Product overview
KL3356
11
Version: 2.3.0
Strain gauge reference signal
The strain gauge reference signal is also acquired with a resolution of 16 bits (+ sign) at longer intervals.
This value is saved as a data word, without sign, in register
. The sign is represented in bit
of the status word.
The length of the sampling interval is defined, in multiples of 100 ms, in register
.
Calculating the weight
Every time the analog signal is acquired, the weight that it indicates is calculated. This is composed of the
ratio between the measuring signal and the reference signal, and of a number of calibrations:
Y
R
= (U
Diff
/ U
Ref
) x (E
max
/ C
n
) x 1000 / 500
(1.0)
Calculation of the raw weight value
Y
S
= Y
R
x A
S
(1.1)
Scale factor
Y
H
= Y
S
x A
H
+ B
H
(1.2)
Manufacturer scaling
Y
OUT
= Y
H
x A
A
+ B
A
(1.3.0)
=0
bin
)
Y
OUT
= (Y
H
+ B
A
) x A
A
(1.3.1)
User calibration (if
bin
)
Key
Name Name
Unit
Register
U
Diff
Measuring signal from the load cell
[1]
U
Ref
Reference signal from the load cell
[1]
E
max
Nominal weight of the load cell
[1 kg]
C
n
Nominal parameter of the load cell
[1 mV / V]
A
S
Scale factor (can be activated via bit
[1]
B
H
Offset of the manufacturer scaling (can be activated via bit
the feature register)
[1]
A
H
Gain of the manufacturer scaling (can be activated via bit
feature register)
[1]
B
A
Offset of the user's scaling (can be activated via bit
of the
feature register)
[1]
A
A
Gain of the user's scaling (can be activated via bit
feature register)
[1]
The factor of 1000 in
results from normalizing the units of the nominal weight [kg] and the
nominal parameter [mV/V]. The factor 1/500 is specified through a voltage divider. The result is written into
the terminal's process image with a resolution of 16 bits (+ sign). This value is saved as a data word, without
sign, in register
. The sign is represented in bit
Operation modes
The KL3356 provides different operation modes:
Summary of Contents for KL3356
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