User manual

Page 60
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
EL 9000 B HP Series
3.10.4 Manual operation
3.10.4.1 Function selection and control
Via the touchscreen one of the functions described in 3.10.1 can be called
up,conguredandcontrolled.Selectionandcongurationareonlypossible
when the input is switched off.
► How to select a function and adjust parameters
1. While the DC input is switched off tap touch area on the main screen.
2. In the menu overview tap on the touch area and then on the desired function.
3. Depending on the choice of function there follows a request to which value the function generator is going
to be applied: or .
4. Adjust the parameters as you desire, like offset, amplitude and frequency for a sine wave, for example.
For the AC part of a function and if the difference between start and end value of ampli-
tude or frequency is too low (min. ΔY/Δt), depending on the time that is dened for one
function run, the function generator will not accept the settings and pop up an error.
5. Also adjust the overall limits of voltage, current and power, which you can access with touch area .
When entering function generator mode, those global limits are reset to safe values, which
might prevent the function from working at all. For example, if you apply the selected
function to the input current, then the overall current limit should not interfere and should
at least be as high as offset + amplitude.
Setting the various functions is described below. After setting it up, the function can be loaded.
► How to load a function
1. After setting the values for the required signal generation, tap on the
touch area .
The device will then load the data into the internal controller and changes the
display. Shortly afterwards the static values are set (power and voltage or
current), the DC input is switched on and the touch area enabled.
Only then can the function be started.
Because the DC input is automatically switched on in order to settle the start situation, the static
values are effective to the source immediately after loading the function. These static values
represent the situation before start and after the end of the function, so it doesn’t need to start
from 0. Only exception: when applying any function to the current (I), there is no adjustable
static current value, so the function would always start from 0 A.