User's
Manual
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: 81-42-534-1413, Facsimile: 81-42-534-1426
YOKOGAWA CORPORATION OF AMERICA (U.S.A.)
Phone: 1-770-253-7000 Facsimile: 1-770-251-2088
YOKOGAWA EUROPE B. V. (THE NETHERLANDS)
Phone: 31-334-64-1611 Facsimile: 31-334-64-1610
YOKOGAWA ENGINEERING ASIA PTE. LTD. (SINGAPORE)
Phone: 65-6241-9933 Facsimile: 65-6241-2606
YOKOGAWA AMERICA DO SUL S. A. (BRAZIL)
Phone: 55-11-5681-2400 Facsimile: 55-11-5681-1274
YOKOGAWA MEASURING INSTRUMENTS KOREA CORPORATION (KOREA)
Phone: 82-2-551-0660 to -0664 Facsimile: 82-2-551-0665
YOKOGAWA AUSTRALIA PTY. LTD. (AUSTRALIA)
Phone: 61-2-9805-0699 Facsimile: 61-2-9888-1844
YOKOGAWA INDIA LTD. (INDIA)
Phone: 91-80-4158-6000 Facsimile: 91-80-2852-1441
YOKOGAWA SHANGHAI TRADING CO., LTD. (CHINA)
Phone: 86-21-6880-8107 Facsimile: 86-21-6880-4987
YOKOGAWA MIDDLE EAST E. C. (BAHRAIN)
Phone: 973-358100 Facsimile: 973-336100
LTD. YOKOGAWA ELECTRIC (RUSSIAN FEDERATION)
Phone: 7-095-737-7868 Facsimile: 7-095-737-7869
Printed in Japan
Model 3226
Universal Leakage Current Tester
IM 3226-E
Nov. 2007 5th (KP)
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
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 measure
-
ment.
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 field.
(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.
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 explana-
tion 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 fire.
- 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 flammable or explosive gas atmosphere.
- Do not operate the instrument if there is condensation on it.
Disassembly
- Do not attempt to disassemble the instrument.
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 rectifing, 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
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
PARTS IDENTIFICATION AND FUNCTION
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
Fig. 1 Parts Identification
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 fixing 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
A3
