YOKOGAWA 322610, 322710 User Manual

User's

IM3E-2006.2

Yokogawa Meters & Instruments Corporation

International Sales Dept.

Tachihi Bld. No.2, 6-1-3, Sakaecho, Tachikawa-shi,Tokyo 190-8586 Japan
Phone: [phone], Facsimile: 81-42-534-1426

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

Phone: [phone] Facsimile: 1-770-251-2088

YOKOGAWA EUROPE B. V. (THE NETHERLANDS)

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

YOKOGAWA ENGINEERING ASIA PTE. LTD. (SINGAPORE)

Phone: [phone] Facsimile: 65-6241-2606

YOKOGAWA AMERICA DO SUL S. A. (BRAZIL)

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

YOKOGAWA MEASURING INSTRUMENTS KOREA CORPORATION (KOREA)

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

YOKOGAWA AUSTRALIA PTY. LTD. (AUSTRALIA)

Phone: [phone] Facsimile: 61-2-9888-1844

YOKOGAWA INDIA LTD. (INDIA)

Phone: [phone] Facsimile: 91-80-2852-1441

YOKOGAWA SHANGHAI TRADING CO., LTD. (CHINA)

Phone: [phone] Facsimile: 86-21-6880-4987

YOKOGAWA MIDDLE EAST E. C. (BAHRAIN)

Phone: [phone] Facsimile: 973-336100

LTD. YOKOGAWA ELECTRIC (RUSSIAN FEDERATION)

Phone: [phone] Facsimile: 7-095-737-7869

Overload

protective

circuit

Battery

check
circuit

Range

selector

circuit

Input

resistance

selector

circuit

Operating

amplifier

Moving-coil

type DC

milliammeter

200 µA F.S.

Internal

resistance: 121 Ω

B

ACV

B

0

2

4

6

90

180

120

240

150

300

8

10

AC+DCmA ACmA

DCmA

ACV

10

1kΩ

1.5kΩ

2kΩ

INPUT
RESISTANCE

10

10

1

1

1

0.1

0.1

INPUT

0.1

150

300

BATT

ON

OFF

6. Scale plate

7. Carrying
handle

8. Meter cover
fixing screw

9. Meter cover

10. Measuring
range selector
switch

11. Input
terminals

12. Case

1. B mark

2. Spear
pointer

3. Zero
adjuster
screw

4. Input
resistance
switch

5. Power
on-off/battery
check switch

Manual

Model 3226
Universal Leakage Current Tester

Read this user’s manual before using the instrument in order to fully and correctly utilize
all its functions.

Model: 322610 Universal Leakage Current Tester
322710 Test Box

A3

IM 3226-E

Nov. 2007 5th (KP)

GENERAL

Model 3226 is a special milliammeter for measuring leakage current of electrical appli-

ances. The input resistance can be selected from among 1, 1.5 and 2 KΩ for easy measure­ment.
Model 3226 is usable for product inspection on production lines and for experimental
measurement in research and design activities. Model 3227 Test Box is available for the
convenience of measurement.
Model 3226 has the following features:
(1) 4-way function: AC current, DC current, DC + AC current and AC voltage are mea-

surable.
(2) High accuracy: ±2.5% of full scale.
(3) High sensitivity: 0.1 mA for full scale.
(4) TAUT BAND system meter free of friction and strong against vibration and shock.
(5) Overload protective circuit to prevent the meter coil from burning and the meter

pointer from bending

(6) Shielded case to eliminate effect of external high-frequency electric eld.

(7) Compact and lightweight for easy portable use.

SAFETY PRECAUTIONS

When operating the instrument, be sure to observe the cautionary notes given below to
ensure correct and safe use of the instrument. Yokogawa is by no means liable for any
damage resulting from use of the instrument in contradiction to these cautionary notes.

Printed in Japan

Caution

To avoid injury of personnel or damage to the instrument, carefully observe and follow
the cautions listed below:

 Measurement

Do not apply a voltage and current over the allowable limits between the terminals.

 Selector switch

Do not switch the Measuring range selector switch during measurements.

 Batteries

- Do not use different types of batteries together or new and old batteries together.

- If the instrument is not used for a long period, store the instrument with the batteries
removed.

Otherwise, any leakage from the batteries may damage the instrument.

Note

Model 3226 has AC + DCmA range. This is used mainly for the instrument which is

operatedbyDCafterrecting,ACtoDC.Therefore,measuredvalueonthisrangedoes

not indicate RMS value, but the sum of DC and AC components directly.

BLOCK DIAGRAM

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

Warning

Indicates a hazard that may result in the loss of life or serious

injury of the user unless the described instruction is abided by.

Caution

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.

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.

This symbol indicates AC voltage/current.

This symbol indicates a Fuse.

This symbol indicates ground(earth).

Warning

To avoid injury, death of personnel, carefully observe and follow the warnings listed below:

 Measurement

- Do not operate the instrument over 250 V of strong electric circuit.

- Do not touch the Input (Output) terminals, when measuring voltage.

 Measuring lead

- Use the lead supplied by Yokogawa for the instrument concerned.

- Do not use a deteriorated or damaged lead.

- Do not attach/detach the lead to /from the instrument prior to releasing it from the
measured object.

 Protection

-Besuretousethedesignatedfuse(Rating:voltage,currentandtype)topreventre.

- If there are any cracks or other damage in the case because of being dropped or
struck, the instrument may not be safety insulated. Do not use the instrument before
any remedial measures are taken.

 Replacement of batteries or fuse

- Prior to detaching the cover for replacing the batteries or fuse, release the lead from
the measured object and turn off the switch.

 Operating Environment

-Donotoperatetheinstrumentinaammableorexplosivegasatmosphere.

- Do not operate the instrument if there is condensation on it.

 Disassembly

- Do not attempt to disassemble the instrument.

PARTS IDENTIFICATION AND FUNCTION

Fig. 1 Parts Identication

1. B mark: The battery is usable if the meter pointer is within this range when the BATT/ON/OFF

switch is set to the BATT position.

2. Spear pointer

3. Zero adjuster screw: To be turned with a screwdriver for readjusting zero indication of the pointer.

4. lnput resistance switch: Selects one of the three input resistances according to the applicable standard.

5. Power on-off/battery check switch

6. Scale plate: The scale is double graduated in mA and AC V.

7. Carrying handle

8. Metercoverxingscrew

9. Meter cover

10. Measuring range selector switch: To be set to an appropriate position according to the measuring item and

range.

11. lnput terminals: Accessory H-lead is to be connected to the “INPUT” terminal, and L-lead to the “ ”

(ground) terminal.

12. Case

OPERATION

Model 3227

3226

Power plug P1

Power plug
P2

Insulation Table

Appliance to be tested

TEST

S1(POWER)

OFF ON ON ON

S2(POLARITY)

connecter

C1

Ground open

SPECIFICATIONS

Precautions:

1. The most accurate measurement is attained when Model 3226 is placed horizontally.

2. After placing Model 3226 at the position of use, check that the meter pointer coin-

cides with the zero point of the scale, if not, adjust it accurately by turning the zero
adjuster screw.

3. When the approximate value of the leakage current to be measured is unpredictable,

measure by rst setting the measuring range selector switch to the 10 mA position.

4. Before measurement, be sure to check that the measuring range selector switch is
in a position proper for the measurement. Do not operate the switch while the meter

pointer is deecting.

5. When storing of carrying Model 3226 after use, set power on-off/battery check
switch.

When using Model 322710 Test Box:

Warning

Before using this instrument, it is necessary to match the polarity with that of the power
plug. Applying 100 V AC to the cabinet of the appliance to be tested without matching
the polarities may cause an electric shock.

 Matching the polarity

Connect the power cord to the power supply. Turn the power switch to ON and measure
the voltage between the earth and the TEST terminal of this instrument using a Univer­sal leakage voltage tester (3226 or similar).
If the voltage between the earth and the TEST terminal of this instrument is

- AC30 V or less: the instrument can be used;

- More than AC30 V: use the accessory 3-2 pin adapter and reconnect the power plug
opposite (i.e. turning 180 degrees).

Model 322610

Measuring ranges:

DC current: 0.1, 1 and 10 mA
AC current: 0.1, 1 and 10 mA
DC+AC current: 0.1, 1 and 10 mA

AC voltage: 150 and 300 V
(50 or 60 Hz)
Input resistance:

Current measuring range: 1, 1.5 and 2 KΩ

Voltage measuring range: Higher than 100 KΩ

Working frequency range: 20 Hz to 5 kHz
Overload protection: Withstands 30 mA AC for 10 minutes for each current

measuring range.

Effect of temperature: Less than ±0.2%/°C with respect to rated value (within 20

±10°C)

Insulation resistance: Higher than 100 MΩ at 1000 V DC between electric cir-

cuit and case.

Withstand voltage: 1500 V AC (50 Hz) for 1 minute between electric circuit

and case.
Power source: Two 9 V dry batteries 6F22.
Usable for approx: 290 hour.
Outside dimensions: Approx. 190×124×90 mm (7-1/2 × 4-7/8 × 3-9/16”), ex-

cluding carrying handle.
Weight: Approx.1 kg (2.2 lbs)
Accessories: Measuring lead, (B9607GT) 1
Carrying bag (B9646BU)
User’s manual 1

1. Set the power ON–OFF/battery check switch to the “BATT” position and check the
condition of the battery. If the meter pointer is within the battery check-line range, set
the switch to the “ON” position. (If the meter pointer is not within the battery check­line range, remove the back cover and change the batteries.)

2.

Set the measuring range selector switch to ACV position of Model 3226. Connect the
ground terminal of Model 3226 to the TEST terminal of Model 3227, then close switch S1

3. Connect the “INPUT” terminal (H) of Model 3226 to either of the connector C1 of
Model 3227, and measure the power voltage to check that the voltage is as rated.

(If the polarity is opposite, the meter pointer will be zero; in this case use switch S2 to

change the polarity.)

4.

Open switch S1, and connect all the simultaneously accessible exposed conductive sur­faces of the to-be-tested appliance together to the “INPUT” terminal (H) of Model 3226.

5.

Input power plug P2 of the to-be-tested appliance, and turn on all the appliance’s switches.

6. Leakage current is not necessarily only in the AC spectrum, therefore set the measur­ing range selector switch to AC + DC mA range.

7. Close switch S1 of Model 3227, and read the meter of Model 3226. This reading will
tell you the approximate value of the leakage current.

8. Referring to the value obtained in number 7. above, set the range of the ACmA to the
optimum range, and read the meter of Model 3226.

9. Change switch S2 of Model 3227, read the meter of Model 3226, and use the greater
one of the above meter readings as the leakage current value.

10. Set the measuring range selector switch of Model 3226 to the DCmA range, and read
the meter of Model 3226.

11. Repeat the measurement conducted in number 9. above.

12. Start operating the appliance. When the appliance has reached its steady operating sta­tus, measure its leakage current. When not using the Model 3227 Test Box, compose a
circuit similar to that shown in Figure 2 and measure.

Model 322710

Current capacity: 10 A AC (125 V)

Contact resistance: Lower than 0.005 Ω
Insulation resistance: Higher than 100 MΩ at 500 V DC between the electric

circuit and the case.

.

Withstand voltage: 1000 V AC for 1 minute between the electric circuit and

the case.
Outside dimensions: Approx. 70×155×65 mm
Weight: Approx. 0.6 kg
Accessories: 3 to 2 pin adapter

Model 3227 Test Box

CALIBRATION

1. Instruments necessary for calibration

Standard DC power supply Output: 10 mA

2. Procedure

1 Set the input resistance to 1 KΩ by using the input resistance switch of Model 3226.
2 Set the power on-off/battery check switch to the “ON’’ position, and adjust the meter

3 Set the measuring range selector switch to the DC 1 mA position, supply 1 mA from

4 Conduct adjustment in the same manner as above, while the measuring range selector

5 Repeat the foregoing, with the input resistance set to 1.5 and 2 KΩ in sequence.

Fig. 2 Connection Diagram

Instrument Requirements YOKOGAWA equivalent

Model 2552

Accuracy: 0.5 %

Standard AC power supply Output: 10 mA

Accuracy: 0.5 %

Model 2558

pointer to the zero point of the scale by using the variable resistor RV2 inside the case.

the standard PC power supply, and adjust the RV1 variable resistor inside the case so
that the meter is showing the full scale.

switch is set to DC 10 mA, AC 1 mA and AC 10 mA positions in sequence. If indica­tion error is large, test and adjust for the most uniform and highest accuracy of all the
measuring ranges.

MAINTENANCE

For accurate measurement at all times, Model 3226 must be kept in the best condition.
For this purpose, avoid using Model 3226 at a place subject to:

(1) Severe vibration (2) Fill of dust or corrosive gas

(3) Direct sunlight (4) Much moisture

(5) Large variation of ambient temperature (6) Strong external magnetic eld

- Both surfaces of the meter cover are coated with anti-static agent. Do not wipe them

hard or clean them with wet cloth, because such may deteriorate the anti-static effect.
(Use dry, soft cloth, and wipe them lightly with it.)

- The case and meter cover are made of thermoplastic material. Be careful not to touch

them with a soldering iron or other hot object. Do not clean them with a large quantity of
lacquer thinner, benzine or alcohol.

Disposing the Product

Waste Electrical and Electronic Equipment (WEEE)
Directive 2002/96/EC

This Product complies with the WEEE Directive (2002/96/EC) marking requirement.

The afxed product label (see below) indicates that you must not discard this electrical/

electronic product in domestic household waste.

Product Category

With reference to the equipment types in the WEEE directive Annex 1, this product is clas-

sied as a “Monitoring and Control instrumentation” product.

To return unwanted products within the EU area, contact your local Yokogawa

Europe B. V. ofce.

Do not dispose in domestic household waste.