29
Operating the Balance
isoCAL:
Automatic Calibration and Adjustment
Either 1 15 3 or 1 15 5 must be
selected in the Setup menu.
The “isoCAL” display automatically
begins flashing if the ambient
temperature has changed 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 self-calibrate
and adjust.
This adjustment prompt is activated
when:
– The change in temperature
or the elapsed time interval is
greater than that shown
in the table below
– The balance status does not
correspond to Setup configurations
– No number or letter input is active
– The load on the pan has not been
changed within the last 2 minutes
– The balance has not been
operated within the last 2 minutes
– The weight on the pan must be
no more than 2% at the most of
the maximum capacity of the
balance
When these requirements are met,
the following symbols are displayed:
– C in the measured value line
–
isoCAL
in the symbol display
– G in the weight unit display
If the balance is not operated and
the load is not changed, internal
calibration and adjustment starts after
15 seconds have elapsed.
In the Setup menu, you can
configure the balance so that after
calibration and adjustment
– the application program
must be restarted
(On + reset app. 1 15 3), or
– the application program
resumes where it left off
(isoCAL on, 1 15 5)
Fully automatic adjustment is initiated under the following conditions:
Model When the temperature After a time
changes by interval of
LP 3200D, LP 1200S 1.5 Kelvin 4 h
LP8200S, LP8200P, 2 Kelvin 6 h
LP 620S, LP 620P, LP 6200S,
LP 4200S, LP 5200P, LP 220S
LP 2200S, LP 2200P, 4 Kelvin 12 h
LP 34001P, LP 34001S, LP 64001S
LP 820, LP 420, LP 16001S, 4 Kelvin 24 h
LP 12000S, LP 12000P,
LP 6200, LP 4200, LP 2200,
LP 34000
These values are also set in the corresponding verified or verifiable balances
(LP models with the -0CE designation).
In the Setup menu, you can also
configure the balance so that it
displays an adjustment prompt,
but does not perform the calibration/
functions automatically
(Only adj. prompt, 1 15 2)
Function in Verified Balances:
Automatic calibration is also
performed outside of the limited
temperature range if you set menu
code 1 15 1, “isoCAL function: off”
or code 1 15 2, “only at adjustment
prompt” in the Setup menu.
To generally deactivate automatic
calibration in balances with
a weighing capacity ≤12 kg:
– After the balance has been
modified by the Sartorius
Service Center
> Afterwards, the balance
can only be used for legal
metrology within the
temperature range allowed
by law
Limited temperature range:
– For balances of accuracy
class k: +15°C to +25°C
(59°F to 77°F)
– For balances of accuracy
class K: +10°C to +30°C
(50°F to 86°F)
Extended temperature range:
–0°C to +40°C
(32°F to 104°F)
Deactivating the “isoCAL”
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