JOY-IT Multi-functional Tester T7

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.

MAIN FEATURES

MEASURING RANGES

3. STRUCTURE

The device features a display, slots for measuring components, slots for measuring breakdown voltage, an infrared decoder, and a button.

The bottom part of the device has a charging status LED and a microUSB port.

4. INITIAL OPERATION

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

Press the 'Start' button to perform the self-test. The device will prompt you to remove the component at approximately 22% to complete the self-test successfully. You can then start measuring components by pressing the 'Start' button.

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

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

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.

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 measuring specific components and their values is provided.

Use slots 1-3 for measuring components, ensuring that no two cables are connected to the same channel.

For measuring breakdown voltage, use channels K and A. Connect the positive pin to K and the negative pin to A.

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

After connecting a component, press the lever and then the 'Start' button to begin the measurement.

If no component or a defective component is connected, or if it's connected incorrectly, a message like "No, unknown, or damaged part" will be displayed.

Diode

Measures Uf (forward voltage) and Ir (leakage current).

Z-Diode

Measures Uz (reverse breakdown voltage / Z-voltage). Connect the positive line to K and the negative line to A. Up to 30 V can be measured in reverse voltage.

Double diode

Measures Uf (forward voltage).

Resistor

Displays resistance in Ω.

Capacitor

Displays capacity. Also shows Vloss (Loss factor) and ESR (equivalent series resistance).

Attention! The capacitors must always be discharged before testing to prevent damage to the tester.

Inductor

Displays inductance and R (resistance).

Thyristor

Measures Uf (forward voltage).

Triac

Measures Uf (forward voltage).

Field effect transistor

Measures Vt (threshold voltage), Cg (gate capacity), Rds (drain source resistance), Uf (forward voltage), and @Vg (gate voltage). The tester can distinguish between N-E-MOS, P-E-MOS, N-MOS, P-MOS, N-JFET, P-JFET, N-IGBT, and P-IGBT.

Bipolar transistor

Measures hFE (current amplification factor), Ube (base voltage), Ic (collector current), and Uf (forward voltage). The tester can distinguish between BJT-NPN, BJT-NPN with diode, BJT-PNP, and BJT-PNP with diode.

Batteries

Displays the battery voltage.

Attention! The battery must have less than 4.5 V, otherwise the multifunction tester may be damaged!

Infrared-Decoder

The infrared decoder is located next to the start button and decodes infrared signals from remote controls. The UserCode and DataCode are displayed in hexadecimal format on the screen. The UserCode is specific to the remote control, and the DataCode is for the button pressed.

A dot at the top right indicates received infrared data: red means data is being received, blue means decoding is successful. Only the NEC protocol is decoded. If a different protocol is used, only the red dot will light up.

6. PROBLEM CASES

The transistor tester is designed for small-signal components with a maximum measuring current of about 6mA. Higher residual currents in power semiconductors can cause detection problems or issues when measuring junction capacitance. Thyristors and triacs may not reach their firing or holding currents, potentially leading to misidentification as NPN transistors or diodes, or failure to be detected at all.

Problems can also occur when recognizing semiconductors with integrated resistors. For example, the base-emitter diode of a BU508D transistor may not be detected due to a parallel-connected 420 Ω resistor, preventing transistor function testing. Darlington transistors with higher power may also present issues due to integrated base-emitter resistors, which complicate detection with the low measuring currents used.

7. EXAMPLE COMPONENTS

A capacitor and an LED are included in the scope of delivery for initial measurements to help users familiarize themselves with the instrument.

8. FURTHER INFORMATION

Electrical and Electronic Equipment Act (ElektroG)

Symbol on electrical and electronic products: This crossed-out bin symbol indicates that electrical and electronic products should not be disposed of as household waste. They must be handed over to a registration office. Used batteries and accumulators not enclosed by the device must be removed before handover.

Return options:

As an end user, you can return your old appliance (with essentially the same functions as the new one) free of charge for disposal when purchasing a new device. Small devices (outer dimensions not greater than 25 cm) can be submitted independently of a new product purchase in normal household quantities.

Possibility of restitution at our company location during our opening hours:

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

Possibility of restitution nearby:

Send your old appliance free of charge via parcel stamp. Contact us via email at service@joy-it.net or by phone for this service.

Information about packaging:

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

9. SUPPORT

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

• E-Mail: service@joy-it.net
• Ticket-System: http://support.joy-it.net
• Telephone: +49 (0)2845 9360 – 50 (10 - 17 oʻclock)

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