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© HAAG-STREIT AG, 3098 Koeniz, Switzerland - HS-Doc. No. 1500.7220067.04180 – 18. Edition / 2020 – 01
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
8.3 Checking the tonometer
NOTE!
This check must be carried out once a month. If the check yields erro‑
neous results, please check the following points:
1. Is the measuring prism properly positioned?
2. Is the control weight correctly set?
3. Repeat the check.
Defective equipment must be sent immediately to your HAAG‑STREIT represent‑
ative.
NOTE!
HAAG‑STREIT offers a repair and service package. For further infor‑
mation, please contact your HAAG‑STREIT representative directly.
60 mm Hg
20 mm Hg
0 mm Hg
20 mm Hg
60 mm Hg
(a)
Test at 20 mm Hg
A control weight is used for the check. The weight rod is engraved with five rings.
The middle ring corresponds to 0 mm Hg, the rings immediately to its left and right
correspond to a value of 20 mm Hg, and both outside scale rings have a value of
60 mm Hg.
One of the test position marks (20 or 60 mm Hg) is set exactly to the index line on
the holder. The weight is fitted on the feeler axis (a) so that the longer part points to
the examiner.
Check position 19.5
The sensor arm must not move from the free‑movement area toward the limit stop
in the direction of the examiner before the display shows 19.5 mm Hg or after the
display shows 20.5 mm Hg.
Check position 20.5
The sensor arm must not move from the free‑movement area toward the limit stop
in the direction of the patient before the display shows 20.5 mm Hg or after the dis‑
play shows 19.5 mm Hg.
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