AMETEK Programmable Power Sorensen XDL II Serie Operación Manual página 15

The OK key is used to confirm most keypad entries. At all other times it becomes the VIEW V/I
LIMITS key and pressing it will cause the display to show preset output voltage and current limit
for 3 seconds; during this period the LIM indicator in the display flashes.
Pressing SHIFT illuminates the key and gives the numeric keys the functions marked above them
(e.g. STORE, RECALL, etc.). When a function is selected by pressing one of these keys SHIFT
is cancelled (the SHIFT key is no longer lit). The further key presses required to complete the
selected function are described in detail in the sections that follow; if no key is pressed within 10
seconds to complete the function, the function will terminate as if ESCAPE has been pressed.
SHIFT is a toggle key; pressing SHIFT again when it has been selected will cancel SHIFT. SHIFT
is also cancelled by ESCAPE, or by pressing SET V or SET I. Note that in LINK mode settings
accessed by STORE and RECALL are specific to the LINK mode and are in addition to settings
accessible when STORE and RECALL are used on individually selected outputs.
Jog Control
The rotary 'jog' control permits the output voltage or current limit to be incremented or
decremented in steps with a resolution set by the JOG SET keys; the output immediately follows
the setting, i.e. no OK is required.
At power-up jog is always off. To jog the voltage or current setting press the V or I JOG SET key;
the key will illuminate and the JOG indicator under the digit that was last jogged will flash. Whilst
the V or I JOG SET key is lit, each further press of the V or I key moves the JOG indicator one
digit to the left; the selection 'wraps-round' such that when the largest value of jog increment has
been reached the next press returns it to the lowest. The default position at power-up is under
the LSD, i.e. the lowest jog increment is selected.
Turning the rotary jog control clockwise/anti-clockwise increments/decrements the selected digit;
digits to the left of the one being jogged are automatically incremented/decremented when the
decade overflow/underflow point is reached. Digits to the right of the one being jogged remain
unchanged unless the jog step overflows/underflows the range maximum/minimum in which case
they are set to zero. On the XDL 35-5, for example, 33·65V goes to 34·65V goes to 35·00V for
the 35V range and a 1V jog increment; 0·160A goes to 0·060A goes to 0·001A for a 0·1A jog
decrement.
The jog steps that can be selected for the main range are 1mV, 10mV, 100mV and 1mA, 10mA,
100mA; if the 500mA range has been selected the current increment steps are 0·1mA, 1mA,
10mA.
To disable the jog rotary control press the JOG SET OFF key; reselecting JOG SET V or I will
enable jog on the last used digit position. Jog is not cancelled by using numeric entry or any of
the SHIFT functions but it is disabled whilst that function is enabled.
When in constant voltage mode, with the output on, the right-hand display will show actual current
rather than current limit. If JOG SET I is selected the JOG indicator under the selected digit will
flash at half-speed ('lazy' flash). To observe the effect of jogging the current limit it will be
necessary to either turn the output off (so that the display permanently shows the current limit) or
to press VIEW V/I LIMITS which causes the current limit to be displayed until 3 seconds after
movement of the jog control ceases. The 'lazy' flash is also used when JOG SET V has been
selected and actual voltage is being shown because the supply has gone into current limit.
The factory default is to flash the JOG indicator under the selected digit for the whole time that jog
is selected so that the user is constantly reminded which parameter can be incremented/
decremented. Where this degree of reminding is considered inadequate the user can select,
using the Extra Functions capability, to flash the digit itself; conversely, where the flashing is
considered intrusive the user can select to not flash the JOG indicator (except when the 'lazy'
flash is shown).
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