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© Haag-Streit AG, CH-3098 Koeniz, Switzerland
1500.7006000.04101
AT 900 C/M AT 900 M/Q AT 900 BQ
AT 870
6
0
6
B. Check tonometer AT 870
This check should be made 1 x per month. In case the check
shows errors:
1. Is the measuring prism properly inserted?
2. Is the check weight precisely adjusted?
3. Repeat check procedure!
Faulty equipment is to be returned immediately to the Haag-
Streit distributor.
NOTICE
Haag-Streit provides a repair and service package. For further
information please contact us directly.
Check at measuring drum setting 0
Swing the feeler arm into the working position and set the
measuring drum to zero.
The feeler arm with the measuring prism inserted must swing
to and fro between both stop pieces, when set in motion.
Check at measuring drum setting
CAUTION This is the most important check
procedure, as the measuring of the ocular pres-
sure in this area is highly significant.
The check weight is to be used for this control procedure.
Five circles are engraved on the weight bar. The middle one
corresponds to drum position 0, the two immediately to the left
and right to position 2 and the outer ones to position 6.
One of the marks on the weight corresponding to drum position
2 is set precisely on the index mark of the weight holder. Holder
and weight are then fitted over the axis of the tonometer so that
the longer part of the weight points towards the patient.
