
Model SR735
i
Wheelchair Scale
Operating and Service Manual
Part No. MAN735
i
_MICROBAN_201210
Page 15 of 20
S
Instruments, Inc.
,
600 Young Street, Tonawanda, NY 14150
Tel: 716-693-5977 Fax: 716-693-5854 URL:
www.srscales.com
email:
Copyright 2020
S
Instruments, Inc.
CALIBRATION (Cont’d)
SETTING CALIBRATION
NOTE:
Ensure that nothing is in contact with the scale system during this procedure. Remove
hands from the system when noting the displayed calibration results.
STEP 1:
Remove the three (3) screws on the left end cover of the display housing. Remove the
cover. Put the scale system into the Calibration Mode by switching the calibration switch on the
display board (Figure 9).
STEP 2:
Select known calibrated weights, traceable to NIST.
NOTE:
The weights should total at least 500 pounds (half of the maximum scale capacity). Put
aside a subset of weight that is less than half of the combined weight.
DO NOT USE
barbells or
uncalibrated weights.
STEP 3:
Press the
MENU
button until “
FULL = 1000.00 Lb
” is displayed. Change “
FULL”
to the
value of the total weight of the calibrated weights. Use the
UP
arrow button to select the digit and the
DOWN
arrow button to change digit. Press
ENTER
to save changes.
STEP 4:
Press the
MENU
button until “
HALF = 500.00 Lb
” is displayed. Change “
HALF”
to
the value of the subset of the selected calibrated weights. Use the
UP
arrow button to select the
digit and the
DOWN
arrow button to change the digit.
Press
ENTER
to save changes.
STEP 5:
Press
MENU
button until “
3 PT CAL
” is displayed. Press the “
UP”
arrow button.
STEP 6:
Zero the scale by removing all weight from the platform. Press the
UP
arrow button.
STEP 7:
Place the
HALF
weight from Step 4 on platform. Allow weight to stabilize. Press
UP
arrow to save change.
STEP 8:
Place the
FULL
weight from Step 3 on platform. Allow weight to stabilize. Press
UP
arrow to save change.
STEP 9
: Press
“ENTER”
button to save the calibration, or “
WEIGH
” button
to exit without
saving
.
STEP 10:
Switch the scale system out of the Calibration Mode on the display board (Figure 9).
STEP 11:
Place the left end cover on the display housing. Attach using three (3) cover screws.
CAUTION
The integrated circuits and semiconductors on
the printed circuit boards may be damaged
by electrostatic discharge (ESD). Be sure to
use proper handling precautions at all times.