the Clamp
Adapter, you can not only extend current
range over 3000A, but also clamp on a
large bus-bar or conductor.

(1) Set the Function Selector switch to

(2) As shown in the figure below, clamp

(3) Clamp Model 99025 onto the bus-bar

(4) Take the reading on Model CL220

NOTE

For the detailed specification, refer to the
Clamp Adapter User’s Manual.

A " position.

the "

Model CL220 onto the pickup coil of
Model 99025.

or conductor under test.

and multiply it by 10.

4. Battery Replacement

WARNING

To avoid electric shock hazard, never try to replace batteries during
measurement.

CAUTION

● Do not mix new and old batteries.

● Make sure to install battery in correct polarity as indicated in

battery compartment.

If the battery voltage becomes too low for the instrument to operate
normally, "
Note that when the battery is completely exhausted, the display
blanks without "

(1) Set the Function Selector switch to the "OFF" position.

(2) Press in the hole on the battery compartment cover with the tip of

a pointed object, then slide open the cover.

(3) Replace the battery observing correct polarity. Use two new LR44

or SR44 batteries.

(4) Slide the battery compartment cover back in place.

Battery compartment cover

" is shown on the display. Then, replace the battery.

" shown.

5. Specifications

Instrument Specifications

Measuring Ranges and Accuracy (at 23±5°C, relative humidity up to 85%)

●

DC Current

Range Measuring Range Accuracy

40A 0 to ±40.00A ±1.0% rdg ±4dgt

300A

AC Current

Range

40A 0 to 40.00A

300A

(Auto-ranging)

±20.0 to ±200.0A ±1.5% rdg ±4dgt
±200.0 to ±300.0A ±3.0% rdg

(Auto-ranging)

Measuring Range

20.0 to 200.0A

200.0 to 300.0A

±1.0% rdg ±4dgt (50/60Hz)
±2.5% rdg ±4dgt (20Hz to 1kHz)
±1.5% rdg ±4dgt (50/60Hz)
±2.5% rdg ±4dgt (20Hz to 1kHz)
±3.5% rdg (50/60Hz)
±4.0% rdg (20Hz to 1kHz)

Accuracy

 General Specifications

● Operating System : Dual integration

● Measurement Function : AC current, DC current

● Display : Liquid crystal display with maximum counts of 4000

● Overrange Indication : "OL" is shown on the display

● Response Time : Approx. 2 seconds.

● Sample Rate : Approx. 2.5 times per second.

● Temperature and Humidity for Guaranteed Accuracy : 23°C ±5°C,

relative humidity up to 85% without condensation

● Operating Temperature and Humidity : 0 to 40°C, relative humidity
up to 85% without condensation

● Storage Temperature and Humidity : -20 to 60°C, relative humidity
up to 85% without condensation

Effect of conductor position : Within ±2.0%rdg ±5dgt of indicated value

●
at the center to a 10 mm-dia conductor, at every part inside the jaws

● Effect of external magnetic field : 1A or less in AC or DC magnetic
field of 400 A/m

● Power Source : Tow LR-44 or SR-44 (3V DC) batteries

● Battery Life : Approx. 100 hours (continuous)

● Current Consumption : Approx. 9mA

● Sleep function : Automatically powered down in approx. 5 minutes

after the last switch operation (power consumption : approx. 20µA)

● Withstanding Voltage : 3700V AC for 1 minute between housing
case and metal part of jaws

● Insulation Resistance : 10MΩ or greater at 1000V between hous-
ing case and metal part of jaws

● Conductor Size : Approx. 24mm diameter max.

● Dimensions : Approx. 59(W) x 147(H) x 25(D) mm

● Weight : Approx. 100g (batteries included)

● Safety Standard: EN 61010-1

EN 61010-2-032

● EMC Standard: EN 61326
EN 55022

● Accessories : LR-44 battery ····························2

● Optional Accessories : Clamp adapter Model 99025

(300V AC/DC CAT. III, Pollution degree2, indoor use)

Carrying case Model 93033·······1
User’s Manual ···························1

6. Calibration and After-sales Service

Should any failure occur while you are using the tester, follow the
instructions given below. If the tester still fails to operate correctly and
needs repair, contact the vendor from whom you purchased the in­strument or the nearest Yokogawa M&C sales office.

● Turn off the POWER switch once, then turn it back on again.

● If the tester does not turn on, replace the battery with a new one.

Calibration
It is recommended that the instrument be calibrated once every year.

YOKOGAWA M&C CORPORATION
International Sales Dept.

2-9-32 Nakacho, Musashino-shi, Tokyo, 180-8750 Japan
Phone: [phone] F acsimile: 81-422-55-8654

YOKOGAWA CORPORATION OF AMERICA (U.S.A.)

Phone: [phone] F acsimile: 1-770-251-2088

YOKOGAWA EUROPE B. V. (THE NETHERLANDS)

Phone: [phone] Facsimile: 31-334-64-1610

YOKOGAWA AMERICA DO SUL S. A. (BRAZIL)

Phone: [phone] Facsimile: 55-11-5681-1274

YOKOGAWA ENGINEERING INSTRUMENTS KOREA CORPORATION (KOREA

Phone: [phone] to -0664 Facsimile: 82-2-551-0665

YOKOGAWA AUSTRALIA PTY. LTD. (AUSTRALIA)

Phone: [phone] F acsimile: 61-2-9888-1844

YOKOGAWA BLUE STAR LTD. (INDIA)

Phone: [phone] F acsimile: 91-80-227-4270

LTD. YOKOGAWA ELECTRIC (RUSSIAN FEDERATION)

Phone: [phone] F acsimile: 7-095-737-7869

)

KIM3E-2003.2