Stanford Research Systems SR865A Operation Manual page 196

178 Fuse Installation and ac Line Select
ac Voltage Selector
The SR865A line voltage selection is indicated by the white pin visible at the right hand
edge of the power entry module. In the image below, the line voltage selection is showing
120 V. Note that on some units (as pictured below), the 220 V selection can be labeled
230 V; that position is appropriate for both 220 V and 230 V nominal ac line voltages.
The following steps describe how to change the line voltage selection:
1. Disconnect and remove the power cord.
2. Open the fuse cover (see instructions, below, for fuse installation for detailed
3. Pull the voltage selector card straight out of the housing, using small needle-nose
4. Orient the selector card so that the desired line voltage is readable at the bottom
5. Orient indicator pin to point up when desired line voltage is readable at the
6. Insert the voltage selector card into housing, with the printed side of the card
7. Replace the fuse cover and snap into position, verifying the indicator pin is
8. If necessary, replace the fuse for the appropriate rating based on line voltage.
SR865A DSP Lock-in Amplifier
illustrations).
plyers to grip the plastic indicator pin body.
bottom (note that when indicator pin is fixed, successive voltages are selected by
rotating the card 90° clockwise)
facing the fuse and IEC connector. Orient the card so the text showing the
desired voltage is inserted first.
showing at the desired line voltage.
Appendix F