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