B.3 Instrument Base With Load Compensation; B.4 Attaching An Accessory In The Beam Path - Haag-Streit BQ 900 Mode D'emploi

B.3 Instrument base with load compensation
The weight of components or accessories added to the micro-
scope can be compensated by relieving springs so that height
adjustment of the slit lamp remains smooth, no matter what
accessories remain permanently mounted.
Compensating the weight of added components
• Turn the control lever (88) down to its lowest stop, then loo-
sen it by 1/4 turn.
• Swing the microscope and illumination unit to one side.
• Engage all three springs:
Engaging
Turn the screws (87) counter-clockwise until they are in the
uppermost position.
Disengaging
Tighten the screws by turning them clockwise.
• Lift the microscope arm with one hand. Release it and check
whether it returns to the original position. This will not happen
unless the maximum load has been added.
As a rule, it will be necessary to disengage as many relieving
springs as required for ensuring that the arm and spring housing
settle down in their original position.
The load is adequately counter-balanced when the weight of
illumination unit and microscope with all permanently mounted
components exceeds the compensating force of the springs
by a small amount.
B.4 Attaching an accessory in the beam path
Align the positioning points (89) on the upper side of the parts
to be joined.
Close
Push together and tighten firmly the joint in direction of the
arrow by turning it.
87
88
89
1500.7001000.04120
Kleiner Schraubenzieher
Petit tournevis
Small screwdriver
© Haag-Streit AG, CH-3098 Koeniz, Switzerland
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