OPERATION
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 first 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 deflecting.
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 Univer-
sal 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).
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 check-
line 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 C
1
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 sur-
faces 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 measur-
ing 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 sta-
tus, 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 3227
3226
Power plug P1
Power plug
P2
Insulation Table
Appliance to be tested
TEST
S1(POWER)
OFF ON
ON
ON
S2(POLARITY)
connecter
C
1
Ground open
Fig. 2 Connection Diagram
CALIBRATION
1. Instruments necessary for calibration
Instrument
Requirements
YOKOGAWA equivalent
Standard DC power supply
Output: 10 mA
Accuracy: 0.5 %
Model 2552
Standard AC power supply
Output: 10 mA
Accuracy: 0.5 %
Model 2558
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
pointer to the zero point of the scale by using the variable resistor RV2 inside the case.
3 Set the measuring range selector switch to the DC 1 mA position, supply 1 mA from
the standard PC power supply, and adjust the RV1 variable resistor inside the case so
that the meter is showing the full scale.
4 Conduct adjustment in the same manner as above, while the measuring range selector
switch is set to DC 10 mA, AC 1 mA and AC 10 mA positions in sequence. If indica-
tion error is large, test and adjust for the most uniform and highest accuracy of all the
measuring ranges.
5 Repeat the foregoing, with the input resistance set to 1.5 and 2 KΩ in sequence.
SPECIFICATIONS
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
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
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 field
- 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 affixed 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-
sified as a “Monitoring and Control instrumentation” product.
To return unwanted products within the EU area, contact your local Yokogawa
Europe B. V. office.
Do not dispose in domestic household waste.