Stryker 2031, Maintenance Manual, Page: 56 / 185

page 7–3
Scale System Diagnostics and Calibration
Verifying Scale Accuracy:
1. Zero the empty bed. Place a known weight on the center of the bed; the heavier the better and no less
than 100 pounds. The displayed weight should be within 1% of the actual weight.
2. If the displayed weight is not accurate, remove the weight from the bed and proceed to the Scale Calibration
section.
Scale Calibration:
NOTE
It requires two people to enable the calibration mode for the scale system.
Raise the siderails when calibrating the scale to avoid getting inaccurate scale readings due to possible inter-
ference between the siderails and the casters.
Calibrate the scale system with a known 200 pound weight. If exactly 200 pounds is not available, the factory
default for calibration will have to be changed as described in step 8.
1. To enter the calibration mode, unplug the bed’s power cord from the wall socket.
2. Press and hold down the LBS/KGS button.
3. While still holding the LBS/KGS button, plug the bed’s power cord into the wall socket.
4. After two seconds, release the LBS/KGS button. The LCD should read “CALIBRATE SCALE”. The cal-
ibration mode is now active.
5. Using the up or down arrow button (ZERO or SCALE ON/OFF), toggle through the menu until “INIT. TO
DEFAULTS” is displayed. Press and hold the ENTER button (LBS/KGS) until “SAVING DEFAULTS” is
displayed. Release the ENTER button.
6. Using the up or down arrow buttons (ZERO or SCALE ON/OFF), toggle through the menu until “CALI-
BRATE SCALE” is displayed.
7. Press and hold the ENTER button (LBS/KGS). Zero the bed, following the displayed instructions. When
the bed is zeroed, the LCD should display “REF X100=<2 0000”. This is the factory default for 200
pounds. If 200 pounds will be used to calibrate the scale, proceed to step 9.
8. If exactly 200 pounds is not available, change the display to match the weight you are using. Pressing
the TREND/FOWLER ANGLE button will move the cursor position to the right. Pressing the up arrow
(ZERO) button will increase the numbers. Pressing the down arrow (SCALE ON/OFF) button will de-
crease the numbers. Scroll through the numbers until they match the weight you will use for calibration.
9. Press and release the SCALE ON/OFF button and the LCD will display “PRESS REV. TREND”. Press
the button with the Reverse Trendelenburg symbol (feet down/head up) until the bed reaches full reverse
Trend. Release the button and the LCD will display “DO NOT TOUCH BED”.
10. The LCD will display “PRESS TREND.” Press the button with the Trendelenburg symbol (feet up/head
down) until the bed reaches full trend. Release the button and the LCD will display “DO NOT TOUCH BED”.
11. The LCD will display “CALIBRATE SCALE”. This indicates the calibration procedure is complete.
12. Exit scale calibration by pressing the up arrow button (ZERO) until the LCD displays “EXIT DIAGNOS-
TICS”. Press the ENTER (LBS/KGS) button to exit.
13. Level the bed at a full up or full down position. Remove the weight and zero the bed.
14. Verify scale accuracy and functionality before returning the bed to service.