The entry level power supply in the Unilab Retro range
The Lockable Power Unit provides a
c
or d
at 2, 4, 6, 9 or 12 volts, at up to 4 amps
This unit is well suited to everyday power requirements, such as basic electricity, ray optics boxes and immersion heaters
The voltage is selected using a five‐position switch, and can be locked either at a particular voltage, or within a range of voltages, by way of hex socket screws surrounding the selector switch
An Allen key is provided for the teacher or technician to set the desired locks
The form of the output is set by a separate switch, either a
or unsmoothed, unregulated d
Two shrouded 4mm sockets provide the output, and the shroud can be partially unscrewed for other types of connection, such as bare wires
a
and d
are output from the same sockets, and never simultaneously, preventing students from connecting the a
outputs together
The unit has two in‐built layers of protection
The first is a thermal trip on the secondary circuit, with a reset button for when the problem load has been disconnected
The second is a 1A mains fuse, accessed from the front panel, on the primary circuit
Locking mechanism to limit or pre‐set the voltage available to students in specific experiments.4mm output socket/terminals
Thermal ”trip”, which can be reset shortly after removal of the excess load
Robustly made with captive mains lead and integral cable wraps on the back panel
Protected by a time delay mains fuse in the front panel
Complies to EN61010 2010, certificate available on request
