The Model 1100A series power potentiostat/galvanostat is designed for electrochemical applications that require relatively large current and high compliance voltage, such as battery, corrosion, electrolysis, and electroplating. The current range is ± 2 A. The compliance voltage is ± 26 V. The instrument contains a digital function generator, a data acquisition system, filters for the current signals, iR compensation circuitry, a potentiostat, and a galvanostat (Model 1140A). The potential control range is ± 10 V. The 1100 series is capable of measuring current down to tens of picoamperes. The steady state current of a 10 mm disk electrode can be readily measured without external adapters. The instrument is reasonably fast. For instance, the scan rate in cyclic voltammetry can be up to 1000 V/s. Multiple data acquisition systems allow an external input signal (such as spectroscopy signals to be recorded simultaneously with electrochemical data).
The CH Instruments model 1100A series is the upgrade from the model 1100 series. The redesigned instrument contains a new processor (about 50 times faster than the 1100) and FLASH memory (allowing instrument updates to be distributed by e-mail instead of the shipment of an EPROM chip). The maximum sampling rate is 200 KHz.
The 1100A series has a serial port (default) and a USB for data communication with the PC. You can select either serial port or USB (but not both) by changing the jumper setting on the board.
A 16-bit highly stable bias circuitry is added for current or potential bias. This allows wider dynamic range is ac measurements. It can also be used to re-zero the dc current output.
There are some other improvements. New techniques, such as AV Voltammetry (ACV), Second Harmonic AC Voltammetry (SHACV), Multi-Current Steps (ISTEP) have been added to the model 1100A series. ISTEP allows cycling through 12 current steps. Multi-Potential Steps (STEP) also allows cycling through 12 potential steps (cf. 6 steps in model 1100 series).