Further Control Elements; Adjusting Set Values - Elektro-Automatik PS 8040-170 3U Bedienungsanleitung

Operating the device

6.3 Further control elements

Pushbuttons Rotary knob
Both of the rotary knobs have a push button function. Pushing
any or both of these will effect following:
a) Fine adjustment mode (Fine)
A short push of any of both buttons activates or deactivates the
fine adjustment mode. If „Fine" is active, all set values, thres-
holds and limits can be adjusted in smallest possible steps, no
matter what mode is currently active (preset, memory ect.). It is
indicated by the status text „Fine" in the status area. Also see
section „6.4. Adjusting set values" below.
b) Device setup
Pushing both buttons together for >3s while the output is off
changes to device setup. It is exited the same way. See section
„8. Device setup" about the device setup.

6.4 Adjusting set values

1. Manual operation
During manual operation, both rotary knobs are used to conti-
nuously adjust the set values of voltage and current from 0%
to 100% nominal value in predefined steps (see table). In order
to set the values for OVP and UVL the button Preset UVL/OVP
has to pushed once or twice. In order to set the power set value
the button Preset Power has to be pushed.
Attention! The OVP value can be lower than the voltage set
value and will cause an OV error as soon as the output is
switched on and the actual voltage reaches the OVP threshold!
Setting values manually can be done in fine or coarse steps,
whereas coarse is default. Fine is required to be activated by
the one of rotary knob pushbuttons and has a step width of 1.
For coarse adjustment, following step widths apply in de-
pendency of the nominal values (also refer to technical specs):
Voltage
Nom. val. Coarse Fine
40V 0.25V 10mV
80V 0.5V 10mV
160V 1V 100mV 70A
200V 2V 100mV 90A
240V 2V 100mV 120A
400V 2V 100mV 140A
500V 5V 100mV 210/250A 2A
600V 5V 100mV 340A
1000V 10V 1V
1500V 10V 1V
Power
Nom. val. Coarse Fine
3.3/5kW 0.050kW 1W
6.6/10kW 0.10kW 10W
15kW 0.10kW 10W
Important! The resolution of the set value adjustment in some
cases is, depending on the nominal values, higher than the one
of the output voltage. Thus it can happen that the output voltage
only changes every 2 or 3 steps.
Instruction Manual
PS 8000 3U Series
Current
Nom. val. Coarse Fine
30A 0.2A 10mA
60A 0.5A 10mA
0.5A 10mA
1A 10mA
1A 100mA
1A 100mA
100mA
2A 100mA
510A 5A 100mA
2. Remote control by analogue interface
Via an analogue interface (short: AI) it is possible to remotely
control current, voltage and power. All three values are required.
It means, it's not possible to adjust voltage via the AI and the
current with the rotary knob on the front at the same time or
vice versa. Because the OVP threshold can not be adjusted
via the AI, it is required to set it manually on the device before
switching to analogue remote control.
In remote control, switching to preset mode with the preset
buttons shows the translated set values which are put into
the set value pins of the AI. In order to put in appropriate set
values, the user can either use an external voltage source or
the reference output voltage on pin 3.
In case it is, for example, only required to adjust voltage by
external means, the current set value (CSEL) resp. power set
value (PSEL) can be bridged to the reference voltage (VREF).
The AI can be operated with the common 0...5V or 0...10V
ranges, each corresponding to 0...100% nominal values. The
desired control voltage range is selected in the device setup.
Following applies:
0-5V: Reference voltage = 5V, 0...5V set value voltage corre-
spond to 0...100% nominal value, 0...100% actual value cor-
respond to 0...5V at the actual value outputs (CMON, VMON,
PMON).
0-10V: Reference voltage = 10V, 0...10V set value voltage
correspond to 0...100% nominal value, 0...100% actual value
correspond to 0...10V at the actual value outputs (CMON,
VMON, PMON).
Set values that exceed the limit, for example >5V while the 0...5V
range is selected, are intercepted by clipping the concerned
set value to 100%.
Never input voltages higher than 12V to the set value inputs!
3. Remote control by digital interface card
The optional, digital interface cards allow to set voltage, current
and power, as well as the OVP threshold and undervoltage
limit UVL by means of a PC and many more. When changing
to remote control mode, the device keeps the last set values
until they're altered. Hence it would be possible to control only
voltage by sending arbitrary set values and the current set value
would remain unaltered.
Set values given by the digital interface (except GPIB and
Ethernet) are always percentage and correspond, at 100% (hex:
0x6400) or 110% (hex: 0x6E00) for the OVP threshold, to the
nominal values of the device.
Using GPIB or Ethernet (via SCPI language), any value is given
as real decimal value.
Furthermore, the digital interfaces allow to query and set a
lot of other features and values. For details refer to section
„9. Digital interface cards" and the instruction manual of the
interface cards.
Date: 06-27-2011
EN
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