Maintenance Procedures Chapter 4
41
6. Plug in the bed power cord.
7. Place two jack stands under the frame at the head or foot end of the bed, depending on the
location of the load cell to replace (see above illustration).
8. Lower the bed until the Allen screws holding the defective load cells to the frame are easily
accessible.
9. Unplug the bed power cord from the wall outlet.
10. Using a 1/4" Allen key and a 1/2" wrench, remove the two nuts/Allen screws (B) holding the
defective load cell to the frame.
11. Disengage the defective load cell cable from the cable ties holding it along its path to the
scale control board and remove it from the board. Remove the defective cell.
12. Inspect the elastomer sleeves (C) to ensure that the inner circular hole has not become
elliptic. Replace if it is the case.
13. Reverse the above steps to install the new load cell.
14. Calibrate the scale before returning the bed to service. Refer to the scale calibration
procedure below.
SCALE CALIBRATION (OPTIONAL)
• Verifying the Scale Accuracy
1. Empty the bed from all unnecessary material (accessories, linen, mattress, etc.) and zero the
scale by doing the following:
• Press to activate the scale. The screen will display:
WEIGHT ANGLE
XXX.X KG +/-XX.X°
• Press and hold ZERO. Display will read:
HOLD TO ZERO WT., followed by:
RELEASE TO ZERO (release ZERO), followed by:
DO NOT TOUCH BED (do not touch the bed)
Once done with the zeroing, the system will return to the Scale mode and will display zero
for the weight and the current angle value.
2. Place a calibrated weight on the center of the mattress support. The weight displayed should
be within the following range: ± 2% for a weight equal or over 100 lb (45.4 kg) or ± 2 lb (0.9
kg) if the weight is lower than 100 lb (45.4 kg).
3. If the weight displayed is incorrect, remove the weight from the bed and calibrate the scale.
SUPPORT
POINT
SUPPORT
POINT
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