AWT35-501813
Issue AA
Page 20
6. Calibration
It is recommended to perform only the very first calibration following the function
LF 1
in the
Supervisor
Menu
(page 18). To prevent any unintentionally amendment of the scale configuration, all the next
Calibration should be performed entering the
Quick Calibration Menu
(page 19).
6.1. Enabling the Calibration Procedures
The access to the Supervisor and Quick Calibration Menus is allowed only if the Calibration Switch is
at ON.
Calibr. Switch
User
Menu
Service
Menu
Quick Cal.
Menu
ON
✔
✔
✔
OFF
✔
*
✕
✕
Note:
✔
*
No Gravitational adjustment allowed. The function UF-9 is locked.
Please note:
for legal for trade applications the indicator may be sealed and removing this seal may
void the scale legal for trade stamping, this should only be carried out by a qualified technician.
The switch is located on the bottom edge of the indicator main PBC board. (Fig. 6)
To change the Calibration Switch position, follow these steps:
i.Unplugged the PSU, remove the 4 screw of the case and carefully open the indicator.
ii.Shift gently the switch from right (NOT SEALED) to left (SEALED) and vice versa.
Figure 6
– ZM110 position of the Calibration Switch on the main PCB
6.2. Scale Calibration Procedure
The following procedures assume that the scale has been already properly configured [function
LF 2
],
including the settings of the
Gravitational
correction values [function
LF 7
]
and
Linearity
correction
points [function
LF 3
]
.
Note: Perform the linearity procedure only if test weights applied to the scale between the zero and
span calibration points are showing slight inaccuracies, such as ± a few divisions. If large inaccuracies
are recorded, this indicates a possible mechanical problem or possible load cell failure which linearity
calibration may not be able to correct.
