Time Electronics 1010 User Manual page 11

Time Electronics
1010 DC Voltage Calibrator
2.7.4 240V to 110V conversion
The PU2 mains transformer has two primary 115V windings, these are connected in series
for 240V or in parallel for 110V AC mains. The following procedure should be adopted to
convert from 240V to 110V.
1) Isolate instrument from mains power, remove rear IEC mains input connector.
2) Remove 4 rear panel holding screws, withdraw panel / mains power unit from 1010.
3) Remove PCB metal screening cover.
Note: Take care not to short any part of the circuitry when converting a PU2.
4) Connect mains transformer primary windings in parallel by removing the centre series
link, rewire the two mains input windings to the transformer in parallel (as shown on the
side of the transformer), replace the screening cover. Check safety of mains input.
5) Refit the rear panel, and test.
1010 DC Voltage Calibrator
User Manual
v1.2
Page 11 of 19