Gamry ECM8 Operator'S Manual Download

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ECM8



Electrochemical Multiplexer

Operator's Manual



1991-2005 Gamry Instruments, Inc.

Revision 5.0

September 26, 2005

Summary of Contents for ECM8

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Page 3: ...n while talking to us We will be happy to provide a reasonable level of free support for registered users of the ECM8 Electrochemical Multiplexer Reasonable support includes telephone assistance cover...

Page 4: ...tem at any time without incurring any obligation to install same on systems previously purchased All system specifications are subject to change without notice There are no warranties which extend bey...

Page 5: ...printing However Gamry Instruments Inc assumes no responsibility for errors that might appear Copyrights ECM8 Operator s Manual copyright 1991 2005 Gamry Instruments Inc Gamry Framework copyright 1989...

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Page 7: ...ion 3 1 Power Cord and Line Voltage Selection 3 1 Power Up Test 3 2 Communications Test 3 2 Connection to a Gamry Instruments PCI4 or PC4 Potentiostat 3 2 Connection to Gamry Instruments Reference 600...

Page 8: ...Disabling the ECM8 Local Potentiostats 4 15 Comprehensive Index 5 1...

Page 9: ...nd connection is made via the ground prong in the AC line cord When you use the ECM8 with an approved line cord the connection to the protective earth ground is automatically made prior to making any...

Page 10: ...ee the AC input module on the upper left hand corner of the panel Note the number that appears in the small window It is the nominal line voltage setting Table 1 2 shows the range of input voltage for...

Page 11: ...wer line voltage setting used by the ECM8 Please follow these instructions carefully You will need a small flat blade screwdriver to perform this procedure 1 Unplug the AC power line cord from the bac...

Page 12: ...efully You will need a small flat blade screwdriver to perform this procedure 1 Unplug the AC power line cord from the back of the ECM8 The fuses cannot be changed with the AC line cord plugged into t...

Page 13: ...thin the enclosure must not exceed 40 C You may need to provide ventilation holes or even forced air cooling for the enclosure if excessive temperature rise occurs Defects and Abnormal Stresses You sh...

Page 14: ...ratory environments The ECM8 is likely to cause radio frequency interference if operated in a residential environment Electrical Transient Sensitivity Your ECM8 Electrochemical Multiplexer was designe...

Page 15: ...uted standards limiting radio frequency interference from electronic devices and mandating several safety requirements Gamry Instruments Inc has modified its instruments including the ECM8 to comply w...

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Page 17: ...cells in a single test run In this system a sophisticated Microsoft WindowsTM program is used to control both the ECM8 and a Gamry Instruments potentiostat However the ECM8 is not restricted to use i...

Page 18: ...ostat is slightly misleading Most potentiostats can also be used as a galvanostat or as a ZRA zero resistance ammeter in an ECM8 system In the description of this figure keywords will be shown in bold...

Page 19: ...ses a test to be run on that cell The test can be as simple as a single current or potential measurement or as complex as a cyclic scan The computer software and system potentiostat are responsible fo...

Page 20: ...cell to the system potentiostat Channel An ECM8 contains eight channels A channel includes cell switching an Aux A D switch optional a local potentiostat and a D A converter The term cell will be used...

Page 21: ...and switch 1 Amp You can normally use the ECM8 with potentiostats rated at up to 100 volts of output compliance and 2 Amps of output current To avoid transients you should always turn off the cell at...

Page 22: ...local potentiostat has no cell switch other than S3 and it cannot measure current Notice that the reference electrode is always connected to the local potentiostat amplifier You must make sure that t...

Page 23: ...circuit board Appendix B contains a list of the available baud rates and detailed instructions on changing the baud rate switch Warning Always unplug the ECM8 power cord before opening the ECM8 chassi...

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Page 25: ...r of the instrument because all cable connections are made from the rear The ECM8 is not restricted to operation in a flat position You can operate it on its side or even upside down You can also rack...

Page 26: ...unctioning Communications Test A special test script allows you to check communications between your computer and your ECM8 Connect the RS232 cable between the computer and the ECM8 and power up the E...

Page 27: ...e optimal when all the cell cables used are 1 5 meter PCI4 type cables All other cable may create phase and magnitude errors Connection to a Gamry Instruments FAS1 or FAS2 Femtostat Connection of your...

Page 28: ...if this is your situation 1 5 m 4m and 9 m cables are available with banana plug alligator clip termination Specialized cables are also available including cables designed for connection to standard...

Page 29: ...ve channel pin from any source Impedance 500 M Equiv impedance to ECM8 chassis ground 20 pF Local Potentiostat Compliance Current 20 mA 500 load Compliance Voltage 11 volts 1 k load Applied E Range 5...

Page 30: ...Appendix A ECM8 Specifications 4 2...

Page 31: ...he cover Remove this screw making sure that it does not get misplaced 3 Slide the ECM8 top cover backwards and off the chassis You may need to loosen do not remove the set of screws on one side of the...

Page 32: ...Appendix C I O Connections for the ECM8 4 4...

Page 33: ...system potentiostat uses a differential electrometer This pin can be left open when the ECM8 is used with a potentiostat that uses a single ended electrometer 2 WS Shield The shield for the working s...

Page 34: ...ectrode connection carries the cell current Connect the white pin jack to the cell s reference electrode generally an SCE or Ag AgCl reference electrode Connect the red and orange banana plug to the c...

Page 35: ...nse lead 5 Ground The system potentiostat s floating ground 6 Ref Electrode Connect to the reference electrode input on the system potentiostat 7 Ref Shield The shield for the reference electrode cabl...

Page 36: ...entiostat does not have a working electrode sense lead the working sense pin on the ECM8 can be left open You can ignore the counter sense pin on the ECM8 connector unless the cable is intended for us...

Page 37: ...ously In total the ECM8 requires 32 bytes for its registers It also uses one additional location to update the D A converters simultaneously The location of the registers in the microcontroller s addr...

Page 38: ...o the system potentiostat Bit assignments within the Relays register are shown in Table D 2 An X refers to the channel being addressed Relays with an X in their designation eg KX01 exist on each chann...

Page 39: ...n Table D 3 Table D 3 ECM8 Operating Mode Bit Patterns Mode High Signals Hex code Active Cell Aux_A D and Active 18 Inactive Open circuit None 00 Inactive Local Potentiostat Local_Pstat and Work_GND 0...

Page 40: ...ommand With the exception of the E error command and the V version command commands do not generate output from the ECM8 other than the Ready or Error indications The E and V commands generate a hex n...

Page 41: ...nge Examples include a register address greater than 1F or a data byte with more than 2 hex characters Overrun Bit 3 Code 0x08 RS232 input has exceeded the buffer size in the ECM8 I Initialize The ini...

Page 42: ...Update The update command is used to write the shadow RAM registers to the ECM8 hardware When this command is received the data is written as quickly as possible and the UPDATE address location is ac...

Page 43: ...ve a several volt difference between these grounds without any adverse effects on measurements made through the ECM8 Larger ground differences are likely to cause a violation of the 12 volt electrode...

Page 44: ...M8 s front panel towards the ECM8 s rear panel The local potentiostat jumpers are near the back of the instrument There are eight jumpers one for each channel They are located in a gap within the fiel...

Page 45: ...ental specifications 4 1 environmental stress 1 5 Error RS232 command 4 13 faraday shield 4 6 Firmware 4 11 Floating Operation 4 15 floating potentiostats 4 15 fuses 1 2 1 4 ground 4 5 4 15 I O regist...

Page 46: ...static electricity 1 6 storage 1 5 support i system computer 2 3 definition 2 4 system potentiostat 2 3 2 4 Update RS232 command 4 14 ventilation 1 5 Version RS232 command 4 14 Visual Inspection 3 1 v...

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