HP 6623A, 6624A Annunciators, Power Supply Status, Alphanumeric LCD, System Control Keys, Hp-Ib

Table 3-1. Controls and Indicators (continued)

Number	Controls/lndicators	Description	Page
3	OUTPUT	Indicate which output channel has been selected for front	36, 37,
	Annunciators	panel control and/or display. (Only one output	83, 83
		annunciator can be on at a time.)
4	Power Supply Status	CV - Indicates that the selected output channel is in the	37, 43,
	Annunciators	constant voltage mode.	83
	(These five annunciators	CC - Indicates that the selected output channel is in the	37, 43,
	indicate the status of the	positive constant current mode ( + CC) or the negative	83
	power supply).	current limit ( - CC) mode.
		UNR - Indicates that the selected output channel is	43
		unregulated; i.e., it is not regulated by CV or CC control
		loops.	37, 63,
		OCP ENBLD - Indicates that the overcurrent protection	83
		function for the selected channel is enabled.	43, 68,
		ERR - Indicates that a programming or hardware error	84
		has occurred and that the ERR bit in the serial poll
		register has not been cleared.
5	Alphanumeric LCD	Normally displays the measured output voltage and	36, 37,
	Display (When power is	current for the selected channel. When programmed from	43, 69,
	turned on, all segments will	the front panel, the function being programmed (e.g.	83, 83
	be displayed for	VSET), the output channel (e.g. 2), and the present value
	approximately 2 seconds).	(e.g. 2.250) will be displayed. Error conditions will be
		spelled out in alpha characters.
6	System Control Keys	ADDR - Displays the power supply's HP-IB address. You	37, 61,
	(These four control keys	can change the address using the numeric entry keys. You	83
	affect the entire power supply	cannot query or change the address remotely (over the
	and are independent of the	HP-IB).
	output selected).	ERR- Displays a programming or hardware error	69, 84
		message and clears the ERR bit in the serial poll register.
		STO - Used in conjunction with the numeric entry keys to	63, 84
		store the present output voltage and current settings for all
		outputs in the specified internal register (1 to 10). Each
		register contains voltage and current settings for all
		output channels.
		RCL - Used in conjunction with the numeric entry keys to	63, 84
		recall the settings from the specified internal register (1 to
		10). All outputs are set to the recalled values.

Getting Started 33