WHP-300-Man-4p.doc
Page 1
12/31/2002
AlanD
Page 1
12/31/2002
Operating Instructions
Weller Model WHP-300 Hot-Plate Solderer De-Solderer
Description
The Preheating and Reflow System WHP 300 is eminently suitable for soldering and
unsoldering tasks in hybrid technology. This device brings the carrier material to the working
temperature for perfect soldering operations without causing any thermal damage to the base
material. The Heating Plate HP 300 is electrically isolated from the power supply mains and
operates with safe low voltage of 27 V AC. The heated area of 100 x 160 mm (European
format) is heated uniformly. Temperature regulation is performed by analogue means. The
desired temperature can be set continuously with a rotary potentiometer control over the
range from 50°C to 300°C. The set point temperature and the actual temperature are displayed
in digital form. The digital temperature indicator can be switched to the desired display mode
(set point or actual value) with a sliding switch. The digital display also contains a luminous
spot for visually checking the action of the temperature controller. As option, a facility is
available for controlling the temperature with an external sensor directly on the heated
component. Switchover to the external sensor takes place automatically when plugging-in the
6.35 mm jack plug on the front of the unit. The case is coated with a permanent electrically
conducting lacquer. A ground potential equalisation connection can be made if required via
the 3.5 mm switching jack-plug socket on the rear of the unit. The mains primary circuit of the
unit is equipped with a resetable current overload cut-out device. This current overload cut-
out device can be reset by pressing the red button after clearing the cause of the current
overload fault.
