Wuzhi ZK-FX25 User manual

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User’s Manual
versions: 
Qingdao wuzhi intelligent co. LTD
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Catalogue
1 General Description  . .
. Technical Parameters  . .
3. Product Picture..................................
4. Product Overview..............................
4.1 Function Overview.........................................
4. Operation Overview.........................................
4.3 Interface Overview.........................................
4.4 Application Example........................................
5. Product Appearance...........................
5.1 Board Dimension Figure .....................
6. Matters Need Attention ......................
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Qingdao wuzhi intelligent co. LTD
1.General Description
This product is USB electronic load tester.This
product has both USB test port and terminal interface,
which can meet various needs of customers.This
product has liquid crystal display interface, can real-
time display information such as voltage and current,
friendly interface, simple and easy to understand 
Product features:
· the design of separate power supply is adopted.
The measuring circuit and display circuit of the
product do not consume the energy of the test port, so
the measurement is more accurate and reliable.
· LCD display can display load input voltage, input
current, input power, discharge maH, discharge time,
product temperature and other information.
· complete protection mechanism, including
under-voltage protection, over-voltage protection,
over-current protection, over-power protection, over-
temperature protection and other protection.
· the current is regulated by a potentiometer with a
long handle, which can be rotated by hand without the
need for extra tools such as a word knife.
· with voltage and current correction function, to
meet the needs of customers with high precision.
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.Technical Parameters
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Fx 5 Fx35
DC5.0V (anti-reverse connection)
<= 00mA
DC1.5V-5V （anti-reverse connection）
0.00A-4.00A 0.00A-5.00A
 !"(± 1%+1 unit) Can be calibrated
#!!"$% 1&'1 unit(Can be calibrated
)#*" Fan w
ith temperature control and H eat sinks
+,
-15℃- 50℃
default 1.5V(Adjustable between 1.5v and 4.5v)
default
5.0V(Adjustable between 1.5v and 5v )
OverCurrent
default 80
℃(Adjustable between 4 0℃
and 80
℃)
114mm*43mm*30mm
6000rpm 8000rpm
default 4.1A
（Adjustable between
1.0A and 4 1A）
default5 .1A
(Adjustable between
1.0A and 4 1A)
default 5 .5W
（Adjustable between
1.0W and 5 5W）
default35 .5W
(Adjustable between
1.0W and 5 5W)
65g
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Weight
Size
Over-Temprature
Over-Voltage
Under-Voltage
Over-Power
Input Current
Input Voltage
Voltage Supply
Voltage Supply
Operating Temp

3 Product Picture
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-+. 电子负载测试仪
#
./


0
1
2


A– micro-usb for voltage supply (DC5V)
B– fan
C– the load input  terminal (DC1 5V 5V)
D–the load USB input port (DC1 5V5V)
E– potentiometer that regulates current
F– buzzer
G– Liquid crystal display
H– keys

I – aluminum heat sink
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4.1 Function Overview
1. LCD display
In the normal mode, he top line of LCD screen displays
the load input voltage and load temperature.Load current,
power, capacity and discharge time are displayed downline.
In the protection mode, LCD display protection code.
In the setting mode, LCD displays the setting parameter
codes and parameter thresholds.
2. Load current adjustment
he discharge current can be adjusted by potentiometer.
3. Sound-lig t alarm
When the load starts working, the RUN indicator light is
always on and the buzzer does not ring;When the load is o,
the RUN indicator does not light and the buzzer does not
sound.After entering the protection mode, the buzzer will
beep and the RUN indicator will ash.
4. intelligent fan cooling
The fan starts automatically when load discharge power is greater
than 10 w or load temperature greater than 40 ℃ .
5. Automatic statistics of disc arge capacity and disc arge time
as long as open the load (the RUN light is normally on),it began to
statistics.When close the load (the RUN light is not bright), it stop the
statistics.statistical data to support electricity storage, only a way to
reset the statistics in the LCD panel display discharge capacity, or
discharge time, long press the button”-”.Before starting the statistics,
please clear the statistical data first. The maximum discharge capacity
(OAH) and maximum discharge time (OHP) can be set on or off in the
setting mode(default off). When the threshold value is on, it is set. the
load will automatically close if the threshold value is exceeded, so as to
realize the unattended discharge experiment.
6. Perfect software and ardware protection mec anism
Software protection threshold are adjustable .After the software is
protected, the output is turned off.
Hardware protection:
Module power supply port and load input port are protected against
reverse connection.
Software protection:
OVP overvoltage protection (default 5.5V, which can be set by
yourself. After overvoltage protection, the RUN indicator flashes and
the LCD interface displays OVP);
OCP overcurrent protection (default 4.10A / 5.10A, can be set by
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4. Product Overview

yourself. After overcurrent protection, the RUN indicator flashes and the
LCD shows OCP;
OPP overpower protection (default: 5.5w / 35.5w, which can be set
by itself. After overpower protection, the RUN indicator will flash and the
LCD will display OPP);
OTP over temperature protection (default is 80 , can set, ask
protection after the RUN light is flashing, liquid crystal display OTP);
LVP undervoltage protection (default: 1.5v, you can set it by
yourself. After the undervoltage protection, the RUN indicator will flash
and the LCD will display LVP. In battery discharge test and other
applications, setting an appropriate LVP can effectively prevent the
battery from excessive discharge and damage the battery);
7. The load is turned off by default. After power ON, press ON/SET key
to start or shut down.
8. All parameters can be set off power storage.
4.2 Operation Overview
1. Detailed operation of potentiometer
Potentiometer is used to adjust the load discharge current, clockwise
rotation current increases, counterclockwise rotation current
decreases.
2. Detailed explanation of key operation
MODE
KEYS
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Normal Mode Protect Mode Setting Mode
ON/SET
Short press: switch the load
on/off state
Long press: enter parameter
setting mode
Short press: exit protection
mode
Long press: null
SELECT
S h o r t p r e s s : s w i t c h t h e
display of current, power,
capacity and discharge time
L o n g p r e s s : s w i t c h t h e
d i s p l a y o f v o l t a g e a n d
temperature
NULL
Short press: switch the
parameters to be set
Long press: null
'NULL NULL
Short press: set parameter
value to increase by one unit
Long press: set the parameter
value to increase continuous

Short press: null
Long press: reset when
display discharge capacity
or discharge time NULL
Short press: set parameter
value to decrease by one unit
Long press: set the
parameter value to decrease
continuously
Short press: switch the on-
off state of over capacity
and timeout
Long press: exit the setting
mode

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3
Interface Overview
1、boot screen
Note: start the machine and display the product model, then enter
the normal mode interface.
ZK -FX 5 ZK-FX35
、normal mode interface
Note: short press the button SELECT to switch the display of
current, power, discharge capacity and discharge time in the line below
the display screen (display the real-time current when the load is on,
display the setting current when the load is off or the potentiometer is
operated).Long press the button SELECT, you can switch the display of
voltage and module temperature on the top of the display screen.
Vin--Iset Vin--Iin Vin--Pin
Vin--C Vin-- IME-S Vin-- IME-h
emprature--Iin
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3、Protection mode interface
Note: when the working parameters of the load exceed
the allowable value, enter the protection mode, display the
fault code, load off, LED light flashing, buzzer alarm.In the
protection mode, press the button ON/SET to exit the
protection mode.
under-voltage over-voltage over-current
over-power over-temprature over-capacity
timeout load-failure
4、Setting mode interface
Note: in normal mode, long press the button ON/SET to enter the
setting mode.In the setting mode, long press the button ON/SET to
enter the normal mode.
Under the setting interface, press the SELECT button to switch the
parameters to be set.Press the button + or - to adjust the parameter
size.Under the timeout protection interface or overcapacity protection
interface, press the button ON/SET to turn ON or off the timeout
protection and overcapacity protection.Timeout protection and
overcapacity protection are off by default.
under-voltage over-voltage over-current

threshold threshold threshold
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over-power over-temprature timeout
timeout over-capacity over-capacity
voltage current
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threshold threshold ON
ON OFF ON
calibration calibration