MultiWE32: operating instructions 1. Connections The MultiWE32
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1. to the loopcounter Ivium Technologies 2009 1 of 3 NIOMA Alternatively the channelnr Get Line 2 properties can be set directly with the DirectCommand property SetWE32channel SethusChannel Op SetveE32Channel Y Op channel 5etDAC pf SetDigOut op f aitForDigin op Wt ail FRE 2 Simultaneous mode To acquire measurement from all 32 channels simultaneously It is available for the following techniques LSV standard CV standard and CA standard This is activated with the WE32_allchannels method property in Advanced mode 3 When checked the current for nen ccststnntssnanssnnes all 32 working electrodes are recorded Each scan will therefore produce 32 curves Individual curves can be stored with save data while all 32 scans can be stored in a single file with save dataset Ivium Technologies 2009 2of3 NIOMA 3 Applying a potential with the MultiWE32 By default the electrodes of the MultiWE32 act similar to a Bipotentiostat in Scanning mode This means that the potential that is selected by the user is applied on all working electrodes at the same time For example when a CV is run all 32 working electrodes will be sweeping at the same speed As an advanced feature it is possible to give each working electrode an individual offset This offset is subtracted from the base potential Offsets are intended to apply fixed potential differences between t2. NIOMA MultiWE32 operating instructions 1 Connections The MultiWE32 should be connected with the m f HD15 connection cable from the IviumStat or CompactStat cell connector socket to the MultiWE32 HD15 plug The unit must be powered with the external adapter The MultiWE32 D37 cell connector contains e 32 Working electrodes e 1 Counter electrode e 1 Reference electrode e 1 gnd connector 2 Operation NB software 1 75 and firmware 154 or higher required In the IviumSoft program the MultiWE32 functions must first be activated by entering the configuration Connect the IviumStat CompactStat instrument in the menu bar go to Options Options and check the MultWE32 checkbox The MultiWE32 can be operated in 2 modes 1 Sequential mode All available potentiostatic methods can be run in this mode Curent range Connect Before the method is started the Pen user can select the channel m ot hi number from the Direct Control tabsheet Its operation is similar to the HiMUX multiplexer The selected channel will be measured however note that the potential is applied to all channels simultaneously s Cee standard stability kd 1 O kHz filter kd Apply ooo et MUX channel 0 C 100nA Set WE32 channel 0 C 10nA Channel selection can be automated in the Batchmode similar to the HiMUX The Loop Lengel command has a property SetMuxTolndex or SetWE32ToIndex that will set the channel nr
3. he 32 working electrodes which remain constant during a scan Note that the value for the real time potential in the software measurement window and the graph axis will only show the base potential the potential potential range selected by user thus this potential does not include the offset part The offset potentials for each WE are stored in the datafile method parameters The offset potentials can be defined inthe Es e Method parameters selecting a WE32_oftsets l 5 x We32_offset will open a dialog screen select offsets Single value offset that will allow the operator to set independent offsets for each electrode either manually or with a distribution function within a range of 2 V to 2 V e aaee e In this example figure a linear APPI distribution is applied from 1V to 1V C no offsets 0 0000 y Linear distribution Suppose the basepotential is scanned EE from 0 to 1V the WE 1 will sweep from 1 0000 offset 1 da 1V to 2V and WE 32 would sweep from 0 9355 1V to OV 0 8710 To show the scans for all WE s in the 0 5065 graph tick the box WE32_allchannels in 0 7419 the method parameters 0E7774 0 6129 0 5484 0 4539 0 4194 0 GRAD a Note that when a MultiWE32 is used there is no primary base electrode For most applications the offset potentials would remain at OV because potential manipulations are more conveniently done by setting the base potential I
4. vium Technologies 2009 3 of 3
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