Cr-Led Test Function; Measurement Of Voltage Rise Time - ITech IT8500plus Series User Manual

confirm.
(8)Pannel Locked in case of Error Operations
Press [ Shift ]+ [ On/Off ] (Lock) button to lock the panel.In this mode,only [ Shift ] and [ On/Off ]
button is enabled.
According to the following steps to escape OPP mode:
Press [Shift ]+ [ 8 ] (system)---"RUNMODE"---[ Enter ] ----select "NORMAL" mode--- [ Enter ]

3.15 CR-LED Test Function

With adding of diode break-over voltage setting in the IT8500+ series electronic
load
voltage applied at its both ends is higher than the diode break-over voltage to
give a real simulation of diode working principle, i.e., the ripple current at real
LED test.
Detailed steps of LED power test:
1. Start CR-LED Function
Press [Shift] + [9] keys to enter configuration menu. Press Right Key and
select "CR-LED". Press [Enter] key for entry. Select "on" and press [Enter]
key. Press [ESC] key to exit.
2. Set CR Mode and Resistance Value
Press [CR] key and set corresponding constant resistance (as R calculated
below).
3. Set Vd Value
Press [Shift] + [CV] keys for a series of related setting: range=7500.0,
high=130V, low=0V, which may remain the original values. Vd will be set
based on the calculation below.
Calculation method of Vd and R:
Vd=V*0.8
Where:





3.16 Measurement of Voltage Rise Time

The IT8500+ series electronic load is provided with special voltage rise/drop
time measurement function. This function gives a simple analog of voltage
rise/drop speed of oscilloscope test power.
Operation methods:
Set initial Voltage and Final Voltage
1. Press [Shift] + [9] keys to enter configuration menu. Press Right key.
Select "Measure" and press [Enter] key.
2. Press [
keys to set initial voltage value and press [Enter] key.
3. Press [
keys to set final voltage value and press [Enter] key.
4. Press [ESC] to exit setting.
Start timer function
under conventional CR mode, the electronic load only works when
R=0.2V/I
V: constant working voltage of load LED of LED constant current
source;
I: output current of LED constant current source;
Vd: break-over voltage of diode (string);
R: constant resistance;
] to select "TimeV1". Press [Enter] key. Press numeric
] to select "TimeV2". Press [Enter] key. Press numeric
Copyright © Itech Electronics Co., Ltd.
Functions and Characteristics
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