ADWEL WTD-501, Operating Manual, Page: 12 / 57

12
2.1 ELECTRONIC CASE OVERVIEW
The Electronic Case houses the system power supplies, electronic circuit boards and
interface wiring. The WTD Model 501 is designed to be a rugged instrument. However, the
user should exercise care in handling the unit.
Figure 4: WTD Electronics Case Back Panel
The power supplies included are an unreg24V supply and a +15 and –15 VDC
regulated supply. Power to the system is supplied through a standard outlet and detachable
power cord on the rear panel of the electronic case, at the power entry module. The power
entry module (Figure 5) includes the power switch, fuses, voltage selector, and voltage
indicator. Because of different voltage needs for different parts of the world, choose 115 if
voltage needs range between 100 and 120, or choose 230 if voltage needs range from 220-
240. The probe and computer connectors are marked and located on the front panel (Figure
6).
Figure 5: Power Entry Module on Back Panel; Closed and Pried Open