KRI9310 Handheld DC Resistance Tester

Cri9310Handheld DC resistance tester

I. Overview

1.1 Conventional use

DC resistance measurement is a necessary measurement item for semi-finished and finished products in transformer manufacturing, factory testing, installation, handover testing, and preventive testing by the power department. It can effectively detect manufacturing defects such as material selection, welding, loose connection parts, missing strands, and broken wires of transformer coils, as well as hidden dangers after operation.

In order to meet the needs of measuring the DC resistance of transformers, our company has developed a tool based system utilizing our technological advantagesKRI9310 Handheld DC Resistance TesterThis instrument is an innovative product with a compact size, handheld operation, battery power supply, and easy portability. It has the characteristics of small size, light weight, and high output current. The whole machine is controlled by a microcontroller, which automatically completes self checking, data processing, display and other functions. It also has functions such as automatic discharge and discharge sound alarm indication. The instrument has high measurement accuracy, easy operation, and can achieve rapid measurement of transformer DC resistance.

1.2 Safety precautions

1. This instrument can be used both indoors and outdoors, but it should be protected from rain, corrosive gases, dust, etchigh temperatureUse in other places.

2. Before using this instrument, be sure to read this manual carefully.

3. The operator of the instrument should have general knowledge of using electrical equipment or instruments.

4. This instrument is a high-precision instrument and should avoid severe vibration.

5. The maintenance, upkeep, and debugging of this instrument should be carried out by professionals.

6. After the test is completed, be sure to wait for the discharge indicator to be completed before turning off the power and removing the test line.

7. When measuring an unloaded voltage regulating transformer, be sure to wait for the discharge prompt to end before switching the transformer gear.

8. During the testing process, it is prohibited to disassemble and move the test clip and power supply line.

1.3 According to standards

KRI9310 Handheld DC Resistance TesterThe relevant standards based on are shown in the table below:

GB1094.1-GB1094.6-96Degrees of Protection Provided by Enclosures

Cri9310

2.1 Handheld DC resistance tester

1.2、 Product Information

2.competitive advantageThe instrument has a high output current and is lightweight, easy to carry.Instrument provided6-speed output current selection, availableoutput

3.10A current.Built in large capacity lithium battery,

4.Easy to operate on site and can work continuously5More than 8 hours.Wide measurement range (0-0KΩ），Applicable toTransformers, mutual inductors, reactorsGenerator, motorwait

emotionalTest sample,It can also be used to measure switches, copper bars, and connectionstouchdeviceRelay contactsMetal wires, cable accessories

5.Waiting for the measurement of the test sample

6..This instrument comes with functions such as a perpetual calendar, 99 sets of data storage, and manual temperature conversion. It will not lose data when turned off.

7.The menu is simple and friendly

8.The display data is clear and easy to read, and can be displayed clearly under sunlight.

9.This machine has an audio discharge alarm, clear discharge indication, and reduces misoperation.This machine has the characteristics of high precision, shock resistance, anti-interference, high stability, and easy portability.A protective circuit with *,Test line accidentally disconnected or power supply interrupted, built-inofDischarge circuit

And back electromotive force protection

10.Circuit makes itHas the ability to withstand tensile arcs.

Graphic interface, intuitive and concise

Support switching between Chinese and English.

2.3 2.2 Power supply mode

This instrument is powered by a large capacity built-in lithium battery;

2.4 Appearance diagram

g(including battery, excluding test line)

3.1 IIITest steps

sample

wiringConnect the tested product to the terminal of the machine through a dedicated testing wire, ensuring a secure connection and preventing false connections.The instrument wiring is shown in the following figure: Connect the red test wire plug rod to I+Up,Insertion rod connectedV+Up, clamp the test clamp onto one end of the test sample and connect the black test wire plug rod to itI-Up, connect the plug-in rod

3.2 V-

1. Clamp the test clamp onto the other end of the sample.Parameter Settings

2.After connecting all test wires, press the power button on the instrument and the LCD screen will displayThe "Main Menu" interface is shown in the following figure.

1. choiceResistance test ", press the" confirm "button to enter the measurement interface of the instrument, as shown below.During the testing process, if a poor contact fault is detected in the test line, the instrument will promptI

1. X=0 No current outputIf the internal temperature is detected to be too high, a warning prompt box will pop up and the measurement will be stopped.In the standby interface, set it upCurrent gear key, choose“5mA、100mA、300mA、1A、5A、10A”，Pay attention to the range range indicated after the current gear,Confirm testingSet current, ambient temperature, and presence or absence of copper supplementationWait for the information to be correct, pressTAB

2. Move the cursor to the keyAt the "start/stop" position, the instrument enters the testing state.When starting the test, the status will be displayed“Charging…”After a few seconds, it will display“Under testing

3. …”At this point, it indicates that the charging is complete and enters the testing state. After the data stabilizes, the resistance value of the tested product will be displayed.

After the test is completed, the instrument automatically pops upIn the "Test Results" dialog box, move the "Left" or "Right" arrow keys, select "Exit (without saving data)" and "Save data" to automatically store the data locally.Note:If the current temperature of the test sample has been entered and selected during setupThere is copper filling

4. The instrument will automatically display the resistance value of the test sample and convert it toThe resistance value at 75 ℃ is shown in the above figure.

1. In the main interface, select View Data and pressPress the "Confirm" button to enter the data browsing interface.On this interface, moveUse the "left" or "right" arrow keys to select "exit" and "export data". At this pointinsertUSB drive, "USB drive scanning in progress" appears

1. …”The instrument will export and store all data.

1. In the main interface, select System Settings and pressPress the "Confirm" button to enter the system settings interface.On this interface, perform“Time Settings”And“languagesettings”. throughpressLeft and right arrow keysMove the cursor and press

1. Up and down arrow keys to modify setting parameters.

1. In the main interface, select the factory settings and press

3.3 Press the "Confirm" button to enter the factory settings interface.

Factory mode requires password operation and is not open to users.Stop testingpress“confirm”Press the key to stop the test, the instrument power supply will automatically disconnect from the winding, discharge at the same time, and the sound alarm will sound. At this time, the display screen will return to the testing interface, and different options can be selected

Current gear keyAfter entering the test, the discharge speaker can be reconnected for the next measurement, or the test line can be removed to end the measurement.15Note:

3.4 No operationIn minutes, the instrument will automatically shut down.

instrumentchargeWhen the battery level shows low, pleaseTurn off the power switch

Simply plug the charger into the charging port to charge. The red indicator light of the charger indicates that it is charging. When the charging indicator light turns green, it indicates that the battery is fully charged.

1. Do not discharge the battery excessively, otherwise it will damage the battery.

2. Special Notice:

When the instrument is not in use for a long time, it is recommended to charge and maintain it every month to avoid damaging the battery due to self discharge!

It is strictly prohibited to use non company specific power adapters to charge the instrument, otherwise it may cause an explosion!!!

4、 Precautions

1. Before measuring the no-load tap changer of the transformer, it must be reset. After the discharge is completed, the alarm sound should stop before switching the tap changer.

When measuring the resistance on the high voltage side of a transformer with on load voltage regulation, start measuring from the 1 or 17 resistance range.

Before disconnecting, be sure to wait until the discharge is complete and the alarm stops before proceeding with the disconnection.4. When selecting the current, refer to the range in the technical specifications column and do not use it beyond or below the range. When the current exceeds the preset value, even if the test is forcibly continued, the stability of the results is poor. When the range is insufficient, the current is too small, resulting in unstable data for large capacity transformers. When these two states occur, confirm the range and select the appropriate range for testing.

5. The test data is unstable or has significant errors,In this situation, first check the test line for loose connections or loose connections. If it still cannot be resolved, check if the test sample is corroded.

During the testing process, the message 'Charging...' was consistently displayed