Set The Output-On/Output-Off Delay; Protection Function For Power Supply - ITech IT-M3900D Series User Manual

9. Set the voltage and current.

4.4.4 Set the Output-On/Output-Off Delay

You can set the output-on/output-off delay time within the range from 0 seconds
to 60 seconds.
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The procedures to set the output delay time are as follows.
1. Press the composite keys [Shift]+[V-set] (Config) on the front panel to enter
2. Rotate the knob to select On Delay or Off Delay, and press [Enter] to
3. Set the output-on/output-off delay time and press [Enter] to confirm.

4.5 Protection Function for Power Supply

This series instrument provides the general protection functions such as over-
voltage, overcurrent, overpower, undercurrent and undervoltage protection. The
corresponding protection parameters can be configured in the Protect menu. In
addition, the power supply also provides over temperature protection and Sense
reverse connection protection.
The descriptions of Protect menu are listed in the table below.
Protect
a. Press the [I-set] key on the front panel to set the output current value
Iset. Take –5A as an example.
b. Press the [V-set] key on the front panel to set the voltage upper limit
Vlim=20V, and the voltage lower limit is 0.
c. Set the DUT (power supply) to output 80V, 10A.
At this time, 10Ω in sink mode (according to the formula I=U/R, sink current
is 80÷10=8A), due to the limitation of Is=–5A in CC priority mode, the actual
sink current is 5A, and the instrument is working In CC mode. If Sink Res is
set to 20Ω, the sink current is 4A, which is within the limit of Is, so the instru-
ment works in CR mode at this time.
On Delay: Indicates from the time that a command to turn on the output is re-
ceived until the output actually turns on.
Off Delay: Indicates from the time that a command to turn off the output is re-
ceived until the output actually turns off.
the configuration menu.
confirm.
Protection function menu for the power supply
Overvoltage protection
OVP
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Power Supply Function
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