640 Doran Scale Exam Table Troubleshooting Chart
Applies to Serial Number V1515926 thru Present
Nothing appears on display
when the On / Zero button is pressed
| Symptom | Check | Solution |
|---|---|---|
| (If applicable) AC adapter is disconnected or malfunctioning. | Check AC adapter connection at the display and at the wall outlet. | Secure connections. Verify wall outlet is functioning. If necessary, replace AC adapter. |
| Display is malfunctioning. | - | Replace scale. |
Scale overloads before scale capacity is
reached
| Symptom | Check | Solution |
|---|---|---|
| Scale overloads. | Calibrate the scale. | Refer to: Calibration Procedure |
Scale drifts off zero
| Symptom | Check | Solution |
|---|---|---|
| Table is located where excessive vibration occurs or close to air currents. | Check for signs of vibration and or air currents around table. | Move table to another location. |
Scale shuts
itself off or will not turn on
| Symptom | Check | Solution |
|---|---|---|
| Cable to platform is pinched. | Check cable to platform to make sure it is not being pinched by platform. | Move cable so it is not being pinched. |
| Indicator connector is loose. | Verify the connector at the rear of the indicator is properly installed. | Plug connector into rear of indicator. |
| (If applicable) AC adapter is disconnected or malfunctioning. | (if applicable) Check AC adapter connection at the display and at the wall outlet. | If using an AC adapter, confirm that it is firmly plugged into a functioning wall outlet. If necessary, replace AC adapter. |
Digital
display acts erratically
| Symptom | Check | Solution |
|---|---|---|
| Display may have lost connection. | Reboot system | Shut power off to scale. Turn power back on. |
| Parameters need set. | Perform parameter set-up. | Refer to: Parameter Set-up Mode |
| Mode setting has been lost due to a power surge or replacement of digital display. | Check mode setting. | Adjust mode setting. Refer to: Revision Display Mode Test |
Digital
display works, but measured weight stays at zero with weight on table
| Symptom | Check | Solution |
|---|---|---|
| Display harness loose or damaged. (The display harness connects the digital display to the scale platform) | Check display harness connections. | Secure connections. |
| Scale platform is malfunctioning. | Verify there is nothing caught in or interfering with the platform. | Replace scale. |
Measured
weight is inaccurate
| Symptom | Check | Solution |
|---|---|---|
| Paper roll interfering with table top. | Check to see if paper roll is in contact with table top. | Reduce the diameter of the paper roll, or remove paper roll completely. |
| Table is not level. | Place level on table top. | Adjust leveling feet as necessary. |
| Table is located where excessive vibration occurs. | Check for signs of vibration at table location. | Move table to another location. |
| Digital scale out of calibration. | Calibrate the scale. | Refer to: Calibration Procedure |
| Display harness loose or damaged. (The display harness connects the digital display to the scale platform) | Check display harness connections. | Secure connections. |
| Load cell may not be functioning correctly. | Check to see if patient is in center of table. | If weight is accurate in center of table, Refer to: Load Cell Check |
| Digital display or scale platform malfunctioning. | - | Replace scale. |
Linear scale
is inaccurate
| Symptom | Check | Solution |
|---|---|---|
| Scale label is not positioned properly. | Measure from end of table top to scale label. | Reposition label if necessary. |
| Measuring arm out of adjustment. | Adjust arm as necessary. | Refer to:Linear Scale Checking Arm Alignment |
Display reads
0, or nothing
| Symptom | Check | Solution |
|---|---|---|
| Cable might be loose or pinched. | Verify cable to platform is connected and not pinched. | Connect cable. Move cable so it is not being pinched. |
| Display may have lost connection. | Reboot system. | Shut power off to scale. Turn power back on. |
