WATERS CORPORATION 2424, Operator'S Manual, Page: 73 / 196

Using the keypad 3-9
The following table explains the functions of the primary and secondary keys
on the detector keypad.
Keypad description
Key
Description
Unshifted Shifted
HOME – Displays the Home
screen containing icons and
the gas pressure, Gain,
Nebulizer, Drift Tube, and
Light Scattering fields.
? – Displays context-sensitive
Help when available.
Chart Mark – Causes a
momentary pulse to the
analog output and digital
data.
Auto Zero – Sets the light
scattering offset so that the
signal light scattering output
reads 0 LSU.
Run/Stop – Starts or stops
(pauses) the run clock. The
elapsed time appears near the
lower, right-hand corner of
the Home screen.
Reset – Resets the detector
run clock to zero minutes and
returns the detector to initial
conditions for the current
method.
and – Displays the active field, displaying a heavy border
on screens with entry fields (edit, check box, or choice list).
The arrow keys make a different field active. ( moves up or
leftward; moves down or rightward.) On screens with a
scrollable list, these keys move the highlight upward (toward
the beginning of the list) or downward (toward the end). Other
screens can have special instructions for using the and
keys (for example, the Display Contrast screen).
?
HOME
Chart Mark
Auto Zero
Run/Stop
Reset