Agilent Technologies Agilent 6031A, Agilent 6030A manual Voltage and Current Readback

Note the use of a semicolon as a separator between the device command and the data in the second example program line above. The semicolon suppresses the carriage return and line feed which would be sent with a comma. The carriage return and line feed sent with a comma would cause an unrecognized statement.

A non-zero value of current should be programmed even without a load if constant voltage operation is desired. If current is not programmed, the supply may remain in constant current at zero volts

EXAMPLE 1: Programming voltage with a variable. This program ramps up output voltage in 200mV steps from 0 to 20 volts.

10 ASSIGN @Ps TO 705

20OUTPUT @Ps: “CLR: ISET 1”

30FOR Voltage=0 T0 20 STEP .2

40 OUTPUT @Ps : “VSET” :Voltage

50WAIT .2

60NEXT Voltage

70END

Explanation:

10:Assign I/O path name to power supply

20:Initialize, program current limit to non zero value

30,60:Increment voltage in 0.2 volt steps to 20 volts

50:Wait 200mS between steps

Voltage and Current Readback

Reading back data from the power supply requires two statements. First, a device command must be sent which tells the power supply which data to obtain and send. Then the data can be entered into a variable. For example, the output voltage can be measured and read into the variable A with the following statements:

OUTPUT @PS;”VOUT?”

ENTER @ PS;A

Output current can be measured and read into A using the statements above by substituting "IOUT?" for “VOUT?”

The voltage and current settings can be read back as shown above using the queries “VSET?” and “ISET?”.

EXAMPLE 2: This example programs up the out-put of the supply, programs it down and prints out the time to settle to within 20mV of the programmed value. Because the down programming time varies with load and the change in programmed value, a function (Settled) is used here which waits for the output to settle to within 20mV of the set value before allowing the program to continue.

10ASSIGN @Ps T0 705

20COM /Ps/ @Ps

30OUTPUT @Ps:”CLR:VSET 20:ISET 2”

40		WAIT 1
50		OUTPUT @Ps; “VSET .1”
60	Im:	IMAGE “SETTLED IN “,Z.DDD. “SECONDS”
70		IF FNSettled (.02,5) THEN
80		PRINT USING Im;FNElapsed_time
81		90	END IF

100END

110!

116 Programming the Agilent 603xA Power Supplies Using Basic