A&D A & D Analytical Balance GH-120/GH-200/GH-300/GH-202/GH-252 - Manual (Page 26)

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8.2.
Automatic Self Calibration
Automatic self calibration due to changes in temperature
This function automatically calibrates the balance when the balance detects an ambient
temperature change. If GLP output is selected in the function table, the balance outputs the
calibration report or stores the data in memory. Automatic self calibration functions even if
the display is turned off (standby state). Refer to "9-1. Permit Or Inhibit" for the operation.
Caution
When using automatic self calibration, do not place something on the weighing pan.
If something is on the weighing pan, the balance decides that it is in use and does
not perform automatic self calibration.
When weighing a light sample or installing the balance in a system, turn off
automatic self calibration.
Note When turning on the balance with nothing on the pan, if a sample heavier than 0.5
g is placed on the pan, the balance detects the state that a sample is placed on the
pan and does not perform the automatic self calibration.
The mark is " prior notice indicator of automatic self calibration".
When the balance detects a change in ambient temperature, this
indicator blinks and automatic self calibration is required. If the
balance is not used for several minutes with this indicator blinking,
the balance performs automatic self calibration. The environment will
affect the time that the indicator blinks.
The balance is measuring calibration data. Do not allow vibration or drafts
to affect the balance while this indicator is displayed. After calibration,
the balance returns to indicate the previous display.
Advise
The balance can be used while the indicator blinks. But, it is recommended that to
maintain the accuracy, stop using the balance and confirm that there is nothing on the
pan and allow the balance to perform self calibration.
8.3. One-Touch Calibration
This function calibrates the balance using the internal mass.
The only operation required is to press the
CAL key.
1 Connect the AC adapter and warm up the balance for at least one
hour with nothing on the weighing pan.
2 Press the CAL key to display Cal in .
3 The balance performs calibration using the internal mass.
Do not allow vibration or drafts to affect the balance.
4 The balance displays end after calibration. If the GLP output is set,
the balance displays glp and outputs the calibration report using
the RS-232C interface or stores the data in memory. Refer to "GLP
output (
info )" and "Data memory ( data )" of the function table.
5 The balance will automatically return to the weighing mode after
calibration.
6 Confirm weighing accuracy using calibration test ( CC in ).
GLP output