6
KEYBOARD
FUNCTIONS
The XC780 keyboard contains 20 switches, 21 annunciator lights, and an 8 digit
display.
The SHIFT key is used to activate the upper functions on some of the
keyswitches, similar to the way the SHIFT key works on a typewriter. The SHIFT
actuated function is the function shown on the upper portion of the key.
The convention used when operating the function keys is to always enter numeric
data([0]-[9], [.]) first on the keypad and then press the required function key
(count, tare, APW, store, id, etc.).
KEYS:
ZERO:
The ZERO key returns the scale to the center of zero. If any
weight is on the scale when ZERO is pressed, it will be zeroed out. Pressing
the zero key also initiates an internal calibration cycle which will factor out
errors due to temperature or drift factors. The scale must be stable to
complete zero. (i.e. the motion band set by the motion Band parameter must be
within the motion window for the scale to clear zero.)
TARE:
The PUSH/TARE key, like all keys with dual markings, has different
functions for SHIFT and non-SHIFT operation. The TARE key is operated by
pressing the TARE key without shift being activated. The TARE key is used for
keyboard entered tare and tare recall. For keyboard tare operation, simply
enter the tare value on the numeric keypad and press the TARE key. The XC780
switches to net weight mode, stores the tare weight, and displays the net
weight. The TARE key, when pressed without first entering data, is used to
display the current tare value. The tare may be cleared by entering 0, then
pressing the TARE key.
push to TARE:
The PUSH to TARE key is used for auto-tare operation. For
auto-tare, place an empty container on the scale and press the SHIFT key
followed by the TARE key. The XC780 switches to net weight mode, stores the
tare weight, and displays a reading of zero. Tare or tare weight is the term
used to describe the deduction from the gross weight of a substance and its
container to account for the weight of the container. The tare weight is the
weight of the container.
PRINT:
The PRINT key is used to output weight and scale information to a
printer or computer. For customizing this output see the sections on "Operator
Programmable Ticket Format" and "Operator Programmable Output Format" in the
XC780 Technical Manual. During the SETUP modes, the PRINT key is used to
select the current value and continue to the next parameter. (See "Parameter
Setup" and "Calibration" for details)
SCALE SELECT:
The SCALE SELECT key switches the displayed value(count or
weight) to the next operational scale. If only one scale is selected during
calibration setup, the SCALE SELECT key will have no effect. During the SETUP
