Calibration and Adjustment
Purpose
Perform calibration to determine the dif-
ference between the value displayed and
the actual weight on the platform. Cali-
bration does not entail making
any changes within the weighing instru-
ment.
Perform adjustment to eliminate any dif-
ference determined, or to reduce
it to a level that is within the applicable
tolerance limits.
Configuration for Use in Legal Metrolo-
gy
To configure the Midrics for use in
legal metrology, adjust the switch on the
back of the display and control unit (A/D
converter configuration: Verif. selected
for legal-for-trade applications). The
switch is covered by a
protective cap.
Position:
§ Switch on the right: For use in
legal metrology
§ Switch on the left: External calibration/
adjustment accessible
Features
You can configure the parameters
listed below in the operating menu.
Which of the features listed here are
available depends on the connected
weighing platform.
– External calibration/adjustment blocked
in verified weighing instruments
– External calibration/adjustment with the
default weight value or standard weight
(not available on verified
instruments). Configure under:
Setup
wp-1
1.9.
: (Calibration and adjustment)
– Specify the weight for external
calibration/adjustment:
Setup
wp-1
1.18.
: (Enter calibration weight)
– Block the ) key to prevent use of the
two functions described above (1.9.10):
Setup
wp-1
1.9.
: (Calibration and adjustment)
– Calibrate first; then adjust
automatically or manually (not on
verified weighing instruments):
Setup
wp-1
1.10.
: (Calibration/adjustment sequence)
– Block external calibration/adjustment:
Setup
wp-1
1.16.
: (External calibration)
Note
On verified weighing instruments,
the external calibration/adjustment func-
tion is available only when the menu
access switch is in the “open" position,
which entails breaking the
verification seal. The equipment must be
re-verified after the seal has been broken.
Setting or clearing
the Preload
The preload can be set only when the
menu access switch is open (see
diagram).
§ The “set preload" function must be
assigned to the ) key (menu item
1.9.8).
§ After setting the preload, close the menu
access switch and reset the ) key to its
previous function (e.g., external calibra-
tion/adjustment with user-defined
weights) under menu item 1.9.
The preload can be cleared only when the
menu access switch is open.
§ The “clear preload" function must be
assigned to the ) key (menu item
1.9.9).
§ After clearing the preload, close the
menu access switch and reset the )
key to its previous function (e.g., external
calibration/adjustment with user-defined
weights) under menu item 1.9.
Preparation
§ Switch on the scale: Press e
§ While all segments are lit,
press the ) key
§ Select the Setup menu: Press k
repeatedly until
Setup is displayed
§ Open the Setup menu:
Press the ) key
$ Select weighing platform 1, “
WP1”:
Press the ) key, or
$ Select interface 1, “
COM1" or interface
2, “
COM2" (depending on the interface
used): Press the ) key
Setup
wp-1
1
1.9. Calibration and
adjustment
1.9.1* Ext. calibration/adjustment;
default weight
1.9.3 Ext. calibration/adjustment;
user-defined weight (menu
code 1.18.1)
1.9.8. Set preload
1.9.9. Clear preload
1.9.10 No function when you
press and hold ) > 2 sec
1.10. Calibration/adjustment
sequence
1.10.1 Calibration with automatic
adjustment
1.10.2* Calibration with adjustment
triggered manually
1.11. Zero-setting range
1.11.1 1 percent/max. cap.
1.11.2* 2 percent/max. cap.
1.12. Initial zero-setting range
1.12.2 2 percent/max. cap.
1.12.3 5 percent/max. load
1.12.4* 10 percent/max. load
1.13. Tare/zero at power on
1.13.1* On
1.13.2 Off; load previous
tare value
1.13.3 Only zero at power on
1.16. External calibration/
adjustment
1)
1.16.1* Accessible
1.16.2
2)
Blocked
1.17.
1.17.1 Grams
1.17.2* Kilograms
1.17.4 Pounds
1
)
1.18. Enter calibration weight
1.18.1 External user-defined
weight; (enter value;
e.g.: 10,000 g)
§ Save settings and exit operating menu:
( key (repeatedly)
53
1
) = Setting cannot be changed on scales
verified for use in legal metrology
2
) = Factory setting on instruments verified
for use in legal metrology
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