Agilent Technologies 6629A Initial Conditions, Power Supply Commands, Parameter Inital Value

Initial Conditions

Immediately after power on from the factory, the power supply automatically undergoes a self-test and sets all parameters to the values contained in Table 5-3. The values in the first part of the table come from storage register 0 and were stored at the factory. They will remain until STO 0 is used to change settings of the power on state. When the power supply is again turned on, it will initialize its outputs to the values in storage register 0.

	Table 5-3. Initial Conditions
Parameter		Inital Value
Voltage	0		V High Range
Current		10 mA High Range
Reprogramming Delay		20 mS
Store/Recall registers:
0-10: Voltage	0		V High Range
Current		10 mA High Range
Over Voltage (OV)		55 V (High Range)
Over Current Protection (OCP)		Disabled
UNMASK register	0		(cleared)
SRQ	0		(Off)
Output Channels		On
Front Panel Metering		Output #1
Power Supply Address		Last stored value (Factory set to 5)
Local Control		Enabled
PON bit		On
PON SRQ		Off (0)
Cal Mode		Off

Power Supply Commands

This section discusses the commands which you will use to program the supply’s voltage and current, protection circuits, and enhanced features like storage and recall registers, and reprogramming delay. When programming, you should be aware that the current, voltage and overvoltage ranges for each output of your supply may differ. Table 5-1 shows these values for the power supply. If you send values out of these ranges, you will get a number range error. A summary of all commands appears in Appendix C.

The output voltage of some output channels exceeds the safe operating limit of 42.2 V. To avoid any electrical shock, program the voltage to zero volts or turn off ac input power before changing any rear panel connections. Make certain all straps are properly connected, terminal block screws are securely tightened and terminal block covers are replaced before reapplying power.

Voltage Programming

To program voltage, send the output channel and the programmed value. In the example below, output l is programmed to 5 V.

VSET 1,5

The values you send must always be volts. For example if you want to program 450 millivolts, convert to volts and then send the command:

Remote Operation 71