GMC-I Messtechnik GmbH
21
Iset – Output Current
The procedure for selecting output current Iset is identical to the
procedure for selecting output voltage Uset (4.1.2).
However, the following controls and displays must be substituted:
•
Iset rotary knob (chapter 3 [10]
•
Right-hand display (chapter 3 [8])
•
Yellow Iset/A LED (chapter 3 [9])
•
Setting resolution
:
4 step widths are possible: 0.001 A / 0.01 A / 0.1 A / 1 A
Attention:
Iset
may not be set to a value which exceeds
Ilim
!
4.2.2
Pre-selected Setting (ENTER, scroll keys)
If the application requires that switching to a new setpoint takes
place in a single jump by pressing a key (without semi-continuous
adjustment), this can be accomplished as follows.
Proceed to the basic setting menu with the <CE/LOCAL> key, i.e.
to the display of momentary output values. Press the <ENTER>
key in order to switch to the pre-selection setting mode. After
switching to this mode, the currently valid setpoint values appear
at both displays (indicated by the LEDs above the display).
As a default function, voltage adjustment is always activated first,
which is indicated by a blinking decimal place at the
corresponding display. Repeatedly press the <ENTER> key in
order to switch back and forth between current adjustment and
voltage adjustment.
The new setpoint can be selected with the scroll keys (and only
with the scroll keys), after selecting voltage or current setpoint
adjustment and the desired resolution. The SET LED blinks in
order to indicate that a change has been made but not yet
activated. The new setpoint is activated after acknowledging with
the <ENTER> key.
Pre-Selecting a Setpoint
☞
Press
the
<ENTER>
key [15].
!
The display [5] is switched from
Uout
(measured voltage value)
to
Uset
(voltage setpoint). The
decimal place
which corresponds
to the selected resolution setting
blinks
.
!
The green
Uout/V LED
goes out, and the yellow
Uset/V LED
[6]
lights up (as long as the
Uset/V LED
is continuously illuminated
,
direct adjustment with immediate activation of the new value
can be executed with the rotary knob [7]).
Setting resolution:
!
3 step widths
are possible:
0.01 V
,
0.1 V
or
1 V
.
☞
Repeatedly press the
<SELECT>
key [13] until the desired
decimal place (
step width
)
blinks at the display.
Output Voltage:
☞
Press either the <
> key or the <
> key [11]!
<
> (increment)
Increases the value
<
> (decrement)
Decreases the value
!
The yellow
Uset/V LED
[5] starts blinking.
!
A blinking Uset/V LED
indicates that
new values are displayed
but not activated
during adjustment. The old
Uset
value
remains active.
☞
Press the <
> key or the <
> key [11] until the desired
value appears at the display [5].
!
Each time the key is pressed, output voltage is changed
by an amount which corresponds to the value selected
with the resolution setting function.
!
Pressing and holding the respective key results in rapid
scrolling, regardless of the step width.
☞
Acknowledge the selected value with the
<ENTER>
key
[15]. The new value is now activated at the output [4], and
the yellow
Uset/V LED
[6] is continuously illuminated.
☞
Repeatedly press the <
ENTER
> key [15] in order to switch
back and forth between
Uset
and
Iset
.
Figure 4.2.2 a
Adjusting Uset with a Specified Fixed Value
•
Output voltage jumps from the old value to the new value in a
single step (no intermediate values).
Attention:
Uset
may not be set to a value which exceeds
Ulim
!
4.3 Switching the Power Output On and Off
The
<OUTPUT>
[2]
) functions independently of the
current operating state of the KONSTANTER.
Details regarding control mode, protective function and status
displays which provide information concerning the output’s
operating mode are included in chapter 3
[3]
.
Closed Loop Control Mode
The power output can be activated or deactivated by pressing the
<OUTPUT>
key [2]
.
OUTPUT OFF
OUTPUT ON
REMOTE
status (remote control)
(
The <
OUTPUT
> key
[2]
is disabled and has no function.
LOCAL LOCKED
status (front panel controls disabled)
(
The <
OUTPUT
> key [2] is disabled and has no function.
trG out (T_MODE OUT) and External Trigger Active
The output can be activated an deactivated with the trigger
signal (trG parameter OUT selected).
If the power output has been disabled by applying an
external
trigger signal
to the analog interface, it cannot be switched on,
neither by means of a command nor with the keys. The
corresponding command is not executed and bit 4 in event
register B is set (output-on error). “Err 25” also appears briefly
at the display as a warning in the event of manual operation.
The status of the power output
(
[4/22]
) is indicated
by the
red LED
above the <
OUTPUT
>
key [2]
:
LED on
= output activated
LED off
= output deactivated
In the case of
OUTPUT OFF
, the control mode displays are also
switched off
(
[3]
).
If the output has be deactivated as a result of
overtemperature
protection
, the
yellow “240 W” LED
[3]
in the control mode
display blinks. The output cannot be activated until the
KONSTANTER has returned to its normal operating
temperature.
Iset / A
Iout
t
(1)
(2)
(3)
Uset / V
ENTER
ENTER
ENTER
Uout Iout
Select Uset
Uout Unchanged!
CE/LOCAL
Uout Iout
Iout Unchanged!
Activate
Select Iset
Uset
Summary of Contents for SSP 120 Series
Page 2: ...2 GMC I Messtechnik GmbH ...
