Gamry ECM8, Operator'S Manual

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Appendix B -- Changing The Baud Rate Setting--
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Appendix B -- Changing The Baud Rate Setting
The ECM8 Electrochemical Multiplexer is factory set for RS232 communications at 9600 baud. This setting
should be suitable for the vast majority of applications.
If you must change the ECM8 baud rate you can do so by changing DIP switches inside the ECM8 case.
Follow these instructions:
1. First, you must remove the ECM8 power cord from the ECM8's rear panel power entry module.
WARNING
Dangerous voltages are exposed if the ECM8 chassis is opened with the
power cord connected to a source of AC power. To prevent a shock
hazard that could result in personal injury or even death, always unplug
the ECM8 from its AC power source before removing any panel or cover.
2. The ECM8 top cover is held in place by one screw at the middle rear of the 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 ECM8 if the cover does not slide off easily.
4. You will see that all the ECM8 circuitry is contained on one large printed circuit board. Viewing
this board from the front of the ECM8, the baud rate DIP switch is on the right rear corner of the
board. It is the only DIP switch anywhere on the board so it ’ s easy to find.
5. Refer to Table B-1 for the DIP switch setting required for your desired baud rate.
Table B-1
Baud Rate DIP Switch Settings
6. Set the switches per Table B-1.
7. Replace the ECM8 top cover and its retaining screw.
8. Replace the ECM8 power line cord. The new baud rate will become effective the next time the
ECM8 is powered up.
Baud Rate switch 1 switch 2 switch 3 switch 4
300 off on off off
600 on off off off
1200 on on on off
2400 off on on off
4800 on off on off
9600 off off on off
19200 on on off off