Rice Lake Sartorius Midrics 1 and 2 Series - Operating Instructions - Manual (Page 23)

Set Preload
Set-up Information
! It is only possible to set a preload when
the menu access switch is open.
– The function set preload (menu item
1.9.8) must be allocated to the key )
- > 2 sec (see page 17).
! After setting a preload, close the menu
access switch and reallocate the original
function back to the key ) - > 2 sec
(e.g. external calibration/adjustment
with user-defined weights) under menu
item 1.9.
Clear Preload
Set-up Information
! It is only possible to clear a preload
when the menu access switch is open.
– The function clear preload (menu item
1.9.9) must be allocated to the key )
- > 2 sec (see page 17).
! After clearing a preload, close the menu
access switch and reallocate the original
function back to the key ) - > 2 sec
(e.g. external calibration/adjustment
with user-defined weights) under menu
item 1.9.
Calibration/Adjustment
without Weights
In the service menu, calibration without
weights can be carried out by entering
the characteristic data of the load cells
(e.g. hopper weighing area with known
characteristic data of the load cells)
Set-up information
! Calibration without weights may not be
carried out on weighing equipment
used in legal metrology.
– Calibration without weights is only pos-
sible when the menu access switch is
open in the service menu.
– The parameters necessary for calibration
without weights are entered in the
Setup menu under “WP 1” when the
service mode is activated. The settings
are made in the corresponding Setup
menu under menu item 1.19.
– The parameter “Nominal capacity” must
be entered in the unit that is set under
1.7.x.
– The parameter “Sensitivity” is entered in
mV/V (take value from e.g. the data
sheet).
– Note:
The data entered are saved by selecting
menu item “1.19.8”. After saving, the
data will no longer be able to be read.
Procedure
– Open the menu access switch
– Activating the service mode
– Select the weighing platform
– Enter the nominal load of the load
cell(s) under menu item 1.19.1. If the
weighing platform has multiple load
cells, the nominal capacity must be
multiplied accordingly (e.g. 4 load cells,
each of which has a capacity of 50 kg,
will produce a nominal capacity
of 200 kg)
– Enter the sensitivity of the load cells in
mV/V under menu item 1.19.3.
– If the weighing platform has multiple
load cells, either the individual values
for the load cells will be entered in
1.19.3 to 1.19.6, or the average value
for all the cells will be entered in 1.19.3.
– Enter the dead load of a hopper con-
struction in mV/V in 1.19.7.
– Save the values for calibration without
weighing under menu item 1.19.8.
– Close the menu access switch
23
Menu Structure for Calibration without Weights
1.19 Calibration without weights (entering the characteristic data of the load cell(s))
1.19.1 Nominal capacity
1.19.3 Sensitivity in mV/V for cell 1 (or average value for all load cells)
1.19.4 Sensitivity in mV/V for cell 2
1.19.5 Sensitivity in mV/V for cell 3
1.19.6 Sensitivity in mV/V for cell 4
1.19.7 Dead load (zero point/offset)
1.19.8 Save values for 1.19