B&K 1787B, 1786B, 1788, 1785B Front-panel Operation Overview, Constant Voltage Operation

Chapter 3 Front-panel Operation

So far you have learned how to install your power supply and do quick start. During the quick start, you were briefly introduced to operating from the front panel as you learned how to check basic voltage and current functions. This chapter describes in detail the use of the front-panel keys and shows how they are used to accomplish power supply operation.

This chapter is divided into the following sections:

•Front-Panel Operation Overview‚ on page 14

•Constant Voltage Operation‚ on page 15

•Constant Current Operation‚ on page 15

•Storing and Recalling Operating States‚ on page 15

•MENU operation, starting on page 16

3.1 Front-panel Operation Overview

The following section describes an overview of the front-panel keys before operating your power supply. 1. The power supply is shipped from the factory configured in the front-panel operation mode. At

power-on, the power supply is automatically set to operate in the front-panel operation mode. When in this mode, the front panel keys can be used.

2.When the power supply is in remote operation mode, you cannot use the front-panel. A change between front-panel and remote operation modes will not result in any change in the output parameters. You can change the front-panel and remote operation modes by computer.

3.The power supply is in Meter mode when it is powered on, and the VFD will display the actual voltage and current output value. And in this mode, if any non-functional key is pressed, the power supply will changed to Set mode, and the VFD will display the adjusted voltage and current value. In Set mode,

the set voltage value will flash, you can press ? and ? keys to adjust the voltage value. In Set mode, the power supply will turn back to Meter mode if there is no any key is pressed for 3 seconds.

4.The output of the power supply can be enabled or disabled from the front panel by pressing Out on/off key. When the output is on, the ON annunciator will turn on.

5.The VFD display shows the present operating status of the power supply with annunciators. For example, the power supply is operating in CV mode, and then the CV annunciator will turn on. If, the power supply is remotely controlled, the Rmt annunciator will also turn on, See ‘‘Display Annunciators’’.

3.2 Constant Voltage Operation

The constant voltage range is from 0V to the maximum voltage value of each model. It is very easy for you to set the constant voltage output. You have 2 solutions to set the constant voltage value. Solution 1:

Step1. Power on the Power Supply

Step2. Press the ? and ? keys to change the value Solution 2:

Step1. Power on the IT68xx instrument

15