Filter
Top Products
Remote Operation
74
Output On/Off
The OUT command disables/enables an output channel of the power supply. It will not disturb any other programmed
function nor will it reset the protection circuits. You can control individual outputs with the OUT command as shown
below. For example, to disable output channel 1 send the following:
OUT 1,0
To enable output channel 1 send the following command
OUT 1,1
You can find out the present state of output 1 by sending the query:
OUT? 1
and addressing the supply to talk. The response from the supply is either a "0" to indicate output 1 is off or a "1" to indicate
that the output is on. When disabled, the output behaves as if it were programmed to zero volts on the high voltage range
and 10 mA on the high current range.
Overvoltage (OV) Protection
The programmable OV is a protection feature which can be set by the operator to protect the load against excessive voltage.
When the actual voltage exceeds the programmed overvoltage setting for a given output channel, the OV is tripped. The
OV circuit will fire the SCR crowbar which shorts across the output and the output assumes a low impedance state.
For example, to program the OV of output channel 1 to 9.5 V send the following command:
OVSET 1,9.5
To find out the OV setting for output channel 1 send the following query and address the supply to talk:
OVSET? 1
To enable an output after it went into overvoltage, you must first remove the overvoltage condition and then send the OV
reset command.
To reset output 1 send:
OVRST 1
If you send the reset command without first removing the OV condition, the supply will fire the OV again.
Note If the programmable OV fails, the supply has a fixed OV circuit which will fire the SCR crowbar if the
voltage exceeds 120% of the maximum rated output. The fixed OV circuit will also fire the SCR crowbar
if the supply is off (line cord disconnected) and an external source is supplying voltage which exceeds
120% of the maximum rated output.