isoCAL:
Automatic Calibration and Adjustment
First set either On and reset
the application or On
without resetting the
app. (factory setting) in the Setup
menu under “Balance functions: Cali-
bration/adjustment: CAL key function”.
The “isoCAL” display automatically begins
flashing if the ambient temperature
changes in relation to the temperature
at the time of the last calibration/
adjustment, or after a defined time
interval has elapsed. The balance is
telling you that it wants to adjust itself.
This automatic calibration prompt
is triggered when:
– The change in temperature or the
elapsed time interval is greater than that
shown in the table at the right
– The balance status does not correspond
to Setup configurations
– No number or letter input is active
– The load has not been changed within
the last 2 minutes
–
The balance has not been operated
with-
in the last 2 minutes
– The load on the balance does not
exceed 2% of the maximum capacity
– When you turn on the balance after it
had been disconnected from power
(only on verified balances with a read-
ability of ≤0.1 mg)
When these requirements are met,
C is
displayed in the measured value line.
If the balance is not operated and the
load is not changed, internal calibration
and adjustment starts after 15 seconds
have elapsed.
* = not applicable to verified balances
47
Automatic Calibration and Adjustment
at Set Times*
In the Setup menu (see p. 41 for the
menu path) you can enter up to three
different times of day for automatic
calibration/adjustment.
When one of these times is reached,
the balance will display the flashing
calibration prompt (“isoCAL”). Calibra-
tion/adjustment is not performed if the
balance is off (standby mode) or in the
Setup mode at the time set for calibra-
tion.
If the balance is being operated at
the time set for automatic calibration/
adjustment, the calibration/adjustment
sequence is prompted afterward.
Automatic calibration/adjustment is
prompted at set times when:
– The set time is reached
– The balance is not in Setup mode
– No alphanumeric input is active
(e.g., equation for calculation)
– The load has not been changed within
the last 2 minutes
– The balance has not been operated
within the last 2 minutes
– The load on the balance does not
exceed 2% of the maximum capacity
In the Setup menu, you can configure
the balance so that after calibration and
adjustment
– the application program is restarted
On and reset the
application
– the application program remains
at its previous status
On without resetting
the app.
Also in Setup, you can configure the
balance so that it displays a calibration
prompt, but does not perform the
calibration/adjustment functions
automatically
Only adjustment prompt
Switching Off the isoCAL Function in
Precision Balances with a Readability
>1 mg Used as Legal Measuring Instru-
ments in the EU*:
Automatic calibration and adjustment is
also performed even when
Off or
Only adjustment prompt
is set in the Setup menu.
Limited temperature range:
– Balances of accuracy class k:
+15°C to +25°C (59°F to 77°F)
– Balances of accuracy class K:
+10°C to +30°C (50°C to 86°C)
Standard temperature range:
– 0°C to +40°C (32°F to 104°F)
You can switch off the automatic
adjustment function on verified bal-
ances with a readability >1 mg:
– after modification by the Sartorius
Customer Service
> Subsequently the balance can only
be used when the ambient temperature
range is within legally defined limits.
$ The isoCAL function cannot be switched
off on balances with a readability
<0.1 mg
* including the Signatories of the Agree-
ment on the European Economic Area
Fully automatic adjustment is initiated under the following conditions:
Model when the temperature after a time
changes by interval of
LA310S, LA230S, LA230P, LA120S, 1.5°C 4 h
LA3200D, LA1200S, LA2000P
LA620S, LA620P, LA6200S, 2°C 6 h
LA4200S, LA5200P, LA8200S, LA8200P
LA220S, LA2200S, LA2200P, 4°C 12 h
LA34001P, LA34001S, LA64001S
LA820, LA420, LA16001S, 4°C 24 h
LA12000S, LA12000P, LA6200,
LA4200, LA2200, LA34000
These values are also factory set in the verified or verifiable models
(with the model number suffix -0CE).
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