Dewert User Manual DX1 Series– Updated 05.2021/1 MDR Page 6 of 16
2. Operating manual
2.1 Table design
When designing the table frames, special emphasis was placed on functional and operational safety. The
number of possible pinching points has thus been minimised, while remaining ones have been covered or
protected with spacers to prevent injury, thus ensuring safe and yet simple operation. Nevertheless,
necessary caution must always be exercised when using the table.
The table consists of the following assemblies: - underframe, - scissor section, - upper frame, - upholstery.
Depending on the respective version, these assemblies can feature further attachment parts. The surfaces of
the welded design are plastic coated.
The height adjustment unit is located between the scissor section and the underframe, which guarantees very
high power transmission even in the lowest adjustment range (min. height). By extending or retracting the
lifting tube, the scissors are pushed apart or together, thus enabling adjustment of the lying surface.
The electrical adjustment system does not pose a hazard to the health and safety of the user or the patient
when used as intended. The lifting motor is activated by a low control voltage.
2.2 Height adjustment
Height adjustment (all models with electromotive height adjustment)
To adjust the height, the enclosed foot switch (optionally also hand switch) is operated according to the
marking.
Beforehand, brief activation (double tap) must take place via the foot switch (or the hand switch). Please refer
to section 7. The table is lifted or lowered.
Height adjustment using foot switch rails (optional)
The electric motor for height adjustment is operated by a switch rail attached to the long side of the table,
which can be operated with your foot.
Press the switch rail down = the table is lifted.
Lift the switch rail up = the table is lowered.
Here, too, brief activation (double tap) must take place beforehand (see section 7).
Alternatively, the switch rails can also be led out to the short side of the table. This facilitates
height adjustment from the short sides of the table. The lifting motor is equipped with a freewheeling clutch as
standard. This ensures automatic declutching if an obstacle is encountered when lowering. In other words,
the active tractive force of the motor no longer acts; instead, simply the weight of the upper part of the table is
applied. In the event of unforeseen entrapment, the risk of injury is significantly reduced.
Note on operation
The electric motor is to be operated in intermittent duty mode. This means that a maximum duty cycle
of 25 s must not be exceeded. Before switching the motor back on, an interruption time of at least 400
s must be observed. If the maximum duty cycle is exceeded, an internal thermal switch (protective
temperature limiter) in the motor interrupts the power supply to the actuator. After the electric motor
has cooled down, the thermal switch automatically reconnects the power supply to the actuator.
Height adjustment (with hydraulic height adjustment)
At tables equipped with hydraulic height adjustment, the height is adjusted by repeatedly depressing
(pumping) the foot lever on one side of the table.
To lower the table, the foot lever is simply lifted with your foot.
If the table is only lifted slightly each time the foot lever is depressed after transport or a longer period of non-
use, air bubbles have formed in the hydraulic system. To remove the air bubbles, pump the table upwards
under load and perform an additional 20 - 30 strokes of the pump when the table is in the uppermost position.
This will force air out of the system.
2.3 Upholstery adjustment
Despite the very robust and strong design of the gas spring, the head part must not be used for
sitting!
