KYORITSU 2413F User Manual

KEWSNAP
Series
KEWSNAP2413F
DIGITALCLAMPMETER
KYORITSUELECTRICALINSTRUMENTS WORKS,LTD.
INSTRUCTIONMANUAL
1.Safety Warnings ………………………………………………………1 2.Features ………………………………………………………………4 3.Specifications …………………………………………………………5 4.Instrument Layout ……………………………………………………9 5.Operation
5−1 Preparation ……………………………………………………11 5−2 AC Current Measurement ……………………………………11 5−3 How to Use Peak Hold Function ……………………………14 5−4 How to Use The Frequency Selector Switch ………………16 5−5 How to Use Data Hold Function ……………………………17
5−6 Analogue Output How to Use Model 7073 Output Cord …17 6.Battery Replacement …………………………………………………19 7.Cleaning ………………………………………………………………20 8.Before Sending For Repair …………………………………………21
―1―
1.SafetyWarnings
Make sure to read through this instruction manual before using this instrument.
The instrument has been designed, manufactured, and tested
according to:
IEC 61010, pollution degree2, CATⅢ, 300V IEC 61010, pollution degree2, CAT, 600
This instruction manual contains warnings and safety rules which must be observed by the use to ensure safe operation of the instrument and to retain it in safe condition.
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 the instruction following each symbol in this manual.
DANGER
is reserved for conditions and actions that are likely to cause serious or fatal injury.
WARNING
is reserved for conditions and actions that can cause serious or fatal injury.
CAUTION
is reserved for conditions and actions that can cause bodily injury or instrument damage.
WARNING
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.
In order to avoid injury, or damage to the instrument or the circuit
under test, be sure to understand and follow all safety instructions contained in the manual.
Be sure to use the instrument only in its intended applications
and to follow measurement procedures described in the manual.
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.
DANGER
Never make measurement on a circuit above 600VAC.
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.
Transformer jaw tips are designed not to short the circuit under
test. If equipment under test has exposed conductive parts, however, extra precaution should be taken to minimize the possibility of shorting.
Never open the battery compartment cover when making
measurement.
Never attempt to use the instrument if its surface or your hand is
wet.
Do not exceed the maximum allowable input of any
measurement range.
Never try to make measurement if any abnormal conditions, such
as broken Transformer jaws or case is noted.
The instrument is be used only in its intended applications or
conditions. Otherwise,Safety functions equipped with the instrument doesn't work, and instrument damage or serious personal injury may be caused.
WARNING
Never attempt to make any measurement if any abnormal
conditions are noted, such as broken case, cracked test leads and exposed metal parts.
Do not install substitute parts or make any modification to the
instrument Return the instrument to Kyoritsu or your distributor for repair or re-calibration.
Do not try to replace the battery if the surface of the instrument is wet.
―2―
―3―
CAUTION
Make sure that the function selector switch is set to an
appropriate position before making measurement.
Be sure to set the function selector switch to the OFF
position after use. When the instrument will not be use for a long period of time, place it in storage after removing the battery. This is to avoid damage to the instrument by possible leakage from the battery.
Do not expose the instrument to the direct sun, extreme
temperatures or dew fall.
Placing the instrument in temperatures of 50or higher can
cause the instrument's case to deform and result in operation failures.
Never apply voltage to the OUTPUT terminal. the terminal is not
electrically isolated from the internal circuits of the instrument.
Measurement categories (Over-voltage categories) To ensure safe operation of measuring instruments, IEC61010 establishes safety standards for various electrical environments, categorized as CATto CAT, and called measurement categories. Higher-numbered categories correspond to electrical environments with greater momentary energy, so a measuring instrument designed for CATenvironments can endure greater momentary energy than one designed for CATⅡ.
CAT : Secondary electrical circuits connected to an AC electrical
outlet through a transformer or similar device.
CAT Ⅱ : Primary electrical circuits of equipment connected to an
AC electrical outlet by a power cord.
CAT Ⅲ : Primary electrical circuits of the equipment connected
directly to the distribution panel, and feeders from the distribution panel to outlets.
CAT :The circuit from the service drop to the service entrance,
and to the power meter and primary over-current protection device (distribution panel).
Incoming wire
CAT.IV
Interior wiring
Transformer
CAT.I
CAT.II
CAT.III
S
ocke
t
―4―
KEW SNAP 2413F is a unique digital clamp meter for both very low current and high current measurements. Its shielded transformers jaws minimizes the effect of external stray magnetic field, enabling leakage current measurements.
Measures from 0.1mA to 1000A AC and provides frequency response
higher than 1kHz on all measuring ranges.
Measurements also possible with approximately 7% accuracy at 20
kHz on 200mA range.
Provides a frequency selector switch 50/60Hz or WIDE to turn
on or off an incorporated low pass filter. This permits current
measurement in mains fundamental frequency only or a wide range
of frequencies, including those from such devices as inverters.
Peak-hold facility with selectable response time of 10ms or 100 ms.
Two-way analogue output terminal
Provides AC voltage output proportional to the current under test for
monitoring the waveform with an oscilloscope or measuring RMS
current values with a true-RMS-reading instrument.
Also convent ACA readings to DC voltage output for direct connection
to such devices as a chart recorder.
Data hold function to allow for easy readings in hard-to-reach
locations. Display can be observed away from the conductor.
2.Features
―5―
MeasuringRangesandAccuracy
●ACCurrent
3.Specifications
Refer to Figure 1 for frequency characteristics.
Effect of External Stray Magnetic Field
10mA AC max. in proximity to a 10mm-dia conductor carrying 100A AC.
Effect of Residual Current
10mA AC max. when clamping on two 10mm-dia conductors, each carrying supply or return 100A AC current.
Ranges
200mA
2A
20A
200A
1000A
0〜199.9mA
0〜1.999A
0〜19.99A
0〜199.9A
0〜500A
501〜1000A
Accuracy
FrequencyRangeResponse
50/60HzWIDE
±1.0%rdg±2dgt
(50/60Hz)
±3.0%rdg±2dgt
(40〜1kHz)
±1.5%rdg±2dgt
(50/60Hz)
±3.5%rdg±2dgt
(40〜1kHz)
±1.5%rdg±2dgt
(50/60Hz)
±3.5%rdg±2dgt
(40〜1kHz)
±5%rdg
(50/60Hz)
±10%rdg
(40〜1kHz)
±1.5%rdg±2dgt
±2.0%rdg±2dgt
±2.0%rdg±2dgt
±5.5%rdg 10min.
TimeLimitfor Measurements
Continuous
―6―
Range
200mA
2A
20A
200A
1000A
MeasuringRange
0〜200mA
0〜2A
0〜20A
0〜200A
0〜500A
501A〜1000A
ACOutputVoltage
Accuracy
0〜200mV
±2%rdg
±2.5%rdg
±3%rdg
±5%rdg
0〜50mV
50〜100mV
AnalogueOutput(Outputimpedance:Approx.1kΩ)
●ACOutput
*Voltage proportional to the current under test is output with
WIDEfrequency characteristics regardless of the setting of the
frequency Selector or peak hold switch.
―7―
●DCOutput
*DC voltage is output in proportion to the display reading, which
reflects frequency selector or peak hold switch position−200mV DC for 2000 count reading.
200mA
2A
20A
200A
1000A
0〜200mA
0〜2A
0〜20A
0〜200A
0〜500A
501A〜1000A
Ranges
ACInput
Current
DCOutput
Voltage
Accuracy(Frequency Range)
Freq.Selector
Switchat
WIDEposition
Freq.Selector
Switchat50/60Hz
Position
0〜200mV
±3%rdg
±3.5%rdg
±5%rdg
±7%rdg
±3.5%rdg
±4.0%rdg
±5.5%rdg
±7.5%rdg
0〜50mV
50〜100mV
OperatingSystem Dual Integration Display Field effect 3 1/2 digit liquid crystal
display with maximum count of 1999
Rangeselection Manual OverrangeIndication :1is displayed on the highest digit
except for 1000A AC range.
ResponseTime Approx. 1 seconds SampleRate Approx. 3 times per second DataHold Available on all ranges Locationforuse Indoor use, Altitude up to 2000m Temperature& Humidity forSpecifiedAccuracy 23℃±10, relative humidity up to
85% without condensation
StorageTemperature &Humidity :−1050, relative humidity up to
80% without condensation
OperatingTemperature &Humidity 040,relative humidity up to 85%
without condensation
―8―
PowerSource One 6 F22 or equivalent battery LowBatteryWarning :Bsymbol is shown on the display. CurrentConsumption Approx. 5mA max. Standard(Safety) IEC61010-1
IEC61010-2-032 CAT.,AC300V,Pollution degree 2
(EMC) IEC61326
EN55022
OverloadProtection 1500A AC max for 1 minute WithstandVoltage 3700V AC for 1 minute between
electrical circuit and housing cases
InsulationResistance :10MΩ or greater at 1000V between
electrical circuits and housing cases or metal parts of jaws
ConductorSize Approx. 68mm diameter max. Dimensions/Weight 250(L)×130(W)×50(D)mm×. 570
including battery
Accessories :6F22 battery
Carrying case Instruction manual
OptionalAccessories Model 7073 two-way output cord PeakHold Response time selectable from approx.
10ms and 100ms. 1/2 of the peak current is displayed, which means an RMS reading will be obtained when current having sinusoidal waveform in measured. Peak hold reading varies by approximately ±1% max of full scale in the first minute at 23℃±10℃ and relative humidity of 75% without condensation.
―9―
4.InstrumentLayout
Fig.2
⑩
―10―
① LCD
Field effect liquid crystal display with maximum indication of 1999. Function symbol(mA, A) and decimal point automatically appear as the function / range switch is turned. Bis displayed on the lower left corner for low battery warning and 1is displayed only at the highest digit for overrange indication.
② Data Hold Button
Allows for easy reading in dimly lit or hard-to-reach-locations. The display can be observed away from the conductor after pushing in the button. Data hold can be released by pushing the button again after the reading is taken.
③ Two-way Analogue Output Terminal
AC current picked up by transformer jaws (7) is converted and output as AC and DC voltage output. (See Analogue Output in section 3, Specifications.) Insert output cord Model 7073 into this terminal for monitoring waveform with an oscilloscope, making RMS measurements or connecting to a recorder.
④ Safety Hand Strap
prevents the instrument from slipping off the hand during use.
⑤ Power Function/Range Switch
Selection function and range. It is also used to turn power on or off.
CAUTION
Always set the Power Function/Range Switch to the OFF position
after use.
⑥ Jaw Trigger
Operates transformer jaws (7). Press to open the jaws.
⑦ Transformer Jaws
Pick up the current flowing through the conductor.
⑧ Peak Hold Selector Switch
Selects 10ms or 100ms response time. Set the switch back to the OFF position to release peak hold or make normal measurements.
⑨ Frequency Selector Switch
Makes frequency response selection.
⑩ Barrier
It is a part providing against electrical shock and ensuring the minimum required air and creepage distances.
―11―
5.Operation
5−1 Preparation
(1) To Check battery set the function/range switch (5) To the desired
position. If the display is clear without symbol Bshowing, battery voltage is sufficient. If the display blanks orBis
indicated, replace the battery in accordance with the battery
replacement procedures as described in section 6.
Note:B also appears on the display when the battery
becomes exhausted during use. Replace with a new battery.
(2) Make certain that the data hold button is in the off position not
pressed down. If a measurement is made with the data hold button
pressed in, the display remains locked irrespective of input.
5−2 ACcurrentMeasurement
WARNING
Do not make measurement on a circuit above 600V AC.
Transformer jaw tips are designed not to short the circuit under
test. If equipment under test has exposed conductive parts,
however, extra precaution should be taken to minimize the
possibility of shorting.
Do not make measurement with the battery compartment cover
removed from the instrument.
Keep your fingers and hands behind the barrier during
measurement.
―12―
CAUTION
Transformers jaws , especially their tips, have been precisely
adjusted to obtain maximum accuracy. Take sufficient care to avoid shock, vibration or excessive force when handing the instrument.
When a foreign substance is stick in the jaw tips or they cannot
properly engage, the transformer jaws do not fully close. 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 conductor that can be measured is approx.
68mm in diameter. An accurate measurement cannot be made on a conductor larger than this, because the transformer jaws cannot be fully closed.
Frequency selector switch (9) is designed to select the 50/60Hz andWIDEfrequency ranges. For further details, refer to section 5-4 for operation of the frequency selector switch.
The transformer jaws may buzz when measuring large current. This has no effect on the instrument's performance or safety.
(1) Set the function/range switch to the desired position. Do not exceed
the maximum allowable input current for the selected range.
(2) For normal measurement, press the jaw trigger to open the
transformer jaws and clamp onto one conductor only. See Figure
3. Earth leakage current or small current that flow through a
grounded wire can also be measured by this method. (Fig. 4) If is recommended that the conductor is placed at the center of the closed transformer jaws.
(3) To measure out of balance leakage current, clamp onto all
conductors except a grounded wire. The leakage current measure
will be indication on the display. (Fig.4&Fig.5)
―13―
NoteWhen measuring large current, observe the time limit specified in
section 3, Specifications. Otherwise, the transformers jaws may overheat, resulting in damage to the instrument.
Fig.3 Normal AC Current
p
)
Measurements
Fig.4 Earth Leakage Current
Measurements
Single-Phase 2-wire system (in 3-wire system with neutral
onto all 3 wire
clam
3-phase 3-wire system. (in 4-wire system with neutral clamp onto all 4 wire)
Fig.5 Measurements out of balance Leakage
―14―
5−3 HowtoUsePeakHoldFunction
10ms or 100ms response time can be selected for peak hold measurement. Make selection according to your application needs. (1) With the transformer jaws clamped onto the conductor under test,
slide the peak hold switch from the OFF position to the desired
peak response time position.
(2) The peak hold display reads 1/2 of the peak current value.
Therefore, an RMS reading will be obtained when the current
under test has a sinusoidal waveform.
I
(3) Slide the peak hold switch back to the OFF position for a reset.
Note 1KEW SNAP 2413F uses an analogue peak hold circuit to
ensure a quick response to input current. Because of the nature of this circuit, the peak hold reading may gradually fall or, in a rare case, rise with time. This is likely to be apparent when the instrument is used in a high temperature and high humidity environment. Therefore, the instrument will not be suitable for making peak measurement over an extended period of time. In case of such a need, connect a recorder to the instrument via the analogue output terminal.
―15―
Note 2If it is necessary to read the display away from the conductor
in a peak hold measurement, press the data hold switch (2) first and then remove the instrument from the conductor. Otherwise, the peak hold reading may be higher than the actual value due to the electrical noise caused by the opening and closing of the transformer jaws. Press the data hold switch again for a reset.
(4) Difference between 10ms and 100ms Peak Response Time
The peak hold circuit in this instrument charges the peak-hold capacitor after rectifying the input waveform. The time for the voltage of the capacitor to reach its peak value varies according to its capacitance and the output impedance of the charging circuit. KEW SNAP 2413F sets the time for the voltage of the capacitor to reach 90% of its peak value to 10ma or 100ms by switching between two output impedances. Refer to Figure 7 for further details.
I
For instance, select the 10ms response time when measuring a surge current that will occur when a power supply device is switched on. The 100ms response time is recommended for measuring the starting current of a motor or similar equipment. A stable measurement can be made on the 100ms second response time setting as the peak hold circuit does not readily respond to the surge current.
―16―
5−4 HowtoUseTheFrequencySelectorSwitch
KEW SNAP 2413F has a very good frequency response because of the electromagnetic property of its transformers jaws. Therefore, it measured, AC current not only of fundamental frequency of 50Hz or 60Hz, but of high frequencies and harmonics superimposed on the fundamental frequency. To eliminate these superimposed components and measure only in the fundamental frequency, KEW SNAP 2413F has a high-cut filter circuit, which can be activated by activated by setting the frequency selector switch to the '50/60Hz' position. The high-cut filter has a cut-off frequency of approx. 100Hz and an attenuation characteristics of approx. −24 dB/octave. Note:−24dB/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.
WIDE(40Hzover 1kHz):
Covers a wide frequency band from mains supply to high frequencies generated by such equipment as inverters.
50/60Hz(40Approx.100Hz):
Filters out high frequency components to restrict measurement in mains frequency band.
NoteSelection with the frequency selector switch dose not apply to
AC output of the two-way analogue output. DC output of the two­way analogue output reflects the frequency selector switch setting. Refer to Figure. 1 for frequency characteristics.
―17―
5−5 HowtoUseDataHoldFunction
Push in the Data Hold button to freeze the reading. This is especially useful for taking a reading in a dimly lit or hard-to-reach locations. The display can be observed away from the conductor. Push the button again to release the reading.
5−6 AnalogueOutput:HowtoUseModel7073OutputCord
AC and DC output can be obtained by inserting optional Model 7073 output cord into the two-way analogue output terminal (3).
AC Output Can be monitored by connecting a digital multimeter to analogue output terminal or observed as a waveform by connecting an oscilloscope. For true RMS measurements, connect a true-RMS-reading digital multimeter.
DC Output: Can be monitored by connecting a digital multimeter, or a recorder, which enables many hours of monitoring. See Figure 8. With the 2413F in the peak hold mode, DC voltage corresponding to 1/2 of a peak current value can be held and output. Refer to section 5-3, How to Use Peak Hold Function.
―18―
KEWSNAP2413F
Replace the battery when B symbol appears on the LCD display. (1) Set the function/range switch to the OFF position. (2) Unscrew and remove the battery compartment cover from the rear
of the case.
(3) Install a new 9V battery of type 6F22 or equivalent observing
correct polarity.
(4) Screw the battery compartment cover.
―19―
6.BatteryReplacement
WARNING
Never replace the battery during measurement.
―20―
Use a damp cloth detergent for cleaning the body of the instrument. To avoid possible deforming or discoloring, do not use solutions containing solvent.
7.Cleaning
CAUTION
Never use paint thinner, benzene or other solutions containing
solvent for cleaning the instrument. Otherwise, deforming or discoloring of the instrument body may result.
Handle the instrument with care and follow the instructions in
order to maintain it in good condition for a long period of time.
―21―
Use the following troubleshooting guide for hints on problems with instrument operation.
8.BeforeSendingforRepair
Transformer jaws buzz
when measuring large
current.
───
This is not a failure.
Condition
Display blanks after power-
on.
Battery is improperly
installed.
Battery is exhausted.
Install the battery correctly.
Replace the battery.
Possible Cause Remedy
Display reading remains
frozen.
Data hold button is pressed
in.
Peak hold switch is at ON
position.
Release data hold button.
Set peak hold switch to
OFF position.
The lowest digit of reading
is unstable.
───
This is not a failure.
The instrument is highly
accurate, so it senses
slight variations in the
current under test.
Output cord (Model 7073)
dose not output voltage.
The cord is open is circuit.
Check the cord for an open
circuit.
04―10
DISTRIBUTOR
92―1433A
Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations.
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