User manual

LABKON Series
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GMC-I Messtechnik GmbH 35
4.18 Using the Low-Level Commands
The main feature of the low-level commands is to provide you with more flexibility to change or query the individual
parameters than the APPLy command. Give the following example to illustrate how to use the low-level commands to set the
supply to an output of 5.0V rated at 4.0A:
VOLT 3.3
CURR 2.0
The two commands shown in this example have the same function as the first command shown in the above example, which
shows when some individual parameter is changed, there is no need to enter the whole setting parameters as the above
example, just enter some specified parameter.
Reading a Query Response
Only the query commands (commands that end with “?”) will instruct the power supply to send a response message, which
gives the either returned values or internal instrument settings. Take below commands as examples to illustrate:
SYST:ERR? Query and read the error message, and return a relevant error message
CAL:SEC:STAT? Query the calibration security, and return the relevant value
SYST:VERS? Query the system version, and return the version number accordingly
4.19 Selecting a Trigger Source
The power supply will accept a “bus” (software) trigger or an immediate internal trigger as a trigger source. By default, the
“bus” trigger source is selected. If you want the power supply to use an immediate internal trigger, you must select
“IMMediate”. For example:
TRIG:SOUR IMM Select an immediate internal trigger as a trigger source
INIT Initiate the trigger system
4.20 Using the APPLY Command
APPLy
{<voltage>|DEF|MIN|MAX}[,{<current>|DEF|MIN|MAX}]]
This command is to specify the power supply’s output, which can be divided into three parts:
The first part is the keyword “APLLy”.
The second part is to set the voltage value {<voltage>|DEF|MIN|MAX}, by which you can set the output voltage value of the
specified supply. For the setting range, please consult the relevant voltage parameters listed in the table of “Programming
Ranges and Output Identifiers” section.
The third part is to set the current value {<current>|DEF|MIN|MAX}, by which you can set the output current value of the
specified supply. For the setting range, please consult the relevant current parameters listed in the table of “Programming
Ranges and Output Identifiers” section.
When the voltage and current are set, the “DEF|MIN|MAX” represents the default value, the minimum value and the
maximum value respectively.