HP 5890 Series II Plus Reference Manual page 36

Keyboard and Displays
Entering setpoints
CLEAR
erase the entry in progress. The * disappears, and the original setpoint
display is restored.
Rules regarding keyboard usage are summarized below:
An instrument function key, when pressed, is shown in the display
along with its current setpoint value, and actual value for
continuously monitored functions: signal levels, temperatures, flow
rates.
-
An * (asterisk) is flashed as the new value is entered, indicating an
entry in progress.
ENTER
terminating a sequence to assign a particular detector to a given
output signal channel.
In general, any display showing the flashing * must be terminated
using
Upon pressing
range permitted for the particular function, and/or that the value is
internally consistent with previously defined setpoint values for other,
related functions.
-
-
The original setpoint value remains in force until an acceptable entry
is made.
36
can be used anytime during an entry, prior to pressing
A displayed function is also ready for entering a new setpoint
value simply by pressing appropriate keys.
must terminate a numeric entry. It is also required in
.
ENTER
, the value is verified to ensure it is within the
ENTER
If the value is accepted, * disappears from the display indicating
the new value is stored and implemented. For functions whose
values are continuously monitored, * is replaced by the actual
value.
If the value is out of range, or inconsistent with another setpoint
value, an appropriate message is displayed. Another setpoint
value may be entered immediately without again pressing the
particular instrument function key.
, to
ENTER