Dewetron DAQP-LA Series, Техническое справочное руководство

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450134 • DAQP/H SI /PAD Modules • Technical Reference Manual • Printi ng version 2.3.4 • November 18, 2020
DAQP-LA
Isolated current amplifier
30 A current peaks
5 A
RMS
continuous
6 ranges
300 kHz bandwidth
Signal connection
DAQP-LA-B (-S1): Banana plugs
DAQP-LA-SC: Screw terminals (non-standard version)
Module specifications
DAQP-LA-B DAQP-LA-B-S1
Input resistance (Shunt) 0.1 Ohm 5 Ohm
Shunt inductance <10 nH <10 nH
Input ranges
0.1 A, 0.3 A, 1 A, 3 A, 10 A peak, 30 A peak 2 mA, 6 mA, 20 mA, 60 mA, 200 mA, 0.6 A
Continuous current max. 5 A
RMS
max. 0.6 A
Peak current 30 A max. 10 ms; 10 A max. 100 ms 3 A max. 10 ms; 1 A max. 100 ms
DC accuracy
100 mA and 300 mA
1 A to 30 A
2 mA and 6 mA
20 mA to 600 mA
±0.05 % of reading ±300 µA
±0.05 % of reading ±0.05 % of range
±0.05 % of reading ±6 µA
±0.05 % of reading ±0.05 % of range
Off set drift
100 mA and 300 mA
1 A to 30 A
2 mA and 6 mA
20 mA to 600 mA
typ. max.
12 20 µA/°K
20 40 ppm of Range/°K typ . max.
0.24 0.4 µA/°K
20 40 ppm of Range/°K
Gain linearity
0.03 %
Gain drift range Typically 20 ppm/°K (max. 50 ppm/°K)
Long term stability
100 ppm/sqrt (1000 hrs)
Bandwidth (-3 dB) 300 kHz
(1)
Filter selection
Push button or software
Filters (low pass) 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz
Filter characterisitics 10 Hz to 100 kHz: Butterworth or Bessel 40 dB/dec (2nd order; ±1.5 dB @ f0)
300 kHz: Bessel 60 dB/dec (3rd order; 0 to -3 dB @ 300kHz)
Typical SFDR and SNR
100 mA
1 A
30 A
300 kHz 100 kHz 10 kHz
SFDR SNR SFDR SNR SFDR SNR
95 dB 64 dB 95 dB 67 dB 95 dB 77 dB
102 dB 82 dB 103 dB 85 dB 113 dB 90 dB
104 dB 89 dB 103 dB 89 dB 117 dB 91 dB
Isolation voltage Input to Ground 1.4 kV
RMS
Protection CAT III 300 V
CAT II 600 V
Output voltage ±5 V
Output resistance <10 Ohm
Output current 5 mA
Power On default settings Software programable
Output protection Short to ground for 10 sec.
Power supply ±9 V
DC
± 1%
Power consumption 0.7 W
Interface RS-485
(1)
300 kHz exclusively for Bessel fi lter characteristic