Gamry ECM8, Operator'S Manual

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Chapter 1 -- Safety Considerations--Changing the Line Voltage Selection
1 - 3
Warning
The AC line fuses are important components for safe operation of the ECM8.
Do not replace the fuses with incorrect values or types or in any way
circumvent the fuse action. If your ECM8 routinely blows the AC line fuses it
indicates a serious problem with the ECM8. Contact Gamry Instruments,
Inc., for repair information.
Gamry Instruments has attempted to ship your ECM8 configured for the line voltage in your area. This
includes both the line voltage setting and the fuses installed in the ECM8. Spare fuses appropriate for your
line voltage have also been included. If an error was made in the fuse selection, please contact your local
sales representative to get the correct fuses.
Table 1-3
AC Line Fuse for Each Nominal Line Voltage Setting
Step by step instructions for changing the AC line fuses in an ECM8 are shown in the section of this chapter
titled Changing the AC Powerline Fuses.
Changing the Line Voltage Selection
This section of the ECM8 manual gives step-by-step instructions for changing the AC power 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 back of the ECM8. The line voltage cannot be changed
with the AC line cord plugged into the ECM8.
2) Locate the AC input module on the upper left hand corner of the ECM8 rear panel. It can be
identified by the line cord connector built into it.
3) Notice the line voltage setting that appears in the small window on the AC input module.
4) Find the small slot on the right side of the AC input module near the line voltage setting window.
Place the blade of a small screwdriver in this slot and pry open the AC input module.
5) Note that the line voltage selection (120 Vac, 240 Vac, etc.) is written on a plastic cylinder in the
AC input module. Gently rotate this cylinder so that your desired line voltage selection will appear
in the window when the AC input module is closed again.
If you are curious how a plastic cylinder can change a voltage setting, this cylinder is also a cam
that moves metal contacts in the AC input module.
6) Check that you have the correct fuses for your new line voltage setting and change the fuses if
necessary.
Nominal Setting Fuse
100 1 Amp
120 1 Amp
220 1/2 Amp
240 1/2 Amp