BIO RAD MyCycler Instruction Manual page 12

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Directional Arrows
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Typically this feature is used at the end of a protocol, but it
can be used at other points as well. When an infinite dwell
time is specified, the MyCycler will pause the protocol at
the selected temperature until you terminate or resume
execution.
Clear The Clear key is used to clear the entire entry in an input
field. For example, if you have specified an incorrect
duration for a step, pressing the Clear key erases the
entire entry, not just the last character entered.
Shift The Shift key is located to the left of the alphanumeric
keys. The Shift key is used in conjunction with the
alphanumeric keys to switch between alphabetic and
numeric character (see the discussion above for the
alphanumeric keys), when naming a protocol or instrument.
The four Directional Arrow keys surround the Enter key
and direct the cursor when navigating the screen.
Normally the right and left arrows are used to move from
field to field, not within a field. The exception is the case
when you are assigning a protocol or instrument name
using the alphanumeric keys: in this instance the right
and left arrows move the cursor within the name field and
the only way to move out of the field is with the Enter key.
The up and down arrows are used to move the cursor from
line to line within selection boxes, or from one field to field
when editing or creating protocols. In some of the Utilities
screens, the up and down arrows are used to set the time,
date, and default conditions. When a time or temperature
field has a default value and that field is highlighted, pushing
an arrow key is an implied Enter, accepting the default
entry.
Enter In the middle of the arrow keys is the Enter key. When
you press Enter the current selection or input field is
accepted.
Stop Below the LCD screen and to the left of the F1 softkey is
the Stop key. If the Stop key is pressed while a protocol
is running, the protocol will be paused (as described in
section 6.2.3). Pressing the Stop key again, while the
protocol is paused will terminate the protocol.
Standby
When the instrument is in Standby mode, pressing the
Standby key once turns the instrument back on. When
the instrument is on, holding the Standby key for 3 to 4
sefonds puts the instrument into Standby mode. A
warning will appear if you attempt to initiate Standby
mode while running a protocol, or when unsaved changes
have been made to a protocol.