AAI NJ300S User manual

1
AAI
50Hz-300kHz
Product manual
NJ300S
LCR impedance tester
Accuracy Agility Instrument

2
table of Contents
一、Product introduction........................................................................................................................................................3
二、Main Specifications.........................................................................................................................................................4
三、Body description..............................................................................................................................................................6
四、Function Description.......................................................................................................................................................8
1、measuring ..................................................................................................................................................................8
2、Calibration.............................................................................................................................................................12
3、system message .......................................................................................................................................................19
4、Usage intention........................................................................................................................................................19
5、Anti-interference......................................................................................................................................................20
五、Safety requirements.......................................................................................................................................................20
1、Charge......................................................................................................................................................................20
2、Storage.....................................................................................................................................................................20
3、transport...................................................................................................................................................................21
六、Matters needing attention..............................................................................................................................................21
七、After-sale service...........................................................................................................................................................22
八、contact us.......................................................................................................................................................................22

3
一、Product introduction
The NJ300S impedance tester, with a high-performance processor and ultra-low
power design, is a portable product that is mainly used to measure the performance
of the parameters of three basic components (resistance R, capacitive C, inductor
L). Products built-in large-capacity lithium-ion battery, small size, light
weight, easy to carry, for outdoor, high-altitude special work more convenient.
Product display interface and keys clear and simple, at a glance, Chinese and
English can be set themselves, easy to use, easy to operate.
main features：
①Wide test frequency range, frequency range: 50Hz ～300kHz, frequency point is
continuously adjustable.
②Small size, light weight, easy to carry. Appearance size: 130 * 108 * 31 (mm); net
weight: 315g.
③Built-in battery, using 2000mAH lithium polymer battery, continuous working time
exceeds 4 hours.
④High resolution, the measurement result is 6 significant digits.
⑤comes with calibration function, accurate measurement.
⑥High cost performance.
⑦Series / parallel mode, level and internal resistance are optional.
⑧Resistance to power frequency interference is strong, and the interference degree is
prompted.
⑨Automatic gear shift without manual intervention.

4
二、Main Specifications
Model
NJ300S
working frequency
50Hz～300kHz
Stepping
10Hz～10kHz
Display
2.4″TFT Resolution 320×240（QVGA）
Battery capacity
2000mAH（7.4Wh）
Power
<1W
Charging current
400mA
Charging interface
USB(Only as a charging interface)
Auto-shutdown
Always, now, 5 mins to 60 mins (optional)
Measurement parameters
Rs/Xs/Rp/Xp/Cs/Cp/Ls/Lp
|Z|/D/Q/θ/Vrms/Irms
DC bias
No
Show resolution
6-bit valid value
Measuring speed
Fast, medium, slow.
Measurement accuracy
<0.5‰
Less than within the measurement range
Connector
BNC
Show
range
|Z|,R,X
0.00001 mΩ～9999999 MΩ
C
0.00001pF～9999999F
L
0.00001nH～9999999H
D，Q
0.001～99999
θ(deg)
-179.9～179.9
Vrms
0.0001mV～999999mV
Irms
0.0001nA～999999mA
Measuring
range
|Z|
10mΩ～200MΩ
C
3fF～3F
L
0.5nH～600kH
Level
（mVrms）
100,200,300,400,500,600,700,800,900,1000
Output impedance
30Ω，100Ω(Optional)
Model
Automatic, series, parallel (optional)
Test piece
Automatic, resistance, inductance,
capacitance, electrolysis (optional)
Calibration function
Open circuit, short circuit (with factory
value), load calibration
physical dimension
130*108*31（mm）
net weight
315g

5
Operating temperature
5℃～40℃
Atmospheric pressure
860hPa～1060hPa

6
三、Body description
9
1
2
3
4
5
7
8
10
11
6

7
Key and interface function description
Number
sign
Name
Description
1
Main
Function key, press this key to switch between
"measurement", "calibration" and "system" interface;
after entering the sub-page, change to "BACK" / "NEXT"
function.
2
Left
Different pages correspond to functions.
3
Right
Different pages correspond to functions.
4
OK and on/off
OK；Press and hold (> 5s) to turn on / off.
5
LCD
LCD
6
Trademark
“浩蔓”
7
LOGO
Brand and product name
8
Hc,Hp
Lp,Lc
Measuring port
c: Current；p: Voltage；H: Output；L: Intput
9
Charging light
When the product is in standby mode, the charging
indicator is on.
10
Charging port
Use Mini-USB interface. Requires> 2A 5V charger.
11
Reset
If there is a product deadlock or other problems, use
it to reset the product.

8
四、Function Description
This product has three basic interfaces: measurement, calibration, and system.
"Measurement" and "Calibration" contain sub-interfaces.
By default, the system enters the Main test settings page (Figure 1-1).
1、measuring
（1）Main test settings page
Figure 1-1 Main Settings page（First interface after booting）
Description of five sub-functions
Average: The number of times the last formal measurement result
is averaged. The larger the value, the smoother the measured value.
Power frequency: Choose to measure the AC power supply frequency
of the equipment at the site, so that the system can better deal with mains
interference.
Speed: The speed of finding the exact value, that is, the choice
of measuring speed. When the measured value fluctuates greatly, you can choose
a slower speed measurement to improve the stability of the measurement. Loop
between 〝fast〞, 〝medium〞, and〝slow〞.
Level: The effective measured voltage value mVrms loaded on the DUT.
100～1000 (Progress in 100 units)
Internal resistance: the internal resistance of the local LCR device.
30 Euro, 100 Euro optional.

9
"NEXT": switch between the three main function areas. "ANALY", "CAL",
"SYSTEM".
"DOWN": In the five subfunctions in the left column, the loop switches from
top to bottom.
"ADJUST": Corresponding setting selection of corresponding sub-function.
select the relevant settings of the corresponding sub functions.
"OK": After confirmation, enter the main measurement page to start
measurement (Figure 1-2).
（2）main test page
Figure 1-2 main test page
The bottom line of functional instructions corresponds to the four
buttons. The upper right corner is the power display.
The main reference font is enlarged and placed on top for easy viewing.
During the measurement, when the font color of the main parameter changes to yellow,
The displayed value may be the best observation. The lower and middle areas show
other parameters.
“BACK”： Enter the "main test setting" page (Figure 1-1).

10
“MODE”： Circuit equivalent mode selection, automatic, series, parallel.
The current item is displayed directly above.
“ADJFRQ”： Frequency setting (Figure 1-3). The current frequency is
displayed above.
“DUT”： Select the type of measurement part, automatic, resistance,
inductance, capacitance, electrolysis. The current item is displayed above
“Interference degree”：Next to the model (see "0.00" next to "AUTO"
in Figure 1-2). No unit, pure number. Indicates the intensity of electromagnetic
interference at the test site. When the general value is less than 50, it has
little influence on the measured value.
（3）Frequency settings page
Figure 1-3 frequency setting page
The small yellow box is the current operation position.
"LEFT", "RIGHT": Change the position. Can be moved cyclically.
"ADJ": Set new value. The current bit cycles from 0 to 9 (the highest bit is limited to
0 to 3).
"OK": The new setting frequency is effective.