Metrohm 757 VA Computrace - Manual (Page 61)

5 Technical data
757 VA Computrace – Hardware
57
5 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, rotating disk electrode (RDE) as option.
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)
CV Cyclic Voltammetry (digital ramp)
Potentiostat
Output voltage (AE) ± 12 V
Output current (AE) ± 35 mA
Sweep voltage range ± 5 V
Voltage resolution 150 µV
Input impedance(RE) R ≥ 1·10 10 Ω
Input Bias Current (RE) ± 10 pA
Noise typ. 200 pA
Circuit for measurement of the noise:
100 nF
AE RE WE
Measurement mode: Differential Pulse
(method used: DPNoise.mth)