LW Measurements HRB 303 300g x 0.001g - Manual (Page 6)

4.2.2.4 Setting overload range
4.2.2.5 Setting Beeper
4.2.2.6 Setting ZERO and TARE function merge function
4.2.2.7 Setting Auto Shut off
4.2.2.8 Setting Backlight
5 Calibration using an external calibration weight
6 Maintenance and service
7 Transport and storage
7.1 Transportation and shipping
7.2 Storage
5
5 Calibration - Using an External Calibration
Weight
Calibration is required when the weighing machine is initially installed or if the
Balance is moved to a substantial distance from the original location. 30
minutes of warming up of the Balance is always needed before weighing and
calibration.

Turn the Balance on and when display shows “--------”, press ZERO
key
 The display will show “CAL”
 Press ZERO key again, the display w ill show “X000.00”, “X” is the
flashing digit

Press UNIT key, the flashing digit will move to right
 Press TARE key to increase the value of the flashing digit(“X” is the
calibration weight can be set according to users’ requirements, we
recommend a minimum weight of at least 50% of the Balance capacity)
 Press ZERO key, display will show “CAL” and then series of the digit,
wait for stable indication shows, press UNIT key , display will show
--------
, then “X000.00”
 Place the corresponding test weight on the center of the pan
 The display backlight activated and returns to weighing mode
 Now the calibration is completed
 Turn off the power, then turn on the power again, place a known weight
on the platform to verify if it is accurate.

If not, repeat above steps.
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