East Tester ET5420 User manual

ET5420 double channel
Programmable DC power load
User manual
Hangzhou Zhongchuang Electron Co.,Ltd

Basic Information
ET54 series single/double channel programmable dc electronic load, USES the hi
gh performance chip, high speed, high precision design, provide 1mV、 1mA resolution,
superior performance, can be widely applied to the charger, switching power supply,
linear power supply, production test of all kinds of batteries and other industries, sci
entific research institutions such asthe test research and development.
Product features:
humanized design.
2.8-inch TFT LCD display, rich display content, support Chinese and English display;
Simple and convenient operation process, with intuitive interface display system, easy to use;
It has the function of key lock to prevent misoperation.
high-performance load:
The basic measurement modes of CC, CV, CR, CP, CC+CV, CR+CV are provided.
Provide professional battery test and LED test;
Dynamic test mode, can test the dynamic power output performance;
Scanning test mode can test the continuity of power output within a certain range.
List mode, which can simulate various loaded state changes;
Short circuit test for simulating load short circuit;
The measurement model of the far end can improve the measurement accuracy when the curr
ent is high.
Support external trigger input;
Built-in buzzer alarm;
Power off to maintain data storage function;
Remote operation can be carried out through RS-232 interface and USB Device interface.
With PS2 interface, support external keypad to set data values;
safety protection:
With over voltage, over current and overpower protection functions, over voltage and over current
parameters can be set flexibly to effectively protect the load.
It has the function of secondary over-temperature protection to realize the double over-temperature
protection of software and hardware.
It has the function of intelligent fan speed control, which can effectively reduce the working fan
noise.
With output polarity reverse protection;

General technical specifications:
Power voltage: 220Vac±10%, optional 110Vac±10%, 45-65hz
Display: 2.8-inch TFT LCD, resolution 320 x 240
Operating temperature: 0 ℃to 40 ℃
Storage temperature: - 10 ℃to 70 ℃
Relative humidity: < 80%
Interface: standard USB Device, RS232(or 485)
Size: 90mm * 190mm * 300mm (width * height * depth)
Standard accessories:
One three-core power cord
Two power fuses
1 user manual

Catalog
一、Quick Reference.......................................................................................................................... 1
1.1 Front Panel Display ...............................................................................................................1
1.2Front Panel Press........................................................................................................................ 1
1.3Press Introduction .....................................................................................................................1
二、Function Operation ..................................................................................................................2
2.1 Remote/ Local Switch Opertion ............................................................................................2
2.2 System Setting Operation..........................................................................................................2
2.3 Load Setting operation ............................................................................................................ 3
2.4 Basic Mode operation ..............................................................................................................3
2.4.1Constant Current Test Mode ............................................................................................. 3
2.4.2Constant Voltage Test Mode...............................................................................................4
2.4.3 Constant Resistance Test Mode......................................................................................... 5
2.4.4 Constant Power Test Mode .............................................................................................. 5
2.4.5 Constant Current Switch To Voltage Test Mode .............................................................6
2.4.6 Constant Resisitance Switch To Voltage Test Mode ...................................................... 6
2.5 Dynamic Mode Test Operation..............................................................................................7
2.6 Listing Mode Test Operation ............................................................................................... 9
2.7 Scanning Mode Test Operation ........................................................................................11
2.8 Battery Test Operation ....................................................................................................... 12
2.9 LED Test Operation ........................................................................................................... 13
2.10 Short Circuit Test Operation .......................................................................................... 15
2.11 Protection Function............................................................................................................... 15
2.12Triggle Function ...................................................................................................................15
2.13Qualified test operation.......................................................................................................... 16
2.14 Other system settings .......................................................................................................... 16
2.14.1 Key Lock Funtion .........................................................................................................16
2.14.2 Outer Interface Function................................................................................................ 17
四、 Technic Specification........................................................................ 错误！未定义书签。

一、Quick Reference
1.1 Front Panel
1.2Front Panel Press
1.3 Key Manual
General function key
Shortcut function key
CH
CH1/CH2 switching
Shift+Menu
Non-basic mode parameter
settings
On1、On2
CH1/CH2 switch
key
Shift+Esc
return
Trigger
Trigger key
Shift+Mode
Mode selection
Enter
Enter
Shift+Utility
System common settings
◀ ▶
Cursor left and right
keys
Shift+Local
Remote local switching
Shift
Shift overlay

二、Function Operation
Before testing the pending test source by load, In order to ensure the stable and safe
operation of the load, please be sure that after connecting the load and pending testing
source by the way of red positive and black negative, turn on power output firstly , then
turn on the load.
2.1 Remote/ Local Switch Operation
When the load is working under remote control operation mode, there will be a
corresponding icon showing in the top line of the interface, then interface is locked. This
action could be controlled and operated by the PC instruction . Also users can press the
button 【Shift】+【Enter 】simultaneously to switch to the Local operating mode.
2.2 System Setting Operation
Press [Shift] + [Trigger] (Utility) to enter the system menu interface as shown in Figure 2.2.1.
Rotate the knob to select and enter the corresponding submenu. In the system setting
interface, you can complete operations such as language, factory reset, power-on settings, etc.
The system interface is shown in Figure 2.2.2.
Operation instructions: 1. Select the operation item by turning the knob. 2. Press [Enter]
to enter the submenu interface or switch the contents of the operation item. 3. Press [Shift] +
[▶] (Esc) to return to the previous interface.
Fig-2.2.1 Interface of System Setting
Fig 2.2.2 Interface of System Setting

2.3 Load Setting Operation
Through the system menu, you can enter the load setting interface, as shown in Figure 2.3. In
this interface, the relevant settings for the load range, limit value, delay off, etc. can be
completed.
Operation instructions: 1. Select the operation item by turning the knob. 2. Non-numeric
parameters Press [Enter] to switch the setting options. 3. Digital parameter, press [Enter] to
enter the edit mode, use the arrow keys to select the corresponding number of digits, then
rotate the knob to adjust the value, [Enter] to confirm the input. 4. Press [Shift] + [▶] (Esc)
to return to the previous interface.
Fig - 2.3 Interface of Load Setting
2.4 Basic Operation
Programmable electronic Load can work under these basic measurement mode:
Constant current mode (CC), constant voltage mode (CV), constant resistance mode (CR),
constant power mode (CP), constant voltage mode (CC+CV), constant resistance mode
(CC+CR). All these mode could be set through button of 【Mode】【Enter】【Esc】
on the testing display.
Fig -2.4 Interface of Mode Selection
2.4.1 Constant Current Measurement Mode

In constant current mode, the electronic load consumes a constant current regardless of
whether the input voltage changes.
Operation instructions: 1. Press the [CH] key to select the operation channel; 2. Select the
operation item by rotating the knob; 3. Set the parameters. Press [Enter] to enter the edit
mode, use the arrow keys to select the corresponding number of digits, then adjust the value
by turning the knob, [Enter] or [Shift] + [▶] (Esc) to exit editing; 4. Press the corresponding
[On1], [On2] startup mode.
\
Fig-2.4.1 Constant Current Test Mode
2.4.2 Constant Voltage Measurement Mode
In constant voltage mode, the electronic load will consume enough current to maintain
the input voltage at the set voltage.
Operation instructions: 1. Press the [CH] key to select the operation channel; 2. Select
the operation item by rotating the knob; 3. Set the parameters. Press [Enter] to enter the edit
mode, use the arrow keys to select the corresponding number of digits, then adjust the value
by turning the knob, [Enter], [Shift] + [▶] (Esc) to exit editing; 4. Press the corresponding
[On1], [On2] startup mode.
Fig- 2.4.2 Constant Voltage Measurement Mode

2.4.3 Constant Resistance Measurement Mode
In constant resistance mode, the load is equivalent to a constant resistance, and the load will
consume a correspondingly varying current as the input voltage changes.
Operation instructions: 1. Press the [CH] key to select the operation channel; 2. Select the
operation item by rotating the knob; 3. Set the parameters. Press [Enter] to enter the edit
mode, use the arrow keys to select the corresponding number of digits, then adjust the value
by turning the knob, [Enter] or [Shift] + [▶] (Esc) to exit editing; 4. Press the corresponding
[On1], [On2] startup mode.
Fig - 2.4.3 Constant Resistance Measurement Mode
2.4.4 Constant Power Measurement Mode
In constant power mode, the load consumes a constant amount of power. When the input
voltage changes, the load will adjust the current to maintain the power consumption at the set
power value.
Operation instructions: 1. Press the [CH] key to select the operation channel; 2. Select the
operation item by rotating the knob; 3. Set the parameters. Press [Enter] to enter the edit
mode, use the arrow keys to select the corresponding number of digits, then adjust the value
by turning the knob, [Enter] or [Shift] + [▶] (Esc) to exit editing; 4. Press the corresponding
[On], [On2] startup mode.
Fig 2.4.4 Constant Power Measurement Mode

2.4.5 Constant Current Switch to Constant Voltage Measurement Mode
The constant current voltage measurement mode is to prevent damage to the source under
test due to overcurrent discharge. In this mode, when the source to be tested cannot output
the current value set by the load, it will automatically switch from the constant current mode
to the constant voltage mode.
Operation instructions: 1. Press the [CH] key to select the operation channel; 2. Select the
operation item by rotating the knob; 3. Set the parameters. Press [Enter] to enter the edit
mode, use the arrow keys to select the corresponding number of digits, then adjust the value
by turning the knob, [Enter], [Shift] + [▶] (Esc) to exit editing; 4. Press the corresponding
[On1], [On2] startup mode.
Fig 2.4.5 Constant Current Switch to Constant Voltage Measurement Mode
2.4.6 Constant Resistance Switch to Constant Voltage Measurement
Mode
The constant resistance voltage measurement mode is to prevent damage to the source to be
tested due to overcurrent discharge. In this mode, when the source to be tested cannot output
enough current to maintain the set resistance, the load will change from constant resistance
mode to constant voltage mode.
Operation instructions: 1. Press the [CH] key to select the operation channel; 2. Select the
operation item by rotating the knob; 3. Set the parameters. Press [Enter] to enter the edit
mode, use the arrow keys to select the corresponding number of digits, then adjust the value
by turning the knob, [Enter], [Shift] + [▶] (Esc) to exit editing; 4. Press the corresponding
[On1], [On2] startup mode.