Model 7815 Parcel Bench Scale User’s Manual
11
Input/Output (I-O)
– To test the data I/O port,
install a loopback connector and press the test
button. The message
PASS
or
FAIL
is displayed.
This test requires a jumper (short) between
transmit and receive data lines.
Internal Counts (A/D)
– Displays A/D data
internal counts (factory use only).
Follow these steps to access the tests in the
DIAG menu. Refer to Figure 2.
1. Press SW-1…
Display shows
DIAG
.
2. Press the
TEST
key. . .
DISP
is displayed.
3. Press the
TEST
key to perform the display
test described earlier…
Display test is performed and shows
DISP
after the test is completed.
4. Press the
ZERO
key to scroll to the I/O test...
I-O
is displayed. This stands for the
Input/Output test.
5. With a loopback connector in place, press
the
TEST
key to perform the I/O test . . .
PASS
or
FAIL
is displayed. If the test
fails, the unit may have a serial interface
failure.
6. Press the
ZERO
key to scroll to the internal
count test . . .
A/D
is displayed. Tests A/D count data.
Step-by-Step Instructions
for Diag Mode
Return to normal
operating mode by
pressing the SW-1
switch.
Press the
ZERO
key
to scroll through the
lists of selections.
Press the
TEST
Key to
make a selection.
If you want to skip a
test, press the
ZERO
key to scroll to the
next test.
If you press the
ZERO
key to advance the
display message to
DONE, you can press
TEST
to return to the
DIAG menu.
If you encounter any
failure in these tests,
contact your local
Weigh-Tronix dealer.