6.Check that the display reads approximately 0 volts and the minimum current limit value (0.05 to 0.13A depending upon the model and output, see Table 5-4). Also, check that the front panel CC annunciator is on indicating that the output is in the constant current mode of operation.

7.Set the current to 0.5 A by pressing:

ISET

 

.

 

5

 

ENTER

8.Check that the display reads approximately 0 V and 0.5 A.

9.Enable the overcurrent protection circuit by pressing:

OCP

10.Check that the OCP ENBLD annunciator is on indicating that overcurrent protection is enabled and the display reads "OVERCURRENT". When in overcurrent, the output is disabled.

11.Disable the overcurrent protection circuit by pressing:

OCP

12. Reset the output by pressing:

OC

RST

13.Check that the display reads approximately 0 V and 0.5 A.

14.Turn off the supply and remove the jumper from the output terminals.

Repeat the tests given on pages 37 & 38 for the other output channel (s) using the

key.

Introduction To Remote Operation

The following paragraphs explain the fundamentals of operating the supply remotely from a computer. Only a few commonly used programming commands will be discussed. Refer to Chapter 5 for a detailed description of all the commands. The intent of this discussion is to help first time users to quickly become familiar with operating their supply from a computer.

The programming examples that follow assume that a computer is connected to the HP-IB connector on the rear of your supply (see Chapter 2), power is applied, and loads are not connected to any of the supply's outputs. The examples used are primarily for HP Series 200 computers using HP BASIC language. Read the manuals for your particular computer to find out which statements you must use.

Enter/Output Statements

The programming statements you use to operate your supply from remote depend on your computer and its language. In particular, you need to know the statements your computer uses to output and enter information. For example, the HP BASIC language statement that addresses the power supply to listen and sends the command to the power supply is:

38 Getting Started