Model 7620U Bench Scale User’s Manual
25
Scale will not return to zero, or incorrect
weight is displayed
1. Press the ZERO key.
2. Check for interference of weighing plat-
form.
3. Power off, remove all items from the
platter, and then power on the scale.
4. Recalibrate the scale.
5. Replace the QDT load cell.
Display shows unrecognized characters
1. Check software PROM for proper inser-
tion.
2. Check display cables for the proper
connection.
3. Replace the display board.
4. Replace PROM.
5. Replace the QDT load cell.
Display shows under “_ _ _ _” dashes
(Indicates that the scale is below zero or
under capacity.)
1. Verify that weigh platter is on the scale.
2. Press the ZERO key.
3. Power off, remove any items from the
platter, and then power on the scale.
4. Recalibrate the scale.
5. Replace the QDT load cell.
Display shows center “_ _ _ _” dashes
(Indicates that the scale is outside zero
capacity of ±2%.)
1. Verify that weigh platter is on the scale.
2. Press the ZERO key.
3. Power off, remove any items from the
platter, and then power on the scale.
4. Recalibrate the scale.
5. Replace the QDT load cell.
Содержание 7620U
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