MULTI-FUNCTIONAL TESTER

Multi-functional measurement device

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.

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Pascalstr. 8 47506 Neukirchen-Vluyn
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

Resistor, capacitor,
inductor, thyristor, triac,
(double) diode, Z-diode, field
Measurable components effect transistor,
bipolar transistor,
infrared decoder

Supported IR-protocol NEC

Display type 1.8″ TFT LCD (160 x 128 p)

Automatic calibration,
Special features One key operation

Lithium Ion rechargeable,

Built-in battery 3,7 V, about 300 mAh

Size 90 x 70 x 27 mm

MEASURING RANGES
Capacitance 25 pF - 100 mF
Resistance 0,01 Ω - 50 MΩ
Inductance 0,01 mH - 20 H
Battery 0,1 V - 4,5 V
Z-diode breakdown voltage 0,01 V - 30 V
Z-diode 0,01 V - 4,5 V
Diode UF < 4,5 V
Thyristor / Triac IGT < 6 mA

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 3. STRUCTURE

Display

Slots for
measuring

Slots for measuring the

breakdown voltage

Button
Infrared decoder

Charging status LED microUSB port

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Pascalstr. 8 47506 Neukirchen-Vluyn
4. INITIAL OPERATION

When you start the measuring device for the first time, you should first
perform a self-test of the device. For this purpose, you must short-circuit
the slots 1, 2 and 3. You do this as follows:

Now press Start to perform the self-test. You will be asked by the device
at approx. 22% to remove the component so that the self-test can be
completed successfully. Now you can start measuring your components.
You start the measuring process with the Start button.

A 3.7 V battery with about 300 mAh is built into the multifunction tester.
You can charge it with microUSB and a 5 V power supply. The LED shows
the
status of the battery. That means it shines red when the battery is
charging and green when the battery is fully charged.

The battery of this measuring device is also measured during each com-
ponent measurement. Therefore, the residual voltage of the battery is
also displayed during each measurement.

This residual voltage is displayed with Vbat = …V.

The device will also tell you when the battery needs to be charged again.

This device will automatically turn off after 20 seconds of inactivity. You
can also turn it off manually, by pressing and holding the Start button.
Pressing and holding the Start button for 3 seconds will put the device
into standby mode. Holding for 5 seconds will turn the device off.
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5. MEASURING COMPONENTS

This measuring instrument can detect and measure diodes, Z-diodes,

double diodes, resistors, capacitors, inductors, thyristors, triacs, field
effect transistors, bipolar transistors, and batteries. In the following, you
will find information on how to measure a component and which values
can be measured for the specific components.

To measure a component you can use slots 1-3. Just make sure that you
do not connect two cables to the same channel, i.e. the same digit. So
you have to select any slot at 1, 2, and 3 for three connections.
To measure the breakdown voltage, use channels K and A. Connect the
positive pin to K and the negative pin to A. You will find further
information under Z-Diode.

You can either plug the component directly into the terminals of the
device or use the cable clamps provided.

When you have connected your component, press down the lever and
start the measurement with the start button.

If no component or a defective component has been connected, or the

component has been connected incorrectly, the following message is
displayed on the screen.

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Pascalstr. 8 47506 Neukirchen-Vluyn
Diode
Uf - forward voltage
C - capacity
Ir - leakage current

Z-Diode
Uz - reverse breakdown voltage / Z-voltage
Here the breakdown voltage of a component is
measured, so here the positive line must be connected to
K and the negative line to A. Up to 30 V can be measured
in the reverse voltage.

Double diode
Uf - forward voltage

Resistor
Here the resistance in Ω is displayed.

Capacitor
The capacity is displayed here.
Vloss - Loss factor
ESR - equivalent series resistance

Attention!
The capacitors must always be discharged before you
can test them, otherwise the multifunction tester
may be damaged!

Inductor
The inductance is displayed here.
R - resistance

Thyristor
Uf - forward voltage

Triac
Uf - forward voltage

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Field effect transistor
Vt - threshold voltage
Cg - gate capacity
Rds - drain source resistance
Uf - forward voltage
@Vg - gate voltage
Here the multifunction 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
hFE - current amplification factor
Ube - base voltage
Ic - collector current
Uf - forward voltage
Here the multifunction tester can distinguish between
BJT-NPN, BJT-NPN with diode, BJT-PNP and BJT-PNP
with diode.

Batteries
The battery voltage is displayed here.

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 does not need to be activated separately. You can
simply e.g. activate your infrared remote control in front
of the device, which decodes it immediately. You can
then see the UserCode and the DataCode in hexadecimal
format on the screen. The UserCode is the specific code
of the remote control you are using and the DataCode is
the code of the button you pressed.

However, only the NEC protocol (which is used by many manufacturers) can be decoded.

6. EXAMPLE COMPONENTS

A capacitor and an LED are included in the delivery, you can use these for first measu-
rements with your LCR meter to get familiar with the device.

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Pascalstr. 8 47506 Neukirchen-Vluyn
7. PROBLEMS

The JT-LCR-T7 is not a professional measuring device, and due to the

wide variety of components available in the market, it cannot be
guaranteed that all components will be correctly identified.

Please note that the JT-LCR-T7 is primarily designed for small-signal

components and the maximum measuring current is usually around 6
mA. When dealing with power semiconductors, difficulties may arise in
identifying or measuring the junction capacitance due to high residual
currents. For thyristors and triacs, the trigger and holding currents are
often not sufficient, leading to misidentifications such as recognizing a
thyristor as an NPN transistor or diode. There are also instances where a
thyristor or triac may not be identified at all. Similar challenges occur
with semiconductors that have built-in resistors. For example, the
base-emitter diode of a BU508D transistor often goes unrecognized due
to an internally parallel-connected 42Ω resistor, making it impossible to
test the transistor function. High-power Darlington transistors, which
also have base-emitter resistors, can likewise be difficult to identify,
especially given the small measuring currents used by this device.

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Pascalstr. 8 47506 Neukirchen-Vluyn
 8. FURTHER INFORMATION

Our information and redemption obligation according to

the Electrical and Electronic Equipment Act (ElektroG)
PR
Symbol on electrial and electronic products :
This crossed-out bin means that electrical and electronic products do not
belong into the household waste. You must hand over your old appliance
to a registration office. Before you can hand over the old appliance, you
must remove used batteries and accumulators which are not enclosed by
the device.

Return options :
As the end user, you can hand over with the purchase of a new device
your old appliance (which has essentially the same functions as the new
one) free of charge for disposal. Small devices which do not have outer
dimensions greater than 25 cm can be submitted independently of the
purchase of a new product 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 :
We send you a parcel stamp with which you can send us your old
appliance free of charge. For this possibility, you must contact us via
e-mail at
service@joy-it.net or via telephone.

Information about packaging:

Please package your old appliance safe during transport. Should you not
have a suitable packaging material or you do not want to use your own
material, you can contact us and we will send you an appropriate
package.

9. SUPPORT

If any questions remain open or problems arise after your purchase, we

are available by email, telephone and ticket support system to answer
these.

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

Published: 2023.09.21

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www.joy-it.net
SIMAC Electronics GmbH
Pascalstr.
Pascalstr.8,847506
47506Neukirchen-Vluyn
Neukirchen-Vluyn