KT 203 - Multimeter Kyoritsu - Free user manual and instructions

Product Type	AC/DC Digital Clamp Meter
Model	KEWTECH KT203
Brand	Kyoritsu
Display	Liquid crystal, maximum count 4199
AC Current Ranges	40.00A / 400.0A (auto-ranging, 50/60Hz)
DC Current Ranges	40.00A / 400.0A (auto-ranging)
AC Voltage Ranges	400.0V / 600V (auto-ranging, 50/60Hz)
DC Voltage Ranges	400.0V / 600V (auto-ranging)
Resistance Range	400.0Ω / 4000Ω (auto-ranging)
Continuity Check	Buzzer beeps below 50±35Ω
Data Hold Function	Freezes measured value on display
Sleep Function	Auto power-off after approx. 10 minutes
Overrange Indication	"OL." shown on display
Sample Rate	Approx. 2.5 times per second
Response Time	Approx. 2 seconds
Safety Standards	CAT III 300V AC, CAT II 600V AC/DC, pollution degree 2
Overload Protection	AC current: 480A AC/DC for 10s; voltage: 720V AC/DC for 10s; resistance: 300V AC/DC for 10s
Power Source	Two R03 (DC1.5V) batteries
Current Consumption	Approx. 15mA max (ACA/DCA), 5mA max (ACV/DCV/Ω)
Dimensions	187(L) x 68.5(W) x 38.5(D) mm
Weight	Approx. 200g (including batteries)
Conductor Size	Max 30mm diameter
Operating Temperature & Humidity	0~40°C, up to 85% RH (non-condensing)
Storage Temperature & Humidity	-20~60°C, up to 85% RH (non-condensing)
Accessories	Test leads, two R03 batteries, instruction manual

Frequently Asked Questions - KT 203 Kyoritsu

What is the maximum voltage this clamp meter can measure?

The KT203 can measure up to 600V AC/DC. Never exceed this limit to avoid shock or damage.

How do I measure AC current with the KT203?

Set the function selector to ACA, press the trigger to open the transformer jaws, clamp onto only one conductor, and read the display.

How do I zero adjust for DC current measurement?

With jaws closed and not clamped, press the 0 ADJ. switch for more than 2 seconds on the DC 40A range. The display should read zero before measurement.

What does the sleep function do and how to disable it?

The instrument automatically powers down after 10 minutes of inactivity. To disable, power on while holding the Data Hold switch; 'P.OFF' appears briefly. To re-enable, power off and on normally.

How do I use the data hold function?

Press the Data Hold switch to freeze the reading; '■' appears on the upper left. Press again to release.

What safety categories does the KT203 comply with?

It complies with CAT III 300V AC and CAT II 600V AC/DC, pollution degree 2, with double insulation.

How do I replace the batteries?

Set the function switch to OFF, remove test leads, unscrew the battery compartment on the bottom, replace with two R03 (1.5V) batteries observing polarity, then replace the cover.

What does it mean when the display shows 'BAT'?

The BAT indicator means low battery. Replace both batteries promptly to ensure accurate measurements.

Can I measure resistance on a live circuit?

No. Always power off the circuit before measuring resistance. Failure to do so may damage the meter or cause shock.

What is the maximum conductor size for current measurement?

The transformer jaws can accommodate conductors up to 30mm in diameter. For accurate readings, ensure the jaws are fully closed.

USER MANUAL KT 203 Kyoritsu

INSTRUCTION MANUAL AC/DC DIGITAL CLAMP METER KEWTECH KT203

Protective fingerguard (Barrier)

It is a part providing protection against electrical shock and ensuring the minimum required air and creepage distances.

Cap

Uncapped condition for CAT II environment Capped condition for CAT III/ IV environments The Cap should be firmly attached to the probes.

When the instrument and the test lead are combined and used together, whichever lower category either of them belongs to will be applied

1. Features

● Safety design conforming to the following provisions of IEC61010.

Measurement category III 300V AC, pollution degree 2

Measurement category II 600V AC/DC, pollution degree 2

- Protected throughout by double or reinforced insulation, indicated the International Electrical Symbol "□" on the bottom of the instrument.

● Data hold switch for easy reading in dimly light or hard-to-read locations.

● "Sleep" feature to extend battery life.

- Beeper permits easy continuity check. - Provides a dynamic range of 4,000 counts full scale.

1. Safety Warnings

● 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.

⚠ WARNING

- Read through and understand instructions contained in this manual before using the instrument

- Save and keep the manual handy to enable quick reference whenever necessary.

● The instrument is to be used only in its intended applications.

Understand and follow all the safety instructions contained in the manual.

Failure to follow the instructions may cause injury, instrument damage and/ordamage to equipment under test. Kyoritsu is by no means liable for any damage resulting from the instrument in contradiction to this cautionary note.

NOTE

The sleep feature automatically turns the instrument off in a certain period of time after the last switch operation. Therefore, the display may be blank with the function selector switch set to a position other than "OFF". To operate the instrument in this case, set the switch back to the "OFF" position, then to the desired position, or press any switch. If the display still blanks, the batteries are exhausted. Replace the batteries.

4-2 Checking Switch Setting and Operation

Make sure that the function selector switch is set to the correct position and the data hold switch is deactivated. Otherwise, desired measurement cannot be made.

5. Current Measurement

WARNING

- Do not make measurement on a circuit with a voltage higher than 600 V AC/DC. Otherwise, shock hazard or damage to the instrument or equipment under test may result.

- Transformer jaw tips are designed to minimize the possibility of shorting conductors in the circuit under test. If equipment under test has exposed conductive parts, however, extra precaution should be taken to avoid possible shorting.

- Do not make measurement with the battery compartment cover removed.

- Do not make current measurement with the test leads connected to the instrument.

- It is a part providing protection against electrical shock and ensuring the minimum required air and creepage distances. Keep your fingers and hands behind the barrier during measurement.

NOTE

- During current measurement, keep the transformer jaws fully closed. Otherwise, accurate measurement cannot be made. The maximum conductor size is 30 mm in diameter.

- When measuring a larger current, the transformer jaws may buzz. This does not affect the instrument's accuracy.

5-1 AC Current Measurement

(1) Set the function selector switch to the "ACA" position.

(2) Press the trigger to open the transformer jaws and clamp onto one conductor only.

(3) Take the reading on the display.

5-2 DC Current Measurement

(1) Set the function selector switch to the "DCA" position

(2) With the transformer jaws closed and without clamping them onto the conductor, press the 0 ADJ. Switch for more than 2 seconds to zero adjust the display. (less than 2 seconds: Data Hold Function operates.) The 0 ADJ. Switch is enabled only on DC 40A range.

(3) Press the trigger to open the transformer jaws and clamp onto one conductor only.

(4) Take the reading on the display.

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 instructions 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.

actions that can cause serious or fatal injury: CAUTION is reserved for conditions and actions that can cause minor injury or instrument 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.

This instrument satisfies the marking requirement defined in the WEEE Directive (2002/96/EC). This symbol indicates separate

collection for electrical and electronic equipment. ↓ Indicates Earth.

△ DANGER

● Never make measurement on a circuit with voltage higher than 600 V AC/DC.

- 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 jaws are made of metal and their tips are not insulated. Where equipment under test has exposed conductive parts, be especially careful to avoid the hazard of possible shorting.

● 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 open the battery compartment cover when making measurement.

- Verify proper operation on a known source before use or taking action as a result indication of the instrument.

- Keep your fingers and hands behind the protective fingerguard during measurement.

WARNING

- Never attempt to make any measurement if any abnormal conditions are noted, such as broken case, cracked test leads and exposed metal part.

- Do not turn the function selector switch with plugged in test leads connected to the circuit under test.

- Do not install substitute parts or make any modification to the instrument. Return the instrument to your distributor for repair or recalibration

- Do not try to replace the batteries if the surface of the instrument is wet.

● Always switch off the instrument before opening the battery compartment cover for battery replacement.

- Stop using the test lead if the outer jacket is damaged and the inner metal or color jacket is exposed.

CAUTION

● Make sure that the function selector switch is set to the appropriate position before making measurement.

NOTE

When current flows from the upside to the underside of the instrument, the polarity of the reading is positive (+). Otherwise, the polarity of the reading is negative (-).

6. Voltage Measurement

⚠️ DANGER

- Never use the instrument on a circuit with a voltage higher than 600 VAC/DC. Otherwise, electric shock hazard or damage to the

- Instrument of the circuit under test may result. - Do not make measurement with the battery compartment cover removed.

- Keep your fingers and hands behind the protective fingerguard during measurement.

6-1 AC Voltage Measurement

(1) Set the function selector switch to the "ACV" position

(2) Plug the red test lead into the V/Ω terminal and the black test lead into the COM terminal.

(3) Connect the test lead prods to the circuit under test and take the reading on the display.

6-2 DC Voltage Measurement

(1) Set the function selector switch to the "DCV" position

(2) Plug the red test lead into the V/Ω terminal and the black test lead into the COM terminal.

(3) Connect the test lead prods to the circuit under test and take the reading on the display.

7. Resistance Measurement

⚠️ DANGER

● Always make sure that the circuit under test is powered off.

- Do not make measurement with the battery compartment cover removed.

- Keep your fingers and hands behind the protective fingerguard during measurement.

(1) Set the function selector switch to the / ·s " position

(2) Plug the red test lead into the V/Ω terminal and the black test lead into the COM terminal.

(3) Check that the display reads "OL." with the test lead prods shorted together, also check that the buzzer beeps and the display reads "O."

(4) Connect the test lead prods to the circuit under test and take the reading on the display. The buzzer beeps the reading is below 50 ± 35 .

● Always make sure to insert each plug of the test leads fully into the appropriate terminal on the instrument.

● Make sure to remove the test leads from the instrument before making current measurement

- Do not expose the instrument to the direct sun, extreme temperatures or dew fall

- Be sure to set the function selector switch to the "OFF" position after use. When the instrument will not be in use for a long period of time, place it in storage after removing the battery.

- Use a damp cloth and detergent for cleaning the instrument. Do not use abrasives or solvents

- This instrument isn't dust & water proofed. Keep away from dust and water.

Measurement categories (Over-voltage categories)

To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as O to CAT IV, and called measurement categories.

Higher-numbered categories correspond to electrical

environments with greater momentary energy, so a measuring instrument designed for CAT III environments can endure greater momentary energy than one designed for CAT II.

1. Circuits which are not directly connected to the mains power supply.

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 IV : The circuit from the service drop to the service entrance, and to the power meter and primary overcurrent protection device (distribution panel).

1. Specifications

Measuring Ranges and Accuracy (at 22 + 5°C, 45.75% relative by

(at 25 ± 3°C, 45-75% relative humidity) AC Current (A) Auto-ranging (50/60Hz)

Range	Measuring Range	Accuracy
40A	0-40.00A	±3.0%rdg±8dgt
400A	15.0-299.9A	±3.5%rdg±6dgt
	300.0-400.0A	±4.0%rdg±6dgt

DC Current (A) Auto-ranging

Range	Measuring Range	Accuracy
40A	0-40.00A	±3.0%rdg±8dgt
400A	15.0-299.9A	±3.5%rdg±6dgt
	300.0-400.0A	±4.0%rdg±6dgt

AC Voltage (V) Auto-ranging (50/60Hz)

Range	Measuring Range	Accuracy
400V	0-400.0V	±2.0%rdg±5dgt
600V	150-600V

DC Voltage (V) Auto-ranging

Range	Measuring Range	Accuracy
400V	0-400.0V	±1.5%rdg±5dgt
600V	150-600V

Resistance(Ω /Continuity) Auto-ranging (Buzzer beeps below 50±35 Ω)

Range	Measuring Range	Accuracy
400 Ω	0-400.0 Ω	±2.0%rdg±5dgt
4000 Ω	150-4000 Ω

- Operating System

Dual Integration

- Display

Liquid crystal display

(maximum count: 4199)

● Low Battery Warning

BAT" is shown on the display

NOTE

- When shorting the test lead prods together, the display may show a very small resistance instead of "0." This is the resistance of the test leads.

- If one of the test leads has an open, the display reads "OL."

8. Other Functions

8-1 Sleep Function

NOTE

The instrument still consumes small amount of battery power in the sleep mode. Make sure to set the function selector switch to the "OFF" position after use.

(1) Sleep Mode

This is a function to prevent the instrument from being left powered on in order to conserve battery life. This function causes the instrument to automatically enter the sleep (powered down) mode about 10 minutes after the last switch or button operation.

To exit the sleep mode, turn the function selector switch back to "OFF", then to any other position, or press any button.

(2) How to disable the sleep mode

To disable the sleep mode, Power the instrument on with the data hold switch pressed. "P.OFF" is shown on the display for about 3 seconds after the instrument is powered on.

To enable the sleep mode, power the instrument off, then power it on without pressing the data hold switch.

8-2 Data Hold Function

This is a function used to freeze the measured value on the display. Press the data hold switch to freeze the reading. The reading will be held regardless of subsequent changes in input. "■" is shown on the upper left corner of the display while the instrument is in the data hold mode.

To exit the data hold mode, press the data hold switch again.

NOTE

- If the instrument in the data hold mode enters the sleep mode, the data hold mode will be cancelled.

- At DC 40A range, if the data hold switch is pressed for more than 2 seconds, 0 ADJ. Function operates.

● Overrange Indication

"OL." is shown on the display

- Response Time

Approx. 2 seconds

- Sample Rate :

About 2.5 times per second

● Temperature and Humidity for Guranteed Accuracy: 23 ± 5^ , relative humidity up to 85% without condensation

● Operating Temperature and Humidity :

0\~40°C . relative humidity up to 85%

without condensation

● Storage Temperature and Humidity

-20\~60°C, relative humidity up to 85%

without condensation

● Power Source

Two R03 or equivalent(DC1.5V) batteries

● Current Consumption

Approx. 15mA max. (ACA, DCA Range)

Approx. 5mA max. (ACV, DCV, Ω Range)

- Sleep Function :

Automatically powered down in about 10 minutes after the last switch operation (power consumption in the sleep mode is about 35 A .)

- Standards

IEC61010-1, -2-032, -2-033 CAT III 300V AC, pollution degree 2 CAT II 600V AC/DC, pollution degree 2 IEC61010-031 IEC61326-1 (EMC) EN50581 (RoHS)

● Overload Protection :

AC current ranges : 480A AC/DC for 10sec AC voltage ranges : 720V AC/DC for 10sec Resistance ranges : 300V AC/DC for 10sec

● Operating Environment

Indoor use, Altitude up to 2000m

●Withstand Voltage

3470VAC (RMS,50/60Hz) for 5 seconds between electrical circuit and housing case

● Insulation Resistance

10M Ω or greater at 1000V between electrical circuit and housing case

● Conductor Size

Approx. 30 mm diameter max

- Dimensions

187(L)x 68.5(W)x 38.5(D)mm

● Weight

Approx. 200g (including batteries)

- Accessories :

Test leads Two R03 batteries Instruction manual

4. Preparation for Measurement

4-1 Checking Battery Voltage

Set the function selector switch to any position other than "OFF". When the display is clear without "OFF" showing, proceed to measurement.

BAT showing, proceed to measurement. When the display blanks or "BAT" is indicated, replaces the batteries according to the instructions described in section 9. Battery Replacement.

9. Battery Replacement

WARNING

To avoid electric shock hazard, make sure to set the function selector switch to "OFF" and remove the test leads from the instrument before trying to replace the batteries.

⚠️ CAUTION

- Do not mix new and old batteries

● Make sure to install battery in correct polarity as indicated inside the battery compartment.

When "BAT" is shown on the display, replace the batteries. Note that when the battery is completely exhausted, the display blanks without "BAT" shown

DAT SHOWN

(1) Set the function selector switch to the "OFF" position.

(2) Unscrew and remove the battery compartment on the bottom of the instrument.

(3) Replace the batteries observing correct polarity. Use two new R03 or equivalent batteries.

(4) Mount and screw the battery compartment cover.

Factory: Ehime, Japan

www.kew-ltd.co.jp