32
OFF
TEST
GROSS
G
KEYPAD FUNCTIONS
The 748 is equipped
with a 27-key keypad.
The keypad is used to
enter commands and
data into the
instrument. This
section describes each
key along with its
normal function. It is
helpful to refer to the
actual instrument while
reading this section.
The membrane keyboard is not to be operated with pointed objects (pencils, pens,
fingernails, etc). Damage to keyboard resulting from this practice will NOT be covered
under warranty.
ON-ZERO KEY
This key performs two (2) functions. Pressing it when the 748 is off will apply power to
the instrument. Pressing it when the 748 is on will cause an immediate zeroing of the
weight display up to the selected limit of 4% or 100% of the scale’s capacity. This
selection is made during the setup and calibration of the instrument.
OFF KEY
Pressing this key will turn the 748 off.
TEST KEY
The TEST key is used to conduct a test of all display elements. The test consists of six
(6) cycles, each lasting two (2) seconds:
1. All horizontal segments and the left 1/3 of the bar graph will turn on (no annunciators).
2. All vertical segments and the center 1/3 of the bar graph will turn on (no annunciators).
3. All annunciators, decimal points and the right 1/3 of the bar graph will turn on.
4. All display elements off.
5. The calibration numbers (C1 - C4).
6. The model no. 748 and the software version X.X.
Following the display test, four (4) calibration numbers (C1, C2, C3 and C4) will be indicated in
sequence. These numbers correspond to the settings of the setup parameters as well as the
calibration setting of the indicator. It is a good idea to copy these numbers down and place them in a
safe location AFTER completion of the calibration process.
GROSS KEY
The GROSS key will cause the weight display to return to the Gross Weight mode. The
Gross
annunciator will be turned on.
TARE KEY
There are two (2) TARE keys on the 748. The top (blue) TARE key is used to
momentarily display the stored tare value. The other TARE key (red) is used to enter a
new tare weight value. If the push button tare is enabled during setup and calibration,
pressing the red TARE key will cause the current gross weight to be stored as the new
tare weight and cause the weight display to change to the net weight display mode (
Net
annunciator
turned on). If the push button tare feature was not enabled, pressing the red TARE key will cause the
current value of the tare weight to be displayed (
Tare
annunciator turned on). The tare weight may be
ON
ZERO
GROSS
G
TARE
T
NET
N
ENTER
TIME
DATE
T
TARE
BAR
CLEAR
PRESET
F1 F2 0
7 8 9
4 5 6
1 2 3
748
12345678
GROSS TARE NET ZERO ID F1 F2 TIME/DATE
OFF
TEST
PRINT
lb
kg
ID
Cardinal
Cardinal Scale Manufacturing Co.
LOW
BATT
PWC
figure no. 13 - keyboard layout
ON
ZERO
0
Blue
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