Kyoritsu 2431 Digital Ac Leakage Clamp Meter Instruction Manual

2431 Digital AC Leakage Clamp Meter

Product Information:

Product Usage Instructions:

Before using the instrument, please read through these operating
instructions carefully.

Safety Instructions:

• The instrument has been designed and tested according to IEC
  Publication 61010. It is important to observe the warnings and
  safety rules provided in the instruction manual for safe operation
  and to retain the instrument in a safe condition.
• The symbol indicated on the instrument means that the user must
  refer to related parts in the manual for safe operation.
• Pay attention to the symbols used on the instrument and in the
  instruction manual to ensure your safety.
• Refer to the instruction manual whenever this symbol is marked
  to avoid personal injury or instrument damage.

Specifications:

Note: The table provided above contains additional
specifications. Please refer to the complete user manual for
detailed information.

Usage Guidelines:

• Ensure that the instrument is used indoors and at altitudes up
  to 2000m.
• Data hold function is available for all ranges.
• Storage temperature should be between 10-50°C with a relative
  humidity of up to 75% without condensation.
• Operating temperature should be between 0-40°C with a relative
  humidity of up to 85% without condensation.
• The instrument is powered by two LR-44 or SR-44 batteries. The
  approximate battery life is 15 hours in continuous use.
• The instrument will automatically power off approximately 10
  minutes after power-on.
• The instrument complies with safety standards IEC 61010-1 CAT.
  300V, IEC 61010-2-32, and EMC standard IEC 61326.
• The instrument can withstand overload of AC300A for one minute
  and has a withstand voltage of 3700V AC for 1 minute between the
  electrical circuit and housing case.
• The instrument can clamp on bare conductors when measuring a
  voltage corresponding to the applicable Measurement category, which
  is marked next to the symbol indicating this capability.

Note: For detailed usage instructions and other important
information, please refer to the complete user manual.

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This instrument has been designed and tested according to IEC Publication 61010; Safety Requirements for Electronic Measuring Apparatus.This instruction manual contains warnings and safety rules which must be observed by the user to ensure safe operation of the instrument and retain it in safe condition. Therefore, read through these operating instructions before using the instrument.
*Read through and understand instructions contained in this manual before starting using the instrument. * Save and keep the manual handy to enable quick reference whenever necessary. * Be sure to use the instrument only in its intended applications and to follow measurement procedures described in the manual. * Be sure to understand and follow all safety instructions contained in the manual. Failure to follow the above instructions cause injury, instrument damage and/or damage to equipment under test.
The symbol indicated on the instrument means that the user must refer to related parts in the manual for safe operation of the instrument. Be sure to carefully read instructions following each symbol in this manual.
is reserved for conditions and actions that are likely to cause serious or fatal injury. is reserved for conditions and actions that can cause serious or fatal injury. is reserved for conditions and actions that can cause injury or property damage.
Following symbols are used on the instrument and in the instruction manual. Attention should be paid to each symbol to ensure your safety.
Refer to the instructions in the manual. This symbol is marked where the user must refer to the instruction manual so as not to cause personal injury or instrument damage.
Indicates an instrument with double or reinforced insulation.
Indicates that this instrument can clamp on bare conductors when measuring a voltage corresponding to the applicable Measurement category, which is marked next to this symbol.
Indicates AC (Alternating Current).

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* Digital clamp meter designed for measurement of AC leakage current. * Tear-drop-shaped jaws for ease of use in crowded cable areas and
other tight places * Data hold function to allow for easy readings in dimly light or hard-to-
read locations * Filter function to remove harmonics generated by such equipment as
inverters * Automatic power-off function to extend battery life * Designed to CAT. 300V and pollution degree specified by the
international safety standard,IEC 61010-1.

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Accuracy

Ranges

Frequency Selector Switch

20A 200A

WIDE position

50/60 position

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0100.0A

200A

100.1 199.9A

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Overrange Indication

‘1’ flashes on the highest digit

Response Time

Approx. 2 seconds

Sample Rate

Twice per second

Location for use

Indoor use, Altitude up to 2000m

Data Hold

For all ranges

Storage Temperature & Humidity 10-50^, relative humidity up to 75%without condensation

Operating Temperature & Humidity0-40^, relative humidity up to 85%without condensation

Power Source Current Consumption Battery Life
Auto Power Off Safety Standards EMC Standards Overload Withstand Voltage
Conductor Size Dimensions/ Weight Accessories
Options

Two LR-44 or SR-44 batteries
Approx. 5mA
Approx. 15 hours in continuous use
Automatically turns off approx. 10 minutes after power-on.
IEC 61010-1 CAT. 300V IEC 61010-2-32 IEC 61326
AC300A for one minute 3700V AC for 1 minute between
electrical circuit and housing case
Approx. 24mm in diameter
149L60W26Dmm Approx.120gbattery included Instruction Manual, Two LR-44
batteries Carrying Case
Model 8004, 8008Multi-Tran

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* Never use the instrument on a circuit above 300V AC.
* The transformer jaws are made of metal and their tips are not insulated. Be especially careful about the hazard of possible shorting where equipment under test has exposed conductive parts.
* Do not attempt to make measurement with the battery compartment cover removed from the instrument.
* Keep your fingers and hands behind the barrier during measurement.

* Never make measurement on a circuit above 300V AC. The instrument is designed for measurement on a low-voltage circuit below 300V AC.
* Do not attempt to make measurement in an explosive atmosphere(i.e. in the presence of flammable gasses or fumes, vapor or dust).
* The transformer jaws are made of metal and their tips are not insulated. Be especially careful about the hazard of possible shorting where equipment under test has exposed conductive parts.
* Never attempt to use the instrument if the instrument or your hand is wet.
* Do not exceed the maximum allowable input value of any measurement range.
* Never open the battery compartment cover when making measurement.
* Never try to make measurement if any abnormal conditions, such as broken Transformer jaws or case is noted.
* The instrument is to be used only in its intended applications or conditions. Otherwise, safety functions equipped with the instrument doesnt work, and instrument damage or serious personal injury may be caused.
* Never attempt to make any measurement if the instrument has any structural abnormality such as cracked case and exposed metal part.
* Do not install substitute parts or make any modification to the instrument. Return the instrument to Kyoritsu or your distributor for service and repair to ensure that safety features are maintained.
* Always switch off the instrument before opening the battery compartment cover for battery replacement.
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Working voltage is specified according to each Measurement category, which is defined in safety standards. It is to protect the user from transient impulse, which presents in the circuit under test. Measurement categories are defined as follows.
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Unit of measured quantity

* The transformer jaws, especially their tips, have been precisely adjusted to obtain maximum accuracy. Take sufficient care to avoid shock, vibration or excessive force when handling the instrument.
* The transformer jaws do not fully close when a foreign substance is stuck in the jaw tips or they do not properly engage due to the excessive force applied. In such a case do not release the jaw trigger suddenly or attempt to close the transformer jaws by applying external force. Make sure that the jaws close by themselves after removing the foreign substance or making them free to move.
* The maximum size of a conductor to test is approx. 24 mm in diameter. An accurate measurement cannot be made when the transformer jaws are not fully closed on a conductor larger than 24mm.
* When measuring a large current, the transformer jaws may buzz. This is not a fault nor affect the accuracy of the instrument.
1 Set the range switch to a desired range. (Make sure that current to measure does not exceed the upper limit of the range.)
2 For normal measurement(Fig.1), press the jaw trigger to open the transformer jaws and clamp onto one conductor only. Earth leakage current and small current that flow through a grounded wire can also be measured by this method. It is recommended that the conductor is placed at the center of the closed transformer jaws.

Fig. 1

Normal Measurement

3To measure out of balance leakage current Fig.2, clamp onto all conductors except a grounded wire. The leakage current measured
will be indicated on the display.

Three-phase, 3-wire systems
In a 4-wire system, clamp onto all 4 wires.

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In a 3-wire system, clamp onto all 3 wires.

Fig.2 Out-of-balance Leakage Current Measurement

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AC current to measure may have harmonics or high frequency components generated by such equipment as inverters. To eliminate these superimposed components and measure only the fundamental frequency of 50Hz or 60Hz, Model 2431 has a high-cut filter circuit, which can be activated by setting the frequency selector switch to the ’50/60Hz’ position.
The high-cut filter has a cut-off frequency of 100Hz and an attenuation characteristics of approx. -24dB/octave. When the filter is disabled, ‘WIDE’ is shown on the display. Pressing the frequency selector switch enables the filter, indicating ’50/60Hz’ on the display. Press the switch again to exit the ’50/60Hz’ mode.
Model 2431 Frequency characteristics is as shown below.

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-24/octave means that the magnitude of a signal declines by a factor of 16 when its initial frequency doubles. The frequency selector switch has the following two positions. WIDE40Hz -Covers a wide range of frequency band from mains supply to high frequencies generated by such equipment as inverters. 50/60Hz40 – Approx. 100HzFilter out high frequency components to restrict measurement in mains frequency band.
Recently there has been increased usage of power through inverters, switching regulators, etc. When high frequency noise from such appliances leaks or flows into the ground through capacitors not filtering completely, the earth leakage breaker may trip. In such a case, the instrument may not give current readings with the frequency selector switch set to the 50/60Hz mode. Therefore, when in doubt as to the presence of high frequencies or harmonics that affect AC leakage current measurements, take current readings with the switch set to the 50/60Hz and WIDE modes respectively and then compare the results obtained

1Push the Data Hold switch to freeze the reading. The ‘H’ symbol is shown on the display, indicating that the instrument is in the Data Hold mode.
2 Push the switch again to exit the Data Hold mode.

In approx. 10 minutes after it is turned on, Model 2431 automatically turns power off and the display goes off. To exit the power-off state, turn the range switch to the OFF position, then back to any desired range.

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When the display blanks or symbol “BATT” appears in the left lower corner of the display, replace the batteries.
Never replace the batteries while making measurement.
1Set the range switch to the OFF position. 2Press in the hole on the battery compartment cover with the tip of a
pointed object, then slide open the cover. 3Replace the two batteries with new ones, observing correct
polarity. Replacement batteries should be type LR-44 or SR-44. 4Slide the battery compartment cover in place.

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These Multi-Trans cannot be used for leakage current measurement.

Transformer Jaws 1Set the range switch of
MODEL 2431 to a desired
range.

2As shown in the figure on the right, open the transformer jaws of MODEL 2431 and close them over the pickup coil of MODEL 8004 or 8008 Multi-Tran.

Conductor

3Clamp the Multi-Tran onto the bus-bar or conductor
under test.

4Take the reading on MODEL 2431 and multiply
it by 10.

Pickup Coil

Model Maximum Conductor Size

Range

Multiplication Factor

8004

60mm in diameter 01000A AC

101

8008 100mm in diameter 03000A AC

101

*Up to 2000A when used with MODEL 2431. For more information, see the instruction manual for MODEL 8004 or 8008.

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