OHAUS CKW-55, Инструкция по эксплуатации

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CKW-55 CHECKWEIGHER EN-39
4. CARE AND MAINTENANCE
4.1 Calibration
When the CKW-55 Indicator is initially set up to a base, it must be calibrated before use to ensure accurate weighing results.
CKW Scale models are shipped pre-calibrated from the factory. However, many conditions may require that the scale be
recalibrated. Temperature changes, geographic gravity variations and rough handling are few reasons why a scale may
need recalibration.
Notes :
1.Make sure that appropriate calibration masses are available before beginning calibration.
2.Make sure that the scale is level and stable during the entire calibration process. The Indicator will retain previously
stored calibration data.
3.Masses required to perform the procedures should be in compliance with the requirements of the scale base being used
with the Indicator.
4.Calibration is unavailable with LFT set to On.
5.Allow the scale to warm up for approximately 5 minutes after stabilizing to room temperature.
6.To abort calibration, press the TARE button anytime during the process.
4.1.1 Span Calibration
Span Calibration uses two points to adjust the scale. One point is called the zero value where there is no weight on the
scale. The other point is the Span value that is often, but not necessarily, at full capacity. The CKW-55 Indicator allows the
user to select alternate Span calibration values. Span values closest to the full scale capacity are recommended to give the
best performance over the entire weighing range. Other Span values may be specified due to limited availability of
calibration masses or for improved accuracy at a lower weight range. Before calibrating the scale, check that the weighing
base is correctly leveled. When any selection within the Read-GMP menu is enabled, calibration results are automatically
printed.
Press and hold the G/N/T
Menu
button until MENU is displayed. When the G/N/T
Menu
button
is released, CAL is displayed.
With CAL displayed, press the Yes button, SPAN is displayed.
Press the Yes button to select and perform Span Calibration.....
The display flashes 0, indicating that nothing should be placed on the platform at this time.
After ensuring that the scale platform is clear, press the Yes button. -C- is displayed while the
zero point is established.