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4.5 Span Calibration
After installation, be certain to complete warm up and span calibration. During span
calibration, the balance must be left in a very stable condition. To do this,
leave the power on at standby (warm up) for an hour or more before performing
calibration. When using the CAUW-D series in the small range (minimum display 0.01mg),
leave the power on for at least four hours.
Also, perform calibration in conditions without people entering and leaving the room and
without air flow or vibration. The CAUW series is equipped with display backlight.
Use of the backlight requires warm up in mass display such as "g", not in standby state.
The default setting of backlight is ON.
For CAUW-D/CAUW/CAUX Series (No operation is required)
Fully-automatic span calibration by PSC
The default setting is ON for PSC, which performs fully-automatic span calibrations.
When PSC is ON, span calibration is automatically performed, if necessary,
when the gram display first appears after the balance is turned ON (See 4.4).
When PSC operates, the weight symbol starts blinking about two minutes beforehand
for notification. During operation, the display will automatically change and the motor
sound of the weight loading system is heard.
In order to ensure proper PSC operation, prevent vibrations and air flow. When gram
display returns after completion of span calibration by PSC, measurement can begin
according to 5.
Basic Operation. (Fully-automatic span calibration by PSC is set to ON by default.
Also, span calibration with built-in calibration weight is set as preset calibration method
by default.
For other methods, please refer to 10. Calibration. The CAUW-D/CAUW series also allow
Clock-CAL function to perform span calibrations regularly by time settings.
For accurate measurement, perform span calibration again when the balance is moved
or when the temperature of the installation site has changed. It is recommended that
either PSC or Clock-CAL be set to ON so that the necessary calibrations will operate
automatically.
Summary of Contents for CAU Series
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