June 11, 2015, 715004752 Rev. A
Page 53
Chart-mark – Causes a
momentary pulse to the
analog output (A, B, or both
depending upon the current
settings). This key has no
effect if the chart-mark
function is disabled on both
channels.
SCAN – Displays the list of
options for generating and
manipulating spectra.
Auto Zero – Sets the
absorbance offset so that the
analog output (A, B, or both
depending on the current
settings), reads 0 AU. You can
enable or disable the autozero
function from the third
absorbance screen (see the
figure on
λ/λλ
– From the absorbance
screen, use this key to toggle
between single- and
dual-wavelength modes. The
current mode is indicated by
an icon on the display.
Run/Stop – Starts or stops
(freezes) the run clock. (The
elapsed time appears near the
lower right-hand corner of the
absorbance screen.) Initiates
scans.
Reset – Resets the detector
run clock to 0 minutes.
Returns the detector to initial
conditions for the current
method.
Arrow keys
−
On screens with entry fields (edit, check box, or
choice list), the border of the active field is thickened
(highlighted). Using the arrow keys, you move the highlighted
board to the field you want to activate. (Up moves up or left;
Down moves down or right.) On screens with scrollable lists,
these keys move the highlighted border up (toward the
beginning of the list) or down (toward the end). For other
screens, special instructions apply to the use of the Up and
Down arrow keys (for example, the Display Contrast screen).
Next – Displays a screen with
additional options related to a
current screen. Repeatedly
pressing this key brings back
the screen on which you
started. On most screens
where this key is active, the
NEXT arrow appears in the
lower, right-hand corner of the
display.
Previous – When the Next key
is available, use Previous to
navigate through the screens
in the reverse order.
A/B – On screens with the A/B
icon in the upper, left-hand
corner, this key toggles
between channel A and
channel B parameters.
METHOD – Displays the list of
options for creating and
clearing timed and threshold
events, storing, retrieving,
and resetting methods.
Table 3–3:
Detector keypad description (continued)
Key
Unshifted
Shifted
SCAN
Chart-mark
λ/λλ
Auto Zero
Reset
Run/Stop
Previous
Next
METHOD
A/B
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