Model SR2555 Stand-On Scale
Rev 991222
SECTION III
S
S
3.0
CALIBRATION
3.1
Periodic Calibration Check - IMPORTANT :
The following calibration procedure should only be performed by
qualified service personnel. The SR2555 load cell, itself, has 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. Our recommendation for calibration check is at least once every 12 months or as your maintenance
policy requires.
3.2
ESD –
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.
3.3
CALIBRATION PROCEDURE
- NOTE: Make sure that nothing is in contact with the scale system during this procedure.
Be sure to remove your hands from the system when noting the displayed calibration results.
1.
The
Calibration Slide Switch (J5)
is located on the bottom side of the display
P.C. board. Expose the Calibration Jumper by removing the two (2) screws on
the bottom side of the display housing and lifting the face plate up and off.
2.
Move the calibration switch to the
CAL ON
position. The display will read
"CALIBRATION MODE".
3.
When in the Calibration Mode, press
"T"
button to zero the display.
4.
Place known calibrated weights on to the weighing surface and compare it to
the displayed reading.
Note:
For best results use around 200 lbs / 90 kgs of
known calibrated weights.
5.
Use the
Key Pad
to enter the proper weight. The displayed value should be
within 0.1% of the calibrated weight plus or minus 1 digit of reading.
6.
Remove the weight and repeat steps 3 – 5 to be sure of consistent results.
7.
Press the
“SAVE”
button to save the calibration data. The display will indicate
“SAVING CALIBRATION” – “HANDS OFF / PLEASE
WAIT”.
DO NOT touch the scale system during this process.
NOTE:
If you make an error of wish to abort your changes, simply
move the calibration switch to the
CAL OFF
position. DO NOT PRESS
“SAVE”
8.
Move the calibration switch to the
CAL OFF
position.
9.
Re-assemble the display electronics.
3.4
CALIBRATION TOLERANCE TABLE
LOW
APPLIED
HIGH
LIMIT
LOAD
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
699.3
700.0
700.7
799.2
800.0
800.8
899.1
900.0
900.9
999.0
1000.0
1001.0
3.5
MAINTENANCE, CARE and CLEANING
- The readout and transducer housing for the SR2555 Scale System is made of
an epoxy powder-coated aluminum casting with stainless steel riser posts. You need only exercise caution when
cleaning the display window of the electronics as this is made of clear polyester . We recommend mild soap and
water for general cleaning and disinfecting.
3.5.01
WARNING: DO NOT
use pressurized water or steam. The scale system contains microprocessor circuitry and strain
gage sensors that may be adversely affected by exposure to such an environment.
3.5.02
STORAGE –
If storing this equipment for periods longer than 3 months remove the batteries. Observe storage
conditions in section 1.2.14
3.5.03
BATTERY REPLACEMENT –
When battery replacement is needed the display will indicate “CHANGE BATTERIES”. When
replacing batteries ALWAYS replace all six batteries at the same time. Use only LR 14 or “C” cell type alkaline
batteries.
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