1 2 Adjustments
55000-00011_002_01 – 1756789 – 2017-09-06
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Figure 36
12.4
Setting spring arm spring force type
AC 2000 LCH
The weight of the light head is compensated by a spring which
is installed in the spring arm. The spring force must be
adjusted when the spring arm with the light head does not
reliably stop at the height position selected after a swivel
movement.
12.4.1 Disconnecting the power to the lighting
system
Ceiling-mounted version
1. Switch off the operating theatre master switch.
→ The lighting system is disconnected from the power
supply.
2. Secure the master switch against accidental switch-on.
Mobile stand version
1. Switch off the power supply unit, position the switch in
Position 0 (see Chapter 6.3.1, page 46), pull the mains
cable out of the safety socket.
→ The mobile lighting system is disconnected.
2. Secure the mains plug against unintentional plugging-in.
12.4.2 Adjusting the spring force
1. Insert Allen key ② (5 mm) into the adjustment screw in
the adjus ng opening ①.
2. Place the spring arm in a position approx. +10° or -10° to
the horizontal in order to relieve the load on the
adjustment screw.
A: Ceiling-mounted and wall-mounted versions
Reducing the spring force
• Turn the adjustment screw to the right (clockwise).
Increasing the spring force
• Turn the adjustment screw to the left (anti-clockwise).
B: Mobile stand version
Reducing the spring force
• Turn the adjustment screw to the left (anti-clockwise).
Increasing the spring force
• Turn the adjustment screw to the right (clockwise).
3. Carry out a function test of the spring force.
