43
CMD600
A2820−1.1 en
8 System parameters
There are 2 sets of parameters. First set starts on address 0, second set
starts on address 2400. Both sets have the same structure of parameters.
Some parameters are the same in both packets. Those parameters are global
parameters and when parameter is changed then is changed also parameter
on inactive packet.
Below is a list of all parameters, which are stored in EEPROM of charge
amplifier. Protected parameters are written during production and calibration.
In normal use should not be accessed, because complete functionality is
available via command interface.
Num-
ber
Protecti
on
Glo-
bal
Default value Description
0 Y Y −300 Input offset value in quants. Used to
correct input operational amplifier offset
during drift compensation
(min = −2048, max= 2047).
1 Y Y +4.9762E−3 DAC_k
2 Y Y −1.2002E+01 With parameters 1and 2 (DAC_n) is
calculated DAC value in quants, for
desired output voltage: DAC_value =
(output_value−DAC_n)/DAC_k
3 Y Y 4.3737E−4 Corr_offset(k)
4 Y Y −2.2000E−3 With parameters 3 and 4 Corr_offset(n)
is calculated correction offset.
Corr_offset =
Corr_offset(k)*Actualy_PGA_gai n+
Corr_offset(n).
5 Y Y −1.0000E−4 LPF_k
6 Y Y 1.8000E−2 With parameters 5 and 6 (LPF_n) is
calculated correction offset when LPF is
enabled:
LPF_corr_offset =
LPF_k*Actualy_PGA_gain+ LPF_n
7 N N 0.0000E+00 Offset value[V](min = 10,max=10)
8 Y Y 4.8447E−3 AD_k
9 Y Y −3.7000E−2 With parameters 8 and 9(AD_n) is
calculated output voltage:
Output_voltage =
AD_k*AD_quants+AD_n
10 N N N Engineering unit (max 5 characters).
11 N N 1.0000E+00 Sensor sensitivity [V/EnUn]
12 Y Y 0 Protection parameter enabled
(0..protection disabled,1..protection
enabled)
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