NCI 7821, Руководство пользователя

Страница: 22 / 28

Model 7821 Bench Scale User’s Manual
22
RECOMMENDED ACTION
Perform each step in sequence until the symp-
tom is resolved. Once the symptom is resolved,
discontinue the troubleshooting steps and
continue with regular product usage.
1. Check that the primary side of the cord is
plugged into the AC outlet, and the second-
ary side is properly connected to the power
jack on the back of the scale.
2. Replace power supply.
1. Replace display board.
1. Press the ZERO key.
2. Check for interference of weighing platform.
3. Power down, then power up the scale.
4. Recalibrate the scale.
1. Power down, then power up the scale.
2. Check software PROM for proper insertion.
3. Check display cables for the proper connec-
tion.
1. Verify that the weigh platter is on the scale.
2. Verify that nothing is interfering with or
rubbing against the weighing surface.
3. Press the ZERO key
4. Power down, then power up the scale.
5. Recalibrate the scale.
Troubleshooting
SYMPTOM
No Display(s)
Missing or extra
segments on display
Scale will not return to
zero, or incorrect weight
is displayed
Display shows
unrecognized
characters
Display shows under
“ – – – – ” dashes
(indicates the scale is
below zero or under
capacity).