Martel Electronics 3001 - Manual (Page 82)

11.3 Changing the Line Voltage
The calibrator arrives from the factory configured for the line voltage appropriate for the
country of purchase, or as specified when it is ordered. To verify the line voltage setting,
check the line voltage indicator on the power line fuse compartment cover.
Confirm that the line voltage selection is set for 120 V for line voltages between 90 V and
132 V, or that the selector is set to 240 V for line voltages between 198 V and 264 V.
Warning
To avoid electrical shock hazard disconnect line power before opening the case or
fuse compartment.
To change the line voltage:
1. Disconnect line power.
2. Using the blade of a suitable flat screwdriver, pry up the tab at the base of the
line fuse compartment by inserting the blade in the center slot under the tab.
The compartment cover will pop part way out.
3. Remove the compartment cover.
4. Remove the line voltage selector assembly by gripping the line voltage
indicator tab with pliers and pulling it straight out of the compartment.
5. Rotate the line voltage selector assembly to the desired voltage and reinsert.
6. Verify you are using the appropriate fuse for the selected line voltage (see table
10 above), and reinstall the fuse compartment by pushing it in until the tab
locks in place.
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