Model SR735
i
Wheelchair Scale
Operating and Service Manual
Part No. MAN735
i
_MICROBAN_201210
Page 14 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.
LOW
LIMIT
APPLIED
LOAD
HIGH
LIMIT
99.9
100.0
100.1
199.8
200.0
200.2
299.7
300.0
300.3
399.6
400.0
400.4
499.5
500.0
500.5
599.4
600.0
600.6
999.0
1000.0 1001.0
CALIBRATION
TOLERANCE TABLE
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.
CHECKING CALIBRATION
STEP 1:
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 2:
Zero the scale by pressing and holding
ZERO / WEIGH
button.
STEP 3:
Place the subset of calibrated weight on the scale. Wait for
scale to stabilize; note scale reading.
STEP 4:
Place all of the calibrated weight on scale. Wait for scale to
stabilize; note scale reading. Remove weight.
STEP 5:
The scale readings for both weights should be within the Calibration Tolerance Table
(Figure 8)
Figure 8: Calibration
Tolerance Table
Figure 9: Calibration Switch Diagram
IMPORTANT
CALIBRATION Qualified service personnel only should perform this procedure. The
SR735
i
load cells have no user serviceable components and should not be tampered with
for any reason. Re-calibration is generally not required, but should be verified
periodically to ensure accuracy. The recommendation for calibration check is at least
once every 12 months, or as individual maintenance policy requires.
CALIBRATION SWITCH
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