JOY-IT Multi-functional Tester

1. GENERAL INFORMATION

Dear customer, thank you for choosing our product. In the following, we will show you how to use this device.

Should you encounter any unexpected problems during use, please do not hesitate to contact us.

2. SPECIFICATION

This LCR meter offers a wide range of functions at a low price. The LCR meter can measure capacitance, resistance, and inductance among other things. In addition, it can automatically recognize components, for example, it can distinguish between different types of transistors, such as NPN or PNP transistors. The device is particularly easy to operate, as all measurements are started at the touch of a single button.

Thanks to the integrated about 300 mAh battery, measurements can also be carried out on the road. The battery is charged with the help of a 5V power supply unit (available separately) and the enclosed micro-USB cable. In addition, this measuring device can decode infrared signals and show them as a waveform on the display.

The LCR-T7 is not a professional measurement instrument and due to the large number of different components on the market, it cannot be guaranteed that all components will be correctly detected.

MAIN FEATURES

MEASURING RANGES

3. STRUCTURE

The device features a display, slots for measuring components, and slots for measuring breakdown voltage. It also has a microUSB port for charging and a charging status LED. An infrared decoder is also integrated.

Diagram Description: The main unit shows a screen labeled 'Multi-function Tester - T7' with various measurement readings. Below the screen are slots labeled '1', '2', '3' and 'K', 'A', '1', '2', '3'. There is also an 'IR' indicator and a yellow 'Start' button. The bottom part shows a separate unit with a 'microUSB port' and a 'Charging status LED'.

4. INITIAL OPERATION

When starting the measuring device for the first time, perform a self-test by short-circuiting slots 1, 2, and 3.

Diagram Description: A close-up view of the slots labeled '1', '2', '3' and 'K', 'A', '1', '2', '3' on the tester, with wires connecting slots 1, 2, and 3 to simulate a short circuit.

After short-circuiting, press the 'Start' button. The device will prompt you to remove the component at approximately 22% to complete the self-test. You can then start measuring components by pressing the 'Start' button.

Self-test progress indicators:

• 'Selftest Mode' showing '5%'
• 'Selftest Mode' showing '22%'
• 'Selftest End v2.12k' showing '100%' with the message 'Pls Isolate Probe!'

The tester has a built-in 3.7V, 300 mAh battery that can be charged via microUSB and a 5V power supply. The LED indicates battery status: red for charging, green for fully charged.

The residual battery voltage is displayed during each measurement as 'Vbat = ...V'. The device will indicate when the battery needs charging.

Low Battery Indicator: A screen message 'Charge the battery!' with '[Vbat = 2.90V]' is displayed.

The device automatically turns off after 20 seconds of inactivity. It can also be turned off manually by pressing and holding the 'Start' button for 3 seconds (standby mode) or 5 seconds (power off).

5. MEASURING COMPONENTS

This instrument can detect and measure diodes, Z-diodes, double diodes, resistors, capacitors, inductors, thyristors, triacs, field effect transistors, bipolar transistors, and batteries. Information on how to measure components and their values is provided below.

Use slots 1-3 for measuring components. Ensure that only one cable is connected to each channel (digit). For three connections, select any slot from 1, 2, and 3.

To measure breakdown voltage, use channels K and A. Connect the positive pin to K and the negative pin to A. Refer to the Z-Diode section for more information.

Components can be plugged directly into the terminals or connected using the provided cable clamps.

Diagram Description: Two views of the tester with components connected. The first shows a BJT transistor connected to slots 1, 2, and 3. The second shows a component connected to slots 'K' and 'A'.

After connecting a component, press the lever down and start the measurement with the 'Start' button.

Measurement in progress: A screen displays 'Testing...' with '[Vbat = 3.64V]'.

Error Message: If no component or a defective component is connected, or if it's connected incorrectly, the screen displays 'No, unknown, or damaged part'.

Component Measurement Details:

• Diode: Displays Uf (forward voltage), C (capacity), Ir (leakage current).
• Z-Diode: Displays Uz (reverse breakdown voltage / Z-voltage). Connect positive line to K and negative line to A. Measures up to 30 V in reverse voltage.
• Double diode: Displays Uf (forward voltage) for each diode.
• Resistor: Displays resistance in Ω.
• Capacitor: Displays capacity, Vloss (Loss factor), ESR (equivalent series resistance). Attention! Capacitors must be discharged before testing to prevent damage to the tester.
• Inductor: Displays inductance and R (resistance).
• Thyristor: Displays Uf (forward voltage).
• Triac: Displays Uf (forward voltage).
• Field effect transistor: Displays Vt (threshold voltage), Cg (gate capacity), Rds (drain source resistance), Uf (forward voltage), @Vg (gate voltage). Can distinguish between N-E-MOS, P-E-MOS, N-MOS, P-MOS, N-JFET, P-JFET, N-IGBT, and P-IGBT.
• Bipolar transistor: Displays hFE (current amplification factor), Ube (base voltage), Ic (collector current), Uf (forward voltage). Can distinguish between BJT-NPN, BJT-NPN with diode, BJT-PNP, and BJT-PNP with diode.
• Batteries: Displays battery voltage. Attention! The battery must have less than 4.5 V, otherwise the multifunction tester may be damaged!
• Infrared-Decoder: Located next to the start button. Activates automatically when an infrared remote control is placed in front of the device. Displays UserCode and DataCode in hexadecimal format. Only the NEC protocol can be decoded.

Diagram Descriptions for Component Measurements:

• Diode: Shows Uf, C, Ir values.
• Zener: Shows Uz value.
• 2 Diodes: Shows Uf values for two diodes.
• Resistor: Shows resistance value.
• Capacitor: Shows capacity, Vloss, ESR values.
• Inductor: Shows inductance and resistance values.
• Thyristor: Shows Uf value.
• Triac: Shows Uf value.
• P-E-MOS, N-JFET, P-JFET, P-IGBT: Show specific transistor parameters like Vt, Cg, Rds, Id, @Vg.
• BJT-NPN, BJT-PNP: Show hFE, Ube, Ic values.
• Cell: Shows battery voltage.
• IR Decoder: Shows UserCode and DataCode.

6. EXAMPLE COMPONENTS

A capacitor and an LED are included in the delivery for initial measurements to familiarize yourself with the device.

Image Description: A capacitor and an LED are shown.

7. PROBLEMS

The JT-LCR-T7 is not a professional measuring device, and due to the wide variety of components available, correct identification of all components cannot be guaranteed.

The JT-LCR-T7 is primarily designed for small-signal components, with a maximum measuring current of around 6 mA. Power semiconductors may present difficulties due to junction capacitance and high residual currents. Thyristors and triacs might be misidentified or not identified at all due to trigger and holding currents. Semiconductors with built-in resistors, like the base-emitter diode of a BU508D transistor, can also be challenging to test due to internal resistors, making it impossible to test transistor functions correctly, especially with the device's low measuring currents.

8. FURTHER INFORMATION

Information and redemption obligation according to the Electrical and Electronic Equipment Act (ElektroG).

Symbol on electrical and electronic products:

The crossed-out bin symbol indicates that electrical and electronic products do not belong in household waste. They must be handed over to a registration office. Before handing over an old appliance, remove any used batteries and accumulators not enclosed by the device.

Return options:

• As an end user, you can hand over your old appliance (with similar functions to the new one) free of charge for disposal when purchasing a new device.
• Small devices (under 25 cm outer dimensions) can be submitted independently of a new product purchase in normal household quantities.

Possibility of restitution at our company location during opening hours:

SIMAC GmbH, Pascalstr. 8, D-47506 Neukirchen-Vluyn

Possibility of restitution nearby:

Contact us via email at service@joy-it.net or by telephone to receive a parcel stamp for sending your old appliance free of charge.

Information about packaging:

Package your old appliance securely for transport. If you do not have suitable packaging material, contact us, and we will send you an appropriate package.

9. SUPPORT

For any questions or problems after purchase, contact us via email, telephone, or our ticket support system.

• E-Mail: service@joy-it.net
• Ticket-System: http://support.joy-it.net
• Telephone: +49 (0)2845 9360 – 50 (Mon – Thur: 09:00 - 17:00 o'clock, Fri: 09:00 - 14:30 o'clock)

For more information, visit our website: www.joy-it.net