Seca 727 Series - Scale Calibration Procedure; Adjusting Scale Model 727 and 728

seca
Service manual Adjustment instruction
13.12.00 Reinhold 1 30-34-00-654 Index _
Procedure to adjust the scale model 727 and 728:
1)
Place the scale on a smooth ground. Pay attention that the scale is adapted to the
environment temperature prior to the adjustment.
2)
Connect the scale with the supply unit to the power supply.
3)
The rotary potentiometers at the rear side of the scale can be adjusted by means of a
screw driver (see sketch).
1)
Select a test weight which is
approx. ¾ of max. weight
(15 kg at F
max
=20kg) and
calculate the rated display
value A
S
to be achieved for
the test weight P
L
, taking
into consideration the
acceleration due to gravity of
the location. If the scale is
already located at the right
location then A
S
= P
L
2)
Start the scale, wait until 0.0
is displayed and weight it
with test weight P
L
. Adjust
the display coarsely with
potentiometer
INCLIN.COARSE and finely
with potentiometer
INCLIN.FINE. Adjust the
potentiometers such, that
the display of the scale
corresponds to the rated
display value A
S
.
3)
Remove the test weight from
the scale and restart it.
Weight the scale with the
test load and check if the
display value corresponds to the rated display value (tolerance +/- 5 g). If not, repeat
steps 5) and 6) described herein.