15
4. SPECIFICATIONS
4.1. Electronic Specifications
With the VersaSTAT LC option connected to the appropriate potentiostat, the following specifications are
in order. All other specifications not listed default to the connected potentiostat.
4.1.1 System Performance
•
Minimum Current Range with VersaSTATs 4pA (4 x 10-12 A)
•
Minimum Current Range with PARSTAT 4000 80 fA (80 x 10-15 A)
•
Minimum Current Resolution 122 aA (122 x 10-18 A)
4.1.2. Power Amplifier
Maximum Current: +/- 200mA
4.1.3. Differential Electrometer
Input Bias Current
< 200 fA at 25
o
C
Maximum Voltage Range
+/- 10 V maximum
Input Voltage Differential
+/- 10 V Bandwidth 700kHz (-3 dB)
Common Mode Rejection
>60dB @ 100Hz, >50dB @100kHz
Input Impedance
> 10
14
Ω in parallel with < 200 fF, typical
4.1.4. Current Measurement
Ranges 12 decades, 200mA to 4pA (80 fA using the PARSTAT 4000) Accuracy (dc)
•
2 μA to 200 mA < 0.2% full scale
•
20 nA and 200nA ranges < 0.5% full scale
•
200pA
– 4pA ranges < 1.0% full scale +/- 500fA full scale
4.1.5. Current Control
Applied Current Range
+/- full scale per range
Applied Current Resolution
+/- 1/32,000 x full scale
Applied Current Accuracy
+/- 0.5% of range, +/- 0.5% of reading
Maximum Current Range/Resolution +/- 200mA /10 uA
Minimum Current Range/Resolution +/- 4 pA / 122aA
4.2. Physical Specifications
Weight
500g (1.1 lbs.), not including cable.
Dimensions
14.6 cm W x 19.1 cm D x 4.54 cm H (5.75 in x 7.5 in x 1.75 in)