Metrohm 797 VA Computrace - Manual (Page 90)

4 Appendix
797 VA Computrace / Hardware-Manual 8.797.8001EN
82
4 Appendix
4.1 Technical data
Subject to changes!
The listed technical data apply to an ambient tempera-
ture of 25°C.
Brief characterization
PC-controlled system for voltammetry, set chemical workplace with potentiostat
and measuring amplifier.
With Multi-Mode Electrode or rotating disk electrode (RDE).
Tilt-back measuring arm, integrated drip pan.
Current measurement techniques
DC Direct Current
NP Normal Pulse
DP Differential Pulse
SqW Square Wave (10 ... 2000 Hz)
AC1 Phase-sensitive Alternating Current 1
st
harmonic
(1 … 250 Hz)
AC2 Phase-sensitive Alternating Current 2
nd
harmonic
(1 … 250 Hz)
PSA Potentiometric Stripping Analysis (chronopotentiometry)
with chemical oxidation/reduction
CCPSA PSA with Constant Current oxidation/reduction
CV Cyclic Voltammetry (digital ramp)
CVS Cyclic Voltammetric Stripping
CPVS Cyclic Pulse Voltammetric Stripping (Chronoamperometry)
Potentiostat
Output voltage (AE) ± 12 V
Output current (AE) ± 80 mA
Sweep voltage range ± 5 V
Voltage resolution 150 μV
Input impedance(RE) R ≥ 1·10 10 Ω
Input Bias Current (RE) ± 5 pA
Noise typ. 200 pA
Sweep rate with voltage step 10 mV
CV,CVS: 0 … 36.7 V/s
SQW, DC: 0 … 20 V/s
DP, NP: 0 … 0.5 V/s AC1, AC2: 0 … 22 mV/s