14
7. CALIBRATING THE BALANCE
For details on calibration, read the BM series instruction manual in addition to this manual.
Before calibration, refer to “3. PRECAUTIONS BEFORE USE”. Because the BM series has an
especially high weighing sensitivity, make sure that the installation environment is appropriate and the
balance is warmed up for the appropriate duration, one hour or more.
7-1
Calibrating Using the Internal Mass
(Calibration of balance)
With the holder installed on the balance, it is possible to
calibrate the balance with one touch using the internal mass.
1 When the BM-20 / 22 are used:
Confirm that the microfuge tube holder is installed on
the balance.
When the BM-252 / 500 / 300 / 200 are used:
Confirm that the 30 mL sample cup holder is installed,
or the microfuge tube holder and the balance weight
are installed on the balance.
2 With nothing in the holder, connect the AC adapter and
warm up the balance for at least one hour.
3 Press the CAL key to display
Cal
in
.
4 The balance performs calibration using the internal mass.
Do not allow vibration or drafts to affect the balance.
5 If GLP output is set,
glp
is displayed, the calibration test
report is output to the RS-232C interface or stored in memory.
(For details, refer to "GLP output (
info
)" and "Data memory
(
data
)" settings in the function table in the BM series instruction
manual.)
end
is displayed after the calibration.
6 The balance will automatically return to the weighing mode.
7 A calibration test (
CC in
) can be used to confirm whether the
balance was calibrated correctly. (For details, refer to the BM
series instruction manual.)
NOTE When you install the normal weighing pan in place of the holder and
-e-
is
displayed, calibrate the balance again with the normal weighing pan installed.
GLP output
30 mL sample cup holder
BM-252 / 500 / 300 / 200
BM-20 / 22
Microfuge tube
holder
Balance weight
Microfuge
tube holder
Evaporation
trap
