The electronic load verifying the LED driver not only has the functions of a general electronic load (CC, CR, CV, CP), but also must be able to simulate the load characteristics of the LED, set the forward bias (Vd) and the on-resistance ( Rd), etc. In addition, the built-in dimming control signal output is convenient for the PWM dimming test of the LED driver.

The dedicated electronic loads that GW Instek supports for LED driver testing are as follows:

• Must be installed on  3302G mainframe [single channel], 3305G [two channels] or 3300G [four channels], and the mainframe has 150 sets of store/recall memory
• 341G LED DC Electronic Load Simulator 300V, 24A, 300W
• 3342G LED DC Electronic Load Simulator 500V, 12A, 300W
• 3343G LED DC Electronic Load Simulator 500V, 24A, 300W
• 3345G LED DC Electronic Load Simulator 120V, 4A, 150W
• 3346G LED DC Electronic Load Simulator 120V, 12A, 300W
• 33401G LED DC Electronic Load Simulator 500V, 6A, 150W*2
• 33402G LED DC Electronic Load Simulator 120V, 2A, 75Wx2
• 33403G LED DC Electronic Load Simulator 120V, 6A, 150Wx2

• The power input dimming frequency of 3345G & 33402G can reach 25KHz, which is the fastest and widest bandwidth electronic load in the market
• The dimming control output of 3345G & 33402G is DC~10KHz (other models are DC~1kHz)

The remote sensing (Please refer our user manual) compensates for the cable loss for up to 0.5V. If the output level goes much higher, the remote sensing terminal might be disconnected. Make sure the connection is secure. Please refer our user manual page32 for details.

Auto Running Operation The function must be used together with the DELAY setting which is defined as the operation delay time of next running operation. The Delay function is workable only under Auto Running operation. Auto Running Operation The function must be used together with the DELAY setting which is defined as the operation delay time of next running operation. The Delay function is workable only under Auto Running operation. 

1)Delay time setting: Press [DELAY] to set the panel operation to Delay time setting selection. 

2)The setting and store of very group of data: A group setting includes the Output range, Output voltage value, Output current value, Over Voltage protection level, Over Current protection level, Over Voltage status (ON/OFF), and Delay time. User can proceed the setting and store it to the memory bank group by group up to 100 groups maximum. 

3)Recall range setting (Auto running operation range): Regarding the setting description, please refer to AUTO RANGE operation. 

4)Enter AUTO mode by pressing [AUTO], now, the operation is in the auto running function by pressing [OUTPUT]. 

5)Under this mode, press [SHIFT][AUTO INFO] can monitor the current operation setting address and operation time.

The following scenarios are possible:The following scenarios are possible:

• The rear panel remote control terminal is in the Off position. In this case, set it to the On position or deactivate remote control. For details, please refer see our user manual page39.

• The OVP setting switch on the rear panel is on the SET side. In this case, set the switch to the Normal side.

•The OVP indicator is red. In this case, change the OVP setting to higher value or remove the over voltage condition. 

*Note that in several conditions, the Output key automatically turns Off to avoid harmful condition. For details, please refer our user manual.

Regarding to verify the power supply specifications please make sure the power supply is powered on at least 30 minutes,within +20℃ ～ -30℃.

When using [User Special Function]->, select option 5. Add New Module and a message “ Invalid License” pop up

Check if the firmware version is too old? If it is lower than V2.10, please update to this version

1 Download the firmware version V2.10, there are a total of three files gw.sbt

https://www.dropbox.com/s/mlnsgpfu3xkbecs/gw.sbt?dl=0

https://www.dropbox.com/s/59m3kvvygpx9g98/gw_aps_uboot.blk?dl=0

https://www.dropbox.com/s/o981erg6zpxbah2/gw_aps_kernel.blk?dl=0

2 Create a GW folder in the root directory of the USB Flash Drive formatted as FAT-32.

3 Copy the downloaded file gw.sbt to the \gw folder of this USB Flash Drive

4 Insert the USB Flash Drive into the USB port on the front panel of the APS

5 Press MENU

6 Turn the knob to 11. Special Function and press Enter

7 Enter the password "5004"

8 Turn the knob to 1. Update Firmware and press Enter, there will be no screen update for a while

9 Turn the knob to 2. Update Boot and press Enter, there will be no screen update for a while

10 Turn the knob to 3. Update Kernel and press Enter, there will be no screen update for a while