PR 5210 Operating Manual Setup and Configuration
Sartorius 23
4.7.1.4 Deadload
The value of the unloaded scale / empty hopper is the deadload. The input voltage equivalent to this
weight value is displayed/ stored in mV/V. For calculating the voltage for deadload the same formula is
applied as for span (Full scale has to be replaced by dead load), see chapter 4.7.1.5.
Default is 0.000000 mV/V
During calibration it has to be decided:
• To use the empty scale as deadload (normal case)
• To enter the deadload in mV/V (if the scale cannot be unloaded, or the value is known from
previous calibration)
If the deadload has to be changed later (due to weight decrease or increase of the empty scale), it can
be done without influence on the other data like span.
4.7.1.5 Span
The span indicates the equivalent input voltage in mV/V related between deadload and the scale FSD
(full scale).
s) load cellsum of allcapacity (load cell
]ty C [mV/V sensitivi load cell full scale
] = span [mV/V
⋅
Span in [mV/V]
Full scale as a weight value
Load cell sensitivity C [mV/V]
Load cell capacity ( = sum of all load
cells) as a weight value
Default is 1.000000 mV/V
During calibration it has to be decided:
• Set span by weight (load the scale with the calibration weight and enter the value of the
calibration weight)
• Enter the span in mV/V (from calculation of above formula or if the value is known from previous
calibration)
Example of a scale with a load cell capacity of 2t, 2mV/V load cell sensibility and a full scale deflection
of 1000 kg:
After the calibration a value of 0,5 mV/V
had been generated for the deadload.
The Span value is determined to 1 mV/V.
With 12 Volt supply a measuring signal of 6
mV could be calculated for deadload.
This measuring signal could be measured
directly with a voltage meter at the
measuring inputs (M+, M-).
For the Span a measuring signal of 12 mV
could be calculated. At full scale deflection
the measuring signal is deadload value +
Span = 18 mV (M+, M-)
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